ObjectMapper (Jackson JSON Processor)

java.lang.Object
- org.codehaus.jackson.ObjectCodec
- - org.codehaus.jackson.map.ObjectMapper

所有已实现的接口:

Versioned
```
public class ObjectMapper
extends ObjectCodec
implements Versioned
```
This mapper (or, data binder, or codec) provides functionality for converting between Java objects (instances of JDK provided core classes, beans), and matching JSON constructs. It will use instances of JsonParser and JsonGenerator for implementing actual reading/writing of JSON.
The main conversion API is defined in ObjectCodec, so that implementation details of this class need not be exposed to streaming parser and generator classes.
Note on caching: root-level deserializers are always cached, and accessed using full (generics-aware) type information. This is different from caching of referenced types, which is more limited and is done only for a subset of all deserializer types. The main reason for difference is that at root-level there is no incoming reference (and hence no referencing property, no referral information or annotations to produce differing deserializers), and that the performance impact greatest at root level (since it'll essentially cache the full graph of deserializers involved).

嵌套类概要

嵌套类
限定符和类型	类和说明
`static class`	`ObjectMapper.DefaultTypeResolverBuilder` Customized `TypeResolverBuilder` that provides type resolver builders used with so-called "default typing" (see `enableDefaultTyping()` for details).
`static class`	`ObjectMapper.DefaultTyping` Enumeration used with `enableDefaultTyping()` to specify what kind of types (classes) default typing should be used for.

字段概要

字段
限定符和类型	字段和说明
`protected DeserializationConfig`	`_deserializationConfig` Configuration object that defines basic global settings for the serialization process
`protected DeserializerProvider`	`_deserializerProvider` Object that manages access to deserializers used for deserializing JSON content into Java objects, including possible caching of the deserializers.
`protected InjectableValues`	`_injectableValues` Provider for values to inject in deserialized POJOs.
`protected JsonFactory`	`_jsonFactory` Factory used to create `JsonParser` and `JsonGenerator` instances as necessary.
`protected ConcurrentHashMap<JavaType,JsonDeserializer<Object>>`	`_rootDeserializers` We will use a separate main-level Map for keeping track of root-level deserializers.
`protected SerializationConfig`	`_serializationConfig` Configuration object that defines basic global settings for the serialization process
`protected SerializerFactory`	`_serializerFactory` Serializer factory used for constructing serializers.
`protected SerializerProvider`	`_serializerProvider` Object that manages access to serializers used for serialization, including caching.
`protected SubtypeResolver`	`_subtypeResolver` Registered concrete subtypes that can be used instead of (or in addition to) ones declared using annotations.
`protected TypeFactory`	`_typeFactory` Specific factory used for creating `JavaType` instances; needed to allow modules to add more custom type handling (mostly to support types of non-Java JVM languages)
`protected static AnnotationIntrospector`	`DEFAULT_ANNOTATION_INTROSPECTOR`
`protected static ClassIntrospector<? extends BeanDescription>`	`DEFAULT_INTROSPECTOR`
`protected static VisibilityChecker<?>`	`STD_VISIBILITY_CHECKER`

构造器概要

构造器
构造器和说明
`ObjectMapper()` Default constructor, which will construct the default `JsonFactory` as necessary, use `StdSerializerProvider` as its `SerializerProvider`, and `BeanSerializerFactory` as its `SerializerFactory`.
`ObjectMapper(JsonFactory jf)` Construct mapper that uses specified `JsonFactory` for constructing necessary `JsonParser`s and/or `JsonGenerator`s.
`ObjectMapper(JsonFactory jf, SerializerProvider sp, DeserializerProvider dp)`
`ObjectMapper(JsonFactory jf, SerializerProvider sp, DeserializerProvider dp, SerializationConfig sconfig, DeserializationConfig dconfig)`
`ObjectMapper(SerializerFactory sf)` 已过时。 Use other constructors instead; note that you can just set serializer factory with `setSerializerFactory(org.codehaus.jackson.map.SerializerFactory)`

方法概要

方法
限定符和类型	方法和说明
`protected void`	`_configAndWriteValue(JsonGenerator jgen, Object value)` Method called to configure the generator as necessary and then call write functionality
`protected void`	`_configAndWriteValue(JsonGenerator jgen, Object value, Class<?> viewClass)`
`protected Object`	`_convert(Object fromValue, JavaType toValueType)`
`protected DeserializationContext`	`_createDeserializationContext(JsonParser jp, DeserializationConfig cfg)`
`protected PrettyPrinter`	`_defaultPrettyPrinter()` Helper method that should return default pretty-printer to use for generators constructed by this mapper, when instructed to use default pretty printer.
`protected JsonDeserializer<Object>`	`_findRootDeserializer(DeserializationConfig cfg, JavaType valueType)` Method called to locate deserializer for the passed root-level value.
`protected JsonToken`	`_initForReading(JsonParser jp)` Method called to ensure that given parser is ready for reading content for data binding.
`protected Object`	`_readMapAndClose(JsonParser jp, JavaType valueType)`
`protected Object`	`_readValue(DeserializationConfig cfg, JsonParser jp, JavaType valueType)` Actual implementation of value reading+binding operation.
`protected Object`	`_unwrapAndDeserialize(JsonParser jp, JavaType rootType, DeserializationContext ctxt, JsonDeserializer<Object> deser)`
`boolean`	`canDeserialize(JavaType type)` Method that can be called to check whether mapper thinks it could deserialize an Object of given type.
`boolean`	`canSerialize(Class<?> type)` Method that can be called to check whether mapper thinks it could serialize an instance of given Class.
`ObjectMapper`	`configure(DeserializationConfig.Feature f, boolean state)` Method for changing state of an on/off deserialization feature for this object mapper.
`ObjectMapper`	`configure(JsonGenerator.Feature f, boolean state)` Method for changing state of an on/off `JsonGenerator` feature for `JsonFactory` instance this object mapper uses.
`ObjectMapper`	`configure(JsonParser.Feature f, boolean state)` Method for changing state of an on/off `JsonParser` feature for `JsonFactory` instance this object mapper uses.
`ObjectMapper`	`configure(SerializationConfig.Feature f, boolean state)` Method for changing state of an on/off serialization feature for this object mapper.
`JavaType`	`constructType(Type t)` Convenience method for constructing `JavaType` out of given type (typically `java.lang.Class`), but without explicit context.
`<T> T`	`convertValue(Object fromValue, Class<T> toValueType)` Convenience method for doing two-step conversion from given value, into instance of given value type.
`<T> T`	`convertValue(Object fromValue, JavaType toValueType)`
`<T> T`	`convertValue(Object fromValue, TypeReference toValueTypeRef)`
`DeserializationConfig`	`copyDeserializationConfig()` Method that creates a copy of the shared default `DeserializationConfig` object that defines configuration settings for deserialization.
`SerializationConfig`	`copySerializationConfig()` Method that creates a copy of the shared default `SerializationConfig` object that defines configuration settings for serialization.
`ArrayNode`	`createArrayNode()` Note: return type is co-variant, as basic ObjectCodec abstraction can not refer to concrete node types (as it's part of core package, whereas impls are part of mapper package)
`ObjectNode`	`createObjectNode()` Note: return type is co-variant, as basic ObjectCodec abstraction can not refer to concrete node types (as it's part of core package, whereas impls are part of mapper package)
`ObjectWriter`	`defaultPrettyPrintingWriter()` 已过时。 Since 1.9, use `writerWithDefaultPrettyPrinter()` instead.
`ObjectMapper`	`disable(DeserializationConfig.Feature... f)` Method for enabling specified `DeserializationConfig` features.
`ObjectMapper`	`disable(SerializationConfig.Feature... f)` Method for enabling specified `DeserializationConfig` features.
`ObjectMapper`	`disableDefaultTyping()` Method for disabling automatic inclusion of type information; if so, only explicitly annotated types (ones with `JsonTypeInfo`) will have additional embedded type information.
`ObjectMapper`	`enable(DeserializationConfig.Feature... f)` Method for enabling specified `DeserializationConfig` features.
`ObjectMapper`	`enable(SerializationConfig.Feature... f)` Method for enabling specified `DeserializationConfig` features.
`ObjectMapper`	`enableDefaultTyping()` Convenience method that is equivalent to calling enableObjectTyping(DefaultTyping.OBJECT_AND_NON_CONCRETE);
`ObjectMapper`	`enableDefaultTyping(ObjectMapper.DefaultTyping dti)` Convenience method that is equivalent to calling enableObjectTyping(dti, JsonTypeInfo.As.WRAPPER_ARRAY);
`ObjectMapper`	`enableDefaultTyping(ObjectMapper.DefaultTyping applicability, JsonTypeInfo.As includeAs)` Method for enabling automatic inclusion of type information, needed for proper deserialization of polymorphic types (unless types have been annotated with `JsonTypeInfo`).
`ObjectMapper`	`enableDefaultTypingAsProperty(ObjectMapper.DefaultTyping applicability, String propertyName)` Method for enabling automatic inclusion of type information -- needed for proper deserialization of polymorphic types (unless types have been annotated with `JsonTypeInfo`) -- using "As.PROPERTY" inclusion mechanism and specified property name to use for inclusion (default being "@class" since default type information always uses class name as type identifier)
`ObjectWriter`	`filteredWriter(FilterProvider filterProvider)` 已过时。 Since 1.9, use `writer(FilterProvider)` instead.
`JsonSchema`	`generateJsonSchema(Class<?> t)` Generate Json-schema instance for specified class.
`JsonSchema`	`generateJsonSchema(Class<?> t, SerializationConfig cfg)` Generate Json-schema instance for specified class, using specific serialization configuration
`DeserializationConfig`	`getDeserializationConfig()` Method that returns the shared default `DeserializationConfig` object that defines configuration settings for deserialization.
`DeserializerProvider`	`getDeserializerProvider()`
`JsonFactory`	`getJsonFactory()` Method that can be used to get hold of `JsonFactory` that this mapper uses if it needs to construct `JsonParser`s and/or `JsonGenerator`s.
`JsonNodeFactory`	`getNodeFactory()` Method that can be used to get hold of `JsonNodeFactory` that this mapper will use when directly constructing root `JsonNode` instances for Trees.
`SerializationConfig`	`getSerializationConfig()` Method that returns the shared default `SerializationConfig` object that defines configuration settings for serialization.
`SerializerProvider`	`getSerializerProvider()`
`SubtypeResolver`	`getSubtypeResolver()` Method for accessing subtype resolver in use.
`TypeFactory`	`getTypeFactory()` Accessor for getting currently configured `TypeFactory` instance.
`VisibilityChecker<?>`	`getVisibilityChecker()` Method for accessing currently configured visibility checker; object used for determining whether given property element (method, field, constructor) can be auto-detected or not.
`boolean`	`isEnabled(DeserializationConfig.Feature f)` Convenience method, equivalent to: getDeserializationConfig().isEnabled(f);
`boolean`	`isEnabled(JsonGenerator.Feature f)` Convenience method, equivalent to: getJsonFactory().isEnabled(f);
`boolean`	`isEnabled(JsonParser.Feature f)` Convenience method, equivalent to: getJsonFactory().isEnabled(f);
`boolean`	`isEnabled(SerializationConfig.Feature f)` Convenience method, equivalent to: getSerializationConfig().isEnabled(f);
`ObjectWriter`	`prettyPrintingWriter(PrettyPrinter pp)` 已过时。 Since 1.9, use `writer(FilterProvider)` instead.
`ObjectReader`	`reader()` Factory method for constructing `ObjectReader` with default settings.
`ObjectReader`	`reader(Class<?> type)` Factory method for constructing `ObjectReader` that will read or update instances of specified type
`ObjectReader`	`reader(FormatSchema schema)` Factory method for constructing `ObjectReader` that will pass specific schema object to `JsonParser` used for reading content.
`ObjectReader`	`reader(InjectableValues injectableValues)` Factory method for constructing `ObjectReader` that will use specified injectable values.
`ObjectReader`	`reader(JavaType type)` Factory method for constructing `ObjectReader` that will read or update instances of specified type
`ObjectReader`	`reader(JsonNodeFactory f)` Factory method for constructing `ObjectReader` that will use specified `JsonNodeFactory` for constructing JSON trees.
`ObjectReader`	`reader(TypeReference<?> type)` Factory method for constructing `ObjectReader` that will read or update instances of specified type
`ObjectReader`	`readerForUpdating(Object valueToUpdate)` Factory method for constructing `ObjectReader` that will update given Object (usually Bean, but can be a Collection or Map as well, but NOT an array) with JSON data.
`JsonNode`	`readTree(byte[] content)` Method to deserialize JSON content as tree expressed using set of `JsonNode` instances.
`JsonNode`	`readTree(File file)` Method to deserialize JSON content as tree expressed using set of `JsonNode` instances.
`JsonNode`	`readTree(InputStream in)` Method to deserialize JSON content as tree expressed using set of `JsonNode` instances.
`JsonNode`	`readTree(JsonParser jp)` Method to deserialize JSON content as tree expressed using set of `JsonNode` instances.
`JsonNode`	`readTree(JsonParser jp, DeserializationConfig cfg)` Method to deserialize JSON content as tree expressed using set of `JsonNode` instances.
`JsonNode`	`readTree(Reader r)` Method to deserialize JSON content as tree expressed using set of `JsonNode` instances.
`JsonNode`	`readTree(String content)` Method to deserialize JSON content as tree expressed using set of `JsonNode` instances.
`JsonNode`	`readTree(URL source)` Method to deserialize JSON content as tree expressed using set of `JsonNode` instances.
`<T> T`	`readValue(byte[] src, Class<T> valueType)`
`<T> T`	`readValue(byte[] src, int offset, int len, Class<T> valueType)`
`<T> T`	`readValue(byte[] src, int offset, int len, JavaType valueType)`
`<T> T`	`readValue(byte[] src, int offset, int len, TypeReference valueTypeRef)`
`<T> T`	`readValue(byte[] src, JavaType valueType)`
`<T> T`	`readValue(byte[] src, TypeReference valueTypeRef)`
`<T> T`	`readValue(File src, Class<T> valueType)`
`<T> T`	`readValue(File src, JavaType valueType)`
`<T> T`	`readValue(File src, TypeReference valueTypeRef)`
`<T> T`	`readValue(InputStream src, Class<T> valueType)`
`<T> T`	`readValue(InputStream src, JavaType valueType)`
`<T> T`	`readValue(InputStream src, TypeReference valueTypeRef)`
`<T> T`	`readValue(JsonNode root, Class<T> valueType)` Convenience method for converting results from given JSON tree into given value type.
`<T> T`	`readValue(JsonNode root, JavaType valueType)` Convenience method for converting results from given JSON tree into given value type.
`<T> T`	`readValue(JsonNode root, TypeReference valueTypeRef)` Convenience method for converting results from given JSON tree into given value type.
`<T> T`	`readValue(JsonParser jp, Class<T> valueType)` Method to deserialize JSON content into a non-container type (it can be an array type, however): typically a bean, array or a wrapper type (like `Boolean`).
`<T> T`	`readValue(JsonParser jp, Class<T> valueType, DeserializationConfig cfg)` Method to deserialize JSON content into a non-container type (it can be an array type, however): typically a bean, array or a wrapper type (like `Boolean`).
`<T> T`	`readValue(JsonParser jp, JavaType valueType)` Method to deserialize JSON content into a Java type, reference to which is passed as argument.
`<T> T`	`readValue(JsonParser jp, JavaType valueType, DeserializationConfig cfg)` Method to deserialize JSON content into a Java type, reference to which is passed as argument.
`<T> T`	`readValue(JsonParser jp, TypeReference<?> valueTypeRef)` Method to deserialize JSON content into a Java type, reference to which is passed as argument.
`<T> T`	`readValue(JsonParser jp, TypeReference<?> valueTypeRef, DeserializationConfig cfg)` Method to deserialize JSON content into a Java type, reference to which is passed as argument.
`<T> T`	`readValue(Reader src, Class<T> valueType)`
`<T> T`	`readValue(Reader src, JavaType valueType)`
`<T> T`	`readValue(Reader src, TypeReference valueTypeRef)`
`<T> T`	`readValue(String content, Class<T> valueType)`
`<T> T`	`readValue(String content, JavaType valueType)`
`<T> T`	`readValue(String content, TypeReference valueTypeRef)`
`<T> T`	`readValue(URL src, Class<T> valueType)`
`<T> T`	`readValue(URL src, JavaType valueType)`
`<T> T`	`readValue(URL src, TypeReference valueTypeRef)`
`<T> MappingIterator<T>`	`readValues(JsonParser jp, Class<T> valueType)` Method for reading sequence of Objects from parser stream.
`<T> MappingIterator<T>`	`readValues(JsonParser jp, JavaType valueType)` Method for reading sequence of Objects from parser stream.
`<T> MappingIterator<T>`	`readValues(JsonParser jp, TypeReference<?> valueTypeRef)` Method for reading sequence of Objects from parser stream.
`void`	`registerModule(Module module)` Method for registering a module that can extend functionality provided by this mapper; for example, by adding providers for custom serializers and deserializers.
`void`	`registerSubtypes(Class<?>... classes)` Method for registering specified class as a subtype, so that typename-based resolution can link supertypes to subtypes (as an alternative to using annotations).
`void`	`registerSubtypes(NamedType... types)` Method for registering specified class as a subtype, so that typename-based resolution can link supertypes to subtypes (as an alternative to using annotations).
`ObjectReader`	`schemaBasedReader(FormatSchema schema)` 已过时。 Since 1.9, use `reader(FormatSchema)` instead.
`ObjectWriter`	`schemaBasedWriter(FormatSchema schema)` 已过时。 Since 1.9, use `writer(FilterProvider)` instead.
`ObjectMapper`	`setAnnotationIntrospector(AnnotationIntrospector ai)` Method for changing `AnnotationIntrospector` used by this mapper instance for both serialization and deserialization
`void`	`setDateFormat(DateFormat dateFormat)` Method for configuring the default `DateFormat` to use when serializing time values as Strings, and deserializing from JSON Strings.
`ObjectMapper`	`setDefaultTyping(TypeResolverBuilder<?> typer)` Method for enabling automatic inclusion of type information, using specified handler object for determining which types this affects, as well as details of how information is embedded.
`ObjectMapper`	`setDeserializationConfig(DeserializationConfig cfg)` Method for replacing the shared default deserialization configuration object.
`ObjectMapper`	`setDeserializerProvider(DeserializerProvider p)` Method for setting specific `DeserializerProvider` to use for handling caching of `JsonDeserializer` instances.
`void`	`setFilters(FilterProvider filterProvider)` Convenience method that is equivalent to: mapper.setFilters(mapper.getSerializationConfig().withFilters(filterProvider)); Note that usually it is better to use method `filteredWriter(org.codehaus.jackson.map.ser.FilterProvider)`; however, sometimes this method is more convenient.
`void`	`setHandlerInstantiator(HandlerInstantiator hi)` Method for configuring `HandlerInstantiator` to use for creating instances of handlers (such as serializers, deserializers, type and type id resolvers), given a class.
`ObjectMapper`	`setInjectableValues(InjectableValues injectableValues)`
`ObjectMapper`	`setNodeFactory(JsonNodeFactory f)` Method for specifying `JsonNodeFactory` to use for constructing root level tree nodes (via method `createObjectNode()`
`ObjectMapper`	`setPropertyNamingStrategy(PropertyNamingStrategy s)` Method for setting custom property naming strategy to use.
`ObjectMapper`	`setSerializationConfig(SerializationConfig cfg)` Method for replacing the shared default serialization configuration object.
`ObjectMapper`	`setSerializationInclusion(JsonSerialize.Inclusion incl)` Method for setting defalt POJO property inclusion strategy for serialization.
`ObjectMapper`	`setSerializerFactory(SerializerFactory f)` Method for setting specific `SerializerFactory` to use for constructing (bean) serializers.
`ObjectMapper`	`setSerializerProvider(SerializerProvider p)` Method for setting specific `SerializerProvider` to use for handling caching of `JsonSerializer` instances.
`void`	`setSubtypeResolver(SubtypeResolver r)` Method for setting custom subtype resolver to use.
`ObjectMapper`	`setTypeFactory(TypeFactory f)` Method that can be used to override `TypeFactory` instance used by this mapper.
`ObjectMapper`	`setVisibility(JsonMethod forMethod, JsonAutoDetect.Visibility visibility)` Convenience method that allows changing configuration for underlying `VisibilityChecker`s, to change details of what kinds of properties are auto-detected.
`void`	`setVisibilityChecker(VisibilityChecker<?> vc)` Method for setting currently configured visibility checker; object used for determining whether given property element (method, field, constructor) can be auto-detected or not.
`JsonParser`	`treeAsTokens(JsonNode n)` Method for constructing a `JsonParser` out of JSON tree representation.
`<T> T`	`treeToValue(JsonNode n, Class<T> valueType)` Convenience conversion method that will bind data given JSON tree contains into specific value (usually bean) type.
`ObjectWriter`	`typedWriter(Class<?> rootType)` 已过时。 Since 1.9, use `writerWithType(Class)` instead.
`ObjectWriter`	`typedWriter(JavaType rootType)` 已过时。 Since 1.9, use `writerWithType(JavaType)` instead.
`ObjectWriter`	`typedWriter(TypeReference<?> rootType)` 已过时。 Since 1.9, use `writerWithType(TypeReference)` instead.
`ObjectReader`	`updatingReader(Object valueToUpdate)` 已过时。 Since 1.9, use `readerForUpdating(java.lang.Object)` instead.
`<T extends JsonNode> T`	`valueToTree(Object fromValue)` Reverse of `treeToValue(org.codehaus.jackson.JsonNode, java.lang.Class<T>)`; given a value (usually bean), will construct equivalent JSON Tree representation.
`Version`	`version()` Method that will return version information stored in and read from jar that contains this class.
`ObjectWriter`	`viewWriter(Class<?> serializationView)` 已过时。 Since 1.9, use `writerWithView(Class)` instead.
`ObjectMapper`	`withModule(Module module)` Fluent-style alternative to `registerModule(org.codehaus.jackson.map.Module)`; functionally equivalent to: mapper.registerModule(module); return mapper; NOTE: name is unfortunately misleading in suggesting that a new instance might be created (as is the case with most other 'withXxx()' methods for Jackson core objects) -- this is not the case; rather, this is just a variant of `registerModule(org.codehaus.jackson.map.Module)` but one that returns 'this' (like it should return, but does not for historical reasons).
`ObjectWriter`	`writer()` Convenience method for constructing `ObjectWriter` with default settings.
`ObjectWriter`	`writer(DateFormat df)` Factory method for constructing `ObjectWriter` that will serialize objects using specified `DateFormat`; or, if null passed, using timestamp (64-bit number.
`ObjectWriter`	`writer(FilterProvider filterProvider)` Factory method for constructing `ObjectWriter` that will serialize objects using specified filter provider.
`ObjectWriter`	`writer(FormatSchema schema)` Factory method for constructing `ObjectWriter` that will pass specific schema object to `JsonGenerator` used for writing content.
`ObjectWriter`	`writer(PrettyPrinter pp)` Factory method for constructing `ObjectWriter` that will serialize objects using specified pretty printer for indentation (or if null, no pretty printer)
`ObjectWriter`	`writerWithDefaultPrettyPrinter()` Factory method for constructing `ObjectWriter` that will serialize objects using the default pretty printer for indentation
`ObjectWriter`	`writerWithType(Class<?> rootType)` Factory method for constructing `ObjectWriter` that will serialize objects using specified root type, instead of actual runtime type of value.
`ObjectWriter`	`writerWithType(JavaType rootType)` Factory method for constructing `ObjectWriter` that will serialize objects using specified root type, instead of actual runtime type of value.
`ObjectWriter`	`writerWithType(TypeReference<?> rootType)` Factory method for constructing `ObjectWriter` that will serialize objects using specified root type, instead of actual runtime type of value.
`ObjectWriter`	`writerWithView(Class<?> serializationView)` Factory method for constructing `ObjectWriter` that will serialize objects using specified JSON View (filter).
`void`	`writeTree(JsonGenerator jgen, JsonNode rootNode)` Method to serialize given JSON Tree, using generator provided.
`void`	`writeTree(JsonGenerator jgen, JsonNode rootNode, SerializationConfig cfg)` Method to serialize given Json Tree, using generator provided.
`void`	`writeValue(File resultFile, Object value)` Method that can be used to serialize any Java value as JSON output, written to File provided.
`void`	`writeValue(JsonGenerator jgen, Object value)` Method that can be used to serialize any Java value as JSON output, using provided `JsonGenerator`.
`void`	`writeValue(JsonGenerator jgen, Object value, SerializationConfig config)` Method that can be used to serialize any Java value as JSON output, using provided `JsonGenerator`, configured as per passed configuration object.
`void`	`writeValue(OutputStream out, Object value)` Method that can be used to serialize any Java value as JSON output, using output stream provided (using encoding `JsonEncoding.UTF8`).
`void`	`writeValue(Writer w, Object value)` Method that can be used to serialize any Java value as JSON output, using Writer provided.
`byte[]`	`writeValueAsBytes(Object value)` Method that can be used to serialize any Java value as a byte array.
`String`	`writeValueAsString(Object value)` Method that can be used to serialize any Java value as a String.

从类继承的方法 java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- 字段详细资料
  - DEFAULT_INTROSPECTOR
```
protected static final ClassIntrospector<? extends BeanDescription> DEFAULT_INTROSPECTOR
```
  - DEFAULT_ANNOTATION_INTROSPECTOR
```
protected static final AnnotationIntrospector DEFAULT_ANNOTATION_INTROSPECTOR
```
  - STD_VISIBILITY_CHECKER
```
protected static final VisibilityChecker<?> STD_VISIBILITY_CHECKER
```
    从以下版本开始:
    
    1.5
  - _jsonFactory
```
protected final JsonFactory _jsonFactory
```
    Factory used to create JsonParser and JsonGenerator instances as necessary.
  - _subtypeResolver
```
protected SubtypeResolver _subtypeResolver
```
    Registered concrete subtypes that can be used instead of (or in addition to) ones declared using annotations.
    
    从以下版本开始:
    
    1.6
  - _typeFactory
```
protected TypeFactory _typeFactory
```
    Specific factory used for creating JavaType instances; needed to allow modules to add more custom type handling (mostly to support types of non-Java JVM languages)
  - _injectableValues
```
protected InjectableValues _injectableValues
```
    Provider for values to inject in deserialized POJOs.
    
    从以下版本开始:
    
    1.9
  - _serializationConfig
```
protected SerializationConfig _serializationConfig
```
    Configuration object that defines basic global settings for the serialization process
  - _serializerProvider
```
protected SerializerProvider _serializerProvider
```
    Object that manages access to serializers used for serialization, including caching. It is configured with _serializerFactory to allow for constructing custom serializers.
  - _serializerFactory
```
protected SerializerFactory _serializerFactory
```
    Serializer factory used for constructing serializers.
  - _deserializationConfig
```
protected DeserializationConfig _deserializationConfig
```
    Configuration object that defines basic global settings for the serialization process
  - _deserializerProvider
```
protected DeserializerProvider _deserializerProvider
```
    Object that manages access to deserializers used for deserializing JSON content into Java objects, including possible caching of the deserializers. It contains a reference to DeserializerFactory to use for constructing acutal deserializers.
  - _rootDeserializers
```
protected final ConcurrentHashMap<JavaType,JsonDeserializer<Object>> _rootDeserializers
```
    We will use a separate main-level Map for keeping track of root-level deserializers. This is where most succesful cache lookups get resolved. Map will contain resolvers for all kinds of types, including container types: this is different from the component cache which will only cache bean deserializers.
    Given that we don't expect much concurrency for additions (should very quickly converge to zero after startup), let's explicitly define a low concurrency setting.
    Since version 1.5, these may are either "raw" deserializers (when no type information is needed for base type), or type-wrapped deserializers (if it is needed)
- 构造器详细资料
  - ObjectMapper
```
public ObjectMapper()
```
    Default constructor, which will construct the default JsonFactory as necessary, use StdSerializerProvider as its SerializerProvider, and BeanSerializerFactory as its SerializerFactory. This means that it can serialize all standard JDK types, as well as regular Java Beans (based on method names and Jackson-specific annotations), but does not support JAXB annotations.
  - ObjectMapper
```
public ObjectMapper(JsonFactory jf)
```
    Construct mapper that uses specified JsonFactory for constructing necessary JsonParsers and/or JsonGenerators.
  - ObjectMapper
```
@Deprecated
public ObjectMapper(SerializerFactory sf)
```
    已过时。 Use other constructors instead; note that you can just set serializer factory with setSerializerFactory(org.codehaus.jackson.map.SerializerFactory)
    
    Construct mapper that uses specified SerializerFactory for constructing necessary serializers.
  - ObjectMapper
```
public ObjectMapper(JsonFactory jf,
            SerializerProvider sp,
            DeserializerProvider dp)
```
  - ObjectMapper
```
public ObjectMapper(JsonFactory jf,
            SerializerProvider sp,
            DeserializerProvider dp,
            SerializationConfig sconfig,
            DeserializationConfig dconfig)
```
    参数:
    jf - JsonFactory to use: if null, a new MappingJsonFactory will be constructed
    sp - SerializerProvider to use: if null, a StdSerializerProvider will be constructed
    dp - DeserializerProvider to use: if null, a StdDeserializerProvider will be constructed
    sconfig - Serialization configuration to use; if null, basic SerializationConfig will be constructed
    dconfig - Deserialization configuration to use; if null, basic DeserializationConfig will be constructed
- 方法详细资料
  - version
```
public Version version()
```
    Method that will return version information stored in and read from jar that contains this class.
    
    指定者:
    
    version 在接口中 Versioned
    
    从以下版本开始:
    
    1.6
  - registerModule
```
public void registerModule(Module module)
```
    Method for registering a module that can extend functionality provided by this mapper; for example, by adding providers for custom serializers and deserializers.
    
    参数:
    module - Module to register
    从以下版本开始:
    
    1.7
  - withModule
```
public ObjectMapper withModule(Module module)
```
    Fluent-style alternative to registerModule(org.codehaus.jackson.map.Module); functionally equivalent to:
```
  mapper.registerModule(module);
  return mapper;
```
    NOTE: name is unfortunately misleading in suggesting that a new instance might be created (as is the case with most other 'withXxx()' methods for Jackson core objects) -- this is not the case; rather, this is just a variant of registerModule(org.codehaus.jackson.map.Module) but one that returns 'this' (like it should return, but does not for historical reasons).
    从以下版本开始:
    
    1.8
  - getSerializationConfig
```
public SerializationConfig getSerializationConfig()
```
    Method that returns the shared default SerializationConfig object that defines configuration settings for serialization. Returned object is "live" meaning that changes will be used for future serialization operations for this mapper when using mapper's default configuration
  - copySerializationConfig
```
public SerializationConfig copySerializationConfig()
```
    Method that creates a copy of the shared default SerializationConfig object that defines configuration settings for serialization. Since it is a copy, any changes made to the configuration object will NOT directly affect serialization done using basic serialization methods that use the shared object (that is, ones that do not take separate SerializationConfig argument.
    The use case is that of changing object settings of the configuration (like date format being used, see SerializationConfig.setDateFormat(java.text.DateFormat)).
  - setSerializationConfig
```
public ObjectMapper setSerializationConfig(SerializationConfig cfg)
```
    Method for replacing the shared default serialization configuration object.
  - getDeserializationConfig
```
public DeserializationConfig getDeserializationConfig()
```
    Method that returns the shared default DeserializationConfig object that defines configuration settings for deserialization. Returned object is "live" meaning that changes will be used for future deserialization operations for this mapper when using mapper's default configuration
  - copyDeserializationConfig
```
public DeserializationConfig copyDeserializationConfig()
```
    Method that creates a copy of the shared default DeserializationConfig object that defines configuration settings for deserialization. Since it is a copy, any changes made to the configuration object will NOT directly affect deserialization done using basic deserialization methods that use the shared object (that is, ones that do not take separate DeserializationConfig argument.
    The use case is that of changing object settings of the configuration (like deserialization problem handler, see DeserializationConfig.addHandler(org.codehaus.jackson.map.DeserializationProblemHandler))
  - setDeserializationConfig
```
public ObjectMapper setDeserializationConfig(DeserializationConfig cfg)
```
    Method for replacing the shared default deserialization configuration object.
  - setSerializerFactory
```
public ObjectMapper setSerializerFactory(SerializerFactory f)
```
    Method for setting specific SerializerFactory to use for constructing (bean) serializers.
  - setSerializerProvider
```
public ObjectMapper setSerializerProvider(SerializerProvider p)
```
    Method for setting specific SerializerProvider to use for handling caching of JsonSerializer instances.
  - getSerializerProvider
```
public SerializerProvider getSerializerProvider()
```
    从以下版本开始:
    
    1.4
  - setDeserializerProvider
```
public ObjectMapper setDeserializerProvider(DeserializerProvider p)
```
    Method for setting specific DeserializerProvider to use for handling caching of JsonDeserializer instances.
  - getDeserializerProvider
```
public DeserializerProvider getDeserializerProvider()
```
    从以下版本开始:
    
    1.4
  - getVisibilityChecker
```
public VisibilityChecker<?> getVisibilityChecker()
```
    Method for accessing currently configured visibility checker; object used for determining whether given property element (method, field, constructor) can be auto-detected or not.
    
    从以下版本开始:
    
    1.5
  - setVisibilityChecker
```
public void setVisibilityChecker(VisibilityChecker<?> vc)
```
    Method for setting currently configured visibility checker; object used for determining whether given property element (method, field, constructor) can be auto-detected or not. This default checker is used if no per-class overrides are defined.
    
    从以下版本开始:
    
    1.5
  - setVisibility
```
public ObjectMapper setVisibility(JsonMethod forMethod,
                         JsonAutoDetect.Visibility visibility)
```
    Convenience method that allows changing configuration for underlying VisibilityCheckers, to change details of what kinds of properties are auto-detected. Basically short cut for doing:
```
  mapper.setVisibilityChecker(
     mapper.getVisibilityChecker().withVisibility(forMethod, visibility)
  );
```
    one common use case would be to do:
```
  mapper.setVisibility(JsonMethod.FIELD, Visibility.ANY);
```
    which would make all member fields serializable without further annotations, instead of just public fields (default setting).
    参数:
    forMethod - Type of property descriptor affected (field, getter/isGetter, setter, creator)
    visibility - Minimum visibility to require for the property descriptors of type
    
    返回:
    Modified mapper instance (that is, "this"), to allow chaining of configuration calls
    从以下版本开始:
    
    1.9
  - getSubtypeResolver
```
public SubtypeResolver getSubtypeResolver()
```
    Method for accessing subtype resolver in use.
    
    从以下版本开始:
    
    1.6
  - setSubtypeResolver
```
public void setSubtypeResolver(SubtypeResolver r)
```
    Method for setting custom subtype resolver to use.
    
    从以下版本开始:
    
    1.6
  - setAnnotationIntrospector
```
public ObjectMapper setAnnotationIntrospector(AnnotationIntrospector ai)
```
    Method for changing AnnotationIntrospector used by this mapper instance for both serialization and deserialization
    
    从以下版本开始:
    
    1.8
  - setPropertyNamingStrategy
```
public ObjectMapper setPropertyNamingStrategy(PropertyNamingStrategy s)
```
    Method for setting custom property naming strategy to use.
    
    从以下版本开始:
    
    1.8
  - setSerializationInclusion
```
public ObjectMapper setSerializationInclusion(JsonSerialize.Inclusion incl)
```
    Method for setting defalt POJO property inclusion strategy for serialization. Equivalent to:
```
  mapper.setSerializationConfig(mapper.getSerializationConfig().withSerializationInclusion(incl));
```
    从以下版本开始:
    
    1.9
  - enableDefaultTyping
```
public ObjectMapper enableDefaultTyping()
```
    Convenience method that is equivalent to calling
```
  enableObjectTyping(DefaultTyping.OBJECT_AND_NON_CONCRETE);
```
  - enableDefaultTyping
```
public ObjectMapper enableDefaultTyping(ObjectMapper.DefaultTyping dti)
```
    Convenience method that is equivalent to calling
```
  enableObjectTyping(dti, JsonTypeInfo.As.WRAPPER_ARRAY);
```
  - enableDefaultTyping
```
public ObjectMapper enableDefaultTyping(ObjectMapper.DefaultTyping applicability,
                               JsonTypeInfo.As includeAs)
```
    Method for enabling automatic inclusion of type information, needed for proper deserialization of polymorphic types (unless types have been annotated with JsonTypeInfo).
    
    参数:
    applicability - Defines kinds of types for which additional type information is added; see ObjectMapper.DefaultTyping for more information.
  - enableDefaultTypingAsProperty
```
public ObjectMapper enableDefaultTypingAsProperty(ObjectMapper.DefaultTyping applicability,
                                         String propertyName)
```
    Method for enabling automatic inclusion of type information -- needed for proper deserialization of polymorphic types (unless types have been annotated with JsonTypeInfo) -- using "As.PROPERTY" inclusion mechanism and specified property name to use for inclusion (default being "@class" since default type information always uses class name as type identifier)
    
    从以下版本开始:
    
    1.7
  - disableDefaultTyping
```
public ObjectMapper disableDefaultTyping()
```
    Method for disabling automatic inclusion of type information; if so, only explicitly annotated types (ones with JsonTypeInfo) will have additional embedded type information.
  - setDefaultTyping
```
public ObjectMapper setDefaultTyping(TypeResolverBuilder<?> typer)
```
    Method for enabling automatic inclusion of type information, using specified handler object for determining which types this affects, as well as details of how information is embedded.
    
    参数:
    typer - Type information inclusion handler
  - registerSubtypes
```
public void registerSubtypes(Class<?>... classes)
```
    Method for registering specified class as a subtype, so that typename-based resolution can link supertypes to subtypes (as an alternative to using annotations). Type for given class is determined from appropriate annotation; or if missing, default name (unqualified class name)
    
    从以下版本开始:
    
    1.6
  - registerSubtypes
```
public void registerSubtypes(NamedType... types)
```
    Method for registering specified class as a subtype, so that typename-based resolution can link supertypes to subtypes (as an alternative to using annotations). Name may be provided as part of argument, but if not will be based on annotations or use default name (unqualified class name).
    
    从以下版本开始:
    
    1.6
  - getTypeFactory
```
public TypeFactory getTypeFactory()
```
    Accessor for getting currently configured TypeFactory instance.
    
    从以下版本开始:
    
    1.8
  - setTypeFactory
```
public ObjectMapper setTypeFactory(TypeFactory f)
```
    Method that can be used to override TypeFactory instance used by this mapper.
    Note: will also set TypeFactory that deserialization and serialization config objects use.
  - constructType
```
public JavaType constructType(Type t)
```
    Convenience method for constructing JavaType out of given type (typically java.lang.Class), but without explicit context.
    
    从以下版本开始:
    
    1.8
  - setNodeFactory
```
public ObjectMapper setNodeFactory(JsonNodeFactory f)
```
    Method for specifying JsonNodeFactory to use for constructing root level tree nodes (via method createObjectNode()
    
    从以下版本开始:
    
    1.2
  - setFilters
```
public void setFilters(FilterProvider filterProvider)
```
    Convenience method that is equivalent to:
```
  mapper.setFilters(mapper.getSerializationConfig().withFilters(filterProvider));
```
    Note that usually it is better to use method filteredWriter(org.codehaus.jackson.map.ser.FilterProvider); however, sometimes this method is more convenient. For example, some frameworks only allow configuring of ObjectMapper instances and not ObjectWriters.
    从以下版本开始:
    
    1.8
  - getJsonFactory
```
public JsonFactory getJsonFactory()
```
    Method that can be used to get hold of JsonFactory that this mapper uses if it needs to construct JsonParsers and/or JsonGenerators.
    
    返回:
    JsonFactory that this mapper uses when it needs to construct Json parser and generators
  - setDateFormat
```
public void setDateFormat(DateFormat dateFormat)
```
    Method for configuring the default DateFormat to use when serializing time values as Strings, and deserializing from JSON Strings. This is preferably to directly modifying SerializationConfig and DeserializationConfig instances. If you need per-request configuration, use writer(DateFormat) to create properly configured ObjectWriter and use that; this because ObjectWriters are thread-safe whereas ObjectMapper itself is only thread-safe when configuring methods (such as this one) are NOT called.
    
    从以下版本开始:
    
    1.8
  - setHandlerInstantiator
```
public void setHandlerInstantiator(HandlerInstantiator hi)
```
    Method for configuring HandlerInstantiator to use for creating instances of handlers (such as serializers, deserializers, type and type id resolvers), given a class.
    
    参数:
    hi - Instantiator to use; if null, use the default implementation
  - setInjectableValues
```
public ObjectMapper setInjectableValues(InjectableValues injectableValues)
```
    从以下版本开始:
    
    1.9
  - configure
```
public ObjectMapper configure(SerializationConfig.Feature f,
                     boolean state)
```
    Method for changing state of an on/off serialization feature for this object mapper.
    This is method is basically a shortcut method for calling SerializationConfig.set(org.codehaus.jackson.map.SerializationConfig.Feature, boolean) on the shared SerializationConfig object with given arguments.
  - configure
```
public ObjectMapper configure(DeserializationConfig.Feature f,
                     boolean state)
```
    Method for changing state of an on/off deserialization feature for this object mapper.
    This is method is basically a shortcut method for calling DeserializationConfig.set(org.codehaus.jackson.map.DeserializationConfig.Feature, boolean) on the shared DeserializationConfig object with given arguments.
  - configure
```
public ObjectMapper configure(JsonParser.Feature f,
                     boolean state)
```
    Method for changing state of an on/off JsonParser feature for JsonFactory instance this object mapper uses.
    This is method is basically a shortcut method for calling JsonFactory.setParserFeature(org.codehaus.jackson.JsonParser.Feature, boolean) on the shared JsonFactory this mapper uses (which is accessible using getJsonFactory()).
    
    从以下版本开始:
    
    1.2
  - configure
```
public ObjectMapper configure(JsonGenerator.Feature f,
                     boolean state)
```
    Method for changing state of an on/off JsonGenerator feature for JsonFactory instance this object mapper uses.
    This is method is basically a shortcut method for calling JsonFactory.setGeneratorFeature(org.codehaus.jackson.JsonGenerator.Feature, boolean) on the shared JsonFactory this mapper uses (which is accessible using getJsonFactory()).
    
    从以下版本开始:
    
    1.2
  - enable
```
public ObjectMapper enable(DeserializationConfig.Feature... f)
```
    Method for enabling specified DeserializationConfig features. Modifies and returns this instance; no new object is created.
    
    从以下版本开始:
    
    1.9
  - disable
```
public ObjectMapper disable(DeserializationConfig.Feature... f)
```
    Method for enabling specified DeserializationConfig features. Modifies and returns this instance; no new object is created.
    
    从以下版本开始:
    
    1.9
  - enable
```
public ObjectMapper enable(SerializationConfig.Feature... f)
```
    Method for enabling specified DeserializationConfig features. Modifies and returns this instance; no new object is created.
    
    从以下版本开始:
    
    1.9
  - disable
```
public ObjectMapper disable(SerializationConfig.Feature... f)
```
    Method for enabling specified DeserializationConfig features. Modifies and returns this instance; no new object is created.
    
    从以下版本开始:
    
    1.9
  - isEnabled
```
public boolean isEnabled(SerializationConfig.Feature f)
```
    Convenience method, equivalent to:
```
  getSerializationConfig().isEnabled(f);
```
    从以下版本开始:
    
    1.9
  - isEnabled
```
public boolean isEnabled(DeserializationConfig.Feature f)
```
    Convenience method, equivalent to:
```
  getDeserializationConfig().isEnabled(f);
```
    从以下版本开始:
    
    1.9
  - isEnabled
```
public boolean isEnabled(JsonParser.Feature f)
```
    Convenience method, equivalent to:
```
  getJsonFactory().isEnabled(f);
```
    从以下版本开始:
    
    1.9
  - isEnabled
```
public boolean isEnabled(JsonGenerator.Feature f)
```
    Convenience method, equivalent to:
```
  getJsonFactory().isEnabled(f);
```
    从以下版本开始:
    
    1.9
  - getNodeFactory
```
public JsonNodeFactory getNodeFactory()
```
    Method that can be used to get hold of JsonNodeFactory that this mapper will use when directly constructing root JsonNode instances for Trees.
    Note: this is just a shortcut for calling
```
   getDeserializationConfig().getNodeFactory()
```
    从以下版本开始:
    
    1.2
  - readValue
```
public <T> T readValue(JsonParser jp,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Method to deserialize JSON content into a non-container type (it can be an array type, however): typically a bean, array or a wrapper type (like Boolean).
    Note: this method should NOT be used if the result type is a container (Collection or Map. The reason is that due to type erasure, key and value types can not be introspected when using this method.
    
    指定者:
    
    readValue 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(JsonParser jp,
              TypeReference<?> valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Method to deserialize JSON content into a Java type, reference to which is passed as argument. Type is passed using so-called "super type token" (see ) and specifically needs to be used if the root type is a parameterized (generic) container type.
    
    指定者:
    
    readValue 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(JsonParser jp,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Method to deserialize JSON content into a Java type, reference to which is passed as argument. Type is passed using Jackson specific type; instance of which can be constructed using TypeFactory.
    
    指定者:
    
    readValue 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readTree
```
public JsonNode readTree(JsonParser jp)
                  throws IOException,
                         JsonProcessingException
```
    Method to deserialize JSON content as tree expressed using set of JsonNode instances. Returns root of the resulting tree (where root can consist of just a single node if the current event is a value event, not container).
    
    指定者:
    
    readTree 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonProcessingException
  - readValues
```
public <T> MappingIterator<T> readValues(JsonParser jp,
                                JavaType valueType)
                              throws IOException,
                                     JsonProcessingException
```
    Method for reading sequence of Objects from parser stream.
    Note that ObjectReader has more complete set of variants.
    
    指定者:
    
    readValues 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.8
  - readValues
```
public <T> MappingIterator<T> readValues(JsonParser jp,
                                Class<T> valueType)
                              throws IOException,
                                     JsonProcessingException
```
    Method for reading sequence of Objects from parser stream.
    
    指定者:
    
    readValues 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.8
  - readValues
```
public <T> MappingIterator<T> readValues(JsonParser jp,
                                TypeReference<?> valueTypeRef)
                              throws IOException,
                                     JsonProcessingException
```
    Method for reading sequence of Objects from parser stream.
    
    指定者:
    
    readValues 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.8
  - readValue
```
public <T> T readValue(JsonParser jp,
              Class<T> valueType,
              DeserializationConfig cfg)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Method to deserialize JSON content into a non-container type (it can be an array type, however): typically a bean, array or a wrapper type (like Boolean).
    Note: this method should NOT be used if the result type is a container (Collection or Map. The reason is that due to type erasure, key and value types can not be introspected when using this method.
    
    参数:
    cfg - Specific deserialization configuration to use for this operation. Note that not all config settings can be changed on per-operation basis: some changeds only take effect before calling the operation for the first time (for the mapper instance)
    
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.1
  - readValue
```
public <T> T readValue(JsonParser jp,
              TypeReference<?> valueTypeRef,
              DeserializationConfig cfg)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Method to deserialize JSON content into a Java type, reference to which is passed as argument. Type is passed using so-called "super type token" (see ) and specifically needs to be used if the root type is a parameterized (generic) container type.
    
    参数:
    cfg - Specific deserialization configuration to use for this operation. Note that not all config settings can be changed on per-operation basis: some changeds only take effect before calling the operation for the first time (for the mapper instance)
    
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.1
  - readValue
```
public <T> T readValue(JsonParser jp,
              JavaType valueType,
              DeserializationConfig cfg)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Method to deserialize JSON content into a Java type, reference to which is passed as argument. Type is passed using Jackson specific type; instance of which can be constructed using TypeFactory.
    
    参数:
    cfg - Specific deserialization configuration to use for this operation. Note that not all config settings can be changed on per-operation basis: some changeds only take effect before calling the operation for the first time (for the mapper instance)
    
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.1
  - readTree
```
public JsonNode readTree(JsonParser jp,
                DeserializationConfig cfg)
                  throws IOException,
                         JsonProcessingException
```
    Method to deserialize JSON content as tree expressed using set of JsonNode instances. Returns root of the resulting tree (where root can consist of just a single node if the current event is a value event, not container).
    
    参数:
    cfg - Specific deserialization configuration to use for this operation. Note that not all config settings can be changed on per-operation basis: some changeds only take effect before calling the operation for the first time (for the mapper instance)
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.1
  - readTree
```
public JsonNode readTree(InputStream in)
                  throws IOException,
                         JsonProcessingException
```
    Method to deserialize JSON content as tree expressed using set of JsonNode instances. Returns root of the resulting tree (where root can consist of just a single node if the current event is a value event, not container).
    
    参数:
    in - Input stream used to read JSON content for building the JSON tree.
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.3
  - readTree
```
public JsonNode readTree(Reader r)
                  throws IOException,
                         JsonProcessingException
```
    Method to deserialize JSON content as tree expressed using set of JsonNode instances. Returns root of the resulting tree (where root can consist of just a single node if the current event is a value event, not container).
    
    参数:
    r - Reader used to read JSON content for building the JSON tree.
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.3
  - readTree
```
public JsonNode readTree(String content)
                  throws IOException,
                         JsonProcessingException
```
    Method to deserialize JSON content as tree expressed using set of JsonNode instances. Returns root of the resulting tree (where root can consist of just a single node if the current event is a value event, not container).
    
    参数:
    content - JSON content to parse to build the JSON tree.
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.3
  - readTree
```
public JsonNode readTree(byte[] content)
                  throws IOException,
                         JsonProcessingException
```
    Method to deserialize JSON content as tree expressed using set of JsonNode instances. Returns root of the resulting tree (where root can consist of just a single node if the current event is a value event, not container).
    
    参数:
    content - JSON content to parse to build the JSON tree.
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.9
  - readTree
```
public JsonNode readTree(File file)
                  throws IOException,
                         JsonProcessingException
```
    Method to deserialize JSON content as tree expressed using set of JsonNode instances. Returns root of the resulting tree (where root can consist of just a single node if the current event is a value event, not container).
    
    参数:
    file - File of which contents to parse as JSON for building a tree instance
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.9
  - readTree
```
public JsonNode readTree(URL source)
                  throws IOException,
                         JsonProcessingException
```
    Method to deserialize JSON content as tree expressed using set of JsonNode instances. Returns root of the resulting tree (where root can consist of just a single node if the current event is a value event, not container).
    
    参数:
    source - URL to use for fetching contents to parse as JSON for building a tree instance
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.9
  - writeValue
```
public void writeValue(JsonGenerator jgen,
              Object value)
                throws IOException,
                       JsonGenerationException,
                       JsonMappingException
```
    Method that can be used to serialize any Java value as JSON output, using provided JsonGenerator.
    
    指定者:
    
    writeValue 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
  - writeValue
```
public void writeValue(JsonGenerator jgen,
              Object value,
              SerializationConfig config)
                throws IOException,
                       JsonGenerationException,
                       JsonMappingException
```
    Method that can be used to serialize any Java value as JSON output, using provided JsonGenerator, configured as per passed configuration object.
    
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
    从以下版本开始:
    
    1.1
  - writeTree
```
public void writeTree(JsonGenerator jgen,
             JsonNode rootNode)
               throws IOException,
                      JsonProcessingException
```
    Method to serialize given JSON Tree, using generator provided.
    
    指定者:
    
    writeTree 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonProcessingException
  - writeTree
```
public void writeTree(JsonGenerator jgen,
             JsonNode rootNode,
             SerializationConfig cfg)
               throws IOException,
                      JsonProcessingException
```
    Method to serialize given Json Tree, using generator provided.
    
    抛出:
    
    IOException
    
    JsonProcessingException
    从以下版本开始:
    
    1.1
  - createObjectNode
```
public ObjectNode createObjectNode()
```
    Note: return type is co-variant, as basic ObjectCodec abstraction can not refer to concrete node types (as it's part of core package, whereas impls are part of mapper package)
    
    指定者:
    
    createObjectNode 在类中 ObjectCodec
    
    从以下版本开始:
    
    1.2
  - createArrayNode
```
public ArrayNode createArrayNode()
```
    Note: return type is co-variant, as basic ObjectCodec abstraction can not refer to concrete node types (as it's part of core package, whereas impls are part of mapper package)
    
    指定者:
    
    createArrayNode 在类中 ObjectCodec
    
    从以下版本开始:
    
    1.2
  - treeAsTokens
```
public JsonParser treeAsTokens(JsonNode n)
```
    Method for constructing a JsonParser out of JSON tree representation.
    
    指定者:
    
    treeAsTokens 在类中 ObjectCodec
    
    参数:
    n - Root node of the tree that resulting parser will read from
    从以下版本开始:
    
    1.3
  - treeToValue
```
public <T> T treeToValue(JsonNode n,
                Class<T> valueType)
              throws IOException,
                     JsonParseException,
                     JsonMappingException
```
    Convenience conversion method that will bind data given JSON tree contains into specific value (usually bean) type.
    Equivalent to:
```
   objectMapper.convertValue(n, valueClass);
```
    指定者:
    
    treeToValue 在类中 ObjectCodec
    
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - valueToTree
```
public <T extends JsonNode> T valueToTree(Object fromValue)
                               throws IllegalArgumentException
```
    Reverse of treeToValue(org.codehaus.jackson.JsonNode, java.lang.Class<T>); given a value (usually bean), will construct equivalent JSON Tree representation. Functionally same as if serializing value into JSON and parsing JSON as tree, but more efficient.
    
    类型参数:
    T - Actual node type; usually either basic JsonNode or ObjectNode
    参数:
    fromValue - Bean value to convert
    
    返回:
    Root node of the resulting JSON tree
    
    抛出:
    
    IllegalArgumentException
    从以下版本开始:
    
    1.6
  - canSerialize
```
public boolean canSerialize(Class<?> type)
```
    Method that can be called to check whether mapper thinks it could serialize an instance of given Class. Check is done by checking whether a serializer can be found for the type.
    
    返回:
    True if mapper can find a serializer for instances of given class (potentially serializable), false otherwise (not serializable)
  - canDeserialize
```
public boolean canDeserialize(JavaType type)
```
    Method that can be called to check whether mapper thinks it could deserialize an Object of given type. Check is done by checking whether a deserializer can be found for the type.
    
    返回:
    True if mapper can find a serializer for instances of given class (potentially serializable), false otherwise (not serializable)
  - readValue
```
public <T> T readValue(File src,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(File src,
              TypeReference valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(File src,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(URL src,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(URL src,
              TypeReference valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(URL src,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(String content,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(String content,
              TypeReference valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(String content,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(Reader src,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(Reader src,
              TypeReference valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(Reader src,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(InputStream src,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(InputStream src,
              TypeReference valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(InputStream src,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(byte[] src,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.8
  - readValue
```
public <T> T readValue(byte[] src,
              int offset,
              int len,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(byte[] src,
              TypeReference valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.8
  - readValue
```
public <T> T readValue(byte[] src,
              int offset,
              int len,
              TypeReference valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(byte[] src,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.8
  - readValue
```
public <T> T readValue(byte[] src,
              int offset,
              int len,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - readValue
```
public <T> T readValue(JsonNode root,
              Class<T> valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Convenience method for converting results from given JSON tree into given value type. Basically short-cut for:
```
   mapper.readValue(mapper.treeAsTokens(root), valueType);
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.6
  - readValue
```
public <T> T readValue(JsonNode root,
              TypeReference valueTypeRef)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Convenience method for converting results from given JSON tree into given value type. Basically short-cut for:
```
   mapper.readValue(mapper.treeAsTokens(root), valueType);
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.6
  - readValue
```
public <T> T readValue(JsonNode root,
              JavaType valueType)
            throws IOException,
                   JsonParseException,
                   JsonMappingException
```
    Convenience method for converting results from given JSON tree into given value type. Basically short-cut for:
```
   mapper.readValue(mapper.treeAsTokens(root), valueType);
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
    从以下版本开始:
    
    1.6
  - writeValue
```
public void writeValue(File resultFile,
              Object value)
                throws IOException,
                       JsonGenerationException,
                       JsonMappingException
```
    Method that can be used to serialize any Java value as JSON output, written to File provided.
    
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
  - writeValue
```
public void writeValue(OutputStream out,
              Object value)
                throws IOException,
                       JsonGenerationException,
                       JsonMappingException
```
    Method that can be used to serialize any Java value as JSON output, using output stream provided (using encoding JsonEncoding.UTF8).
    Note: method does not close the underlying stream explicitly here; however, JsonFactory this mapper uses may choose to close the stream depending on its settings (by default, it will try to close it when JsonGenerator we construct is closed).
    
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
  - writeValue
```
public void writeValue(Writer w,
              Object value)
                throws IOException,
                       JsonGenerationException,
                       JsonMappingException
```
    Method that can be used to serialize any Java value as JSON output, using Writer provided.
    Note: method does not close the underlying stream explicitly here; however, JsonFactory this mapper uses may choose to close the stream depending on its settings (by default, it will try to close it when JsonGenerator we construct is closed).
    
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
  - writeValueAsString
```
public String writeValueAsString(Object value)
                          throws IOException,
                                 JsonGenerationException,
                                 JsonMappingException
```
    Method that can be used to serialize any Java value as a String. Functionally equivalent to calling writeValue(Writer,Object) with StringWriter and constructing String, but more efficient.
    
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
    从以下版本开始:
    
    1.3
  - writeValueAsBytes
```
public byte[] writeValueAsBytes(Object value)
                         throws IOException,
                                JsonGenerationException,
                                JsonMappingException
```
    Method that can be used to serialize any Java value as a byte array. Functionally equivalent to calling writeValue(Writer,Object) with ByteArrayOutputStream and getting bytes, but more efficient. Encoding used will be UTF-8.
    
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
    从以下版本开始:
    
    1.5
  - writer
```
public ObjectWriter writer()
```
    Convenience method for constructing ObjectWriter with default settings.
    
    从以下版本开始:
    
    1.6
  - writer
```
public ObjectWriter writer(DateFormat df)
```
    Factory method for constructing ObjectWriter that will serialize objects using specified DateFormat; or, if null passed, using timestamp (64-bit number.
    
    从以下版本开始:
    
    1.9
  - writerWithView
```
public ObjectWriter writerWithView(Class<?> serializationView)
```
    Factory method for constructing ObjectWriter that will serialize objects using specified JSON View (filter).
    
    从以下版本开始:
    
    1.9
  - writerWithType
```
public ObjectWriter writerWithType(Class<?> rootType)
```
    Factory method for constructing ObjectWriter that will serialize objects using specified root type, instead of actual runtime type of value. Type must be a super-type of runtime type.
    
    从以下版本开始:
    
    1.9
  - writerWithType
```
public ObjectWriter writerWithType(JavaType rootType)
```
    Factory method for constructing ObjectWriter that will serialize objects using specified root type, instead of actual runtime type of value. Type must be a super-type of runtime type.
    
    从以下版本开始:
    
    1.9
  - writerWithType
```
public ObjectWriter writerWithType(TypeReference<?> rootType)
```
    Factory method for constructing ObjectWriter that will serialize objects using specified root type, instead of actual runtime type of value. Type must be a super-type of runtime type.
    
    从以下版本开始:
    
    1.9
  - writer
```
public ObjectWriter writer(PrettyPrinter pp)
```
    Factory method for constructing ObjectWriter that will serialize objects using specified pretty printer for indentation (or if null, no pretty printer)
    
    从以下版本开始:
    
    1.9
  - writerWithDefaultPrettyPrinter
```
public ObjectWriter writerWithDefaultPrettyPrinter()
```
    Factory method for constructing ObjectWriter that will serialize objects using the default pretty printer for indentation
    
    从以下版本开始:
    
    1.9
  - writer
```
public ObjectWriter writer(FilterProvider filterProvider)
```
    Factory method for constructing ObjectWriter that will serialize objects using specified filter provider.
    
    从以下版本开始:
    
    1.9
  - writer
```
public ObjectWriter writer(FormatSchema schema)
```
    Factory method for constructing ObjectWriter that will pass specific schema object to JsonGenerator used for writing content.
    
    参数:
    schema - Schema to pass to generator
    从以下版本开始:
    
    1.9
  - typedWriter
```
@Deprecated
public ObjectWriter typedWriter(Class<?> rootType)
```
    已过时。 Since 1.9, use writerWithType(Class) instead.
  - typedWriter
```
@Deprecated
public ObjectWriter typedWriter(JavaType rootType)
```
    已过时。 Since 1.9, use writerWithType(JavaType) instead.
  - typedWriter
```
@Deprecated
public ObjectWriter typedWriter(TypeReference<?> rootType)
```
    已过时。 Since 1.9, use writerWithType(TypeReference) instead.
  - viewWriter
```
@Deprecated
public ObjectWriter viewWriter(Class<?> serializationView)
```
    已过时。 Since 1.9, use writerWithView(Class) instead.
  - prettyPrintingWriter
```
@Deprecated
public ObjectWriter prettyPrintingWriter(PrettyPrinter pp)
```
    已过时。 Since 1.9, use writer(FilterProvider) instead.
  - defaultPrettyPrintingWriter
```
@Deprecated
public ObjectWriter defaultPrettyPrintingWriter()
```
    已过时。 Since 1.9, use writerWithDefaultPrettyPrinter() instead.
  - filteredWriter
```
@Deprecated
public ObjectWriter filteredWriter(FilterProvider filterProvider)
```
    已过时。 Since 1.9, use writer(FilterProvider) instead.
  - schemaBasedWriter
```
@Deprecated
public ObjectWriter schemaBasedWriter(FormatSchema schema)
```
    已过时。 Since 1.9, use writer(FilterProvider) instead.
  - reader
```
public ObjectReader reader()
```
    Factory method for constructing ObjectReader with default settings. Note that the resulting instance is NOT usable as is, without defining expected value type.
    
    从以下版本开始:
    
    1.6
  - readerForUpdating
```
public ObjectReader readerForUpdating(Object valueToUpdate)
```
    Factory method for constructing ObjectReader that will update given Object (usually Bean, but can be a Collection or Map as well, but NOT an array) with JSON data. Deserialization occurs normally except that the root-level value in JSON is not used for instantiating a new object; instead give updateable object is used as root. Runtime type of value object is used for locating deserializer, unless overridden by other factory methods of ObjectReader
    
    从以下版本开始:
    
    1.9
  - reader
```
public ObjectReader reader(JavaType type)
```
    Factory method for constructing ObjectReader that will read or update instances of specified type
    
    从以下版本开始:
    
    1.6
  - reader
```
public ObjectReader reader(Class<?> type)
```
    Factory method for constructing ObjectReader that will read or update instances of specified type
    
    从以下版本开始:
    
    1.6
  - reader
```
public ObjectReader reader(TypeReference<?> type)
```
    Factory method for constructing ObjectReader that will read or update instances of specified type
    
    从以下版本开始:
    
    1.6
  - reader
```
public ObjectReader reader(JsonNodeFactory f)
```
    Factory method for constructing ObjectReader that will use specified JsonNodeFactory for constructing JSON trees.
    
    从以下版本开始:
    
    1.6
  - reader
```
public ObjectReader reader(FormatSchema schema)
```
    Factory method for constructing ObjectReader that will pass specific schema object to JsonParser used for reading content.
    
    参数:
    schema - Schema to pass to parser
    从以下版本开始:
    
    1.8
  - reader
```
public ObjectReader reader(InjectableValues injectableValues)
```
    Factory method for constructing ObjectReader that will use specified injectable values.
    
    参数:
    injectableValues - Injectable values to use
    从以下版本开始:
    
    1.9
  - updatingReader
```
@Deprecated
public ObjectReader updatingReader(Object valueToUpdate)
```
    已过时。 Since 1.9, use readerForUpdating(java.lang.Object) instead.
  - schemaBasedReader
```
@Deprecated
public ObjectReader schemaBasedReader(FormatSchema schema)
```
    已过时。 Since 1.9, use reader(FormatSchema) instead.
  - convertValue
```
public <T> T convertValue(Object fromValue,
                 Class<T> toValueType)
               throws IllegalArgumentException
```
    Convenience method for doing two-step conversion from given value, into instance of given value type. This is functionality equivalent to first serializing given value into JSON, then binding JSON data into value of given type, but may be executed without fully serializing into JSON. Same converters (serializers, deserializers) will be used as for data binding, meaning same object mapper configuration works.
    
    抛出:
    
    IllegalArgumentException - If conversion fails due to incompatible type; if so, root cause will contain underlying checked exception data binding functionality threw
  - convertValue
```
public <T> T convertValue(Object fromValue,
                 TypeReference toValueTypeRef)
               throws IllegalArgumentException
```
    抛出:
    
    IllegalArgumentException
  - convertValue
```
public <T> T convertValue(Object fromValue,
                 JavaType toValueType)
               throws IllegalArgumentException
```
    抛出:
    
    IllegalArgumentException
  - _convert
```
protected Object _convert(Object fromValue,
              JavaType toValueType)
                   throws IllegalArgumentException
```
    抛出:
    
    IllegalArgumentException
  - generateJsonSchema
```
public JsonSchema generateJsonSchema(Class<?> t)
                              throws JsonMappingException
```
    Generate Json-schema instance for specified class.
    
    参数:
    t - The class to generate schema for
    
    返回:
    Constructed JSON schema.
    
    抛出:
    
    JsonMappingException
  - generateJsonSchema
```
public JsonSchema generateJsonSchema(Class<?> t,
                            SerializationConfig cfg)
                              throws JsonMappingException
```
    Generate Json-schema instance for specified class, using specific serialization configuration
    
    参数:
    t - The class to generate schema for
    
    返回:
    Constructed JSON schema.
    
    抛出:
    
    JsonMappingException
  - _defaultPrettyPrinter
```
protected PrettyPrinter _defaultPrettyPrinter()
```
    Helper method that should return default pretty-printer to use for generators constructed by this mapper, when instructed to use default pretty printer.
    
    从以下版本开始:
    
    1.7
  - _configAndWriteValue
```
protected final void _configAndWriteValue(JsonGenerator jgen,
                        Object value)
                                   throws IOException,
                                          JsonGenerationException,
                                          JsonMappingException
```
    Method called to configure the generator as necessary and then call write functionality
    
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
  - _configAndWriteValue
```
protected final void _configAndWriteValue(JsonGenerator jgen,
                        Object value,
                        Class<?> viewClass)
                                   throws IOException,
                                          JsonGenerationException,
                                          JsonMappingException
```
    抛出:
    
    IOException
    
    JsonGenerationException
    
    JsonMappingException
  - _readValue
```
protected Object _readValue(DeserializationConfig cfg,
                JsonParser jp,
                JavaType valueType)
                     throws IOException,
                            JsonParseException,
                            JsonMappingException
```
    Actual implementation of value reading+binding operation.
    
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - _readMapAndClose
```
protected Object _readMapAndClose(JsonParser jp,
                      JavaType valueType)
                           throws IOException,
                                  JsonParseException,
                                  JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - _initForReading
```
protected JsonToken _initForReading(JsonParser jp)
                             throws IOException,
                                    JsonParseException,
                                    JsonMappingException
```
    Method called to ensure that given parser is ready for reading content for data binding.
    
    返回:
    First token to be used for data binding after this call: can never be null as exception will be thrown if parser can not provide more tokens.
    
    抛出:
    
    IOException - if the underlying input source has problems during parsing
    
    JsonParseException - if parser has problems parsing content
    
    JsonMappingException - if the parser does not have any more content to map (note: Json "null" value is considered content; enf-of-stream not)
  - _unwrapAndDeserialize
```
protected Object _unwrapAndDeserialize(JsonParser jp,
                           JavaType rootType,
                           DeserializationContext ctxt,
                           JsonDeserializer<Object> deser)
                                throws IOException,
                                       JsonParseException,
                                       JsonMappingException
```
    抛出:
    
    IOException
    
    JsonParseException
    
    JsonMappingException
  - _findRootDeserializer
```
protected JsonDeserializer<Object> _findRootDeserializer(DeserializationConfig cfg,
                                             JavaType valueType)
                                                  throws JsonMappingException
```
    Method called to locate deserializer for the passed root-level value.
    
    抛出:
    
    JsonMappingException
  - _createDeserializationContext
```
protected DeserializationContext _createDeserializationContext(JsonParser jp,
                                                   DeserializationConfig cfg)
```

类 ObjectMapper

嵌套类概要

字段概要

构造器概要

方法概要

从类继承的方法 java.lang.Object

字段详细资料

DEFAULT_INTROSPECTOR

DEFAULT_ANNOTATION_INTROSPECTOR

STD_VISIBILITY_CHECKER

_jsonFactory

_subtypeResolver

_typeFactory

_injectableValues

_serializationConfig

_serializerProvider

_serializerFactory

_deserializationConfig

_deserializerProvider

_rootDeserializers

构造器详细资料

ObjectMapper

ObjectMapper

ObjectMapper

ObjectMapper

ObjectMapper

方法详细资料

version

registerModule

withModule

getSerializationConfig

copySerializationConfig

setSerializationConfig

getDeserializationConfig

copyDeserializationConfig

setDeserializationConfig

setSerializerFactory

setSerializerProvider

getSerializerProvider

setDeserializerProvider

getDeserializerProvider

getVisibilityChecker

setVisibilityChecker

setVisibility

getSubtypeResolver

setSubtypeResolver

setAnnotationIntrospector

setPropertyNamingStrategy

setSerializationInclusion

enableDefaultTyping

enableDefaultTyping

enableDefaultTyping

enableDefaultTypingAsProperty

disableDefaultTyping

setDefaultTyping

registerSubtypes

registerSubtypes

getTypeFactory

setTypeFactory

constructType

setNodeFactory

setFilters

getJsonFactory

setDateFormat

setHandlerInstantiator

setInjectableValues

configure

configure

configure

configure

enable

disable

enable

disable

isEnabled

isEnabled

isEnabled

isEnabled

getNodeFactory

readValue