org.codehaus.jackson

类 Base64Variants

java.lang.Object

org.codehaus.jackson.Base64Variants

public final class Base64Variants
extends Object

Container for commonly used Base64 variants.

作者:

Tatu Saloranta

字段概要

字段

限定符和类型	字段和说明
static Base64Variant	MIME This variant is what most people would think of "the standard" Base64 encoding.
static Base64Variant	MIME_NO_LINEFEEDS Slightly non-standard modification of MIME which does not use linefeeds (max line length set to infinite).
static Base64Variant	MODIFIED_FOR_URL This non-standard variant is usually used when encoded data needs to be passed via URLs (such as part of GET request).
static Base64Variant	PEM This variant is the one that predates MIME: it is otherwise identical, except that it mandates shorter line length.

构造器概要

构造器

构造器和说明
Base64Variants()

方法概要

方法

限定符和类型	方法和说明
static Base64Variant	getDefaultVariant() Method used to get the default variant ("MIME_NO_LINEFEEDS") for cases where caller does not explicitly specify the variant.

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

MIME

public static final Base64Variant MIME

This variant is what most people would think of "the standard" Base64 encoding.

See wikipedia Base64 entry for details.

Note that although this can be thought of as the standard variant, it is not the default for Jackson: no-linefeeds alternative is because of JSON requirement of escaping all linefeeds.

MIME_NO_LINEFEEDS

public static final Base64Variant MIME_NO_LINEFEEDS

Slightly non-standard modification of MIME which does not use linefeeds (max line length set to infinite). Useful when linefeeds wouldn't work well (possibly in attributes), or for minor space savings (save 1 linefeed per 76 data chars, ie. ~1.4% savings).

PEM

public static final Base64Variant PEM

This variant is the one that predates MIME: it is otherwise identical, except that it mandates shorter line length.

MODIFIED_FOR_URL

public static final Base64Variant MODIFIED_FOR_URL

This non-standard variant is usually used when encoded data needs to be passed via URLs (such as part of GET request). It differs from the base MIME variant in multiple ways. First, no padding is used: this also means that it generally can not be written in multiple separate but adjacent chunks (which would not be the usual use case in any case). Also, no linefeeds are used (max line length set to infinite). And finally, two characters (plus and slash) that would need quoting in URLs are replaced with more optimal alternatives (hyphen and underscore, respectively).

构造器详细资料

Base64Variants

public Base64Variants()

方法详细资料

getDefaultVariant

public static Base64Variant getDefaultVariant()

Method used to get the default variant ("MIME_NO_LINEFEEDS") for cases where caller does not explicitly specify the variant. We will prefer no-linefeed version because linefeeds in JSON values must be escaped, making linefeed-containing variants sub-optimal.