com.alibaba.nacos.common.codec

类 Base64

java.lang.Object

com.alibaba.nacos.common.codec.Base64

public class Base64
extends Object

From apache common codec, and remove some useless method. Provides Base64 encoding and decoding as defined by RFC 2045.

This class implements section 6.8. Base64 Content-Transfer-Encoding from RFC 2045 Multipurpose Internet Mail Extensions (MIME) Part One: Format of Internet Message Bodies by Freed and Borenstein.

The class can be parameterized in the following manner with various constructors:

• URL-safe mode: Default off.
• Line length: Default 76. Line length that aren't multiples of 4 will still essentially end up being multiples of 4 in the encoded data.
• Line separator: Default is CRLF ("\r\n")

Since this class operates directly on byte streams, and not character streams, it is hard-coded to only encode/decode character encodings which are compatible with the lower 127 ASCII chart (ISO-8859-1, Windows-1252, UTF-8, etc).

This class is not thread-safe. Each thread should use its own instance.

从以下版本开始:

1.0

版本:

$Revision: 1080712 $

作者:

Apache Software Foundation

另请参阅:

RFC 2045

构造器概要

构造器

构造器和说明
Base64() Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.

方法概要

限定符和类型	方法和说明
static byte[]	decodeBase64(byte[] base64Data) Decodes Base64 data into octets.
static byte[]	encodeBase64(byte[] binaryData) Encodes binary data using the base64 algorithm but does not chunk the output.
static byte[]	encodeBase64(byte[] binaryData, boolean isChunked, boolean urlSafe, int maxResultSize) Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.

从类继承的方法 java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

构造器详细资料

Base64

public Base64()

Creates a Base64 codec used for decoding (all modes) and encoding in URL-unsafe mode.

When encoding the line length is 0 (no chunking), and the encoding table is STANDARD_ENCODE_TABLE.

When decoding all variants are supported.

方法详细资料

encodeBase64

public static byte[] encodeBase64(byte[] binaryData)

Encodes binary data using the base64 algorithm but does not chunk the output.

参数:

binaryData - binary data to encode

返回:

byte[] containing Base64 characters in their UTF-8 representation.

encodeBase64

public static byte[] encodeBase64(byte[] binaryData,
                                  boolean isChunked,
                                  boolean urlSafe,
                                  int maxResultSize)

Encodes binary data using the base64 algorithm, optionally chunking the output into 76 character blocks.

参数:

binaryData - Array containing binary data to encode.

isChunked - if true this encoder will chunk the base64 output into 76 character blocks

urlSafe - if true this encoder will emit - and _ instead of the usual + and / characters.

maxResultSize - The maximum result size to accept.

返回:

Base64-encoded data.

抛出:

IllegalArgumentException - Thrown when the input array needs an output array bigger than maxResultSize

从以下版本开始:

1.4

decodeBase64

public static byte[] decodeBase64(byte[] base64Data)

Decodes Base64 data into octets.

参数:

base64Data - Byte array containing Base64 data

返回:

Array containing decoded data.