org.skfiy.util

类 Base64

java.lang.Object

org.skfiy.util.Base64

public class Base64
extends Object

Base64 encoding and decoding utility methods, both for binary and textual informations.

从以下版本开始:

1.1

版本:

1.3

作者:

Carlo Pelliccia

构造器概要

构造器

构造器和说明
Base64()

方法概要

方法

限定符和类型	方法和说明
static byte[]	decode(byte[] bytes) Decodes a binary sequence.
static void	decode(File source, File target) Decodes data from the given source file contents and writes them in the given target file.
static void	decode(InputStream inputStream, OutputStream outputStream) Decodes data from the given input stream and writes them in the given output stream.
static String	decode(String str) Decodes the supplied string.
static String	decode(String str, String charset) Decodes the supplied string.
static byte[]	encode(byte[] bytes) Encodes a binary sequence.
static byte[]	encode(byte[] bytes, int wrapAt) Encodes a binary sequence, wrapping every encoded line every wrapAt characters.
static void	encode(File source, File target) Encodes data from the given source file contents and writes them in the given target file.
static void	encode(File source, File target, int wrapAt) Encodes data from the given source file contents and writes them in the given target file, wrapping every encoded line every wrapAt characters.
static void	encode(InputStream inputStream, OutputStream outputStream) Encodes data from the given input stream and writes them in the given output stream.
static void	encode(InputStream inputStream, OutputStream outputStream, int wrapAt) Encodes data from the given input stream and writes them in the given output stream, wrapping every encoded line every wrapAt characters.
static String	encode(String str) Encodes a string.
static String	encode(String str, String charset) Encodes a string.

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()

方法详细资料

encode

public static String encode(String str)
                     throws RuntimeException

Encodes a string.

Before the string is encoded in Base64, it is converted in a binary sequence using the system default charset.

参数:

str - The source string.

返回:

The encoded string.

抛出:

RuntimeException - If an unexpected error occurs.

encode

public static String encode(String str,
            String charset)
                     throws RuntimeException

Encodes a string.

Before the string is encoded in Base64, it is converted in a binary sequence using the supplied charset.

参数:

str - The source string

charset - The charset name.

返回:

The encoded string.

抛出:

RuntimeException - If an unexpected error occurs.

从以下版本开始:

1.2

decode

public static String decode(String str)
                     throws RuntimeException

Decodes the supplied string.

The supplied string is decoded into a binary sequence, and then the sequence is encoded with the system default charset and returned.

参数:

str - The encoded string.

返回:

The decoded string.

抛出:

RuntimeException - If an unexpected error occurs.

decode

public static String decode(String str,
            String charset)
                     throws RuntimeException

Decodes the supplied string.

The supplied string is decoded into a binary sequence, and then the sequence is encoded with the supplied charset and returned.

参数:

str - The encoded string.

charset - The charset name.

返回:

The decoded string.

抛出:

RuntimeException - If an unexpected error occurs.

从以下版本开始:

1.2

encode

public static byte[] encode(byte[] bytes)
                     throws RuntimeException

Encodes a binary sequence.

If data are large, i.e. if you are working with large binary files, consider to use a Base64OutputStream instead of loading too much data in memory.

参数:

bytes - The source sequence.

返回:

The encoded sequence.

抛出:

RuntimeException - If an unexpected error occurs.

从以下版本开始:

1.2

encode

public static byte[] encode(byte[] bytes,
            int wrapAt)
                     throws RuntimeException

Encodes a binary sequence, wrapping every encoded line every wrapAt characters. A wrapAt value less than 1 disables wrapping.

If data are large, i.e. if you are working with large binary files, consider to use a Base64OutputStream instead of loading too much data in memory.

参数:

bytes - The source sequence.

wrapAt - The max line length for encoded data. If less than 1 no wrap is applied.

返回:

The encoded sequence.

抛出:

RuntimeException - If an unexpected error occurs.

从以下版本开始:

1.2

decode

public static byte[] decode(byte[] bytes)
                     throws RuntimeException

Decodes a binary sequence.

If data are large, i.e. if you are working with large binary files, consider to use a Base64InputStream instead of loading too much data in memory.

参数:

bytes - The encoded sequence.

返回:

The decoded sequence.

抛出:

RuntimeException - If an unexpected error occurs.

从以下版本开始:

1.2

encode

public static void encode(InputStream inputStream,
          OutputStream outputStream)
                   throws IOException

Encodes data from the given input stream and writes them in the given output stream.

The supplied input stream is read until its end is reached, but it's not closed by this method.

The supplied output stream is nor flushed neither closed by this method.

参数:

inputStream - The input stream.

outputStream - The output stream.

抛出:

IOException - If an I/O error occurs.

encode

public static void encode(InputStream inputStream,
          OutputStream outputStream,
          int wrapAt)
                   throws IOException

Encodes data from the given input stream and writes them in the given output stream, wrapping every encoded line every wrapAt characters. A wrapAt value less than 1 disables wrapping.

The supplied input stream is read until its end is reached, but it's not closed by this method.

The supplied output stream is nor flushed neither closed by this method.

参数:

inputStream - The input stream from which clear data are read.

outputStream - The output stream in which encoded data are written.

wrapAt - The max line length for encoded data. If less than 1 no wrap is applied.

抛出:

IOException - If an I/O error occurs.

decode

public static void decode(InputStream inputStream,
          OutputStream outputStream)
                   throws IOException

Decodes data from the given input stream and writes them in the given output stream.

The supplied input stream is read until its end is reached, but it's not closed by this method.

The supplied output stream is nor flushed neither closed by this method.

参数:

inputStream - The input stream from which encoded data are read.

outputStream - The output stream in which decoded data are written.

抛出:

IOException - If an I/O error occurs.

encode

public static void encode(File source,
          File target,
          int wrapAt)
                   throws IOException

Encodes data from the given source file contents and writes them in the given target file, wrapping every encoded line every wrapAt characters. A wrapAt value less than 1 disables wrapping.

参数:

source - The source file, from which decoded data are read.

target - The target file, in which encoded data are written.

wrapAt - The max line length for encoded data. If less than 1 no wrap is applied.

抛出:

IOException - If an I/O error occurs.

从以下版本开始:

1.3

encode

public static void encode(File source,
          File target)
                   throws IOException

Encodes data from the given source file contents and writes them in the given target file.

参数:

source - The source file, from which decoded data are read.

target - The target file, in which encoded data are written.

抛出:

IOException - If an I/O error occurs.

从以下版本开始:

1.3

decode

public static void decode(File source,
          File target)
                   throws IOException

Decodes data from the given source file contents and writes them in the given target file.

参数:

source - The source file, from which encoded data are read.

target - The target file, in which decoded data are written.

抛出:

IOException - If an I/O error occurs.

从以下版本开始:

1.3