com.oreilly.servlet

类 Base64Encoder

java.lang.Object

java.io.OutputStream

java.io.FilterOutputStream

com.oreilly.servlet.Base64Encoder

所有已实现的接口:

java.io.Closeable, java.io.Flushable, java.lang.AutoCloseable

public class Base64Encoder
extends java.io.FilterOutputStream

A class to encode Base64 streams and strings. See RFC 1521 section 5.2 for details of the Base64 algorithm.

This class can be used for encoding strings:

 String unencoded = "webmaster:try2gueSS";
 String encoded = Base64Encoder.encode(unencoded);
 

or for encoding streams:

 OutputStream out = new Base64Encoder(System.out);
 

版本:

1.2, 2002/11/01, added encode(byte[]) method to better handle binary data (thanks to Sean Graham), 1.1, 2000/11/17, fixed bug with sign bit for char values, 1.0, 2000/06/11

作者:

Jason Hunter, Copyright © 2000

字段概要

从类继承的字段 java.io.FilterOutputStream

out

构造器概要

构造器

构造器和说明
Base64Encoder(java.io.OutputStream out) Constructs a new Base64 encoder that writes output to the given OutputStream.

方法概要

方法

限定符和类型	方法和说明
void	close() Closes the stream, this MUST be called to ensure proper padding is written to the end of the output stream.
static java.lang.String	encode(byte[] bytes) Returns the encoded form of the given unencoded string.
static java.lang.String	encode(java.lang.String unencoded) Returns the encoded form of the given unencoded string.
static void	main(java.lang.String[] args)
void	write(byte[] buf, int off, int len) Writes the given byte array to the output stream in an encoded form.
void	write(int b) Writes the given byte to the output stream in an encoded form.

从类继承的方法 java.io.FilterOutputStream

flush, write

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

Base64Encoder

public Base64Encoder(java.io.OutputStream out)

Constructs a new Base64 encoder that writes output to the given OutputStream.

参数:

out - the output stream

方法详细资料

write

public void write(int b)
           throws java.io.IOException

Writes the given byte to the output stream in an encoded form.

覆盖:

write 在类中 java.io.FilterOutputStream

抛出:

java.io.IOException - if an I/O error occurs

write

public void write(byte[] buf,
         int off,
         int len)
           throws java.io.IOException

Writes the given byte array to the output stream in an encoded form.

覆盖:

write 在类中 java.io.FilterOutputStream

参数:

buf - the data to be written

off - the start offset of the data

len - the length of the data

抛出:

java.io.IOException - if an I/O error occurs

close

public void close()
           throws java.io.IOException

Closes the stream, this MUST be called to ensure proper padding is written to the end of the output stream.

指定者:

close 在接口中 java.io.Closeable

指定者:

close 在接口中 java.lang.AutoCloseable

覆盖:

close 在类中 java.io.FilterOutputStream

抛出:

java.io.IOException - if an I/O error occurs

encode

public static java.lang.String encode(java.lang.String unencoded)

Returns the encoded form of the given unencoded string. The encoder uses the ISO-8859-1 (Latin-1) encoding to convert the string to bytes. For greater control over the encoding, encode the string to bytes yourself and use encode(byte[]).

参数:

unencoded - the string to encode

返回:

the encoded form of the unencoded string

encode

public static java.lang.String encode(byte[] bytes)

Returns the encoded form of the given unencoded string.

参数:

bytes - the bytes to encode

返回:

the encoded form of the unencoded string

main

public static void main(java.lang.String[] args)
                 throws java.lang.Exception

抛出:

java.lang.Exception