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Class com.oreilly.servlet.Base64Decoder 

java.lang.Object
   |
   +----java.io.InputStream
           |
           +----java.io.FilterInputStream
                   |
                   +----com.oreilly.servlet.Base64Decoder
public class Base64Decoder
extends FilterInputStream
A class to decode Base64 streams and strings. See RFC 1521 section 5.2 for details of the Base64 algorithm.

This class can be used for decoding strings: 

 String encoded = "d2VibWFzdGVyOnRyeTJndWVTUw";
 String decoded = Base64Decoder.decode(encoded);
or for decoding streams: 
 InputStream in = new Base64Decoder(System.in);

Version:
1.0, 2000/06/11
Author:
Jason Hunter, Copyright © 2000

Constructor Index

o Base64Decoder(InputStream)
Constructs a new Base64 decoder that reads input from the given InputStream.

Method Index

o decode(String)
Returns the decoded form of the given encoded string.
o main(String[])
o read()
Returns the next decoded character from the stream, or -1 if end of stream was reached.
o read(byte[], int, int)
Reads decoded data into an array of bytes and returns the actual number of bytes read, or -1 if end of stream was reached.

Constructors

o Base64Decoder 
 public Base64Decoder(InputStream in)
Constructs a new Base64 decoder that reads input from the given InputStream.

Parameters:
in - the input stream

Methods

o read 
 public int read() throws IOException
Returns the next decoded character from the stream, or -1 if end of stream was reached.

Returns:
the decoded character, or -1 if the end of the input stream is reached
Throws: IOException
if an I/O error occurs
Overrides:
read in class FilterInputStream
o read 
 public int read(byte b[],
                 int off,
                 int len) throws IOException
Reads decoded data into an array of bytes and returns the actual number of bytes read, or -1 if end of stream was reached.

Parameters:
buf - the buffer into which the data is read
off - the start offset of the data
len - the maximum number of bytes to read
Returns:
the actual number of bytes read, or -1 if the end of the input stream is reached
Throws: IOException
if an I/O error occurs
Overrides:
read in class FilterInputStream
o decode 
 public static String decode(String encoded)
Returns the decoded form of the given encoded string.

Parameters:
encoded - the string to decode
Returns:
the decoded form of the encoded string
o main 
 public static void main(String args[]) throws Exception

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