edu.jhu.tmaj.util
Class Base64Coder

java.lang.Object
  extended by edu.jhu.tmaj.util.Base64Coder

public class Base64Coder
extends java.lang.Object

A Base64 Encoder/Decoder.

This class is used to encode and decode data in Base64 format as described in RFC 1521.

This is "Open Source" software and released under the GNU/LGPL license.
It is provided "as is" without warranty of any kind.
Copyright 2003: Christian d'Heureuse, Inventec Informatik AG, Switzerland.
Home page: www.source-code.biz

Version history:
2003-07-22 Christian d'Heureuse (chdh): Module created.
2005-08-11 chdh: Lincense changed from GPL to LGPL.
2006-11-21 chdh:
  Method encode(String) renamed to encodeString(String).
  Method decode(String) renamed to decodeString(String).
  New method encode(byte[],int) added.
  New method decode(String) added.
Downloaded from: http://www.source-code.biz/snippets/java/2.htm


Method Summary
static byte[] decode(char[] in)
          Decodes a byte array from Base64 format.
static byte[] decode(java.lang.String s)
          Decodes a byte array from Base64 format.
static java.lang.String decodeString(java.lang.String s)
          Decodes a string from Base64 format.
static char[] encode(byte[] in)
          Encodes a byte array into Base64 format.
static char[] encode(byte[] in, int iLen)
          Encodes a byte array into Base64 format.
static java.lang.String encodeString(java.lang.String s)
          Encodes a string into Base64 format.
 
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
 

Method Detail

encodeString

public static java.lang.String encodeString(java.lang.String s)
Encodes a string into Base64 format. No blanks or line breaks are inserted.

Parameters:
s - a String to be encoded.
Returns:
A String with the Base64 encoded data.

encode

public static char[] encode(byte[] in)
Encodes a byte array into Base64 format. No blanks or line breaks are inserted.

Parameters:
in - an array containing the data bytes to be encoded.
Returns:
A character array with the Base64 encoded data.

encode

public static char[] encode(byte[] in,
                            int iLen)
Encodes a byte array into Base64 format. No blanks or line breaks are inserted.

Parameters:
in - an array containing the data bytes to be encoded.
iLen - number of bytes to process in in.
Returns:
A character array with the Base64 encoded data.

decodeString

public static java.lang.String decodeString(java.lang.String s)
Decodes a string from Base64 format.

Parameters:
s - a Base64 String to be decoded.
Returns:
A String containing the decoded data.
Throws:
java.lang.IllegalArgumentException - if the input is not valid Base64 encoded data.

decode

public static byte[] decode(java.lang.String s)
Decodes a byte array from Base64 format.

Parameters:
s - a Base64 String to be decoded.
Returns:
An array containing the decoded data bytes.
Throws:
java.lang.IllegalArgumentException - if the input is not valid Base64 encoded data.

decode

public static byte[] decode(char[] in)
Decodes a byte array from Base64 format. No blanks or line breaks are allowed within the Base64 encoded data.

Parameters:
in - a character array containing the Base64 encoded data.
Returns:
An array containing the decoded data bytes.
Throws:
java.lang.IllegalArgumentException - if the input is not valid Base64 encoded data.