webcad_01_0_1
Class Base64Encoder

public class Base64Encoder
extends 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);
Version:
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
Author:
Jason Hunter, Copyright © 2000
Constructor Detail

Base64Encoder
















































public Base64Encoder(OutputStream out)
Constructs a new Base64 encoder that writes output to the given OutputStream.
Parameters:
out - the output stream
Method Detail

write
















































public void write(int b)
Writes the given byte to the output stream in an encoded form.
Throws:
IOException - if an I/O error occurs

write
















































public void write(byte[] buf,















































                  int off,















































                  int len)
Writes the given byte array to the output stream in an encoded form.
Parameters:
b - the data to be written
off - the start offset of the data
len - the length of the data
Throws:
IOException - if an I/O error occurs

close
















































public void close()
Closes the stream, this MUST be called to ensure proper padding is written to the end of the output stream.
Throws:
IOException - if an I/O error occurs

encode
















































public static String encode(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[]).
Parameters:
unencoded - the string to encode
Returns:
the encoded form of the unencoded string

encode
















































public static String encode(byte[] bytes)
Returns the encoded form of the given unencoded string.
Parameters:
unencoded - the string to encode
Returns:
the encoded form of the unencoded string