com.xmlmind.util

Class Base64

java.lang.Object

com.xmlmind.util.Base64

public final class Base64
extends Object

Base-64 encoder/decoder. Compliant with MIME's base64 scheme.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Base64.InputStream A filter input stream that decodes the base-64 encoded data obtained from its underlying InputStream.
static class	Base64.OutputStream A filter output stream that encodes in base-64 the binary data passed to its underlying OutputStream.

Method Summary

Modifier and Type	Method and Description
static byte[]	decode(String s) Decodes base-64 encoded string.
static byte[]	decode(String s, int limit) Same as decode(String), except that argument limit allows to limit the number of decoded bytes.
static String	encode(byte[] b) Equivalent to encode(b, 76).
static String	encode(byte[] b, int maxCols) Encodes binary data to base-64.

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

decode

public static byte[] decode(String s)

Decodes base-64 encoded string.

Parameters:

s - base-64 string to be decoded

Returns:

decoded binary data or null if string cannot be decoded.

decode

public static byte[] decode(String s,
                            int limit)

Same as decode(String), except that argument limit allows to limit the number of decoded bytes. This is useful, for example, to detect the format of a base-64 encoded image based on its magic string.

encode

public static String encode(byte[] b)

Equivalent to encode(b, 76).

encode

public static String encode(byte[] b,
                            int maxCols)

Encodes binary data to base-64.

Parameters:

b - binary data to be encoded

maxCols - wrap encoded lines after maxCols characters. Use 0 to disable line wrapping.

Returns:

base-64 encoded string