js.util

Class Base64

java.lang.Object

js.util.Base64

public final class Base64
extends Object

Base64 encoding utility class. Provides handy method for encode and decode strings and bytes array to and from Base64 format.

Sample use case as below:

 String credentials = Strings.concat(user, ':', password);
 String basicAuthorization = "Basic " + Base64.encode(credentials);
 

Version:

final

Author:

Iulian Rotaru

Field Summary

Fields

Modifier and Type	Field and Description
private static byte[]	CHARS_2_NIBLES Mapping table from Base64 characters to 6-bit nibbles.
private static char[]	NIBLES_2_CHARS Mapping table from 6-bit nibbles to Base64 characters.

Constructor Summary

Constructors

Modifier	Constructor and Description
private	Base64() Prevent default constructor synthesis.

Method Summary

Modifier and Type	Method and Description
static byte[]	decode(String base64) Decodes a byte array from a Base64 formated string.
static String	encode(byte[] bytes) Encodes a byte array into Base64 format.
static String	encode(String string) Encode string value into Base64 format.

Methods inherited from class java.lang.Object

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

Field Detail

NIBLES_2_CHARS

private static final char[] NIBLES_2_CHARS

Mapping table from 6-bit nibbles to Base64 characters.

CHARS_2_NIBLES

private static final byte[] CHARS_2_NIBLES

Mapping table from Base64 characters to 6-bit nibbles.

Constructor Detail

Base64

private Base64()

Prevent default constructor synthesis.

Method Detail

encode

public static String encode(String string)

Encode string value into Base64 format.

Parameters:

string - string to encode.

Returns:

given string value encoded Base64.

encode

public static String encode(byte[] bytes)

Encodes a byte array into Base64 format. No blanks or line breaks are inserted.

Parameters:

bytes - an array containing the data bytes to be encoded.

Returns:

a string with the Base64 encoded data.

decode

public static byte[] decode(String base64)

Decodes a byte array from a Base64 formated string. No blanks or line breaks are allowed within the Base64 encoded data.

Parameters:

base64 - a character array containing the Base64 encoded data.

Returns:

an array containing the decoded data bytes.

Throws:

IllegalArgumentException - if the input is not valid Base64 encoded data.