Java Implementation BASE64 codec

Java Implementation BASE64 codec

Author: Chszs, reproduced in the note. Blog home:Http://blog.csdn.net/chszs

BASE64 and other similar coding algorithms are often used to convert binary data into textual data, which is intended to simplify storage or transmission. In more detail, the BASE64 algorithm is primarily used to convert binary data into ASCII string formats.

The Java language provides a good implementation of the BASE64 algorithm, the Apache Commons codec toolkit. This article will briefly describe how to use BASE64 and how it works.

Here we encode the string using BASE64:

Import Java.io.unsupportedencodingexception;import Org.apache.commons.codec.binary.base64;public class Base64Test { public static void Main (string[] args) {String str = ' Hello world '; try{byte[] encodeBase64 = base64.encodebase64 (str.getby TES ("UTF-8")); System.out.println ("RESULT:" + new String (encodeBase64));} catch (Unsupportedencodingexception e) {e.printstacktrace ();}}}

The output is:

result:sgvsbg8gv29ybgq=

The above output string is a 8-bit binary value of the "Hello World" string that is concatenated and then grouped in 6 bits.

Each group is then converted to a separate number and mapped to the index of the Base64.

Binarydec Base64010010  S000110  6   G010101  V101100  b000110  6   G111100  8100000  g010101  d110110  2111101  9110010  y011011  b000110  6   G010000  Q

Note: The string is finally added "=". It is intended to indicate the end of the string encoding.

Java Implementation BASE64 codec