Java JDK1.7对字符串的BASE64编码解码方法

package cn.itcast;

import java.io.ioexception;

import java.io.unsupportedencodingexception;

import org.junit.test;

import sun.misc.base64decoder;

/*

  * @author soto

  * base64编码 解码

  * */

public class demo1 {

  @test

  public void fun1() throws ioexception{

   //base64编码

   string str = "hello" ;

   byte [] bytes = str.getbytes( "utf-8" );

   str = new sun.misc.base64encoder().encode(bytes);

   system.out.println( "编码后... " +str);

   //base64解码

   base64decoder decoder = new base64decoder();

   byte [] b = decoder.decodebuffer(str);

   str = new string(b, "utf-8" );

   system.out.println( "解码后... " + str);

  }

}