urlencode urldecode

import java.net.URLDecoder;
import java.net.URLEncoder;

class  Noname1
{
public static void main(String[] args)  throws    java.io.UnsupportedEncodingException
{
String aa = "%D2%A6%D0%A2%BB%D4";   //姚孝辉
URLDecoder url = new URLDecoder();
String bb =new URLDecoder().decode(aa,"GB2312");
String cc= URLEncoder.encode(bb,"GB2312");
System.out.println("aa:"+aa);
System.out.println("bb:"+bb);
System.out.println("cc:"+cc);
}
}