java中的编码与解码

import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import java.net.URLEncoder;

public class UTFEncode {

 public static String change(String str) throws UnsupportedEncodingException {
  str = URLDecoder.decode(str, "unicode");    //解码
  //str = URLEncoder.encode(str, "unicode");  //编码
  return str;
 }
 
 public static void  main(String []args) throws UnsupportedEncodingException{
  String str="%FF%FE%10%62%9F%52";
  //String str="成功";
  System.out.println(change(str));
 }
}