编码URLEncoder和解码URLDecoder UTF-8到GBK的转码

package com.kk;  
  
import java.io.UnsupportedEncodingException;  
import java.net.URLDecoder;  
import java.net.URLEncoder;  
  
public class Charencoding {  
      
    public static void main(String[] args){  
        String s = "CSS测试";  
        try {  
            //css or js post/get data submmit  
            s = URLEncoder.encode(s, "UTF-8");  
            System.out.println("encode :"+s);  
            //backstage java/jsp dispose  
            s = URLDecoder.decode(s, "UTF-8");  
            System.out.println("decode :"+s);  
            s = new String(s.getBytes(),"GBK");  
            System.out.println("GBK :" +s);  
            //combine encoding change  
        //  s = new String(URLDecoder.decode(s, "UTF-8").getBytes(),"GBK");  
        } catch (UnsupportedEncodingException e) {  
            System.out.println("encoding cause,change failure");  
        }catch (Exception e) {  
            System.out.println("others cause,change failure");  
        }  
    }  
}