java中的中文字符转码技术

package com.yin.test;

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

/**
 * @author User
 *
 */
public class MyTestClass
{
public static void main(String[] args)
{
      
    String str = "测试字符转换 a beautiful girl"; //默认环境，已是UTF-8编码  
    try {  
        String strGBK = URLEncoder.encode(str, "GBK");  
        System.out.println(strGBK);  
        String strUTF8 = URLDecoder.decode(str, "UTF-8");  
        System.out.println(strUTF8);  
    } catch (UnsupportedEncodingException e) {  
        e.printStackTrace();  
    }  
}
}