URL编码 java

System.out.println(URLDecoder.decode("%E7%B1%B3%E5%A5%87","GBK"));/* GBK编码转中文 */

          a=URLEncoder.encode("JJ","GBK");
             System.out.println(a); /* 中文编码转GBK */
             System.out.println(URLDecoder.decode("%E9%A5%AE%E9%A3%9F","UTF-8"));/* UTF-8编码转中文 */
             System.out.println(URLEncoder.encode("http://123.sogou.com/","UTF-8")); /* UTF-8编码转中文 */