public static void main(String[] args) {
         try{
             System.out.println(java.net.URLDecoder.decode("%cc%e1%bd%bb","gbk"));
             System.out.println(java.net.URLDecoder.decode("%e6%8f%90%e4%ba%a4","utf8"));
         }catch(Exception e){
             e.printStackTrace();
         }
     }上述代码中 “提交”utf8编码 对应的 urlencode 为 %e6%8f%90%e4%ba%a4“提交”gbk编码 对应的 urlencode 为 %cc%e1%bd%bb如何自动根据内容正确解码