jquery.validate.js的remote用法

 <script>
   $(function(){
    $("#myform").validate(
    {

     rules: {
      name:{required:true,rangelength:[6,20],
         remote:{                                          //验证用户名是否存在
                type:"POST",
                url:"loginVerifyAction",             //servlet
                data:{
                  name:function(){return $("#name").val();}
                }
               }
             },
      password: {required:true,minlength:6},
      repassword: {required:true,equalTo:"#password"},
      veryCode: {required:true,
         remote:{
                type:"POST",
                url:"valCodeAction",
                data:{
                  veryCode:function(){return $("#veryCode").val();}
                }
               }
      }
     },
     messages: {
      name:{required:"用户名不能为空！",rangelength:jQuery.format("用户名位数必须在{0}到{1}字符之间！"),remote:jQuery.format("用户名已经被注册")},
      password: {required:"密码不能为空！",minlength:jQuery.format("密码位数必须大于等于6个字符！")},
      repassword: {required:"确认密码不能为空！",equalTo:"确认密码和密码不一致！"},
      veryCode:  {required:"请输入验证码",remote:jQuery.format("验证码错误")}
     }
    });
   });

  </script>

 servlet代码：

 //验证用户名是否存在

 public class LoginVerifyAction  extends HttpServlet {
  public void service(HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException {

   response.reset();
   response.setContentType("text/html;charset=UTF-8");
  //业务逻辑操作countByParams得到值并存储到num中
    if(num!=0){
       response.getWriter().print(false);
      }
      else{
       response.getWriter().print(true);
      }
  }
 }

 //验证验证码

 public class ValCodeAction extends HttpServlet {

  public void service(HttpServletRequest request, HttpServletResponse response)
    throws IOException, ServletException {
   //得到验证码的操作请看另一篇文章 ：验证码
         response.setContentType("text/html;charset=UTF-8");
   String validateC = request.getSession().getAttribute("validateCode").toString().trim();
         String veryCode = request.getParameter("veryCode").trim();
         if(veryCode.equals(validateC)){
          response.getWriter().print(true);
         }else{
          response.getWriter().print(false);
         }
 }

 xml中的配置 ： 忽略。。。