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。。。