bootstrap ajax - （se7en框架）

验证邮箱是否存在：

js代码：

$("#validate-form").validate({
      rules: {
        firstname: "required",
        lastname: "required",
        username: {
          required: true,
          minlength: 2
        },
        password: {
          required: true,
          minlength: 5
        },
        confirm_password: {
          required: true,
          minlength: 5,
          equalTo: "#password"
        },
        email: {
          required: true,
          email: true,
          remote:{  
              url:"validate/checkUnique",  
              type:"get",  
              dateType:"json",  
              data:{name:$("#name").val()}  
            } ,
            dataFilter: function (data) {　　　　//判断控制器返回的内容
                if (data == "true") {
                    return true;
                }
                else {
                    return false;
                }
            }
        }
        
        
      },
      messages: {
        firstname: "Please enter your first name",
        lastname: "Please enter your last name",
        username: {
          required: "Please enter a username",
          minlength: "Your username must consist of at least 2 characters"
        },
        password: {
          required: "Please provide a password",
          minlength: "Your password must be at least 5 characters long"
        },
        confirm_password: {
          required: "Please provide a password",
          minlength: "Your password must be at least 5 characters long",
          equalTo: "Please enter the same password"
        },
      //  email: "Please enter a valid email address"
        	
        email: {
        	remote: " tell me why." ,
        	required: "aaaa"
      	},        	
      },
      
      submitHandler: function(form) {  
          form.submit();  
      }  
    });

后台代码：

@RequestMapping("validate/checkUnique")
	public String validateUsers(HttpServletRequest request, HttpServletResponse response) throws IOException{
		String cs = request.getParameter("email");
		System.out.println("cs:"+cs);
		PrintWriter out = response.getWriter();
		out.println(false);
		return null;
	}