jquery-post 异常

报错：Client closed connection before receiving entire response

前端请求：

 $.ajax({
                      type : 'POST' ,
                      url : '/usercheck',
                      headers :{'Content-Type':'application/json'},
                      data : {"name":"2","passwd":"2"},
                      success:  function (data) {
                          console.log("111111111")
                          console.log(data)
                          if (data.result == "200") {
                              alert(data);
                          } else {
                              alert("邮件发送成功");
                          }
                      }
                  })

后端接受：

public String userCheck(@RequestBody userDao userdao){}

错误原因：因为后端传的{"name":"2","passwd":"2"}不是json格式，需要转下json

改为下面即可成功

  $('#submit').click(function(){
                  var formData = new Object;
                  formData.name = $('#name').val();
                  formData.passwd = $('#Password').val();
                  var JsonData = JSON.stringify(formData);
                  $.ajax({
                      type : 'POST' ,
                      url : '/usercheck',
                      headers :{'Content-Type':'application/json'},
                      data : JsonData,
                      success:  function (data) {
                          console.log("111111111")
                          console.log(data)
                          if (data.result == "200") {
                              alert(data);
                          } else {
                              alert("登录成功");
                          }
                      }
                  })
              });
         });

 另外：需要加headers

headers :{'Content-Type':'application/json'},