Spring mvc receives json object_javascript skills

This article introduces the method of receiving json data in spring mvc through code examples. The specific details are as follows:

Receive JSON

Using the @RequestBody annotation on the frontend only requires you to submit a formatted JSON to the Controller, and Spring will automatically assemble it into a bean.

1) On the basis of using the first method to return JSON in the above project, add the following method:

Java code

@RequestMapping(value="/add",method=RequestMethod.POST, headers = {"content-type=application/json","content-type=application/xml"})
@ResponseBody
public Object addUser(@RequestBody User user)
{
  System.out.println(user.getName() + " " + user.getAge());
  return new HashMap<String, String>().put("success", "true");
}

The POJO here is as follows:

Java code

public class User {
  private String name;
  private String age;
  //getter setter
}

2) In the frontend, we can use jQuery to process JSON. From here, I got a jQuery plug-in that can return a form's data into a JSON object:

Js code

$.fn.serializeObject = function(){
   var o = {};
   var a = this.serializeArray();
   $.each(a, function(){
     if (o[this.name]) {
       if (!o[this.name].push) {
         o[this.name] = [o[this.name]];
       }
       o[this.name].push(this.value || '');
     }
     else {
       o[this.name] = this.value || '';
     }
   });
   return o;
 };

The following is the code for receiving and sending JSON using jQuery:

Js code

$(document).ready(function(){
    jQuery.ajax({
      type: 'GET',
      contentType: 'application/json',
      url: 'jsonfeed.do',
      dataType: 'json',
      success: function(data){
        if (data && data.status == "0") {
          $.each(data.data, function(i, item){
            $('#info').append("姓名：" + item.name +"，年龄：" +item.age);
          });
        }
      },
      error: function(){
        alert("error")
      }
    });
    $("#submit").click(function(){
      var jsonuserinfo = $.toJSON($('#form').serializeObject());
      jQuery.ajax({
        type: 'POST',
        contentType: 'application/json',
        url: 'add.do',
        data: jsonuserinfo,
        dataType: 'json',
        success: function(data){
          alert("新增成功！");
        },
        error: function(){
          alert("error")
        }
      });
    });
  });

But it seems that using Spring is really a troublesome thing. Compared with Jersey’s implementation of RESTful, there are indeed many things that are not concise.

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