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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