Post array of json objects to Spring MVC Controller

Question

I have problems with sending and receiving a list of json objects (jQuery Ajax)

Java Object

public class UserSkill () {

 private long user;
 private long skill;
 private long level;

 //getter and setter methods

}

From Controller i get list of objects and it looks like this

$.getJSON("getList", function(data) {
    console.log(data);
});

//console log ->  [Object { user=4, skill=61, leve=10}, Object { user=3, skill=61, level=20}]

I changed some values and we have following code

ioarray = [];

//update methods

console.log(ioarray);

//console log ->  [Object { user=4, skill=61, level=9000 }, Object { user=3, skill=61, level=100 }]

Ajax POST

$.ajax({
    url : 'goUpdate',
    type : 'POST',
    contentType : 'application/json; charset=utf-8',
    dataType : 'json',
    data: ioarray,
    succcess : function(e) {
        alert('Yeah');
}

Controller

@RequestMapping(value = "goUpdate", method = RequestMethod.POST)
    public Object goUpdatePOST(@RequestBody List<UserSkill> list) {

        //list.get(0).getLevel(); 

        return list;
}

Logs

type Status report

message Request method 'POST' not supported

description The specified HTTP method is not allowed for the requested resource.

Something wrong here ... any ideas?

UPDATE;

Controler

@RequestMapping(value = "goUpdate", method = RequestMethod.POST)
public @ResponseBody String goUpdatePOST(@RequestBody UserSkill[] list) {

    for(UserSkill i : list) {
        System.out.println(i.getSkill());
    }
    return "somepage";

}

jQuery

var ioarray = [{ user:4, skill:61, level:10}, 
{ user:3,  skill:61, level:20}];

        $.ajax({
            url : 'goUpdate',
            type : 'POST',
            data: JSON.stringify(ioarray),
        });

Console output

JSON
0
    Object { user=4, skill=61, level=10}

1
    Object { user=3, skill=61, level=20}

Source
[{"user":4,"skill":61,"level":10},{"user":3,"skill":61,"level":20}]

to pom.xml inserted jackson-mapper-asl and jackson-core-asl.

Of course this example generate same error... What i am doing wrong? I think I checked every possibility.

try removing @RequestBody then, there is some issue with the data posted and its type. — Ankur Singhal
– Ankur Singhal, Commented Aug 28, 2014 at 11:25
I did like that in data: {list: ioarray}, still occour like above but post at now: list%5B0%5D%5Buser%5D=4&list%5B0%5D%5Bskill%5D=61&list%5B0%5D%5Blevel%5D=10&list%5B1%5D%5Buser%5D=3&list%5B1%5D%5Bskill%5D=61&list%5B1%5D%5Blevel%5D=20 — user2363971
– user2363971, Commented Aug 28, 2014 at 11:28
so now your data is getting enocded using UT-8 format, try removing dataType : 'json' — Ankur Singhal
– Ankur Singhal, Commented Aug 28, 2014 at 11:47

Ankur Singhal · Accepted Answer · 2014-08-28 13:46:04Z

2

does this works for you

    $.ajax({
        url : 'goUpdate',
        type : 'POST',
        data: JSON.stringify(ioarray),
        dataType: "json",
        contentType: "application/json"
    });

answered Aug 28, 2014 at 13:46

Ankur Singhal

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5 Comments

user2363971 Over a year ago

it doesn't work too ... I think it probably is not a problem with JSON, but what else?

Ankur Singhal Over a year ago

@user2363971 can you inspect using firebug what exactly is getting posted in data

user2363971 Over a year ago

Accept application/json, text/javascript, /; q=0.01 Accept-Encoding gzip, deflate Accept-Language pl,en-US;q=0.7,en;q=0.3 Content-Length 97 Content-Type application/json; charset=UTF-8 Cookie JSESSIONID=BF78D2145022CEAC47AF35260444E8B2 Host localhost:8069 Referer localhost:8069/xxx/indexpage User-Agent Mozilla/5.0 (Windows NT 6.1; WOW64; rv:31.0) Gecko/20100101 Firefox/31.0 X-Requested-With XMLHttpRequest

Ankur Singhal Over a year ago

@user2363971 i am talking about the post request, the json that is being posted

user2363971 Over a year ago

I know it late but the problem was <csrf /> (spring security). Your solution was correct. Thanks for your help.

franki3xe · Accepted Answer · 2014-08-28 13:31:11Z

0

try to use value = "/goUpdate"

@RequestMapping(value = "/goUpdate", method = RequestMethod.POST)

answered Aug 28, 2014 at 13:31

franki3xe

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1 Comment

franki3xe Over a year ago

have goUpdate path some prefix? or is running like localhost/goUpdate??

Yagnesh Agola · Accepted Answer · 2014-08-28 13:42:15Z

I got same problem i didn't find any solution at last i have find another solution using simple HttpServletRequest.
You may use HttpServletRequest to read request data and use JSON API to convert this json String into List<UserSkill> object. You may use GSON API for converting your json string into list .

For this you need following changed in controller class method as shown below :

@RequestMapping(value = "goUpdate", method = RequestMethod.POST)
public @ResponseBody String goUpdatePOST(HttpServletRequest request) 
{
    String jsonStr = IOUtils.toString(request.getInputStream());
    Gson gson = new Gson();
    Type  fooType = new TypeToken<List<UserSkill>>() {}.getType();
    List<UserSkill> list = gson.fromJson(jsonStr,fooType);
    return gson.toJson(list);
}

In response send JSON string which can be created by converting List<UserSkill> into JSON string using Gson API.

May this will help you.

TanvirChowdhury · Accepted Answer · 2021-02-01 11:25:49Z

JS:

 $.ajax({
        type : "post",
        dataType : 'json', 
        url : 'addAdmin',  
        data : JSON.stringify(ioarray)
 })

Controller (note it takes a custom String only). Then it uses Jackson to parse the string manually, because Spring won't do it in this case. (Spring will only auto-parse if you're using @ModelAttribute form binding.)

@PostMapping("/addAdmin")
public boolean addAdmin(@RequestBody String json) throws Exception {

      String decodedJson = java.net.URLDecoder.decode(json, "UTF-8");
      ObjectMapper jacksonObjectMapper = new ObjectMapper(); // This is Jackson
      List<UserRolesGUIBean> userRolesGUIBeans =  jacksonObjectMapper.readValue(
              decodedJson, new TypeReference<List<UserRolesGUIBean>>(){});
      // Now I have my list of beans populated.
}

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