How do I pass an array of integer into spring controller?

Question

script Array of int and I wish to pass into Spring Controller. but I keep getting

400 bad request.

if my js array is

array = [1,2,3,4]
array -> 400 bad request
JSON.Stringify(array) -> I will get [1,2,3,4]

    $.ajax({//jquery ajax
                data:{"images": array},                
                dataType:'json',
                type:"post",
                url:"hellomotto"
                ....
            })

when I loop the string List.. the first element will be '[1'

@RequestMapping(value = "/hellomotto", method = Request.POST)
public void hellomotto(@RequestParam("images") List<String> images){
 sysout(images); -> I will get [1,2,3,4]
}

public void

May I know how can I do this properly? I have tried different combination

Please show what you're trying to pass it to and the stack trace from the server. — chrylis -cautiouslyoptimistic-
– chrylis -cautiouslyoptimistic-, Commented Oct 18, 2013 at 2:12
the development com is disconnected from internet.. I'm merely trying to pass an array of String/integer into the controller. — user4127
– user4127, Commented Oct 18, 2013 at 2:13
Whether you're running on an Internet-connected computer is irrelevant; you're running an embedded Web server that just happens to be accessible to only one client, and it has stack traces that explain what failed. — chrylis -cautiouslyoptimistic-
– chrylis -cautiouslyoptimistic-, Commented Oct 18, 2013 at 2:22
Also, array -> 400 bad request is not very informative. Are you saying that you get that answer if you pass the array into that JQuery AJAX call? — chrylis -cautiouslyoptimistic-
– chrylis -cautiouslyoptimistic-, Commented Oct 18, 2013 at 2:24

mapm · Accepted Answer · 2015-10-06 12:40:21Z

7

The following is a working example:

Javascript:

$('#btn_confirm').click(function (e) {

    e.preventDefault();     // do not submit the form

    // prepare the array
    var data = table.rows('.selected').data();
    var ids = [];
    for(var i = 0; i < data.length; i++) { 
        ids.push(Number(data[i][0]));
    }

    $.ajax({
        type: "POST",
        url: "?confirm",
        data: JSON.stringify(ids),
        contentType: "application/json; charset=utf-8",
        dataType: "json",
        success: function(data){
            alert(data);
        },
        failure: function(errMsg) {
            alert(errMsg);
        }
    });
});

Controller:

@RequestMapping(params = "confirm", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
public @ResponseBody int confirm(@RequestBody Long[] ids) {
    // code to handle request
    return ids.length;
}

answered Oct 6, 2015 at 12:40

mapm

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1 Comment

Nitul Over a year ago

any idea how to do in angular 2, as it is passing array within array.

Viktor K. · Accepted Answer · 2013-10-18 04:09:23Z

0

@RequestParam is used to bind request parameters, so if you do something like

@RequestMapping(value = "/hellomotto", method = Request.POST)
public void hellomotto(@RequestParam("image") String image){
     ...
}

and you do post to /hellomotto?image=test, the image variable in hellomotto method will contain "test"

What you want to do is to parse Request body , so you should you should use @RequestBody annotation :

http://docs.spring.io/spring/docs/3.0.x/reference/mvc.html#mvc-ann-requestbody

it is using jackson labrary (so you will have to include it as your dependency) to parse json object into java object.

answered Oct 18, 2013 at 4:09

Viktor K.

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Comments

Oomph Fortuity · Accepted Answer · 2013-10-18 08:35:04Z

0

I think you wantAjax call,through ajax, you are sending List of Integers so in spring your controller will be

@RequestMapping(value = "/hellomotto", method = Request.POST)
@ResponseBody
public void hellomotto(@RequestParam("images") List<Integer> images){
 sysout(images); -> I will get [1,2,3,4]
}

*@ResponseBody is missing in Your Code

answered Oct 18, 2013 at 8:35

Oomph Fortuity

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