Convert JSON array to list of strings in spring using GSON

Question

I have the following JSON

["2848","241"]

By using following jquery code

var list = [];
    $.each($("input[class='selected']:checked"), function(){
        list.push($(this).val());
    });

I am sending this data to my spring controller by using following in ajax post request.

var jsonData = JSON.stringify(list);

My spring controller is as follows

@RequestMapping(value="/myurl", method =  RequestMethod.POST)
    public String sampleMethod(@RequestBody String jsonData){
        Type dataType = new TypeToken<List<String>>(){}.getType();
        List<String> myListObject = gson.fromJson(jsonData, dataType);
        System.out.println(myListObject.size());
        return "redirect:/someotherurl";
    }

I get 500 internal server error for some reason but no stack trace or errors on my console in browser. Please suggest what is missing.?

nothing in my logs, i dont see any stack trace in my eclipse tomcat console either — Nikhil
– Nikhil, Commented Apr 16, 2014 at 19:49
There should always an error if you get an Internal Server Error. If you really can't find anything, set up a breakpoint and step through your sampleMethod code until you find the error. — Bucket
– Bucket, Commented Apr 16, 2014 at 19:58
Yes i did that, it always breaks here, List<String> myListObject = gson.fromJson(jsonData, dataType);....and I observed that my "jsonData" variable in the debugger was having some values like %5B% before my actual json string instead of [" , is it normal? — Nikhil
– Nikhil, Commented Apr 16, 2014 at 20:05
If it breaks there, shouldn't you see an error? Are the parameters of fromJson valid and what you'd expect them to be? This method could throw a JsonParseException or a JsonSyntaxException. — Bucket
– Bucket, Commented Apr 16, 2014 at 20:18

Nikhil · Accepted Answer · 2014-04-16 20:43:53Z

2

Fixed it by adding contentType: "application/json" to my ajax request. The server was not interpreting the json data properly.

answered Apr 16, 2014 at 20:43

Nikhil

1,1862 gold badges19 silver badges36 bronze badges

Sign up to request clarification or add additional context in comments.

Collectives™ on Stack Overflow

Convert JSON array to list of strings in spring using GSON

1 Answer 1

Comments

Your Answer

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

Comments

Your Answer

Sign up or log in

Post as a guest

Related