arrayList to json obj using spring mvc

Question

I need to find an optimised way to pass an arraylist as json a obj to the controller using spring mvc.

Currently I am doing it this way:

public @ResponseBody List<String> abcd() throws Exception {
    return listString;
}

but it is returning a normal list type object. I need a proper json obj which can be accessed by angular js.

There are a ton of Java libraries for conversion from and to JSON. Please research. Also, do not use raw types (`List` instead of `List`.) — RealSkeptic, Jan 18 '17 at 13:14

score 1 · Accepted Answer · edited Jan 18 '17 at 13:55

@ResponseBody should return a JSON object but here is what you can try:

public @ResponseBody ArrayList<YourObject>
    myFunction(HttpServletResponse response) {
    response.setContentType("application/json");     
    return yourArrayList;`
}

You can also try returning a Map instead. Keep your return type as Map <String, Object> and put your ArrayList in the map. This will also work.

score 0 · Answer 2 · answered Jan 18 '17 at 13:13

0

Try to put your list inside an object like

class JSONResponse{
 List<String> names;
 //other nodes of JSON
}

Return the object as response You can also replace String with the objects you desire. Please post the code if you need clear help.

answered Jan 18 '17 at 13:13

Saket Puranik

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arrayList to json obj using spring mvc

2 Answers2