How to convert JSON string to custom object?

Question

I've string like this (just )

"{\"username":\"stack\",\"over":\"flow\"}"

I'd successfully converted this string to JSON with

JSONObject object = new JSONObject("{\"username":\"stack\",\"over":\"flow\"}");

I've a class

public class MyClass
{
    public String username;
    public String over;
}

How can I convert JSONObject into my custom MyClass object?

Look into Jackson or Gson, they both handle this sort of thing. — Thomas, Nov 25 '13 at 13:24

score 12 · Answer 1 · answered Nov 25 '13 at 13:25

12

you need Gson:

Gson gson = new Gson(); 
final MyClass myClass = gson.fromJson(jsonString, MyClass.class);

also what might come handy in future projects for you: Json2Pojo Class generator

answered Nov 25 '13 at 13:25

Goran Štuc

581
4
15

+1 Note: Gson is great for simple cases. If you need more control, have a look at Jackson. – Aaron Digulla Nov 25 '13 at 13:25
@Goran Štuc One doubt, what is this GSON, is that better than JSON Object – Suganthan Madhavan Pillai Nov 25 '13 at 13:33
Gson is an API which you can obtain here: http://code.google.com/p/google-gson/ – Goran Štuc Nov 25 '13 at 13:37

score 8 · Accepted Answer · answered Nov 25 '13 at 13:26

8

You can implement a static method in MyClass that takes JSONObject as a parameter and returns a MyClass instance. For example:

public static MyClass convertFromJSONToMyClass(JSONObject json) {
    if (json == null) {
        return null;
    }
    MyClass result = new MyClass();
    result.username = (String) json.get("username");
    result.name = (String) json.get("name");
    return result;
}

answered Nov 25 '13 at 13:26

Konstantin Yovkov

62,134
8
100
147

1

Is there any way to convert the object using JSONObject? without modifying the class – jpganz18 Dec 11 '15 at 15:49

How to convert JSON string to custom object?

2 Answers2

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