Creating JSON using java library

Question

I am trying to create a JSON as following format -

{
 "approvable" : "true",
 "approvedBy" : [user1, user2, user3, user4]
}

I have two java variables -

boolean approvable;
List<User> approvedBy;

If the approvedBy list contains all the Users, then can I make the JSON directly using any JSON library? Suppose I want to do something like this -

JsonBuilder jb = new JsonBuilder();
jb.add("approvable", true);
jb.add("approvedBy", approvedBy);

Ultimately, all I need to do is to simplifying the making of JSON. Can anyone suggest any good JSON library which give me this support?

Thanks in advance

Use Jackson (or Gson I suppose). Both of those libraries support automatic binding between JSON and POJOs. Whatever you do, don't waste your time with manual conversion. — dnault
– dnault, Commented Nov 12, 2014 at 0:59
In my opinion/experience, "manual conversion" is less effort (and often fewer lines of code) than dealing with automatic binding to POJOs. The problem is that many people do not take the time to understand JSON and so feel they must use "cookbook" approaches. — Hot Licks
– Hot Licks, Commented Nov 12, 2014 at 1:07

Ankur Singhal · Accepted Answer · 2014-11-12 00:52:11Z

API used is flexjson

public static void main(String args[]) throws Exception {

        Child child2 = new Child("ankur", 23);
        Child child1 = new Child("ankurs", 23);
        Child child3 = new Child("ankurss", 21);

        List<Child> childList = new ArrayList<Child>();
        childList.add(child1);
        childList.add(child2);
        childList.add(child3);

        Parent parent = new Parent();
        parent.setApprovable(true);
        parent.setChildList(childList);
        JSONSerializer serializer = new JSONSerializer();
        System.out.println(serializer.exclude("*.class").deepSerialize(parent));

    }

Output

{
    "approvable": true,
    "childList": [
        {
            "age": 23,
            "name": "ankurs"
        },
        {
            "age": 23,
            "name": "ankur"
        },
        {
            "age": 21,
            "name": "ankurss"
        }
    ]
}

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