Obtain complex JSON structure using java

Question

I have pasted a sample JSON Structure which I am trying to achieve using java program finally the output should be in JSONObject. I tried using map but it became very complex if I was not going wrong.

{
"name": "flare",
"children": [
    {
    "name": "analytics",
    "children": [
        {
        "name": "cluster",
        "children": [
            {"name": "AgglomerativeCluster"},
            {"name": "CommunityStructure"},
            {"name": "HierarchicalCluster"},
            {"name": "MergeEdge"}
        ]
        }]
    },
    {
    "name": "graph",
    "children": [
        {"name": "BetweennessCentrality"},
        {"name": "LinkDistance"},
        {"name": "MaxFlowMinCut"},
        {"name": "ShortestPaths"},
        {"name": "SpanningTree"}
    ]
    }
]
}

See http://stackoverflow.com/questions/18983185/how-to-create-correct-jsonarray-in-java-using-jsonobject — stepanian, Mar 25 '14 at 09:01
It's not very clear what your question is. Please post your code as an [minimal example](http://stackoverflow.com/help/mcve) that demonstrates your problem. — Duncan Jones, Mar 25 '14 at 09:01
@Duncan: I think he wants to create the JSON structure using Java code. — stepanian, Mar 25 '14 at 09:05

Pranava Sheoran · Answer 1 · 2014-03-26T06:24:35.403

0

You can try using GSON library by google. You can create Java objects and GSON turns them into JSON automatically. Have a look: https://code.google.com/p/google-gson/ The disadvantage of using JSONObject directly would be that it would become very complicated in your case. And as the data you want to put in JSON grows, it would become very difficult.

edited Mar 26 '14 at 06:24

answered Mar 25 '14 at 09:02

Pranava Sheoran

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score 0 · Answer 2 · answered Mar 25 '14 at 09:22

0

Use JSONObject

For example:

myString = new JSONObject().put("JSON", "Hello, World!").toString();

produces the string {"JSON": "Hello, World"}.

answered Mar 25 '14 at 09:22

stepanian

11,373
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score 0 · Answer 3 · answered Mar 25 '14 at 13:55

Using GSON library is easy. Create Person class with an attribute to an array of same class.

class Person {
    private String name;
    private Person[] children;

    //getters

    //setters
}

and then, use it to get instance from json

// Create person
Person person = new Gson().fromJson(jsonString, Person.class);
// Get children
Person[] childrens = person.getChildren();

Obtain complex JSON structure using java

3 Answers3