Gson JsonArray pretty printing

Question

Here is my example:

public class Obj {
    String field1;
    int field2;
    public Obj(String field1, int field2) {
        this.field1 = field1;
        this.field2 = field2;
    }   
    public static void main(String[] args) 
    {       
        final Obj o1 = new Obj("string1",1);
        final Obj o2 = new Obj("string2",2);

        List<Obj> list = new ArrayList<Obj>(){{
            add(o1);
            add(o2);
        }};

        Gson gson = new GsonBuilder().setPrettyPrinting().create();
        JsonElement element = gson.toJsonTree(list, new TypeToken<List<Obj>>(){}.getType());
        JsonArray jsonArray = element.getAsJsonArray();
        System.out.println("1-");
        System.out.println(jsonArray.toString());        

        String json = gson.toJson(o1);
        System.out.println("2-");
        System.out.println(json);
    }
}

The output:

1-
[{"field1":"string1","field2":1},{"field1":"string2","field2":2}]

2-
{
  "field1": "string1",
  "field2": 1
}

How can I enable pretty printing for jsonArray?

I think this is enough to explain my problem, however here is some bla bla bla bla because stackoverflow ask me more details to let me post the question.

I didn't get what do you want? Dou want to write json on console looks good? — hurricane, Jan 23 '15 at 09:30

score 2 · Answer 1 · answered Jan 23 '15 at 09:35

2

toString(2) respect identation spaces

System.out.println(json.toString(2));

answered Jan 23 '15 at 09:35

rafaelasguerra

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score 2 · Accepted Answer · answered Jan 23 '15 at 10:04

2

It seems that JsonArray::toString doesn't provide a way to configure pretty-printing.

You may just have to deserialise it using your Gson instance:

System.out.println("3-");
System.out.println(gson.toJson(jsonArray));

answered Jan 23 '15 at 10:04

Jonathan

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score 0 · Answer 3 · edited May 23 '17 at 12:28

0

You could use Jackson library.

Check this post: Convert JSON String to Pretty Print JSON output using Jackson

The question was really similar.

edited May 23 '17 at 12:28

Community

1
1

answered Jan 23 '15 at 09:32

Salec

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score 0 · Answer 4 · answered Jan 23 '15 at 09:36

0

If you have server on your project i suggest make simple index.jsp and out.println this JSON. And add this plugin to your Google Chrome JSON Viewer

You get pretty Print Json.

answered Jan 23 '15 at 09:36

hurricane

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Gson JsonArray pretty printing

4 Answers4