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.

Answer 1

toString（2）尊重标识空间

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

Answer 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));

Answer 3

You could use Jackson library.

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

The question was really similar.

Answer 4

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.