JSON formatting for a Java Server

Question

I am trying to read JSON string using gson into a Java program. In the sample code below - the Java program has 3 object classes. The data in the json string will have a vari

Answer 1

First of all you have to decide what is your base json structure ? Max identifiers, max values, max objects,max arrays...

1. Create your full json structure with texteditor or http://www.jsoneditoronline.org/ or http://jsonlint.com/ etc.

Let's think this is my full json structure:

{
  "array": [
    1,
    2,
    3
  ],
  "boolean": true,
  "null": null,
  "number": 123,
  "object": {
    "a": "b",
    "c": "d",
    "e": "f"
  },
  "string": "Hello World"
}

2. Create your Java Classes as like as your json identifiers. You can use http://json2csharp.com/ convert to Java.

And these are my Java Classes:

public class Object
{
    public string a { get; set; }
    public string c { get; set; }
    public string e { get; set; }
}

public class RootObject
{
    public ArrayList array { get; set; }
    public Boolean boolean { get; set; }
    public Object @null { get; set; }
    public int number { get; set; }
    public Object @object { get; set; }
    public string @string { get; set; }
}

3. Create your DAO for convert these to structure to them.

For Java;

String data = "jsonString"; 
RootObject root = new GsonBuilder().create().fromJson(data, RootObject.class);

For Json;

Gson gson = new GsonBuilder().setDateFormat("dd/MM/yyyy").create();
String json = gson.toJson(obj);