反序列化复杂的gson-Java

Question

I have an array of objects which are like below.

{
  "propone": {
    "proponeone": {
      "a": 1,
      "b": 1,
      "c": 1
    },
    "proponetwo": {
      "a": 1
    },
    "proponethree": {
      "a": 1,
      "b": 1
    },
    "proponethree": {
      "a": 1,
      "b": 1,
      "c": 1
    }
  },
  "proptwo": {
    "proptwoone": [
      "val1",
      "val2",
      "val3",
      "val4"
    ],
   "proptwoone": [
      "val5",
      "val6",
      "val7"
    ]
  }
}

I read this array to a JsonObject and I want to deserialize this array of objects. I want to put "proptwoone" in to a HashMap of type <String, ArrayList<String>> . Is there a way to do that? I use Gson.

Answer 1

If your JSON's structure will be always like that, you can try to create a class like this, using a generic Object for that part you're not interested in:

public class Response {
  public Object propone;
  public HashMap<String, ArrayList<String>> proptwo;
}

Then just parse your JSON with:

Response response = gson.fromJson(yourJsonString, Response.class);

And your HashMap will be under:

response.proptwo

But I guess this won't work if you have duplicated field names proptwoone ...