How to deserialize a JSON array of objects using Gson library?

Question

I am facing an issue while I am trying to deserialize a JSON array of objects using the Gson library.

An example of the JSON array:

[
    {"ID":1,"Title":"Lion","Description":"bla bla","ImageURL":"http:\/\/localhost\/lion.jpg"},
    {"ID":1,"Title":"Tiger","Description":"bla bla","ImageURL":"http:\/\/localhost\/tiger.jpg"}
]

What do you think? What is the proper Java code to deserialize such a JSON response?

Answer 1

To deserialize a JSONArray you need to use TypeToken. You can read more about it from GSON user guide. Example code:

@Test
public void JSON() {
    Gson gson = new Gson();
    Type listType = new TypeToken<List<MyObject>>(){}.getType();
    // In this test code i just shove the JSON here as string.
    List<Asd> asd = gson.fromJson("[{'name':\"test1\"}, {'name':\"test2\"}]", listType);
}

If you have a JSONArray then you can use

...
JSONArray jsonArray = ...
gson.fromJson(jsonArray.toString(), listType);
...