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?
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);
...
For example your service has such response
[ new SomeObject(), new SomeObject(), new SomeObject() ] - this is jsonArray
SomeObject - is a class instance of that your array is contains.
You should use special class TypeToken (docs here https://sites.google.com/site/gson/gson-user-guide)
Type type = new TypeToken<List<SomeObject>>(){}.getType();
String jsonArray = restResponse.getPayload(); - you get response as String
List<SomeObject > list = new Gson().fromJson(jsonArray, type);
Done!
