RESTful Java Web Services - Third Edition

Generating the parameterized Java collection from the JSON representation

The previous example demonstrated the Gson APIs for converting a JSON representation of a single employee object into a Java object. This section discusses how to convert a JSON object array into a Java collection. You can do this by calling the fromJson(JsonReader reader, Type typeOfT) method on the Gson instance. Let's take an example to better understand this API. The steps are as follows:

1. The emp-array.json file used in this example contains a JSON array of the employee objects.
2. This example converts the JSON array read from the input file into the List<Employee> collection object, which is a parameterized collection type (generic type). We use com.google.gson.reflect.TypeToken<T> ...