java - Gson - 序列化时避免不必要的包装类

Question

我有一个 Json 字符串:

{
    "Locations":{
        "Location":[{
            "elevation":"100",
            "latitude":"0",
            "longitude":"0",
            "name":"Ocean"
        },
        ...
    ]}
}

我想使用 Gson 将其序列化为 Location 类的数组:

public class Location {
    public double elevation;
    public double latitude;
    public double longitude;
    public String name;
}

而不是创建一个 Locations 类和一个带有 Locations 字段的包装类。这是可能的吗？

Answer 1

您可以获得Locaitons 对象，然后是Location 数组。下面的代码是纯 Gson:

String jsonAsText = "{\"Locations\":{\"Location\":[{\"elevation\":\"100\",\"latitude\":\"0\",\"longitude\":\"0\",\"name\":\"Ocean\"},{\"elevation\":\"100\",\"latitude\":\"0\",\"longitude\":\"0\",\"name\":\"Ocean\"}]}}";

GsonBuilder gsonBuilder = new GsonBuilder();
Gson gson = gsonBuilder.create();

java.lang.reflect.Type listType = new com.google.gson.reflect.TypeToken<List<Location>>(){}.getType();

JsonArray locationJsonList = (JsonArray) ((JsonObject) gson.fromJson(jsonAsText, JsonObject.class).get("Locations")).get("Location");
List<Location> locatioList = gson.fromJson(locationJsonList, listType);