我认为您想使用注解JsonAdapter来实现自定义行为。
这是一个扩展了JsonSerializer、JsonDeserializer的示例类Xyz。
import com.google.gson.*;
import java.lang.reflect.Type;
public class Xyz implements JsonSerializer<String>, JsonDeserializer<String> {
@Override
public JsonElement serialize(String element, Type typeOfSrc, JsonSerializationContext context) {
JsonObject object = new JsonObject();
object.addProperty("value", element);
object.addProperty("xyzEnabled", true);
return object;
}
@Override
public String deserialize(JsonElement json, Type typeOfT, JsonDeserializationContext context) throws JsonParseException {
return json.getAsString();
}
}
this is a sample use
import com.google.gson.annotations.JsonAdapter;
public class Demo {
@JsonAdapter(Xyz.class)
public String name;
public int total;
}
我写了一些更多的测试,也许它们能帮助你更好地解决这个问题。
import com.google.gson.Gson;
import org.junit.Test;
import static org.junit.Assert.assertEquals;
public class Custom {
@Test
public void serializeTest() {
Demo demo = new Demo();
demo.total = 100;
demo.name = "hello world";
String json = new Gson().toJson(demo);
assertEquals("{\"name\":{\"value\":\"hello world\",\"xyzEnabled\":true},\"total\":100}", json);
}
@Test
public void deserializeTest() {
String json = "{ \"name\": \"hello world\", \"total\": 100}";
Demo demo = new Gson().fromJson(json, Demo.class);
assertEquals("hello world", demo.name);
assertEquals(100, demo.total);
}
}