我需要解析一下
JSON响应：
- {"key1": "value1","key2": "value2","key3":
- {"childKey1": "childValue1","childKey2": "childValue2","childKey3": "childValue3" }
- }
- class Egg {
- @SerializedName("key1")
- private String mKey1;
- @SerializedName("key2")
- private String mKey2;
- @SerializedName("key3")
- // ???
- }
我正在阅读Gson文档,但无法弄清楚如何正确地将字典反序列化为地图.
解决方法
Gson很容易处理一个JSON对象的反序列化,其名称为：值对到Java Map.
以下是使用原始问题的JSON的示例. (此示例还演示如何使用FieldNamingStrategy避免为每个字段指定序列化名称,前提是字段到元素的名称映射是一致的.)
- import java.io.FileReader;
- import java.lang.reflect.Field;
- import java.util.Map;
- import com.google.gson.FieldNamingStrategy;
- import com.google.gson.Gson;
- import com.google.gson.GsonBuilder;
- public class Foo
- {
- public static void main(String[] args) throws Exception
- {
- GsonBuilder gsonBuilder = new GsonBuilder();
- gsonBuilder.setFieldNamingStrategy(new MyFieldNamingStrategy());
- Gson gson = gsonBuilder.create();
- Egg egg = gson.fromJson(new FileReader("input.json"),Egg.class);
- System.out.println(gson.toJson(egg));
- }
- }
- class Egg
- {
- private String mKey1;
- private String mKey2;
- private Map<String,String> mKey3;
- }
- class MyFieldNamingStrategy implements FieldNamingStrategy
- {
- //Translates the Java field name into its JSON element name representation.
- @Override
- public String translateName(Field field)
- {
- String name = field.getName();
- char newFirstChar = Character.toLowerCase(name.charAt(1));
- return newFirstChar + name.substring(2);
- }
- }
