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);
}
}
