改进: Json有2个动态字段(一个字段在另一个字段中)到Gson

import com.google.gson.Gson;
import java.util.Map;

public class JsonExample {
    public static void main(String[] args) {
        String json = "{\"field1\":\"value1\",\"field2\":{\"subfield\":\"value2\"}}";

        Gson gson = new Gson();
        Map<String, Object> jsonMap = gson.fromJson(json, Map.class);

        String field1 = (String) jsonMap.get("field1");
        Map<String, Object> field2 = (Map<String, Object>) jsonMap.get("field2");
        String subfield = (String) field2.get("subfield");

        System.out.println("field1: " + field1);
        System.out.println("subfield: " + subfield);
    }
}