Java json对象替换键名称

import com.fasterxml.jackson.databind.ObjectMapper;

public class JsonExample {
    public static void main(String[] args) throws Exception {
        String json = "{\"name\": \"John\", \"age\": 30}";

        // 将Json字符串转换为Java对象
        ObjectMapper objectMapper = new ObjectMapper();
        MyObject myObject = objectMapper.readValue(json, MyObject.class);

        // 替换键名称
        myObject.setName("Jane");

        // 将Java对象转换为Json字符串
        String updatedJson = objectMapper.writeValueAsString(myObject);
        System.out.println(updatedJson);
    }

    static class MyObject {
        private String name;
        private int age;

        // getters and setters
    }
}

import com.google.gson.Gson;

public class JsonExample {
    public static void main(String[] args) {
        String json = "{\"name\": \"John\", \"age\": 30}";

        // 将Json字符串转换为Java对象
        Gson gson = new Gson();
        MyObject myObject = gson.fromJson(json, MyObject.class);

        // 替换键名称
        myObject.setName("Jane");

        // 将Java对象转换为Json字符串
        String updatedJson = gson.toJson(myObject);
        System.out.println(updatedJson);
    }

    static class MyObject {
        private String name;
        private int age;

        // getters and setters
    }
}

import com.alibaba.fastjson.JSONObject;

public class JsonExample {
    public static void main(String[] args) {
        String json = "{\"name\": \"John\", \"age\": 30}";

        // 将Json字符串转换为Java对象
        JSONObject jsonObject = JSONObject.parseObject(json);
        MyObject myObject = jsonObject.toJavaObject(MyObject.class);

        // 替换键名称
        myObject.setName("Jane");

        // 将Java对象转换为Json字符串
        String updatedJson = JSONObject.toJSONString(myObject);
        System.out.println(updatedJson);
    }

    static class MyObject {
        private String name;
        private int age;

        // getters and setters
    }
}