Jackson将Map合并到json对象中

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.databind.node.ObjectNode;

public class MapToJsonExample {
    public static void main(String[] args) {
        // 创建一个Map对象
        Map<String, Object> map = new HashMap<>();
        map.put("name", "John");
        map.put("age", 30);

        // 创建一个空的JSON对象
        ObjectMapper objectMapper = new ObjectMapper();
        ObjectNode jsonNode = objectMapper.createObjectNode();

        // 将Map中的键值对合并到JSON对象中
        for (Map.Entry<String, Object> entry : map.entrySet()) {
            jsonNode.put(entry.getKey(), entry.getValue().toString());
        }

        // 打印合并后的JSON对象
        System.out.println(jsonNode.toString());
    }
}