将Map转换为json字符串颤动

import com.fasterxml.jackson.databind.ObjectMapper;

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);
        map.put("city", "New York");

        try {
            // 使用Jackson库将Map转换为JSON字符串
            ObjectMapper objectMapper = new ObjectMapper();
            String jsonString = objectMapper.writeValueAsString(map);

            System.out.println(jsonString);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

{"name":"John","age":30,"city":"New York"}