原 jackJson工具类

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本文链接：https://www.91mszl.com/zhangwuji/article/details/1497

一：引入pom

<dependency>
    <groupId>com.fasterxml.jackson.core</groupId>
    <artifactId>jackson-databind</artifactId>
    <version>2.15.2</version>
</dependency>

二：工具类

package com.mszl.controller;

import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;
import java.util.List;
import java.util.Map;

public class JackJsonUtils {

    /**
    * 功能：list转json
    * @Author: zxb
    * @Date: 2025-03-13 11:13:32
    */
    public static String listToJson(List<?> list) throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        String json= objectMapper.writeValueAsString(list);
        return json;
    }

    /**
    * 功能：json转list
    * @Author: zxb
    * @Date: 2025-03-13 11:15:28
    */
    public static <T> List<T> jsonToList(String json, Class<T> clazz) throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        List<T> list = objectMapper.readValue(json, objectMapper.getTypeFactory().constructCollectionType(List.class, clazz));
        return list;
    }

    /**
    * 功能：对象转json
    * @Author: zxb
    * @Date: 2025-03-13 11:17:49
    */
    public static String objToJson(Object obj) throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        String json= objectMapper.writeValueAsString(obj);
        return json;
    }

    /**
    * 功能：json转对象
    * @Author: zxb
    * @Date: 2025-03-13 11:19:05
    */
    public static <T> T jsonToObj(String json, Class<T> clazz) throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        T obj = objectMapper.readValue(json, clazz);
        return obj;
    }

    /**
    * 功能：map转json
    * @Author: zxb
    * @Date: 2025-03-13 11:20:09
    */
    public static String mapToJson(Map<?, ?> map) throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        String json= objectMapper.writeValueAsString(map);
        return json;
    }

    /**
    * 功能：json转map
    * @Author: zxb
    * @Date: 2025-03-13 11:22:13
    */
    public static Map<Object, Object> jsonToMap(String json) throws JsonProcessingException {
        ObjectMapper objectMapper = new ObjectMapper();
        Map<Object, Object> map = objectMapper.readValue(json, Map.class);
        return map;
    }


}

参考资料：https://blog.csdn.net/u012060033/article/details/136991731