java 常用Bean 转换工具类

package com.hnf.framework.utils;

import com.alibaba.fastjson.JSON;

import com.fasterxml.jackson.databind.ObjectMapper;

import org.springframework.beans.BeanUtils;

import org.springframework.util.CollectionUtils;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

/**

 * @Author: xxx

 * @Date: 2019/1/14 16:21

 * @Description: bean工具类

 */

public class MyBeanUtils {

    /**

     * 对象拷贝

     * @param source 源

     * @param target 目标

     */

    public static void copyProperties(Object source, Object target){

        if(source == null){return;}

        BeanUtils.copyProperties(source, target);

    }

    /**

     * List 对象拷贝

     * @param list 源

     * @param <T> 目标

     * @return 目标

     */

    public static <T, E> List copyList(List<T> list, Class<E> clazz) {

        if (CollectionUtils.isEmpty(list)) {

            return new ArrayList();

        }

        return JSON.parseArray(JSON.toJSONString(list), clazz);

    }

    /**

     * MAP拷贝

     * @param map 源

     * @return 目标

     */

    public static Map<String, Object> copyMap(Map map) {

        if(CollectionUtils.isEmpty(map)){

            return new HashMap<>();

        }

        return JSON.parseObject(JSON.toJSONString(map));

    }

    /**

     * json 转 Map

     * @param json

     * @return

     */

    public static Map<String, Object> jsonToMap(String json) {

        try {

            ObjectMapper objectMapper = new ObjectMapper();

            return objectMapper.readValue(json, Map.class);

        } catch (Exception ex){

            ex.printStackTrace();

        }

        return null;

    }

}