json转map

package com.yscredit.sz.util;

import com.alibaba.fastjson.JSON;
import org.apache.commons.collections.map.LinkedMap;
import org.codehaus.jackson.map.ObjectMapper;

import java.util.ArrayList;
import java.util.List;
import java.util.Map;

/**
 * Author: momo
 * Date: 2018/5/7
 * Description:map和json互转工具类
 */
public class MapJsonUtil {

    public static void main(String[] args){
        Map<String,Object> map = new LinkedMap();
        map.put("title","国务院2号文件");
        map.put("attach","根据中华人民共和国");
        String s = mapToJson(map);

        Map<String,Object> map2 = new LinkedMap();
        map2.put("title","省委三号文件");
        map2.put("attach","本次大会研究决定");
        System.out.println(map2);
        String s2 = mapToJson(map2);

        mapListToJson(map,map2);
    }


    /**
     * map转json
     * @param map        {title=国务院2号文件, attach=根据中华人民共和国}
     * @return  json     {"title":"国务院2号文件","attach":"根据中华人民共和国"}
     */
    public static String mapToJson(Map<String,Object> map){
        ObjectMapper obm = new ObjectMapper();
        String param = null;
        try {
            param = obm.writeValueAsString(map);
            return param;
        }catch (Exception ex){
            throw new RuntimeException("map转json出错",ex);
        }
    }

    /**
     * json转map
     * @param jsonStr   {"title":"国务院2号文件","attach":"根据中华人民共和国"}
     * @return  map     {title=国务院2号文件, attach=根据中华人民共和国}
     */
    public static Map<String,Object> jsonToMap(String jsonStr){
        try {
            Map<String,Object> map2= JSON.parseObject(jsonStr,LinkedMap.class);
            return map2;
        }catch (Exception ex){
            throw new RuntimeException("json转map出错",ex);
        }
    }

    /**
     * List<Map<String,Object>>转json
     * @param args  {title=国务院2号文件, attach=根据中华人民共和国}  {title=省委三号文件, attach=本次大会研究决定} ...
     * @return String       [{"title":"国务院2号文件","attach":"根据中华人民共和国"}, {"title":"省委三号文件","attach":"本次大会研究决定"}]
     */
    public static String mapListToJson(Map<String,Object> ...args){
        List<Object> list = new ArrayList<>();
        ObjectMapper obm = new ObjectMapper();
        try {
            if(args.length > 0){
                for (int i = 0,length = args.length;i < length;i++){
                    list.add(obm.writeValueAsString(args[i]));
                }
            }
            return list.toString();
        }catch (Exception ex){
            throw new RuntimeException("List<Map<String,Object>>转json出错",ex);
        }
    }
}

        <dependency>
            <groupId>com.alibaba</groupId>
            <artifactId>fastjson</artifactId>
            <version>1.2.32</version>
        </dependency>