json转map

引用ali的fastjson,将json转换成map,代码如下:

import com.alibaba.fastjson.JSONArray;
import com.alibaba.fastjson.JSONObject;

import java.util.*;


/**
 * @author lelontar
 * @ClassName: Json2MapUtil
 * @ProjectName user-service
 * @Description: 将json字符串转换成map
 * @date 2019/2/18/14:27
 */
public class Json2MapUtil {
    /**
     * 将json字符串转为Map结构
     * @param json
     * @return 返回一个map
     */
    public static HashMap<String, Object> json2Map(String json) {
        HashMap<String, Object> map = new HashMap<>();
        if(jsonStr != null && !"".equals(json)){
            //最外层解析
            JSONObject json = JSONObject.parseObject(json);
            for (Object k : json.keySet()) {
                Object v = json.get(k);
                //判断是否是数组,如果是数组继续解析
                if (v instanceof JSONArray) {
                    List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
                    Iterator it = ((JSONArray) v).iterator();
                    while (it.hasNext()) {
                        Object jsonObj = it.next();
                        list.add(json2Map(jsonObj.toString()));
                    }
                    map.put(k.toString(), list);
                } else {
                    map.put(k.toString(), v);
                }
            }
            return map;
        }else{
            return null;
        }
    }
}