json数组转换成list map

• jar引用

<dependency>
    <groupId>net.sf.json-lib</groupId>
    <artifactId>json-lib</artifactId>
    <version>2.4</version>
    <classifier>jdk15</classifier>
</dependency>

• json数据

[{
  "address": "北京",
  "sex": "女",
  "name": "小丽",
  "age": "23"
}, {
  "address": "西安",
  "sex": "女",
  "name": "张三",
  "age": "20"
}, {
  "address": "广州",
  "sex": "男",
  "name": "小王",
  "age": "2"
}, {
  "address": "广州",
  "sex": "男",
  "name": "王五",
  "age": "27"
}, {
  "address": "厦门",
  "sex": "男",
  "name": "小王",
  "age": "29"
}, {
  "address": "北京",
  "sex": "女",
  "name": "小丽",
  "age": "23"
}]

• 完整代码

package com.example.exceldemo;//替换成自己java类所在的包

import net.sf.json.JSONArray;
import net.sf.json.JSONObject;
import java.io.*;
import java.util.*;

/**
 * json数组转list<Map>
 */
public class JsonToList {
    public static void main(String[] args) {
        String json = readJson();
        JSONArray array = JSONArray.fromObject(json);
        List<Map<String, Object>> list = (List<Map<String, Object>>) translate(array);
        System.out.println(list);
    }

    /**
     * 读取json文件
     * @return
     */
    public static String readJson(){
        FileInputStream inputStream = null;
        InputStreamReader reader = null;
        BufferedReader bf = null;
        StringBuffer sf = null;
        try {
            inputStream = new FileInputStream(new File("src/main/resources/static/json/user.json"));
            reader = new InputStreamReader(inputStream, "UTF-8");
            bf = new BufferedReader(reader);
            sf = new StringBuffer();
            String json = null;
            while ((json = bf.readLine()) != null) {
                sf.append(json);
            }
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                inputStream.close();
                reader.close();
                bf.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        return sf.toString();
    }
    /**
     * 将JSONArray对象转换成List集合
     *
     * @param json
     * @return
     * @see
     */
    public static Object translate(JSONArray json) {
        List<Object> list = new ArrayList<Object>();
        for (Object o : json) {
            if (o instanceof JSONArray)
                list.add(translate((JSONArray) o));
            else if (o instanceof JSONObject)
                list.add(translate((JSONObject) o));
            else
                list.add(o);
        }
        return list;
    }

    /**
     * 将JSONObjec对象转换成Map集合
     *
     * @param json
     * @return
     * @see
     */
    public static HashMap<String, Object> translate(JSONObject json) {
        HashMap<String, Object> map = new HashMap<String, Object>();
        Set keys = json.keySet();
        for (Object key : keys) {
            Object o = json.get(key);
            if (o instanceof JSONArray)
                map.put((String) key, translate((JSONArray) o));
            else if (o instanceof JSONObject)
                map.put((String) key, translate((JSONObject) o));
            else
                map.put((String) key, o);
        }
        return map;
    }

}

• 输出

[{address=北京, sex=女, name=小丽, age=23}, {address=西安, sex=女, name=张三, age=20}, {address=广州, sex=男, name=小王, age=2}, {address=广州, sex=男, name=王五, age=27}, {address=厦门, sex=男, name=小王, age=29}, {address=北京, sex=女, name=小丽, age=23}]