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

依赖包 

<dependency>
    <groupId>com.alibaba</groupId>
    <artifactId>fastjson</artifactId>
    <version>1.2.54</version>
</dependency>

String result = "";

//下面是把拿到的json字符串转成 json对象

JSONObject jsStr = JSONObject.parseObject(requestBody); //将字符串{“id”：1}

//int jsID = Integer.parseInt(jsStr.getString("id"));//获取id的值

/**

* json对象转换成java对象

*/

InvestorApplyModel stud = (InvestorApplyModel) JSONObject.toJavaObject(jsStr,InvestorApplyModel.class);

}

/**

* json字符串转转换成json数组

*/

String schedules = "";

JSONArray schedulesArray= JSONArray.parseArray(schedules);
JSONObject jostr = null;

for (int sched = 0; sched <schedulesArray.size() ; sched++) {

//获取json对象
    jostr = schedulesArray.getJSONObject(0);
  //System.out.println("jostr---" + jostr);

/**

* json对象转换成java对象

*/

    BerthStop berthStopDo = (BerthStop) JSONObject.toJavaObject(jostr, BerthStop.class);

 JSONObject cs = ssel.getCsSchedule();

    JSONArray ss = cs.getJSONArray("hh");

    if (ss == null) {

      return;

    }

    int Len = ss.size();

    List<JSONObject> aa = new ArrayList<>();

    for (int i = 0; i < Len - 1; i++) {

      JSONObject current = (JSONObject) ss.get(i);

      JSONObject nextStop = (JSONObject) ss.get(i + 1);

      if (hasIdleTime(current, nextStop)) {

        logger.info("yyyyye " + ssel.getId());

        JSONObject bb = new JSONObject();

        bb.put("from", pick(current, cc));

        bb.put("to", pick(nextStop, cc));

        aa.add(bb);

      }

    }