有时候，写接口的时候，需要传好多属性，往往以json数据的格式传递到后台，下面就来举一个我写的接口，主要是用来说明咋解析数据获得需要的字段

首先，前端传递的wordsJson数据是这样的：

{
    "uid":"32854",
    "IDCode":"000066",
    "wordsJson":[
        {
            "dayNum":"7",
            "name":"Tizhong"
        },
        {
            "dayNum":"5",
            "name":"BloodPressure"
        },
        {
            "startTime":"2019-07-06",
            "dayNum":"7",
            "name":"buNum",
            "endTime":"2019-07-12"
        },
        {
            "dayNum":"7",
            "name":"MealBloodSugar"
        }
    ],
    "words":"Tizhong,BloodPressure,buNum,MealBloodSugar"
}

后台如何解析穿度过来的这个json 字段：

拿到该字段转换为json：

public void newUserbodyInfo(HttpServletResponse response,String json){response.setHeader("Access-Control-Allow-Origin", "*");response.setHeader("Access-Control-Allow-Methods","POST");response.setHeader("Access-Control-Allow-Headers","x-requested-with,content-type");if (StringUtils.isEmpty(json)){CommonUtil.renderJson(response,MapUtil.setRequestCode(ResultCode.ERROR.getCode(),"",ResultCode.ILLEGAL_REQUEST_ARGUMENT.getDesc()));return;}JSONObject jsonObject = JSONObject.fromObject(json);//拿到传递来的值：String wordsJson = jsonObject.getString("wordsJson");if (StringUtils.isEmpty(wordsJson)){System.out.printIn("wordsJson不能为空！"));}else{JSONArray jsonArray=JSONArray.fromObject(wordsJson);for (int i = 0; i < jsonArray.size(); i++) {Map map = (Map) jsonArray.get(i);String num=map.get("dayNum").toString();String number= map.get("name").toString();System.out.println(number+"==="+num);}

　}

}

JSONArray jsonArray=JSONArray.fromObject(wordsJson)；将获得String 转为 json数组，然后循环着个格式获得数据。

2.另外一种：  获得json格式是data：{    "body":[        {            "tid":"24",            "tName":"协和血糖专家小组招募计划",            "date":[                {                    "num":"5",                    "tid":"0",                    "type":"24"                },                {                    "num":"1",                    "tid":"1",                    "type":"24"                },                {                    "num":"1",                    "tid":"2",                    "type":"24"                }            ]        }    ],    "IOS_VERSION_CODE":"1000000",    "IOS_VERSION":"1.0",    "status":"1",    "ANDROID_VERSION_CODE":"1020006",    "ANDROID_VERSION":"1.2.6",    "msg":""}

解析的话：

JSONObject jsonObject = JSONObject.fromObject(data);
if (jsonObject.getInt("status") == 1){List list1 = (List) jsonObject.get("body");Map map = (Map) list1.get(0);List resultList = new ArrayList();
}

 List list1 = (List) jsonObject.get("body");是将获得json中获取有用的body的数据，如下红线的地方。

   Map map = (Map) list1.get(0);则是将body中的数据转为一个Map接着就可以去Map中的值了。

  这只是我用的json格式的数据，不一样的传递不一样、