技術標籤：springbootjavajson字串

fastjson確實很好用，廢話不多說，上程式碼：

我需要提取的json資料：需要獲取json的部分欄位賦值給實體物件，並存入資料庫。

{
    "code": "0",
    "data": {
        "lives": [
            {
                "liveType": 1,
                "coverUpdate": 90,
                "streams": [
                    {
                        "coverUrl": "http://livecloudpic.lechange.cn/LCO/6G00A43PAG63E49/0/0/20201207Tc6fbf1b4efa714b.jpg",
                        "streamId": 0,
                        "hls": "https://cmgw-vpc.lechange.com:8890/LCO/6G00A43PAG63E49/0/0/20201207T110025/eb0df407b58120b41cb.m3u8?proto=https"
                    },
                    {
                        "coverUrl": "http://livecloudpic.lechange.cn/LCO/6G00A43PAG63E49/0/0/20201207T110025/e20b41c6fbf1b4efa714b.jpg",
                        "streamId": 1,
                        "hls": "https://cmgw-ge.com:8890/LCO/6G00A43PAG63E49/0/1/20201207T110025/eb0df407b58120b41c6fbf1b4efa714b.m3u8?proto=https"
                    },
                    {
                        "coverUrl": "http://livecloudpic.lechange.cn/LCO/6G00A43PAG63E49/0/0/20201207T110025/0b41c6fbf1b4efa714b.jpg",
                        "streamId": 0,
                        "hls": "http://cmgw-vpc.lechange.com:8888/LCO/6G00A43PAG63E49/0/0/20201207T110025/eb0df407b5bf1b4efa714b.m3u8"
                    },
                    {
                        "coverUrl": "http://livecloudpic.lechange.cn/LCO/6G00A43PAG63E49/0/0/20201207T110025/eb0df407b58120b41c6fbf1b4efa714b.jpg",
                        "streamId": 1,
                        "hls": "http://cmgw-vpc.lechange.com:8888/LCO/6G00A43PAG63E49/0/1/20201207T1100bf1b4efa714b.m3u8"
                    }
                ],
                "liveToken": "f4b5d61806b96ba2d3ef3f9d8ac",
                "job": [
                    {
                        "period": "always",
                        "status": true
                    }
                ],
                "deviceId": "6G00A43E49",
                "liveStatus": 1,
                "channelId": "0"
            }
        ],
        "count": 1
    },
    "errMsg": "",
    "success": true
}
 

json中陣列物件，物件裡面又巢狀陣列。java後端解析程式碼；其中result是json字串。

        String results = sbf.toString();
        //JSON字串轉換成JSON物件
        JSONObject json_o = JSONObject.parseObject(results);
        //得到data的json物件
        JSONObject jsondata = JSON.parseObject(json_o.getString("data"));
        System.out.println(jsondata);
        //得到data中的lives物件，並用jsonarr儲存
        JSONArray jsonarr = jsondata.getJSONArray("lives");
        //使用for迴圈遍歷datalist裡的json值，如：price，ISBN
        for(int i = 0;i<jsonarr.size();i++){
            LiveCameraEntity liveCameraEntity=new LiveCameraEntity();
            JSONObject jsonb = jsonarr.getJSONObject(i);
            liveCameraEntity.setChannelId(jsonb.getString("channelId"));
            liveCameraEntity.setDeviceId(jsonb.getString("deviceId"));
            //streams陣列的處理
            JSONArray jsonArray6=jsonb.getJSONArray("streams");
            JSONObject jsonarr1 = jsonArray6.getJSONObject(1);
            System.out.println("3333333333333333333333333"+jsonarr1);
            liveCameraEntity.setCoverUrl(jsonarr1.getString("coverUrl"));
            liveCameraEntity.setStreamId(jsonarr1.getInteger("streamId"));
            liveCameraEntity.setHls(jsonarr1.getString("hls"));
            //job陣列的處理
            JSONObject jsonarr2=jsonb.getJSONArray("job").getJSONObject(0);
            liveCameraEntity.setPeriod(jsonarr2.getString("period"));
            liveCameraEntity.setStatus(jsonarr2.getBoolean("status"));
            baseMapper.insert(liveCameraEntity);
            System.out.println("11111111111111111111111"+liveCameraEntity+"6666666666666666666666");
 

其中result是json字串。

總結：不要怕，不要慫，耐著性子，幹著幹著就出來了。

我搜了很多部落格，感覺最好的兩篇：https://www.cnblogs.com/ioioi/p/9437096.html

https://www.cnblogs.com/ibigboy/p/11124524.html#_label4