alibaba.fastjson demo

String jsonstr = {
"data":{
"result":[
{
"metric":{},
"value":[
1555398460.239,
"12"
]
}
],
"resultType":"vector"
},
"status":"success"
}

    JSONObject json = JSONObject.parseObject(jsonstr);
    System.out.println(JSONObject.toJSONString(json, true));
    JSONArray array = json.getJSONObject("data").getJSONArray("result");
    JSONObject jo = array.getJSONObject(0);
    String d = jo.getJSONArray("value").getString(1);
    System.out.println(d);