javascript - 使用javascript读取json

Question

我正在服务器上发送一些请求，它回复我:

{
    "count": 100,
    "entries": [
        {
            "id": 7563,
            "application": "my-app",
            "user": "admin",
            "time": "2012-10-10T11:32:09.324+07:00",
            "values": {
                "/my-app/name": "4d79f56b-1a20-4b25-bff6-b5f1d7253790"
            }
        },
        {
            "id": 7561,
            "application": "my-app",
            "user": "admin",
            "time": "2012-10-10T11:32:08.687+07:00",
            "values": {
                "/my-app/name": "4d79f56b-1a20-4b25-bff6-b5f1d7253790"
            }
        }
}

我尝试过，但似乎没有任何效果!

 var my_JSON_object = {};
 var xmlhttp = new XMLHttpRequest();

 my_JSON_object = JSON.parse(xmlhttp.responseText);

 xmlhttp.open("GET",url,true);
 xmlhttp.sand();

一切都很好。但值返回 null。
任何帮助将不胜感激!

[my code]

Answer 1

更正您的代码:

 xmlhttp.open("GET",url,false);
 xmlhttp.send();

 //get response after sending request
 my_JSON_object = JSON.parse(xmlhttp.responseText);