使用 Javascript 读取 URL 中显示的 JSON 字符串

Question

我正在尝试创建一个简单的网络应用程序，它获取存储在 JSON 字符串中的纬度和经度，并使用它们在 google 地图上放置标记。目前，我在服务器上有一个程序，当在 Web 浏览器中输入 URL 时，它会检索带有数据的 JSON 字符串。生成的JSON字符串如下：-

{"employees":[{"email":"bones93@hotmail.co.uk","lat":"53","lon":"-3","alt":"0","date":"unknown","time":"unknown"},{"email":"unknown","lat":"0","lon":"0","alt":"0","date":"unknown","time":"unknown"},{"email":"unknown","lat":"0","lon":"0","alt":"0","date":"unknown","time":"unknown"}]}

我可以在 JavaScript 中使用什么方法来获取生成的 JSON 字符串？

P.S我知道之后我需要解析文本来制作一个JSON对象，这是可以在之后完成的事情。

Answer 1

你可以使用

var x = JSON.parse('{"employees":[{"email":"bones93@hotmail.co.uk","lat":"53","lon":"-3","alt":"0","date":"unknown","time":"unknown"},{"email":"unknown","lat":"0","lon":"0","alt":"0","date":"unknown","time":"unknown"},{"email":"unknown","lat":"0","lon":"0","alt":"0","date":"unknown","time":"unknown"}]}');

然后通过以下方式访问它：

x["employees"][0]["lat"];

Answer 2

对普通字符串试试这个：

JSON.parse(str)

或者，如果您使用 AJAX 来获取 Json，您可以使用以下方法：

$.get(..,'json')

或

$.post(..,'json')

Answer 3

使用Jquery库的get方法从服务器请求数据。这是一个 link 到简单的 W3 教程：http://www.w3schools.com/jquery/ajax_get.asp

您的代码将如下所示：

$("button").click(function(){
  $.get("/your/server/url",function(data){
    var result = JSON.parse(data);
    // Process result.employees
  });
});

使用 Javascript 读取 URL 中显示的 JSON 字符串

Read JSON String Shown In URL Using Javascript

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