[英]how to show json data from web service
I have that link http://api.openweathermap.org/data/2.5/weather?q=Andorra+la+Vella that shows on the browser a json with all the values, so I need to pick only the wind, and the temp, but I don't know how to extract it, how to do that?我有那个链接http://api.openweathermap.org/data/2.5/weather?q=Andorra+la+Vella在浏览器上显示一个包含所有值的 json,所以我只需要选择风,然后temp,但我不知道如何提取它,该怎么做?
I thougt in add a callback after "Andorra+la+Vella"&callback=myFunction我想在“Andorra+la+Vella”&callback=myFunction 之后添加一个回调
And develop a code on javascript to get the values that I need, but I do it and something goes wrong, that's a simple test to try this little application and then i add it to my web:并在 javascript 上开发一个代码来获取我需要的值,但是我这样做了并且出现了问题,这是一个简单的测试来尝试这个小应用程序,然后我将它添加到我的网络中:
<!DOCTYPE HTML>
<html lang="es">
<head>
<meta charset="UTF-8">
<title>Test tiempo andorra</title>
<script type="text/javascript">
function showTime(obj) {
var dadIp=document.getElementById('time');
dadIp.innerHTML+=obj.sunset.wind.speed;
}
</script>
</head>
<body>
<div id="time">
<h1>Test of Time in Andorra</h1>
</div>
<script type="text/javascript" src="http://api.openweathermap.org/data/2.5/weather?q=Andorra+la+Vella&callback=showTime"></script>
</body>
</html>
Look at your JavaScript error console.查看您的 JavaScript 错误控制台。
Uncaught TypeError: Cannot read property 'wind' of undefined
Then look at the JSON source.然后看JSON源码。
obj.sunset
doesn't exist. obj.sunset
不存在。 obj.sys.sunset
does. obj.sys.sunset
确实如此。
obj.sunset.wind
doesn't exist. obj.sunset.wind
不存在。 obj.wind
does. obj.wind
可以。
See a live example when the correct object paths are used.当使用正确的对象路径时,请参阅实时示例。
This way for example:这种方式例如:
var obj = jQuery.parseJSON( '{ "name": "John" }' );
alert( obj.name === "John" )
;
In case if you need parse DateTime I advise to use moment.js library.如果您需要解析 DateTime,我建议使用 moment.js 库。
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