需掌握的技能点：
jsonp、跨域相关等。
以下两种代码，均可直接运行。
1、使用原生JS：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title> </head>
<body>
<p id="cur_year"></p>
<div id="iciba_ds"></div>
</body>
</html>
<script type="text/javascript">
document.getElementById("cur_year").innerHTML =new Date(); function data(data){
//遍历
var description = "";
for(var i in data.result){
var property=data.result[i];
description+=i+" = "+property+"<br />";
}
document.write(description);
}
</script>
<script type="text/javascript" src="http://api.k780.com:88/?app=weather.today&weaid=412&&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json&jsoncallback=data"></script>
2、使用jquery：
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>Title</title>
<script type="text/javascript" src="jquery-3.3.1.min.js"></script>
<script>
$(document).ready(function(){
$.ajax({
type : 'get',
async : false,
url : 'http://api.k780.com/?app=weather.today&weaid=412&appkey=10003&sign=b59bc3ef6191eb9f747dd4e83c99f2a4&format=json&jsoncallback=data',
dataType : 'jsonp',
jsonp : 'callback',
jsonpCallback : 'data',
success : function(data){
if(data.success!='1'){
alert(data.msgid+' '+data.msg);
exit;
}
//遍历
var description = "";
for(var i in data.result){
var property=data.result[i];
description+=i+" = "+property+"<br />";
}
document.write(description);
},
error:function(){
alert('fail');
}
});
});
</script>
</head>
<body>
</body>
</html>