Add the idea and code of weather display to the page with javascript

2020-03-30 00:42:08
OfStack

 
<%@ page language="java" pageEncoding="UTF-8"%> 
<html> 
<head> 
<script> 
function load(cid) 
{ 
var xmlhttp; 
if (window.XMLHttpRequest) 
{// code for IE7+, Firefox, Chrome, Opera, Safari 
xmlhttp=new XMLHttpRequest(); 
} 
else 
{// code for IE6, IE5 
xmlhttp=new ActiveXObject("Microsoft.XMLHTTP"); 
} 
xmlhttp.open("GET","date.jsp?cid="+cid,false); 
xmlhttp.send(); 
var obj = eval("("+ xmlhttp.responseText+")"); 
//var obj=JSON.parse(xmlhttp.responseText); //IE8 The above  
document.getElementById("test").innerHTML=obj.weatherinfo.city+":"+obj.weatherinfo.weather1+" "+obj.weatherinfo.temp1; 
} 
</script> 
</head> 
<body> 
<p id="test"> The weather in </p> 
<button id="btn1" onClick=load("101280601")> The weather in shenzhen </button> 
<button id="btn2" onClick=load("101250501")> Chenzhou weather </button> 
<!-- 
 city id Access to: http://blog.csdn.net/zgyulongfei/article/details/7956118 
--> 
</body> 
</html>

date.jsp

 
<%@ page language="java" import="java.net.*,java.io.*" pageEncoding="utf-8"%> 
<% 
String cid = request.getParameter("cid"); 
URL url = new URL("http://m.weather.com.cn/data/"+cid+".html"); 
HttpURLConnection httpConn = (HttpURLConnection) url.openConnection(); 
httpConn.connect(); 
InputStream cin = httpConn.getInputStream(); 
BufferedReader reader = new BufferedReader(new InputStreamReader(cin,"UTF-8")); 
StringBuffer sb = new StringBuffer(); 
String rl = null; 
while ((rl = reader.readLine()) != null) 
sb.append(rl); 
out.println(sb); 
%>