 
<%@page import="java.util.regex.Matcher"%> 
<%@page import="java.util.regex.Pattern"%> 
<%@ page language="java" pageEncoding="UTF-8"%> 
<%! 

// \b 是單詞邊界(連著的兩個(字母字符 與 非字母字符) 之間的邏輯上的間隔), 
// 字符串在編譯時會被轉碼一次,所以是 "\\b" 
// \B 是單詞內部邏輯間隔(連著的兩個字母字符之間的邏輯上的間隔) 
String phoneReg = "\\b(ip(hone|od)|android|opera m(ob|in)i" 
+"|windows (phone|ce)|blackberry" 
+"|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp" 
+"|laystation portable)|nokia|fennec|htc[-_]" 
+"|mobile|up.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\\b"; 
String tableReg = "\\b(ipad|tablet|(Nexus 7)|up.browser" 
+"|[1-4][0-9]{2}x[1-4][0-9]{2})\\b"; 
Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE); 
Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE); 

public boolean checkMobile(String userAgent){ 
if(null == userAgent){ 
userAgent = ""; 
} 
// 匹配 
Matcher matcherPhone = phonePat.matcher(userAgent); 
Matcher matcherTable = tablePat.matcher(userAgent); 
if(matcherPhone.find() || matcherTable.find()){ 
return true; 
} else { 
return false; 
} 
} 
%> 
<% 
String path = request.getContextPath(); 
String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; 

// 
String userAgent = request.getHeader( "USER-AGENT" ).toLowerCase(); 

if(null == userAgent){ 
userAgent = ""; 
} 
if(checkMobile(userAgent)){ 
response.sendRedirect(basePath+"download.html"); 
//request.getRequestDispatcher("/download.html").forward(request,response); 
} else { 
response.sendRedirect(basePath+"index.html"); 
//request.getRequestDispatcher("/index.html").forward(request,response); 
} 
// 
%> 

<!DOCTYPE html> 
<html lang="zh-cn"> 
<head> 
<base href="<%=basePath%>"> 

<title>測試移動設備跳轉</title> 
<meta http-equiv="pragma" content="no-cache"> 
<meta http-equiv="cache-control" content="no-cache"> 
<meta http-equiv="expires" content="0"> 
<meta http-equiv="keywords" content="測試,移動設備,跳轉"> 
<meta http-equiv="description" content="測試移動設備跳轉"> 
<!-- 
<link rel="stylesheet" type="text/css" href="styles.css"> 
--> 
</head> 

<body> 

<div id="pagecontent" style="min-height:500px;_height:500px;"> 

正在運行！<br> 
</div> 

</body> 
</html> 