判断客户端手机类型,并跳转到相应的app下载页面
实现的原理,是检测浏览器的 user-agent 这个header,然后根据正则表达式来确定客户端类型。
如果都不匹配，fallback回退策略是显示对应的页面，让用户自己选择。
适合采用二维码扫描方式下载app：
jsp版本的代码如下所示:其他服务端版本请百度搜索。
<%@page import="java.util.regex.matcher"%>
<%@page import="java.util.regex.pattern"%>
<%@ page language="java" pageencoding="utf-8"%>
<%!
// b 是单词边界(连着的两个(字母字符 与 非字母字符) 之间的逻辑上的间隔),字符串在编译时会被转码一次,所以是 "\b"
// b 是单词内部逻辑间隔(连着的两个字母字符之间的逻辑上的间隔)
string androidreg = "\bandroid|nexus\b";
string iosreg = "ip(hone|od|ad)";
pattern androidpat = pattern.compile(androidreg, pattern.case_insensitive);
pattern iospat = pattern.compile(iosreg, pattern.case_insensitive);
public boolean likeandroid(string useragent){
if(null == useragent){
useragent = "";
}
// 匹配
matcher matcherandroid = androidpat.matcher(useragent);
if(matcherandroid.find()){
return true;
} else {
return false;
}
}
public boolean likeios(string useragent){
if(null == useragent){
useragent = "";
}
// 匹配
matcher matcherios = iospat.matcher(useragent);
if(matcherios.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();
system.out.println("useragent: "+useragent);
if(null == useragent){
useragent = "";
}
if(likeandroid(useragent)){
system.out.println("likeandroid: "+true);
response.sendredirect("http://m.jb51.net/download.jsp?platform=android");
return;
//request.getrequestdispatcher("/download.html").forward(request,response);
} else if(likeios(useragent)){
system.out.println("likeios: "+true);
response.sendredirect("http://itunes.apple.com/us/app/id714751061");
return;
//request.getrequestdispatcher("/index.html").forward(request,response);
}
%>
<!doctype html public "-//w3c//dtd xhtml 1.0 transitional//en" "http://www.w3.org/tr/xhtml1/dtd/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="content-type" content="text/html; charset=utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1, minimum-scale=1, user-scalable=no">
<title>下载客户端 - 永恒记忆</title>
<link href="css/style.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div class="p_down">
<div>
<a href="index.html">
<img src="images/p_logo.png" class="p_logo" />
</a>
</div>
<a href="itms-services://?action=download-manifest&url=http://m.jb51.net/upload/client/yhjyios.plist" class="apple download"><img src="images/p_down_apple.png" /></a>
<a href="http://m.jb51.net/download.jsp?platform=android" class="download"><img src="images/p_down_and.png" /></a>
</div>
</body>
</html>
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