JSP中实现判断客户端手机类型并跳转到app下载页面
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。
<%@pageimport="java.util.regex.Matcher"%>
<%@pageimport="java.util.regex.Pattern"%>
<%@pagelanguage="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)
StringandroidReg="\\bandroid|Nexus\\b";
StringiosReg="ip(hone|od|ad)";
PatternandroidPat=Pattern.compile(androidReg,Pattern.CASE_INSENSITIVE);
PatterniosPat=Pattern.compile(iosReg,Pattern.CASE_INSENSITIVE);
publicbooleanlikeAndroid(StringuserAgent){
if(null==userAgent){
userAgent="";
}
//匹配
MatchermatcherAndroid=androidPat.matcher(userAgent);
if(matcherAndroid.find()){
returntrue;
}else{
returnfalse;
}
}
publicbooleanlikeIOS(StringuserAgent){
if(null==userAgent){
userAgent="";
}
//匹配
MatchermatcherIOS=iosPat.matcher(userAgent);
if(matcherIOS.find()){
returntrue;
}else{
returnfalse;
}
}
%>
<%
Stringpath=request.getContextPath();
StringbasePath=request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";
//
StringuserAgent=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);
}elseif(likeIOS(userAgent)){
System.out.println("likeIOS:"+true);
response.sendRedirect("http://itunes.apple.com/us/app/id714751061");
return;
//request.getRequestDispatcher("/index.html").forward(request,response);
}
%>
<!DOCTYPEhtmlPUBLIC"-//W3C//DTDXHTML1.0Transitional//EN""http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<htmlxmlns="http://www.w3.org/1999/xhtml">
<head>
<metahttp-equiv="Content-Type"content="text/html;charset=utf-8"/>
<metaname="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>
<linkhref="css/style.css"rel="stylesheet"type="text/css"/>
</head>
<body>
<divclass="p_down">
<div>
<ahref="index.html">
<imgsrc="images/p_logo.png"class="p_logo"/>
</a>
</div>
<ahref="itms-services://?action=download-manifest&url=http://m.jb51.net/upload/client/yhjyios.plist"class="appledownload"><imgsrc="images/p_down_apple.png"/></a>
<ahref="http://m.jb51.net/download.jsp?platform=android"class="download"><imgsrc="images/p_down_and.png"/></a>
</div>
</body>
</html>