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.phpstudy.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.phpstudy.net/upload/client/yhjyios.plist\" class=\"apple download\"><img src=\"images/p_down_apple.png\" /></a> <a href=\"http://m.phpstudy.net/download.jsp?platform=android\" class=\"download\"><img src=\"images/p_down_and.png\" /></a> </div> </body> </html>
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