怎么判断是手机访问网站还是电脑访问网站

如何判断是手机访问网站还是电脑访问网站
如何判断是手机访问网站还是电脑访问网站？
需要详细的代码。



[解决办法]

Java code

String userAgent = "";          String userAgents=request.getHeader("user-agent");                    if(userAgents != null ){          userAgent  = userAgents;          userAgent = userAgent.toUpperCase();          }      //out.print(">>>>"+userAgent);          if (userAgent.indexOf("NOKI") > -1 || // Nokia phones and emulators                  userAgent.indexOf("ERIC") > -1 || // Ericsson WAP phones and emulators                  userAgent.indexOf("WAPI") > -1 || // Ericsson WapIDE 2.0                  userAgent.indexOf("MC21") > -1 || // Ericsson MC218                  userAgent.indexOf("AUR") > -1  || // Ericsson R320                  userAgent.indexOf("R380") > -1 || // Ericsson R380                  userAgent.indexOf("UP.B") > -1 || // UP.Browser                  userAgent.indexOf("WINW") > -1 || // WinWAP browser                  userAgent.indexOf("UPG1") > -1 || // UP.SDK 4.0                  userAgent.indexOf("UPSI") > -1 || //another kind of UP.Browser                  userAgent.indexOf("QWAP") > -1 || // unknown QWAPPER browser                  userAgent.indexOf("JIGS") > -1 || // unknown JigSaw browser                  userAgent.indexOf("JAVA") > -1 || // unknown Java based browser                  userAgent.indexOf("ALCA") > -1 || // unknown Alcatel-BE3 browser (UP based)                  userAgent.indexOf("MITS") > -1 || // unknown Mitsubishi browser                  userAgent.indexOf("MOT-") > -1 || // unknown browser (UP based)                  userAgent.indexOf("MY S") > -1 || //  unknown Ericsson devkit browser                   userAgent.indexOf("WAPJ") > -1 || //Virtual WAPJAG www.wapjag.de                  userAgent.indexOf("FETC") > -1 || //fetchpage.cgi Perl script from www.wapcab.de                  userAgent.indexOf("ALAV") > -1 || //yet another unknown UP based browser                  userAgent.indexOf("WAPA") > -1 || //another unknown browser (Web based "Wapalyzer")                  userAgent.indexOf("OPER") > -1 || //Opera                  userAgent.indexOf("DOPOD") > -1 ||  //多普达                  userAgent.indexOf("SYMBIAN") > -1   //symbian系统                  ) {         //通过手机访问      }  else {       //PC    }
[解决办法]
一楼很全了，佩服

就是通过用户的User-Agent 这个http头判断
[解决办法]

通过javascript判断User-Agent或者判断浏览器的版本。+1