java 判断请求来自手机端还是电脑端

根据当前请求的特征，判断该请求是否来自手机终端，主要检测特殊的头信息，以及user-Agent这个header

public static boolean isMobileDevice(HttpServletRequest request){
boolean b = false;
boolean pcFlag = false;
boolean mobileFlag = false;
String via = request.getHeader("Via");
String userAgent = request.getHeader("user-agent");
for (int i = 0; via!=null && !via.trim().equals("") && i < mobileGateWayHeaders.length; i++) {
if(via.contains(mobileGateWayHeaders[i])){
mobileFlag = true;
break;
}
}
for (int i = 0;!mobileFlag && userAgent!=null && !userAgent.trim().equals("") && i < mobileUserAgents.length; i++) {
if(userAgent.contains(mobileUserAgents[i])){
mobileFlag = true;
break;
}
}
for (int i = 0; userAgent!=null && !userAgent.trim().equals("") && i < pcHeaders.length; i++) {
if(userAgent.contains(pcHeaders[i])){
pcFlag = true;
break;
}
}
if(mobileFlag==true && pcFlag==false){
b=true;
}
return b;//false pc true shouji

}