通过请求头判断是什么浏览器

public String mobile(HttpServletRequest request, HttpServletResponse response) {
String userAgent = request.getHeader("User-Agent");
if(userAgent != null) {
if(userAgent.toLowerCase().indexOf("iphone") > -1) {
return "苹果手机";
} else if(userAgent.toLowerCase().indexOf("micromessenger") > -1) {
return "微信";
} else if(userAgent.toLowerCase().indexOf("android") > -1) {
return "android手机";
}
}
return "";
}