Java根据UA判断手机，平板，PC登录

/** * 校验是否手机端 * @param request * @return */public boolean isFromMobile(HttpServletRequest request) {//1. 获得请求UAString userAgent = request.getHeader("USER-AGENT").toLowerCase();//2.声明手机和平板的UA的正则表达式// \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 phoneReg = "\\b(ip(hone|od)|android|opera m(ob|in)i" + "|windows (phone|ce)|blackberry"+ "|s(ymbian|eries60|amsung)|p(laybook|alm|rofile/midp" + "|laystation portable)|nokia|fennec|htc[-_]"+ "|mobile|up.browser|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";String tableReg = "\\b(ipad|tablet|(Nexus 7)|up.browser" + "|[1-4][0-9]{2}x[1-4][0-9]{2})\\b";// 3.移动设备正则匹配：手机端、平板Pattern phonePat = Pattern.compile(phoneReg, Pattern.CASE_INSENSITIVE);Pattern tablePat = Pattern.compile(tableReg, Pattern.CASE_INSENSITIVE);if (null == userAgent) {userAgent = "";}// 4.匹配Matcher matcherPhone = phonePat.matcher(userAgent);Matcher matcherTable = tablePat.matcher(userAgent);if (matcherPhone.find() || matcherTable.find()) {return true; //来自手机或者平板} else {return false; //来自PC}}