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AJAXJS Web aims to full-stack, not only the server-side framework, but also integrates the front-end library. It's written in HTML5 + Java, a successor to the JVM platform, efficient, secure, stable, cross-platform and many other advantages, but it abandoned the traditional enterprise architecture brought about by the large and bloated, emphasizing the lightweight, and fast, very suitable for the Internet fast application.

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/**
 * Copyright Sp42 [email protected]
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *    http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.ajaxjs.web;

import java.util.regex.Pattern;

import javax.servlet.http.HttpServletRequest;

/**
 * 浏览器 UA 检测
 * 
 * @author Sp42 [email protected]
 *
 */
public class UserAgent {
	/**
	 * 送入一个请求，得到  UA 标识字符串
	 * 
	 * @param request
	 *            请求对象
	 */
	public UserAgent(HttpServletRequest request) {
		String ua = request.getHeader("User-Agent");
		if (ua != null)
			this.ua = ua.toLowerCase();// 强制转换为小写字母
	}

	private String ua;

	/**
	 * 是否 IE 浏览器
	 * 
	 * @return true 表示为 IE 浏览器
	 */
	public boolean isIE() {
		return ua.contains("msie");
	}

	/**
	 * IE 8 或其以下的皆为旧版 IE
	 * 
	 * @return true 表示为旧 IE 浏览器
	 */
	public boolean isOldIE() {
		return isIE() && (ua.contains("msie 5.5") || ua.contains("msie 6.0") || ua.contains("msie 7.0") || ua.contains("msie 8.0"));
	}

	/**
	 * 是否为 Firefox 浏览器
	 * 
	 * @return true 表示为 Firefox 浏览器
	 */
	public boolean isFireFox() {
		return ua.contains("firefox");
	}

	/**
	 * 是否为 Chrome 浏览器
	 * 
	 * @return true 表示为 Chrome 浏览器
	 */
	public boolean isChrome() {
		return ua.contains("chrome");
	}

	/**
	 * 是否为安卓
	 * 
	 * @return true 表示为 Android 浏览器
	 */
	public boolean isAndroid() {
		return ua.contains("android");
	}

	/**
	 * 是否为安卓 7.x
	 * 
	 * @return true 表示为 Android 7.x 浏览器
	 */
	public boolean isAndroid_7() {
		boolean is7 = Pattern.compile("Android\\s7", Pattern.CASE_INSENSITIVE).matcher(ua).find();
		return isAndroid() && is7;
	}

	/**
	 * 是否为安卓 56.x
	 * 
	 * @return true 表示为 Android 6.x 浏览器
	 */
	public boolean isAndroid_6() {
		boolean is6 = Pattern.compile("Android\\s6", Pattern.CASE_INSENSITIVE).matcher(ua).find();
		return isAndroid() && is6;
	}

	/**
	 * 是否为安卓 5.x
	 * 
	 * @return true 表示为 Android 5.x 浏览器
	 */
	public boolean isAndroid_5() {
		boolean is5 = Pattern.compile("Android\\s5", Pattern.CASE_INSENSITIVE).matcher(ua).find();
		return isAndroid() && is5;
	}

	/**
	 * 是否为安卓 4.x
	 * 
	 * @return true 表示为 Android 4.x 浏览器
	 */
	public boolean isAndroid_4() {
		boolean is4 = Pattern.compile("Android\\s4", Pattern.CASE_INSENSITIVE).matcher(ua).find();
		return isAndroid() && is4;
	}

	/**
	 * 是否为安卓 2.x
	 * 
	 * @return true 表示为 Android 2.x 浏览器
	 */
	public boolean isAndroid_2() {
		boolean is2 = Pattern.compile("Android\\s2", Pattern.CASE_INSENSITIVE).matcher(ua).find();
		return isAndroid() && is2;
	}

	/**
	 * 是否为安卓 2.2.x
	 * 
	 * @return true 表示为 Android 2.2.x 浏览器
	 */
	public boolean isAndroid_2_2() {
		boolean is2_2 = Pattern.compile("Android\\s2\\.2", Pattern.CASE_INSENSITIVE).matcher(ua).find();
		return isAndroid() && is2_2;
	}

	/**
	 * 是否为 iPhone
	 * 
	 * @return true 表示为 iPhone Safari 浏览器
	 */
	public boolean isIPhone() {
		return ua.contains("iphone");
	}

	/**
	 * 是否为 iPad
	 * 
	 * @return true 表示为 iPad Safari 浏览器
	 */
	public boolean isIPad() {
		return ua.contains("ipad");
	}

	/**
	 * 是否为 iOS 系统
	 * 
	 * @return true 表示为 iOS 系统
	 */
	public boolean isIOS() {
		return isIPad() || isIPhone();
	}

	/**
	 * 是否为 WinPhone 手机
	 * 
	 * @return true 表示为 WinPhone 手机
	 */
	public boolean isWinPhone() {
		return ua.contains("windows phone");
	}

	/**
	 * 是否为手机
	 * 
	 * @return true 表示为手机
	 */
	public boolean isPhone() {
		return isAndroid() || isIOS() || isWinPhone();
	}
}