java通过浏览器请求头（User

个人博客 地址:http://www.wenhaofan.com/article/20181125220342

在开发AutuBlog项目时需要做后台的登录记录，想起浏览器的User-Agent，于是尝试从浏览器的请求头中获取一些有用的信息。

通过总结大量请求头数据写出以下正则

^Mozilla/\d\.\d\s+\(+.+?\)

该正则含义为

    以Mozilla/开头+浏览器版本格式为数字.数字+空格+(+任意字符串+匹配第一个)

测试数据

Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_4) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/56.0.2924.87 Safari/537.36

Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/52.0.2743.116 Safari/537.36

Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:36.0) Gecko/20100101 Firefox/36.0

Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/35.0.1916.153 Safari/537.36

经测试可以顺利的获取到设备 以及操作系统信息

完整工具类代码如下

1package com.autu.common.kit;
2
3import java.util.regex.Matcher;
4import java.util.regex.Pattern;
5
6import javax.servlet.http.HttpServletRequest;
7
8public class AgentUserKit {
9	private static String pattern = "^Mozilla/\\d\\.\\d\\s+\\(+.+?\\)";
10	private static String pattern2 = "\\(+.+?\\)";
11	private static Pattern r = Pattern.compile(pattern);
12	private static Pattern r2 = Pattern.compile(pattern2);
13
14	public static String getDeviceInfo(HttpServletRequest request) {
15		String userAgent = request.getHeader("User-Agent");
16		return getDeviceInfo(userAgent);
17	}
18
19	private static String getDeviceInfo(String userAgent) {
20		Matcher m = r.matcher(userAgent);
21		String result = null;
22		if (m.find()) {
23			result = m.group(0);
24		}
25
26		Matcher m2 = r2.matcher(result);
27		if (m2.find()) {
28			result = m2.group(0);
29		}
30		result = result.replace("(", "");
31		result = result.replace(")", "");
32		return filterDeviceInfo(result);
33	}
34
35	public static String filterDeviceInfo(String result) {
36		if (StrKit.isBlank(result)) {
37			return null;
38		}
39		result = result.replace(" U;", "");
40		result = result.replace(" zh-cn;", "");
41		return result;
42	}
43
44	public static void main(String[] args) {
45		System.out.println(getDeviceInfo(
46				"Mozilla/5.0 (Linux; U; Android 7.0; zh-cn; MI 5s Build/NRD90M) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/61.0.3163.128 Mobile Safari/537.36 XiaoMi/MiuiBrowser/10.2.2"));
47	}
48
49}

如果有发现不能匹配的请求头欢迎留言