Java Web应用中获取用户请求相关信息，如：IP地址、操作系统、浏览器等信息

1 引入jar包

<!--获取ip、浏览器类型-->
<dependency>
    <groupId>eu.bitwalker</groupId>
    <artifactId>UserAgentUtils</artifactId>
    <version>1.20</version>
</dependency>

2 代码

import eu.bitwalker.useragentutils.Browser;
import eu.bitwalker.useragentutils.OperatingSystem;
import eu.bitwalker.useragentutils.UserAgent;
import eu.bitwalker.useragentutils.Version;

import javax.servlet.http.HttpServletRequest;
import java.net.InetAddress;
import java.net.UnknownHostException;

/**
 * @ClassName : IpAndAddrUtil
 * @Date: 2020/12/24 9:58
 * @Description : 获取请求IP地址、浏览器相关信息
 */
public class IpAndAddrUtil {
    /**
     * @return java.lang.String
     * @Description: 获取发起请求的IP地址
     * @Param [request]
     * @Date: 2020/12/24 10:03
     **/
    public static String getIp(HttpServletRequest request) {
        // 这个一般是Nginx反向代理设置的参数
        String ip = request.getHeader("X-Real-IP");
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("X-Forwarded-For");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getHeader("WL-Proxy-Client-IP");
        }
        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
            ip = request.getRemoteAddr();
        }
        // 本机访问
        if ("localhost".equalsIgnoreCase(ip) || "127.0.0.1".equalsIgnoreCase(ip) || "0:0:0:0:0:0:0:1".equalsIgnoreCase(ip)){
            // 根据网卡取本机配置的IP
            InetAddress inet;
            try {
                inet = InetAddress.getLocalHost();
                ip = inet.getHostAddress();
            } catch (UnknownHostException e) {
                e.printStackTrace();
            }
        }
        // 处理多IP的情况（只取第一个IP）
        if (ip != null && ip.contains(",")) {
            String[] ipArray = ip.split(",");
            ip = ipArray[0];
        }
        return ip;
    }

    /**
     * @return java.lang.String
     * @Description: 获取发起请求的浏览器名称
     * @Param [request]
     * @Date: 2020/12/24 10:03
     **/
    public static String getBrowserName(HttpServletRequest request) {
        String header = request.getHeader("User-Agent");
        UserAgent userAgent = UserAgent.parseUserAgentString(header);
        Browser browser = userAgent.getBrowser();
        return browser.getName();
    }

    /**
     * @return java.lang.String
     * @Description: 获取发起请求的浏览器版本号
     * @Param [request]
     * @Date: 2020/12/24 10:03
     **/
    public static String getBrowserVersion(HttpServletRequest request) {
        String header = request.getHeader("User-Agent");
        UserAgent userAgent = UserAgent.parseUserAgentString(header);
        //获取浏览器信息
        Browser browser = userAgent.getBrowser();
        //获取浏览器版本号
        Version version = browser.getVersion(header);
        return version.getVersion();
    }

    /**
     * @return java.lang.String
     * @Description: 获取发起请求的操作系统名称
     * @Param [request]
     * @Date: 2020/12/24 10:03
     **/
    public static String getOsName(HttpServletRequest request) {
        String header = request.getHeader("User-Agent");
        UserAgent userAgent = UserAgent.parseUserAgentString(header);
        OperatingSystem operatingSystem = userAgent.getOperatingSystem();
        return operatingSystem.getName();
    }
}

原文参考：https://www.cnblogs.com/qubo520/p/10970845.html