本工具类包含了
获取用户代理
获取用户浏览器
通过 IP 获取地址 (淘宝接口)

pom依赖

<dependency>
    <groupId>eu.bitwalker</groupId>
    <artifactId>UserAgentUtils</artifactId>
    <version>1.21</version>
</dependency>

UserAgent 工具类

import com.funtl.myshop.plus.commons.dto.IpInfo;
import eu.bitwalker.useragentutils.Browser;
import eu.bitwalker.useragentutils.UserAgent;

import javax.servlet.http.HttpServletRequest;
import java.io.BufferedReader;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

/**
 * UserAgent 工具类
 * <p>
 * Description:
 * </p>
 *
 * @author songzixian
 * @version v1.0.0
 * @date 2019-10-22 07:20:26
 * @see com.songzixian
 */
public class UserAgentUtils {

    /**
     * 获取用户代理
     *
     * @param request {@link HttpServletRequest}
     * @return {@link UserAgent}
     */
    public static UserAgent getUserAgent(HttpServletRequest request) {
        return UserAgent.parseUserAgentString(request.getHeader("User-Agent"));
    }

    /**
     * 获取用户浏览器
     *
     * @param request {@link HttpServletRequest}
     * @return {@link Browser}
     */
    public static Browser getBrowser(HttpServletRequest request) {
        return getUserAgent(request).getBrowser();
    }

    /**
     * 获取用户的 IP 地址
     *
     * @param request {@link HttpServletRequest}
     * @return {@code String} 用户 IP 地址
     */
    public static String getIpAddr(HttpServletRequest request) {
        String 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();
        }
        if ("0:0:0:0:0:0:0:1".equals(ip)) {
            ip = "127.0.0.1";
        }
        if (ip.split(",").length > 1) {
            ip = ip.split(",")[0];
        }
        return ip;
    }

    /**
     * 通过 IP 获取地址 (淘宝接口)
     *
     * @param ip {@code String} 用户 IP 地址
     * @return {@code String} 用户地址
     */
    public static IpInfo getIpInfo(String ip) {
        if ("127.0.0.1".equals(ip)) {
            ip = "127.0.0.1";
        }

        try {
            URL url = new URL("http://ip.taobao.com/service/getIpInfo.php?ip=" + ip);
            HttpURLConnection htpcon = (HttpURLConnection) url.openConnection();
            htpcon.setRequestMethod("GET");
            htpcon.setDoOutput(true);
            htpcon.setDoInput(true);
            htpcon.setUseCaches(false);

            InputStream in = htpcon.getInputStream();
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(in));
            StringBuilder temp = new StringBuilder();
            String line = bufferedReader.readLine();
            while (line != null) {
                temp.append(line).append("\r\n");
                line = bufferedReader.readLine();
            }
            bufferedReader.close();
            return MapperUtils.json2pojoByTree(temp.toString(), "data", IpInfo.class);
        } catch (Exception e) {
            return new IpInfo();
        }
    }

}