本文主要是介绍IPUtils工具类，希望对大家解决编程问题提供一定的参考价值，需要的开发者们随着小编来一起学习吧！
import lombok.extern.slf4j.Slf4j;
import org.apache.commons.lang3.StringUtils;
import javax.servlet.http.HttpServletRequest;/*** 获取Ip**/
@Slf4j
public class IpUtils {/*** 获取IP地址* <p>* 使用Nginx等反向代理软件， 则不能通过request.getRemoteAddr()获取IP地址* 如果使用了多级反向代理的话，X-Forwarded-For的值并不止一个，而是一串IP地址，X-Forwarded-For中第一个非unknown的有效IP字符串，则为真实IP地址*/public static String getIpAddr(HttpServletRequest request) {String ip = null, unknown = "unknown", seperator = ",";int maxLength = 15;try {ip = request.getHeader("x-forwarded-for");if (StringUtils.isEmpty(ip) || unknown.equalsIgnoreCase(ip)) {ip = request.getHeader("Proxy-Client-IP");}if (StringUtils.isEmpty(ip) || ip.length() == 0 || unknown.equalsIgnoreCase(ip)) {ip = request.getHeader("WL-Proxy-Client-IP");}if (StringUtils.isEmpty(ip) || unknown.equalsIgnoreCase(ip)) {ip = request.getHeader("HTTP_CLIENT_IP");}if (StringUtils.isEmpty(ip) || unknown.equalsIgnoreCase(ip)) {ip = request.getHeader("HTTP_X_FORWARDED_FOR");}if (StringUtils.isEmpty(ip) || unknown.equalsIgnoreCase(ip)) {ip = request.getRemoteAddr();}} catch (Exception e) {log.error("IpUtils ERROR ", e);}// 使用代理，则获取第一个IP地址if (StringUtils.isEmpty(ip) && ip.length() > maxLength) {int idx = ip.indexOf(seperator);if (idx > 0) {ip = ip.substring(0, idx);}}return ip;}/*** 获取ip地址** @return*/public static String getIpAddr() {HttpServletRequest request = HttpContextUtils.getHttpServletRequest();return getIpAddr(request);}
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