feat：获取真实ip

haoban-manage3-wx/src/main/java/com/gic/haoban/manage/web/utils/IPAddressUtil.java

 package com.gic.haoban.manage.web.utils;
 
+import org.apache.commons.lang3.StringUtils;
+
 import javax.servlet.http.HttpServletRequest;
+import java.net.InetAddress;
+import java.net.UnknownHostException;
 
 /**
  * @author mozhu
@@ -17,22 +21,32 @@ public class IPAddressUtil {
      * @date 2021-12-15 11:08:30
      */
     public static String getIpAddress(HttpServletRequest request) {
-        String ip = request.getHeader("x-forwarded-for");
-        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
+        String ip = request.getHeader("X-Forwarded-For");
+        if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip) || "127.0.0.1".equalsIgnoreCase(ip)) {
             ip = request.getHeader("Proxy-Client-IP");
         }
-        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
+        if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip) || "127.0.0.1".equalsIgnoreCase(ip)) {
             ip = request.getHeader("WL-Proxy-Client-IP");
         }
-        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
-            ip = request.getHeader("HTTP_CLIENT_IP");
-        }
-        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
-            ip = request.getHeader("HTTP_X_FORWARDED_FOR");
+        if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip) || "127.0.0.1".equalsIgnoreCase(ip)) {
+            ip = request.getHeader("X-Real-IP");
         }
-        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
+        if (StringUtils.isBlank(ip) || "unknown".equalsIgnoreCase(ip) || "127.0.0.1".equalsIgnoreCase(ip)) {
             ip = request.getRemoteAddr();
         }
+        if (StringUtils.isBlank(ip) || "127.0.0.1".equals(ip) || ip.contains(":")) {
+            try {
+                ip = InetAddress.getLocalHost().getHostAddress();
+            } catch (UnknownHostException e) {
+                ip = null;
+            }
+        }
+        // 对于通过多个代理的情况，第一个IP为客户端真实IP,多个IP按照','分割
+        if (StringUtils.isNotBlank(ip) && ip.length() > 15) {
+            if (ip.indexOf(",") > 0) {
+                ip = ip.substring(0, ip.indexOf(","));
+            }
+        }
         return ip;
     }
 }