fix: IP采集方法调整

src/main/java/com/hz/employmentsite/util/ip/IpUtils.java

@@ -27,13 +27,28 @@ public class IpUtils {
         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
             ip = request.getHeader("X-Real-IP");
         }
-
         if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)) {
             ip = request.getRemoteAddr();
         }
-        return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : EscapeUtil.clean(ip);
+        if ("0:0:0:0:0:0:0:1".equals(ip)) {
+            ip = "127.0.0.1";
+        }
+
+        // 提取第一个非 "unknown" 的 IP 地址，防止用户端使用多重代理时IP为多个
+        if (ip != null && ip.contains(",")) {
+            String[] ips = ip.split(",");
+            for (String singleIp : ips) {
+                if (!"unknown".equalsIgnoreCase(singleIp.trim())) {
+                    ip = singleIp.trim();
+                    break;
+                }
+            }
+        }
+
+        return EscapeUtil.clean(ip);
     }
 
+
     public static boolean internalIp(String ip) {
         byte[] addr = textToNumericFormatV4(ip);
         return internalIp(addr) || "127.0.0.1".equals(ip);