获取客户端真实的IP

scalad · scalad · commit 1663ad43caef · 2016-12-21T11:48:36.000+08:00
diff --git a/Java_Request_GetIP/README.md b/Java_Request_GetIP/README.md
@@ -0,0 +1,47 @@
+###获取客户端真实的IP地址
+
+```Java
+
+    /**
+     * 
+     * @description：获取客户端真实IP
+     * @param request
+     * @return
+     */
+    public static String getIpAddr(HttpServletRequest request)
+    {
+
+        if (request == null)
+        {
+            return "";
+        }
+        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 (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");
+        }
+        // 如果是多级代理，那么取第一个ip为客户ip
+        if (ip != null && ip.indexOf(",") != -1)
+        {
+            ip = ip.substring(ip.lastIndexOf(",") + 1, ip.length()).trim();
+        }
+        return ip;
+    }
+```
