修改取IP方法

pom.xml

@@ -108,6 +108,11 @@
 			<artifactId>commons-net</artifactId>
 			<version>3.4</version>
 		</dependency>
+		<dependency>
+			<groupId>org.apache.commons</groupId>
+			<artifactId>commons-lang3</artifactId>
+			<version>3.12.0</version>
+		</dependency>
 		<dependency>
 			<groupId>dom4j</groupId>
 			<artifactId>dom4j</artifactId>
@@ -151,7 +156,7 @@
 		</dependency>
 		<!-- 简体转繁体end -->
 
-	<!-- 图片压缩   https://www.cnblogs.com/yinjing/p/12157562.html-->
+		<!-- 图片压缩 https://www.cnblogs.com/yinjing/p/12157562.html -->
 		<dependency>
 			<groupId>net.coobird</groupId>
 			<artifactId>thumbnailator</artifactId>

src/main/java/com/egolm/common/web/ServletUtil.java

@@ -13,29 +13,78 @@ import java.util.Map.Entry;
 
 import javax.servlet.http.HttpServletRequest;
 
+import org.apache.commons.lang3.StringUtils;
+
 import com.egolm.common.StringUtil;
 import com.egolm.common.exception.PluginException;
 
 public class ServletUtil {
 
 	public static String remoteIp(HttpServletRequest request) {
-		String ip = request.getHeader("X-Real_IP");
-		if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {
-			ip = request.getHeader("X-Forwarded-For");
+		 if (request == null)
+	        {
+	            return "unknown";
 	        }
-		if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {
+	        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 || ip.equalsIgnoreCase("unknown")) {
+	        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
+	        {
+	            ip = request.getHeader("X-Forwarded-For");
+	        }
+	        if (ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip))
+	        {
 	            ip = request.getHeader("WL-Proxy-Client-IP");
 	        }
-		if (ip == null || ip.length() == 0 || ip.equalsIgnoreCase("unknown")) {
+	        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();
 	        }
-		String[] ips = ip.trim().split(", ");
-		return ips[ips.length - 1].trim();
+
+	        return "0:0:0:0:0:0:0:1".equals(ip) ? "127.0.0.1" : getMultistageReverseProxyIp(ip); 
 	}
 	
+	/**
+     * 从多级反向代理中获得第一个非unknown IP地址
+     *
+     * @param ip 获得的IP地址
+     * @return 第一个非unknown IP地址
+     */
+    public static String getMultistageReverseProxyIp(String ip)
+    {
+        // 多级反向代理检测
+        if (ip != null && ip.indexOf(",") > 0)
+        {
+            final String[] ips = ip.trim().split(",");
+            for (String subIp : ips)
+            {
+                if (false == isUnknown(subIp))
+                {
+                    ip = subIp;
+                    break;
+                }
+            }
+        }
+        return StringUtils.substring(ip, 0, 255);
+    } 
+    
+    /**
+     * 检测给定字符串是否为未知，多用于检测HTTP请求相关
+     *
+     * @param checkString 被检测的字符串
+     * @return 是否未知
+     */
+    public static boolean isUnknown(String checkString)
+    {
+        return StringUtil.isBlank(checkString) || "unknown".equalsIgnoreCase(checkString);
+    } 
 	public static String getLocalIP() {
 		try {
 			return InetAddress.getLocalHost().getHostAddress();