消除魔法值

src/main/java/com/lq/webUtil/util/IPUtil.java

@@ -9,16 +9,21 @@ import java.net.UnknownHostException;
  */
 public class IPUtil {
 
+    /**
+     * 未知ip
+     */
+    public static final String IP_UNKNOWM = "unknown";
+
     public static String getIP(HttpServletRequest request){
 
         String ip = request.getHeader("x-forwarded-for");
-        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
+        if(ip == null || ip.length() == 0 || IP_UNKNOWM.equalsIgnoreCase(ip)){
             ip = request.getHeader("Proxy-Client-IP");
         }
-        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
+        if(ip == null || ip.length() == 0 || IP_UNKNOWM.equalsIgnoreCase(ip)){
             ip = request.getHeader("WL-Proxy-Client-IP");
         }
-        if(ip == null || ip.length() == 0 || "unknown".equalsIgnoreCase(ip)){
+        if(ip == null || ip.length() == 0 || IP_UNKNOWM.equalsIgnoreCase(ip)){
             ip = request.getRemoteAddr();
         }
         return "0:0:0:0:0:0:0:1".equals(ip) ?"127.0.0.1":ip;