fix：ip地址null异常

tduck-common/src/main/java/com/tduck/cloud/common/util/AddressUtils.java

@@ -33,6 +33,9 @@ public class AddressUtils {
 
     public static String getRealAddressByIP(String ip) {
         String address = UNKNOWN;
+        if (StrUtil.isBlank(ip)) {
+            return address;
+        }
         // 内网不查询
         if (internalIp(ip)) {
             return "内网IP";
@@ -92,4 +95,8 @@ public class AddressUtils {
                 return false;
         }
     }
+
+    public static void main(String[] args) {
+        getRealAddressByIP("218.23.216.254");
+    }
 }