diff --git a/server/like-generator/src/main/java/com/mdd/generator/util/GenUtil.java b/server/like-generator/src/main/java/com/mdd/generator/util/GenUtil.java
index e2b9d503..0f90a284 100644
--- a/server/like-generator/src/main/java/com/mdd/generator/util/GenUtil.java
+++ b/server/like-generator/src/main/java/com/mdd/generator/util/GenUtil.java
@@ -255,6 +255,10 @@ public class GenUtil {
      * @return String
      */
     public static String getTableAlias(String tableName) {
+        if (StringUtils.isNull(tableName) || StringUtils.isEmpty(tableName)) {
+            return "";
+        }
+
         StringBuilder val = new StringBuilder();
         for (String name : tableName.split("_")) {
             val.append(name.charAt(0));