diff --git a/src/main/java/com/alibaba/excel/util/StringUtils.java b/src/main/java/com/alibaba/excel/util/StringUtils.java
index 40b77d52..b076370c 100644
--- a/src/main/java/com/alibaba/excel/util/StringUtils.java
+++ b/src/main/java/com/alibaba/excel/util/StringUtils.java
@@ -1,5 +1,6 @@
 package com.alibaba.excel.util;
-/*
+
+/**
  * Licensed to the Apache Software Foundation (ASF) under one or more
  * contributor license agreements.  See the NOTICE file distributed with
  * this work for additional information regarding copyright ownership.
@@ -12,8 +13,9 @@ package com.alibaba.excel.util;
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
+ *
+ * @author Apache Software Foundation (ASF)
  */
-
 public class StringUtils {
     private StringUtils() {}
 
@@ -194,7 +196,6 @@ public class StringUtils {
         return true;
     }
 
-
     /**
      * <p>Checks if the CharSequence contains only Unicode digits.
      * A decimal point is not a Unicode digit and returns false.</p>
@@ -221,7 +222,7 @@ public class StringUtils {
      * StringUtils.isNumeric("+123") = false
      * </pre>
      *
-     * @param cs  the CharSequence to check, may be null
+     * @param cs the CharSequence to check, may be null
      * @return {@code true} if only contains digits, and is non-null
      * @since 3.0 Changed signature from isNumeric(String) to isNumeric(CharSequence)
      * @since 3.0 Changed "" to return false and not true