diff --git a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcTypeMapping.java b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcTypeMapping.java
index 14eb7d00..3f8f3e50 100644
--- a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcTypeMapping.java
+++ b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcTypeMapping.java
@@ -1,17 +1,17 @@
-/**
- * Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
- * <p>
- * Licensed under the Apache License, Version 2.0 (the "License");
- * you may not use this file except in compliance with the License.
- * You may obtain a copy of the License at
- * <p>
- * http://www.apache.org/licenses/LICENSE-2.0
- * <p>
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS,
- * 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.
+/*
+ *  Copyright (c) 2022-2023, Mybatis-Flex (fuhai999@gmail.com).
+ *  <p>
+ *  Licensed under the Apache License, Version 2.0 (the "License");
+ *  you may not use this file except in compliance with the License.
+ *  You may obtain a copy of the License at
+ *  <p>
+ *  http://www.apache.org/licenses/LICENSE-2.0
+ *  <p>
+ *  Unless required by applicable law or agreed to in writing, software
+ *  distributed under the License is distributed on an "AS IS" BASIS,
+ *  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.
  */
 package com.mybatisflex.codegen.dialect;
 
@@ -20,8 +20,14 @@ import com.mybatisflex.core.util.StringUtil;
 import java.util.HashMap;
 import java.util.Map;
 
+/**
+ * 字段类型映射。
+ */
 public class JdbcTypeMapping {
 
+    private JdbcTypeMapping() {
+    }
+
     private static final Map<String, String> mapping = new HashMap<>();
 
     static {
@@ -50,9 +56,9 @@ public class JdbcTypeMapping {
         registerMapping("java.time.LocalDate", "java.util.Date");
     }
 
-
     static String getType(String jdbcType) {
         String registered = mapping.get(jdbcType);
         return StringUtil.isNotBlank(registered) ? registered : jdbcType;
     }
+
 }