diff --git a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcDialect.java b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcDialect.java
index 0394a4da..29d2c907 100644
--- a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcDialect.java
+++ b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/dialect/JdbcDialect.java
@@ -47,6 +47,7 @@ public abstract class JdbcDialect implements IDialect {
 
                 column.setAutoIncrement(columnMetaData.isAutoIncrement(i));
 
+                column.setNullable(columnMetaData.isNullable(i));
                 //注释
                 column.setComment(columnRemarks.get(column.getName()));
 
diff --git a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Column.java b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Column.java
index 1fc07bb0..4c22a873 100644
--- a/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Column.java
+++ b/mybatis-flex-codegen/src/main/java/com/mybatisflex/codegen/entity/Column.java
@@ -49,6 +49,11 @@ public class Column {
      */
     private String comment;
 
+    /**
+     * 是否可为空。
+     */
+    private Integer nullable;
+
     /**
      * 是否为主键。
      */
@@ -103,6 +108,14 @@ public class Column {
         this.comment = comment;
     }
 
+    public Integer getNullable() {
+        return nullable;
+    }
+
+    public void setNullable(Integer nullable) {
+        this.nullable = nullable;
+    }
+
     public boolean isPrimaryKey() {
         return isPrimaryKey;
     }