diff --git a/smart-admin-api-java17-springboot3/sa-base/src/main/java/net/lab1024/sa/base/module/support/codegenerator/service/CodeGeneratorService.java b/smart-admin-api-java17-springboot3/sa-base/src/main/java/net/lab1024/sa/base/module/support/codegenerator/service/CodeGeneratorService.java
index f8918480..6add843a 100644
--- a/smart-admin-api-java17-springboot3/sa-base/src/main/java/net/lab1024/sa/base/module/support/codegenerator/service/CodeGeneratorService.java
+++ b/smart-admin-api-java17-springboot3/sa-base/src/main/java/net/lab1024/sa/base/module/support/codegenerator/service/CodeGeneratorService.java
@@ -65,7 +65,7 @@ public class CodeGeneratorService {
     public List<TableColumnVO> getTableColumns(String tableName) {
         List<TableColumnVO> tableColumns = codeGeneratorDao.selectTableColumn(tableName);
         for (TableColumnVO tableColumn : tableColumns) {
-            tableColumn.setNullableFlag(!COLUMN_NULLABLE_IDENTIFY.equalsIgnoreCase(tableColumn.getIsNullable()));
+            tableColumn.setNullableFlag(COLUMN_NULLABLE_IDENTIFY.equalsIgnoreCase(tableColumn.getIsNullable()));
             tableColumn.setPrimaryKeyFlag(COLUMN_PRIMARY_KEY.equalsIgnoreCase(tableColumn.getColumnKey()));
             tableColumn.setAutoIncreaseFlag(SmartStringUtil.isNotEmpty(tableColumn.getExtra()) && COLUMN_AUTO_INCREASE.equalsIgnoreCase(tableColumn.getExtra()));
         }