diff --git a/src/main/java/com/example/springdemo/dao/impl/CommonDao.java b/src/main/java/com/example/springdemo/dao/impl/CommonDao.java
index 576310e..07337e1 100644
--- a/src/main/java/com/example/springdemo/dao/impl/CommonDao.java
+++ b/src/main/java/com/example/springdemo/dao/impl/CommonDao.java
@@ -7,7 +7,7 @@ import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 
-public class CommonDao<T> {
+public class CommonDao {
     DataBaseUtil dataBaseUtil = new DataBaseUtil();
     public int delete(Connection ct, PreparedStatement ps, ResultSet rs,
                              String sql, Long id) {