The Save () method is called, and the page displays a successful save, but the reason why the database does not have a value

The Save () method is called on the DAO layer, and the page appears successful, but the reason that the data was not saved to the database when it was looked up in the database could be:

Whether the annotation @transactional is added to the 1.Service layer before invoking the Save () method in the DAO layer, all updates to the database should be annotated with that sentence.

2. View the Application.xml file under the Web-inf folder in the project to see <tx:annotation-driven transaction-manager= "TransactionManager"/> The attribute is missing from the label proxy-target-class= "true"

3. See if the sequence name in the entity layer is consistent with the sequence name of the table in the database.

The Save () method is called, and the page displays a successful save, but the reason why the database does not have a value