How to resolve the issue when the @Transactional annotation in Spring is not functioning?

If the @Transactional annotation of Spring is not working, there are several possible solutions:

1. Configuration check: Verify if the transaction manager is enabled in the Spring configuration file. You can enable the transaction manager by adding the following content in the configuration file.

<tx:annotation-driven/>

1. Check Spring component scanning: Make sure that component scanning is configured in the Spring configuration file. Without this configuration, Spring will not be able to scan for classes with the @Transactional annotation.

<context:component-scan base-package="your.package.name" />

1. Check transaction manager configuration: Verify if the transaction manager is correctly configured. Choose the appropriate transaction manager based on the database type (e.g. DataSourceTransactionManager).

<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <property name="dataSource" ref="dataSource" />
</bean>

1. Check the placement of transactional annotations: Verify that the @Transactional annotation is correctly added to the methods or classes that require transaction management. If the annotation is added to a class, ensure that the methods inside it invoke methods with the @Transactional annotation.
2. Check exception handling: Verify if the @Transactional annotation correctly handles exceptions. If an unchecked exception (such as RuntimeException) is thrown within the method, the transaction may be rolled back. If a checked exception (such as Exception) is thrown, the transaction may not be rolled back and should be handled according to the specific situation.

If the above methods still do not work, you can try using Spring’s programmatic transaction management approach, which involves writing code to implement transaction control instead of using annotations.