How to use exception rollback and transactions in Sprin…

You can achieve Spring Boot exception rollback and transaction usage through the following steps:

1. Add dependencies for spring-boot-starter-data-jpa and spring-boot-starter-web.

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>

1. Add the @EnableTransactionManagement annotation to the entry class of the application to enable transaction management.

@SpringBootApplication
@EnableTransactionManagement
public class YourApplication {
    public static void main(String[] args) {
        SpringApplication.run(YourApplication.class, args);
    }
}

1. Add the @Transactional annotation to the methods where a transaction is needed, so that if an exception occurs during the method execution, the transaction will automatically be rolled back.

@Service
public class YourService {
    @Autowired
    private YourRepository yourRepository;

    @Transactional
    public void saveYourEntity(YourEntity entity) {
        yourRepository.save(entity);
    }
}

1. To customize exception rollback, you can use the @Rollback annotation. Place it on the test method, and the transaction will rollback if the test method throws a specified exception.

@SpringBootTest
@Transactional
public class YourServiceTest {
    @Autowired
    private YourService yourService;

    @Test
    @Rollback(value = true, rollbackFor = Exception.class)
    public void testSaveYourEntity() {
        // 测试代码
    }
}

By following the aforementioned steps, you can implement exception rollback and transactions in your Spring Boot application.