聊聊spring @Transactional 事务无法使用的可能原因

org.springframework.transaction.annotation.Transactional

javax.transaction.Transactional

<tx:annotation-driven transaction-manager="transactionManager" proxy-target-class="true"/>

@EnableTransactionManagement

<context:component-scan base-package="com.xxx.xxx" ></context:component-scan>

@EnableTransactionManagement

spring.jpa.properties.hibernate.dialect=org.hibernate.dialect.MySQL5InnoDBDialect

protected TransactionAttribute computeTransactionAttribute(Method method,
    Class<?> targetClass) {
        // Don't allow no-public methods as required.
        if (allowPublicMethodsOnly() && !Modifier.isPublic(method.getModifiers())) {
   return null;
  }
 }

@Transactional (rollbackFor=Exception.class)

//在类上@Transactional 说明,所以public都是有事务的
@Service
@Transactional
public class StudentService {

	@Autowired
	private GroupRepository groupRepository;
	@Autowired
	private InstituteRepository instituteRepository;

	public void initStudent() {
		Institute institute = Institute.builder().build();
		institute.setCode("TEST4");
		instituteRepository.save(institute);
		
		// 这里自己处理异常,spring不会知道存在异常,无法进行事务回滚
		try {
			throw new RuntimeException("运行时异常----------看事务是否起作用");
		} catch (Exception e) {
			e.printStackTrace();
		}

	}
}

public void initStudent() throws Exception{
  Institute institute = Institute.builder().build();
  institute.setCode("TEST4");
  instituteRepository.save(institute);
  groupRepository.save(group);
  
  //不进行异常处理,而是把异常抛出
  throw new RuntimeException("运行时异常----------看事务是否起作用");
 }

@Service
public class StudentService {

 @Autowired
 private GroupRepository groupRepository;
 @Autowired
 private InstituteRepository instituteRepository;
 
 //initStudent() 加上@Transactional(),则会回滚
 public void initStudent() throws Exception{
  Institute institute = Institute.builder().build();
  institute.setCode("TEST4");
  instituteRepository.save(institute);
  
  //虽然 initGroup() 有 @Transactional() 但是事务还是没起作用
  initGroup();
  throw new RuntimeException("运行时异常----------看事务是否起作用");
 }
 
 @Transactional()
 public void initGroup() {
  Group group = Group.builder().academic_year(2015).build();
  group.setCode("ELSE1");
  groupRepository.save(group);
 }
}