新项目中使用了neo4j，支持事务，但是@Transactional注解不支持多个事务管理器，默认使用transactionManager，需要实现@Transactional管理mysql事务，我的做法是，定义@MultiTransaction注解，使用@Around环绕通知，一起提交或回滚neo4j事务和mysql事务

1.依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-neo4j</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-jpa</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-aop</artifactId>
</dependency>

2.定义注解

@Target({ElementType.METHOD, ElementType.TYPE})
@Retention(RetentionPolicy.RUNTIME)
public @interface MultiTransaction {
        //这里可以自定义参数
}

3.定义Aspect

@Aspect
@Component
public class TransactionAspect {


    /**
     * 定义neo4j事务管理器
     * @param sessionFactory
     * @return
     */
    @Bean("neo4jTransactionManager")
    public Neo4jTransactionManager neo4jTransactionManager(SessionFactory sessionFactory) {
        return new Neo4jTransactionManager(sessionFactory);
    }

    /**
     * 定义mysql事务管理器，必须有transactionManager作为默认事务管理器
     * @param emf
     * @return
     */
    @Bean("transactionManager")
    public JpaTransactionManager jpaTransactionManager(EntityManagerFactory emf) {
        return new JpaTransactionManager(emf);
    }


    @Autowired
    @Qualifier("neo4jTransactionManager")
    Neo4jTransactionManager neo4jTransactionManager;
    @Autowired
    @Qualifier("transactionManager")
    JpaTransactionManager jpaTransactionManager;

    @Around("@annotation(MultiTransaction)")
    public Object multiTransaction(ProceedingJoinPoint proceedingJoinPoint) {
        TransactionStatus neo4jTransactionStatus = neo4jTransactionManager.getTransaction(new DefaultTransactionDefinition());
        TransactionStatus jpaTransactionStatus = jpaTransactionManager.getTransaction(new DefaultTransactionDefinition());
        try {
            Object obj = proceedingJoinPoint.proceed();
            //注意：事务之间必须是包含关系，不能交叉
            jpaTransactionManager.commit(jpaTransactionStatus);
            neo4jTransactionManager.commit(neo4jTransactionStatus);
            return obj;
        } catch (Throwable throwable) {
            jpaTransactionManager.rollback(jpaTransactionStatus);
            neo4jTransactionManager.rollback(neo4jTransactionStatus);
            throw new RuntimeException(throwable);
        }
    }
}

4.使用

@RequestMapping("/test")
@MultiTransaction
public void test() {
        //
 }