黑马程序员Spring开启事务

1.在需要开启事务的业务上加注解@Transactional

public interface MemberService {
    @Transactional
    void transfer(String in,String out,float balance);
}

public interface LogService {
    @Transactional(propagation = Propagation.REQUIRES_NEW )
    void log(String in ,String out ,float balance );
}

@Transactional:作用是在此方法上开启事务
@Transactional(propagation = Propagation.REQUIRES_NEW )中的propagation是设置事务的传播管理,个人理解是管理多个事务的开启顺序.

2.在spring的配置类上添加注解@EnableTransactionManagement

@Configuration
@ComponentScan("com.lp")
@PropertySource("classpath:jdbc.properties")
@Import({JdbcConfig.class,MybatisConfig.class})
@EnableTransactionManagement
public class SpringConfig {
}

@EnableTransactionManagement:在spring上开启事务支持,可识别在Service方法添加的@Transactional

这样就可以开启一个简单事务