Spring Boot中不需要加 @EnableTransactionManagement 来开启事务

1 Spring中 纯XML 配置事务

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2 Spring中 XML+注解 配置事务

一般xml里面配置粗粒度的控制，然后使用注解

3 Spring中 纯注解 配置事务

@Configuration //声明配置类
@MapperScan("cn.yuanyu.tx.mapper")
@EnableTransactionManagement // 开启事务注解，等同于配置文件
public class MybatisPlusConfiguration {

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4 Spirng Boot 中无需做任何事情

~/org/springframework/boot/spring-boot-autoconfigure/2.3.0.RELEASE/spring-boot-autoconfigure-2.3.0.RELEASE.jar!/META-INF/spring.factories

# Auto Configure
org.springframework.boot.autoconfigure.transaction.TransactionAutoConfiguration,\

/**
 * Auto-configuration for Spring transaction.
 */
@Configuration(proxyBeanMethods = false)
@ConditionalOnClass(PlatformTransactionManager.class)
@AutoConfigureAfter({JtaAutoConfiguration.class, HibernateJpaAutoConfiguration.class, DataSourceTransactionManagerAutoConfiguration.class, Neo4jDataAutoConfiguration.class})
@EnableConfigurationProperties(TransactionProperties.class)
public class TransactionAutoConfiguration {
    //...
    @Configuration(proxyBeanMethods = false)
    @ConditionalOnBean(TransactionManager.class)
    @ConditionalOnMissingBean(AbstractTransactionManagementConfiguration.class)
    public static class EnableTransactionManagementConfiguration {
        @Configuration(proxyBeanMethods = false)
        @EnableTransactionManagement(proxyTargetClass = false) //这里其实以及加了
        @ConditionalOnProperty(prefix = "spring.aop", name = "proxy-target-class", havingValue = "false", matchIfMissing = false)
        public static class JdkDynamicAutoProxyConfiguration {}
        @Configuration(proxyBeanMethods = false)
        @EnableTransactionManagement(proxyTargetClass = true)  //这里其实以及加了
        @ConditionalOnProperty(prefix = "spring.aop", name = "proxy-target-class", havingValue = "true", matchIfMissing = true)
        public static class CglibAutoProxyConfiguration {}
    }
}

同理不需要加 @EnableAspectJAutoProxy 来开启aop

@Configuration(proxyBeanMethods = false)
@ConditionalOnProperty(prefix = "spring.aop", name = "auto", havingValue = "true", matchIfMissing = true)
public class AopAutoConfiguration {
    @Configuration(proxyBeanMethods = false)
    @ConditionalOnClass(Advice.class)
    static class AspectJAutoProxyingConfiguration {
        @Configuration(proxyBeanMethods = false)
        @EnableAspectJAutoProxy(proxyTargetClass = false)
        @ConditionalOnProperty(prefix = "spring.aop", name = "proxy-target-class", havingValue = "false", matchIfMissing = false)
        static class JdkDynamicAutoProxyConfiguration {}
        @Configuration(proxyBeanMethods = false)
        @EnableAspectJAutoProxy(proxyTargetClass = true)
        @ConditionalOnProperty(prefix = "spring.aop", name = "proxy-target-class", havingValue = "true", matchIfMissing = true)
        static class CglibAutoProxyConfiguration {}
    }
}