spring-boot 事务异常： because it is a JDK dynamic proxy that implement

àì夳堔傛蜴生んèń 2022-06-11 06:10 200阅读 0赞

使用spring-boot做事务管理时，出现异常：The bean 'xxx' could not be injected as a 'xx.xxxx' because it is a JDK dynamic proxy that implements:

搞了半天发现是因为代理的原因；

异常信息：

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.
    2017-08-01 09:37:14.845 ERROR 12264 --- [           main] o.s.b.d.LoggingFailureAnalysisReporter   : 
    
    ***************************
    APPLICATION FAILED TO START
    ***************************
    
    Description:
    
    The bean 'AdapterSchemeVersionService' could not be injected as a 'com.yihu.hos.rest.services.standard.adapter.AdapterSchemeVersionService' because it is a JDK dynamic proxy that implements:
    
    
    Action:
    
    Consider injecting the bean as one of its interfaces or forcing the use of CGLib-based proxies by setting proxyTargetClass=true on @EnableAsync and/or @EnableCaching.

使用 @Transactional  
开启@Transactional 注解支持，两种方式，一种是通过xml的方式(如下)

<tx:annotation-driven transaction-manager="txManager"/>
        <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
            
            <property name="dataSource" ref="dataSource"/>
        </bean>

另外一种是使用 `@EnableTransactionManagement` ，将该注解标注在 `@Configuration` 类上，等价于上面的 `<tx:annotation-driven/>`  
Spring推荐奖该注解标记在类（方法）而不是接口，将注解标记在接口上时，只有使用动态代理的时候才会生效，需要标记 `proxy-target-class="true"` 或者 `mode="aspectj"，如下：`

@Configuration
    @EnableTransactionManagement(proxyTargetClass = true)
    @ComponentScan("com.yihu.hos.rest")
    public class BeanConfiguration {}

因为加了 `@Transaction` 的类会自动开启动态代理，java的代理机制主要有 JDK动态代理 和 CGLIB ，报上面的错误是因为使用了JDK动态代理机制，我尝试开启@Transaction设置`@EnableTransactionManagement(proxyTargetClass = true)`，问题解决；特此记录一下；

参考文章：http://hrps.me/2016/11/03/spring-transaction/