Consider injecting the bean as one of its interfaces or forcing the use of CGLib-based proxies by se

旧城等待， 2022-04-10 06:53 587阅读 0赞

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.

# 问题描述 #

Spring Boot 项目，启用事务支持时出现以下错误：

Error starting ApplicationContext. To display the auto-configuration report re-run your application with 'debug' enabled.

2018-12-28 09:19:09.467 ERROR 1105 --- \[          main\] o.s.b.d.LoggingFailureAnalysisReporter  :

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

APPLICATION FAILED TO START

\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*

Description:

The bean 'departmentDao' could not be injected as a 'com.wanyu.fams.dao.DepartmentDao' 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.

## 相关代码 ##

/**
     * Hello world!
     * @SpringBootApplication注释是相当于使用 @Configuration，@EnableAutoConfiguration，和@ComponentScan 会去拿起在所有的配置类和属于所述类的包。
     */
    @SpringBootApplication
    @ServletComponentScan // 不使用此注解导致项目访问后出现死循环，估计和Filter有关：at
    						// com.wanyu.frame.base.AuthFilter.doFilter(AuthFilter.java:71)
    						// ~[classes/:na]
    // @Configuration
    // @EnableAutoConfiguration
    // @EnableWebMvc // 启用后导致 /loginback 等都返回 404
    @EnableTransactionManagement  // 启用事务处理
    // @MapperScan("com.wanyu.fams.dao")
    // @ComponentScan
    // @EnableAspectJAutoProxy  不需要此注解，带有@Aspect注解的类就会被织入
    // @MapperScan(basePackages = "com.wanyu.fams.mapping")
    @EnableAsync
    public class FamsApplication extends SpringBootServletInitializer {

**也就是添加了一个注解：@EnableTransactionManagement  // 启用事务处理，启动的时候就报错了。**

# 解决方法 #

在 application.properties 或者 application.yml 配置文件中添加配置：

以下为 application.properties 中的配置方法：

#解决问题
    #Description:
    #The bean 'departmentDao' could not be injected as a 'com.wanyu.fams.dao.DepartmentDao' 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.
    spring.aop.proxy-target-class=true

application.yml 写法有点不同：

spring:
      aop:
        proxy-target-class: true

# 失败的尝试 #

有[文章][Link 1]指出：在springboot启动类中添加如下代码，最终解决问题，我尝试失败，错误依旧！

@Bean
        @ConditionalOnMissingBean
        public DefaultAdvisorAutoProxyCreator defaultAdvisorAutoProxyCreator() {
            DefaultAdvisorAutoProxyCreator daap = new DefaultAdvisorAutoProxyCreator();
            daap.setProxyTargetClass(true);
            return daap;
        }

# 相关参考： #

[springboot CGLib 方式实现AOP代理问题][springboot CGLib _AOP]

[还有另外一种可能是：启动类位置不在同级包下][Link 2]

[Link 1]: https://blog.csdn.net/lidai352710967/article/details/83791000
[springboot CGLib _AOP]: https://blog.csdn.net/huang_550/article/details/53672321
[Link 2]: https://blog.csdn.net/a307859/article/details/80507002