SpringBoot循环依赖

问题描述

SpringBoot + Shiro + Swagger 配置完成，启动项目抛出如下错误信息：

Description:

The dependencies of some of the beans in the application context form a cycle:

   objectMapperConfigurer defined in class path resource [springfox/documentation/spring/web/SpringfoxWebMvcConfiguration.class]
      ↓
   authorizationAttributeSourceAdvisor defined in class path resource [org/apache/shiro/spring/boot/autoconfigure/ShiroAnnotationProcessorAutoConfiguration.class]
┌─────┐
|  securityManager defined in class path resource [com/bbzd/mes/shiro/config/ShiroConfig.class]
↑     ↓
|  shiroFilterFactoryBean defined in class path resource [com/bbzd/mes/shiro/config/ShiroConfig.class]
└─────┘

原因

循环依赖其实就是循环引用，也就是两个或则两个以上的bean互相持有对方，最终形成闭环。比如A依赖于B，B依赖于C，C又依赖于A。如下图：

解决办法

找到重复，将@Bean 改为 @Autowired