Java教程

Appearance

启动时报错，加载了两个相同的bean：requestMappingHandlerMapping,controllerEndpointHandlerMapping ​

问题 ​

启动时报错，加载了两个相同的bean：requestMappingHandlerMapping,controllerEndpointHandlerMapping

提供详细日志、截图、回显步骤 ​

PermitAllUrlResolver.class]: Invocation of init method failed; nested exception is org.springframework.beans.factory.NoUniqueBeanDefinitionException: No qualifying bean of type 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping' available: expected single matching bean but found 2: requestMappingHandlerMapping,controllerEndpointHandlerMapping

解决方案 ​

  • 位置：PermitAllUrlResolver类中afterPropertiesSet()方法

  • 修改前代码：RequestMappingHandlerMapping mapping = applicationContext.getBean(RequestMappingHandlerMapping.class);

  • 修改后代码：RequestMappingHandlerMapping mapping = applicationContext.getBean("requestMappingHandlerMapping",RequestMappingHandlerMapping.class);

  • 说明：原来只使用了class类型获取bean，但是controllerEndpointHandlerMapping是requestMappingHandlerMapping的子类，使用applicationContext.getBean会返回两个bean导致报错，所以在applicationContext.getBean获取bean时加入name属性即可解决问题。