一个非常愚蠢的错误

今天使用spring mvc搭建了一个简单的demo，但是发现spring容器始终不创建bean，控制台也不打印任何错误，检查了许久的配置文件都没有发现错误。

然后我在springmvc-servlet.xml中又加入了一个拦截器，开始报错：

 

org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.handler.MappedInterceptor#1': Cannot create inner bean 'com.youyuan.interceptors.AuthInterceptor#0' of type [com.youyuan.interceptors.AuthInterceptor] while setting constructor argument; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.youyuan.interceptors.AuthInterceptor] for bean with name 'com.youyuan.interceptors.AuthInterceptor#0' defined in ServletContext resource [/WEB-INF/springmvc-servlet.xml]; nested exception is java.lang.ClassNotFoundException: com.youyuan.interceptors.AuthInterceptor
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:547)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:475)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:304)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:228)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:300)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:195)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:703)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:760)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:482)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:403)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:306)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:106)

 

于是我意识到容器找不到class文件，重新检查了一下我的class路径，发现是放在了

demo/WebRoot/classes而tomcat插件默认检查的class路径是/WebRoot/WEB-INF/classes

eclipse默认是放在build/classes，我之前曾经修改过这个路径，但是中间少写了WEB-INF而我并没有发现这也造成我没有想到是class文件路径造成的问题，结果为这个问题检查了一天，做下记录，引以为戒！