消息 Servlet[spring]的Servlet.init（）引发异常

Question

类型 异常报告

消息 Servlet[spring]的Servlet.init（）引发异常

描述 服务器遇到一个意外的情况，阻止它完成请求。

例外情况

javax.servlet.ServletException: Servlet[spring]的Servlet.init（）引发异常
org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:543)
org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:81)
org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:690)
org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343)
org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:615)
org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:65)
org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:818)
org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1626)
org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
java.lang.Thread.run(Thread.java:745)
根本原因。

Answer 1

从异常信息看，根本原因是 org.springframework.beans.factory.BeanCreationException，即在创建 Spring Bean 时发生异常。

具体原因是:

Error creating bean with name 'org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping': Initialization of bean failed; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.handler.MappedInterceptor#2': Cannot create inner bean 'cn.crap.framework.interceptor.AuthInterceptor#0' of type [cn.crap.framework.interceptor.AuthInterceptor] while setting constructor argument; nested exception is org.springframework.beans.factory.UnsatisfiedDependencyException: Error creating bean with name 'cn.crap.framework.interceptor.AuthInterceptor#0': Unsatisfied dependency expressed through field 'userCache'; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter] for bean with name 'org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter#0' defined in class path resource [springMVC.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter

从这个异常信息中可以看到有关Bean创建失败的详细信息，其中关键部分是：

Cannot find class [org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter] for bean with name 'org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter#0' defined in class path resource [springMVC.xml]; nested exception is java.lang.ClassNotFoundException: org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter

这表明在 Spring 配置文件 springMVC.xml 中定义的一个Bean需要使用类 org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter，但是这个类在 classpath 中找不到。

可能的解决方法：

1. 检查类路径（classpath）： 确保项目的类路径中包含了所需的Spring库以及其他依赖。确保org.springframework.web.servlet.mvc.annotation.AnnotationMethodHandlerAdapter类可以被正确加载。

2. **更