我正在编写 Spring MVC 并遇到以下错误:

18:34:44,999 WARN [org.springframework.web.context.support.XmlWebApplicationContext] (MSC service thread 1-1) Exception encountered during context initialization - cancelling refresh attempt: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping#0': Initialization of bean failed; nested exception is org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.icumed.beans.RequestInterfaceImpl] for bean with name 'scopedTarget.requestscope' defined in ServletContext resource [/WEB-INF/FetchDevice-servlet.xml]; nested exception is java.lang.ClassNotFoundException: com.icumed.beans.RequestInterfaceImpl from [Module "deployment.6.BeanScopingRequestSession.war:main" from Service Module Loader] Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.icumed.beans.RequestInterfaceImpl] for bean with name 'scopedTarget.requestscope' defined in ServletContext resource [/WEB-INF/FetchDevice-servlet.xml]; nested exception is java.lang.ClassNotFoundException: com.icumed.beans.RequestInterfaceImpl from [Module "deployment.6.BeanScopingRequestSession.war:main" from Service Module Loader] Related cause: org.springframework.beans.factory.CannotLoadBeanClassException: Cannot find class [com.icumed.beans.SessionInterfaceImpl] for bean with name 'scopedTarget.sessionscope' defined in ServletContext resource [/WEB-INF/FetchDevice-servlet.xml]; nested exception is java.lang.ClassNotFoundException: com.icumed.beans.SessionInterfaceImpl from [Module "deployment.6.BeanScopingRequestSession.war:main" from Service Module Loader]

我的目录结构:

web.xml

<?xml version="1.0" encoding="UTF-8"?> 
<web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
        xmlns="http://java.sun.com/xml/ns/javaee" 
        xmlns:web="http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
        xsi:schemaLocation="http://java.sun.com/xml/ns/javaee 
                            http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" 
        id="WebApp_ID" version="2.5"> 
  <display-name>ICUMED-Req-Session-scope</display-name> 
  <servlet> 
    <servlet-name>FetchDevice</servlet-name> 
    <servlet-class> 
         org.springframework.web.servlet.DispatcherServlet 
      </servlet-class> 
    <load-on-startup>1</load-on-startup> 
  </servlet> 
  <servlet-mapping> 
    <servlet-name>FetchDevice</servlet-name> 
    <url-pattern>/</url-pattern> 
  </servlet-mapping> 
  <listener> 
    <listener-class> 
        org.springframework.web.context.request.RequestContextListener 
    </listener-class> 
  </listener> 
</web-app> 

FetchDevice-servlet.xml

<beans xmlns="http://www.springframework.org/schema/beans" 
   xmlns:context="http://www.springframework.org/schema/context" 
   xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
   xmlns:mvc="http://www.springframework.org/schema/mvc" 
   xmlns:aop="http://www.springframework.org/schema/aop" 
   xsi:schemaLocation=" 
   http://www.springframework.org/schema/beans 
   http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
   http://www.springframework.org/schema/context 
   http://www.springframework.org/schema/context/spring-context-3.0.xsd 
   http://www.springframework.org/schema/aop 
   http://www.springframework.org/schema/aop/spring-aop-3.0.xsd 
   http://www.springframework.org/schema/mvc 
   http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd"> 
 <mvc:annotation-driven /> 
 
<bean 
  class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
  <property name="prefix" value="/WEB-INF/jsp/" /> 
  <property name="suffix" value=".jsp" /> 
</bean> 
 
<context:component-scan base-package="com.icumed.beans" /> 
<context:annotation-config /> 
 
<bean id="requestscope" class="com.icumed.beans.RequestInterfaceImpl" scope="request"> 
  <constructor-arg value="Device1"/> 
   <aop:scoped-proxy proxy-target-class="false" /> 
</bean> 
 
<bean id="sessionscope" class="com.icumed.beans.SessionInterfaceImpl" scope="session"> 
  <constructor-arg value="Device2"/> 
   <aop:scoped-proxy proxy-target-class="false" /> 
</bean> 
</beans> 

TestController.java

package com.icumed.beans; 
 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.stereotype.Controller; 
import org.springframework.ui.Model; 
import org.springframework.web.bind.annotation.RequestMapping; 
 
@Controller 
public class TestController { 
 
    @Autowired(required=true) 
    private RequestInterfaceImpl requestInterfaceImpl; 
 
    @Autowired(required=true) 
    private SessionInterfaceImpl sessionInterfaceImpl; 
 
    @RequestMapping(value = "/") 
    public String fetchDevice(Model model) { 
        model.addAttribute("requestscopedData", requestInterfaceImpl.getDeviceName()); 
        model.addAttribute("sessionscopedData", sessionInterfaceImpl.getDeviceName()); 
 
        /* return to view "hello.jsp" */ 
        return "device"; 
    } 
 
} 

请您参考如下方法:

第一: 你可以改变你的过滤器。有时它需要这些。

<filter> 
<filter-name>requestContextFilter</filter-name> 
<filter-class>org.springframework.web.filter.RequestContextFilter</filterclass> 
</filter> 
<filter-mapping> 
<filter-name>requestContextFilter</filter-name> 
<url-pattern>/*</url-pattern>      //filter path 
</filter-mapping> 

第二: 你知道RequestInterfaceImpl是@Autowired。需要代理； 你设置了 proxy-target-class="false"，所以它将使用 JDK 代理，而不是 CGLib。

你可以这样做:

@Autowired(required=true) 
private RequestInterface requestInterface;   // use its interface, not impl 

或者您可以设置proxy-target-class="true"。我认为这是错误的，因为代理!