找不到在ServletContext

Question

我正在编写Spring MVC并遇到以下错误：

  

18：34：44,999警告   [org.springframework.web.context.support.XmlWebApplicationContext]   （MSC服务线程1-1）上下文期间遇到异常   初始化-取消刷新尝试：   org.springframework.beans.factory.BeanCreationException：错误   用名字创建bean   'org.springframework.web.servlet.mvc.annotation.DefaultAnnotationHandlerMapping＃0'：   Bean初始化失败；嵌套异常为   org.springframework.beans.factory.CannotLoadBeanClassException：无法   查找名称为bean的类[com.icumed.beans.RequestInterfaceImpl]   ServletContext资源中定义的“ scopedTarget.requestscope”   [/WEB-INF/FetchDevice-servlet.xml]；嵌套异常为   java.lang.ClassNotFoundException：   来自[Module的com.icumed.beans.RequestInterfaceImpl   服务模块中的“ deployment.6.BeanScopingRequestSession.war：main”   加载程序]相关原因：   org.springframework.beans.factory.CannotLoadBeanClassException：无法   查找名称为bean的类[com.icumed.beans.RequestInterfaceImpl]   ServletContext资源中定义的“ scopedTarget.requestscope”   [/WEB-INF/FetchDevice-servlet.xml]；嵌套异常为   java.lang.ClassNotFoundException：   来自[Module的com.icumed.beans.RequestInterfaceImpl   服务模块中的“ deployment.6.BeanScopingRequestSession.war：main”   加载程序]相关原因：   org.springframework.beans.factory.CannotLoadBeanClassException：无法   查找名称为bean的类[com.icumed.beans.SessionInterfaceImpl]   ServletContext资源中定义的“ scopedTarget.sessionscope”   [/WEB-INF/FetchDevice-servlet.xml]；嵌套异常为   java.lang.ClassNotFoundException：   来自[Module的com.icumed.beans.SessionInterfaceImpl   服务模块中的“ deployment.6.BeanScopingRequestSession.war：main”   加载程序]

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";
    }

}

Answer 1

第一：  您可以更改过滤器。有时它需要那些。

<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：   您知道RequestInterfaceImpl是@Autowired。它需要代理； 您设置了proxy-target-class="false"，因此它将使用JDK代理而不是CGLib。

您可以执行以下操作：

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

或者您可以设置proxy-target-class="true"。我认为是因为代理错误！