找不到在ServletContext中定义的名称为XXX的bean的类XXX

Question

我正在写一个Spring MVC，并坚持以下错误：

18:34:44999警告[org.springframework.web.context.support.XmlWebApplicationContext]（MSC服务线程1-1）在上下文初始化过程中遇到异常-取消刷新尝试：org。springframework。豆。工厂BeanCreationException:创建名为“org”的bean时出错。springframework。网状物servlet。mvc。注释。DefaultAnnotationHandlerMapping#0”：bean初始化失败；嵌套的异常是org。springframework。豆。工厂CannotLoadBeanClasseException:找不到名为“scopedTarget”的bean的类[com.icumed.beans.RequestInterfaceImpl]。ServletContext资源[/WEB-INF/FetchDevice servlet.xml]中定义的requestscope'；嵌套的异常是java。lang.ClassNotFoundException:com。我记得。豆。来自[Module“deployment.6.BeanScopingRequestSession.war:main”的RequestInterfaceImpl来自服务模块加载器]相关原因：org。springframework。豆。工厂CannotLoadBeanClasseException:找不到名为“scopedTarget”的bean的类[com.icumed.beans.RequestInterfaceImpl]。ServletContext资源[/WEB-INF/FetchDevice servlet.xml]中定义的requestscope'；嵌套的异常是java。lang.ClassNotFoundException:com。我记得。豆。来自[Module“deployment.6.BeanScopingRequestSession.war:main”的RequestInterfaceImpl来自服务模块加载器]相关原因：org。springframework。豆。工厂CannotLoadBeanClasseException:找不到名为“scopedTarget”的bean的类[com.icumed.beans.SessionInterfaceImpl]。ServletContext资源[/WEB-INF/FetchDevice servlet.xml]中定义的sessionscope'；嵌套的异常是java。lang.ClassNotFoundException:com。我记得。豆。SessionInterfaceImpl来自[Module“deployment.6.BeanScopingRequestSession.war:main”来自[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>

获取设备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>

测试控制器。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：你可以更换你的滤镜。有时候它需要那些。

<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：你知道，RequestInterfaceImpl是@Autowired。它需要代理；您设置了代理目标class=“false”，因此它将使用JDK代理，而不是CGLib。

你可以这样做：

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

或者您可以设置代理目标class=“true”。我认为这是错误的，因为代理！