java - spring mvc 只要使用context:component-scan标签就报500错误

Question

使用的是jre1.8 spring4.0 让我百思不得其解的是只要springmvc.xml中出现了
<context:component-scan base-package="com.ssm.controller"></context:component-scan> 这个标签 就肯定会报下面的这个500错误，只要不写这个标签就能成功部署，我后来用标注的方式来标记handler还是不行 一切都是因为这个标签的问题 已经好几天了无法解决 求高人看下这个到底是哪里的错误 我实在搞不懂，多谢了！

springmvc.xml 配置文件

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
       xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
       xmlns:mvc="http://www.springframework.org/schema/mvc"
       xmlns:p="http://www.springframework.org/schema/p"
       xmlns:context="http://www.springframework.org/schema/context"
       xmlns:aop="http://www.springframework.org/schema/aop"
       xmlns:tx="http://www.springframework.org/schema/tx"
       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/tx 
            http://www.springframework.org/schema/tx/spring-tx-3.0.xsd
            http://www.springframework.org/schema/mvc 
            http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd
            http://www.springframework.org/schema/context 
            http://www.springframework.org/schema/context/spring-context-3.0.xsd">
    
   
 <context:component-scan base-package="com.ssm.controller"></context:component-scan>
   
  
  
  <!-- 处理器适配器 将bean的name作为url进行查找 ，需要在配置Handler时指定beanname（就是url） 
    所有的映射器都实现 HandlerMapping接口。 -->
  <bean   class="org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter" />
    
    
    
      <!-- 配置Handler  将编写的Handller在映射器加载 ,name一定要写成url -->
    <bean  id="itemsController" name="/queryItems.action" class="com.ssm.controller.ItemsController1" />
      
      
    <!-- 处理器映射器 将bean的name作为url进行查找 ，需要在配置Handler时指定beanname（就是url） 
    所有的映射器都实现 HandlerMapping接口。
    -->
    <bean class="org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping" />
  
  
    <!-- 视图解析器
    解析jsp解析，默认使用jstl标签，classpath下的得有jstl的包
     -->
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver">
      
    </bean>
</beans>

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>springmvc</display-name>
    
  <!-- springmvc前端控制器 -->
  <servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
        
      <init-param>
          <param-name>contextConfigLocation</param-name>
          <param-value>classpath:springmvc.xml</param-value>
      </init-param>
  </servlet>
    
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
    
      <url-pattern>*.action</url-pattern>
  </servlet-mapping>
    
    
  <welcome-file-list>
    <welcome-file>index.html</welcome-file>
    <welcome-file>index.htm</welcome-file>
    <welcome-file>index.jsp</welcome-file>
    <welcome-file>default.html</welcome-file>
    <welcome-file>default.htm</welcome-file>
    <welcome-file>default.jsp</welcome-file>
  </welcome-file-list>
</web-app>

---

**ItemsController1**

    package com.ssm.controller;
  
import java.util.ArrayList;
import java.util.List;
  
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
  
import org.springframework.web.servlet.ModelAndView;
import org.springframework.web.servlet.mvc.Controller;
  
import com.ssm.pojo.Items;
  
public class ItemsController1 implements Controller{
  
      
    public ModelAndView handleRequest(HttpServletRequest request,
            HttpServletResponse response) throws Exception {
          
        //调用service查找 数据库，查询商品列表，这里使用静态数据模拟
                List<Items> itemsList = new ArrayList<Items>();
                //向list中填充静态数据
                  
                Items items_1 = new Items();
                items_1.setName("联想笔记本");
                items_1.setPrice(6000f);
                items_1.setDetail("ThinkPad T430 联想笔记本电脑！");
                  
                Items items_2 = new Items();
                items_2.setName("苹果手机");
                items_2.setPrice(5000f);
                items_2.setDetail("iphone6苹果手机！");
                  
                itemsList.add(items_1);
                itemsList.add(items_2);
  
                //返回ModelAndView
                ModelAndView modelAndView =  new ModelAndView();
                //相当 于request的setAttribut，在jsp页面中通过itemsList取数据
                modelAndView.addObject("itemsList", itemsList);
                  
                //指定视图
                modelAndView.setViewName("/WEB-INF/jsp/items/itemsList.jsp");
  
                return modelAndView;
  
    }
  
}

Answer 1

com.ssm.controller.*Try it

Answer 2

<listener>
    <listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
  </listener>

web.xml is missing the above sentence and integrates the Spring container into the web application

Answer 3

The correct answer upstairs is because you did not load the spring container when the web server started. I'm just trying to mix things up~~~~

Answer 4

Owner, my problem is exactly the same as yours. I have been working on it for a long time but I still can’t find the reason. How did you solve it?