springmvc 请求无法到达controller,出现404错误的原因

在maven集合工程整合SSM框架的时候出现一个小毛病，问题如下：
项目启动成功然后我怎么发送HTTP请求都无法进入controller，最后导致报404错误。经过一系列的排查总算解决了。具体排查方法和顺序如下：

• 从web.xml文件看起

<?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" 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>crowdfunding</display-name>
  <context-param>
    <param-name>contextConfigLocation</param-name>
    <param-value>classpath*:spring/spring-*.xml</param-value>
  </context-param>

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

  <!-- 字符编码过滤器 -->
  <filter>
    <filter-name>encoding</filter-name>
    <filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
    <init-param>
      <param-name>encoding</param-name>
      <param-value>UTF-8</param-value>
    </init-param>
    <init-param>
      <param-name>forceEncoding</param-name>
      <param-value>true</param-value>
    </init-param>
  </filter>
  <filter-mapping>
    <filter-name>encoding</filter-name>
    <url-pattern>/*</url-pattern>
  </filter-mapping>


  <filter>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <filter-class>org.springframework.web.filter.HiddenHttpMethodFilter</filter-class>
  </filter>
  <filter-mapping>
    <filter-name>HiddenHttpMethodFilter</filter-name>
    <servlet-name>springmvc</servlet-name>
  </filter-mapping>



  <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:spring/springmvc-context.xml</param-value>
    </init-param>
    <load-on-startup>1</load-on-startup>
  </servlet>
  <servlet-mapping>
    <servlet-name>springmvc</servlet-name>
   <!-- <url-pattern>*.htm</url-pattern>
    <url-pattern>*.do</url-pattern>-->
    <url-pattern>/</url-pattern>
  </servlet-mapping>

  <!-- 会话超时时间 -->
  <session-config>
    <session-timeout>60</session-timeout>
  </session-config>

  <welcome-file-list>
    <welcome-file>index.jsp</welcome-file>
  </welcome-file-list>
</web-app>

情况1

<param-value>classpath:spring/spring-context.xml</param-value>
监听器的参数应该是先加载spring容器配置如果先加载springmvc配置的会导致context实现。
<param-value>classpath:spring/springmvc-context.xml</param-value>
DispatchServlet前端控制加载的是springmvc配置才是正确，如果一开始加载spring容器配置一样会出现上面问题导致HTTP请求进入不到控制器最后导致404错误。

情况2

这种情况比较简单，一注解驱动是否配置<mvc:annotation-driven/> 二请看视图解析是否配错，必须是在WEB-INF下面目录，三就是是否开启注解扫描<context:component-scan base-package=“cn.crowdfunding.manager.xxx”/>

• 以上是作者分析的几点，如有提议请评论留言。谢谢观看。