SpringMVC常见问题Error configuring application listener of class org.springframework.web.context.ContextLoaderListenejava.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

六月 20, 2018 9:43:34 下午 org.apache.catalina.core.StandardContext listenerStart

严重: Error configuring application listener of class org.springframework.web.context.ContextLoaderListener

java.lang.ClassNotFoundException: org.springframework.web.context.ContextLoaderListener

at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1858)

at org.apache.catalina.loader.WebappClassLoaderBase.loadClass(WebappClassLoaderBase.java:1701)

at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:504)

at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:486)

at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:113)

at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4984)

at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5584)

at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:147)

at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1572)

at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1562)

at java.util.concurrent.FutureTask.run(FutureTask.java:266)

at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)

at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)

at java.lang.Thread.run(Thread.java:745)

使用maven搭建SpringMVC框架时在Tomcat上运行遇到以上问题，java.lang.ClassNotFoundException，个人以为该问题所在应是找不到类，

一、缺少jar包

二、配置文件出错

首先看看maven中是否引入该jar包。

<dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-core</artifactId>
        <version>4.3.1.RELEASE</version>
    </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-web</artifactId>
      <version>4.3.1.RELEASE</version>
        <scope>compile</scope>
      </dependency>
      <dependency>
        <groupId>org.springframework</groupId>
        <artifactId>spring-webmvc</artifactId>
      <version> 4.3.1.RELEASE</version>
       <scope>compile</scope>
     </dependency>

maven的jar包导入情况，检查了一下发现jar没问题

这时在检查配置文件，web.xml  配置如下

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

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

<servlet>
      <servlet-name>springmvc</servlet-name>
      <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
  </servlet>
 
  <servlet-mapping>
      <servlet-name>springmvc</servlet-name>
      <url-pattern>/</url-pattern>
  </servlet-mapping>

也没发现什么问题，再网上查找资料，看了一下别人的方案；

解决如下：

项目 —> 属性 -> Deployment Assembly -> Add -> Java Build Path Entries -> 选择Maven Dependencies -> Finish -> OK

把对应的Maven依赖包也发布到tomcat，调试时会自动把那些jar发布到指定目录下，tomcat也能找到那些jar了

但是我的项目却没有找到Maven Dependedcies选项；

what？？？咋整？

若引入了，则有可能是因为tomcat发布时没有引入该jar包。

解决如下：

把对应的Maven依赖包也发布到tomcat，调试时会自动把那些jar发布到指定目录下，tomcat也能找到那些jar了。

关闭eclipse，重新部署运行Tomcat，问题就解决了！

但是问题又来了

2018-06-20 22:33:11,487 [org.springframework.web.context.ContextLoader]-[ERROR] Context initialization failed

org.springframework.beans.factory.BeanDefinitionStoreException: IOException parsing XML document from ServletContext resource [/WEB-INF/applicationContext.xml]; nested exception is java.io.FileNotFoundException: Could not open ServletContext resource [/WEB-INF/applicationContext.xml]

无法找到XML文件，what？

查看了配置

仔细看了一下，是无法找到/WEB-INF下的配置？

将配置文件复制到WEB-INF下，就可运行成功，为什么呢？maven的配置文件不应都放在resources下吗？

SpringMVC的依赖maven配置

<!--日志包--> <dependency> <groupId>junit</groupId> <artifactId>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-log4j12</artifactId> <version>1.7.21</version> </dependency> <!--j2ee相关包 servlet、jsp、jstl--> <dependency> <groupId>javax.servlet</groupId> <artifactId>javax.servlet-api</artifactId> <version>3.1.0</version> </dependency> <dependency> <groupId>javax.servlet.jsp</groupId> <artifactId>jsp-api</artifactId> <version>2.2</version> </dependency> <dependency> <groupId>javax.servlet</groupId> <artifactId>jstl</artifactId> <version>1.2</version> </dependency> <!--mysql驱动包--> <dependency> <groupId>mysql</groupId> <artifactId>mysql-connector-java</artifactId> <version>5.1.35</version> </dependency> <!--spring相关包--> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-web</artifactId> <version>4.3.1.RELEASE</version> </dependency> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-webmvc</artifactId> <version>4.3.1.RELEASE</version> </dependency> <!--其他需要的包--> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>3.4</version> </dependency> <dependency> <groupId>commons-fileupload</groupId> <artifactId>commons-fileupload</artifactId> <version>1.3.1</version> </dependency> </dependencies>