java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet

Question

i am using spring 3.1.0.RELEASE, and my servlet container is tomcat 7 and my IDE is eclipse indigo and the jar spring-webmvc-3.1.0.RELEASE.jar which contains the DispatcherServlet exists in the lib folder, and yet when running the application, i am getting the exception:

java.lang.ClassNotFoundException: org.springframework.web.servlet.DispatcherServlet     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1678)     at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1523)     at org.apache.catalina.core.DefaultInstanceManager.loadClass(DefaultInstanceManager.java:525)     at org.apache.catalina.core.DefaultInstanceManager.loadClassMaybePrivileged(DefaultInstanceManager.java:507)     at org.apache.catalina.core.DefaultInstanceManager.newInstance(DefaultInstanceManager.java:126)     at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1099)     at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:1043)     at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java:4957)     at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5284)     at org.apache.catalina.core.StandardContext$3.call(StandardContext.java:5279)     at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)     at java.util.concurrent.FutureTask.run(FutureTask.java:138)     at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)     at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)     at java.lang.Thread.run(Thread.java:662) 

please advise why i am getting this exception, and how to fix it.

EDIT: following are my configuration files:

1- .springBeans:

<?xml version="1.0" encoding="UTF-8"?> <beansProjectDescription>     <version>1</version>     <pluginVersion><![CDATA[2.9.0.201203011806-RELEASE]]></pluginVersion>     <configSuffixes>         <configSuffix><![CDATA[xml]]></configSuffix>     </configSuffixes>     <enableImports><![CDATA[false]]></enableImports>     <configs>         <config>src/main/webapp/WEB-INF/checkout-servlet.xml</config>     </configs>     <configSets>     </configSets> </beansProjectDescription> 

2- web.xml:

<web-app>   <display-name>Checkout</display-name>    <servlet>     <servlet-name>checkout</servlet-name>     <servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>     <load-on-startup>1</load-on-startup>   </servlet>    <servlet-mapping>     <servlet-name>checkout</servlet-name>     <url-pattern>*.action</url-pattern>   </servlet-mapping>  </web-app> 

3- checkout-servlet.xml:

<?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:context="http://www.springframework.org/schema/context"     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd         http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd">      <context:component-scan base-package="com.myapp"/>      <bean id="myService" class="com.myapp.MyService"/>  </beans> 

also when trying to access any page in the application, i get the exception:

HTTP Status 404 - Servlet checkout is not available  type Status report  message Servlet checkout is not available  description The requested resource (Servlet checkout is not available) is not available. Apache Tomcat/7.0.22 

Answer 1

You need to add the "Maven Dependency" in the Deployment Assembly

• right click on your project and choose properties.
• click on Deployment Assembly.
• click add
• click on "Java Build Path Entries"
• select Maven Dependencies"
• click Finish.

Rebuild and deploy again

Note: This is also applicable for non maven project.

Answer 2

Two possible answers:

1- You did not include spring-beans and spring-context jars in your lib. If you are using maven (which will help a lot) those two lines will be enough

<dependency>  <groupId>org.springframework</groupId>   <artifactId>spring-context</artifactId>    <version>3.1.0.RELEASE</version> </dependency> <dependency>  <groupId>org.springframework</groupId>   <artifactId>spring-webmvc</artifactId>    <version>3.1.0.RELEASE</version> </dependency> 

2- The necessary jars are in your classpath but are not deployed on tomcat.