one hello.jsp
web.xml is
<?xml version="1.0" encoding="UTF-8"?>
http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd” version=”3.0″>
<welcome-file-list>
<welcome-file>index.jsp</welcome-file>
</welcome-file-list>
<!-- The front controller of this Spring Web application, responsible for
handling all application requests -->
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<!-- Map all requests to the DispatcherServlet for handling -->
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.html</url-pattern>
</servlet-mapping>
dispatcher-servlet.xml is
<?xml version="1.0" encoding="UTF-8"?>
http://www.springframework.org/schema/beans/spring-beans-2.5.xsd”
xmlns:p="http://www.springframework.org/schema/p">
<bean id="viewResolver"
class="org.springframework.web.servlet.view.InternalResourceViewResolver">
<property name="prefix">
<value>/WEB-INF/jsp/</value>
</property>
<property name="suffix">
<value>.jsp</value>
</property>
</bean>
<bean name="/hello.html" class="com.spring.HelloWorldController"></bean>
</beans>
JAR Files are: spring.jar spring-webmvc.jar spring-aop spring-beans spring-context spring-context-support spring-core spring-jdbc spring-orm spring-source spring-test spring-tx
Answer
The ClassNotFoundException clearly indicates that you are missing org.springframework.web.servlet classes.
If you are not using Maven, make sure you include all the appropriate Spring JARs.
If you are using Maven, make sure you include the spring-web dependency:
<dependency>
<groupId>org.springframework</groupId>
<artifactId>spring-web</artifactId>
<version><!-- Your spring version here --></version>
</dependency>
If none of these work, take a look at this thread.