[MVC] Erreur 500 Servlet.init()

Bonjour,

je suis sur un projet SPring mvc et j'ai un souci a l'affichage d'une jsp.. je suis sur l'IDE itelliJ15

voici mon erreur:

Code:

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Etat HTTP 500 - "Servlet.init()" pour la servlet HelloWorld a généré une exception
 
type Rapport d''exception
 
message "Servlet.init()" pour la servlet HelloWorld a généré une exception
 
description Le serveur a rencontré une erreur interne qui l''a empêché de satisfaire la requête.
 
exception
 
javax.servlet.ServletException: "Servlet.init()" pour la servlet HelloWorld a généré une exception
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1502)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Thread.java:745)
cause mère
 
java.lang.NoClassDefFoundError: Could not initialize class org.springframework.core.convert.support.DefaultConversionService
	org.springframework.core.env.AbstractPropertyResolver.<init>(AbstractPropertyResolver.java:41)
	org.springframework.core.env.PropertySourcesPropertyResolver.<init>(PropertySourcesPropertyResolver.java:41)
	org.springframework.core.env.AbstractEnvironment.<init>(AbstractEnvironment.java:112)
	org.springframework.core.env.StandardEnvironment.<init>(StandardEnvironment.java:54)
	org.springframework.web.context.support.StandardServletEnvironment.<init>(StandardServletEnvironment.java:44)
	org.springframework.web.servlet.HttpServletBean.createEnvironment(HttpServletBean.java:215)
	org.springframework.web.servlet.HttpServletBean.getEnvironment(HttpServletBean.java:205)
	org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:126)
	javax.servlet.GenericServlet.init(GenericServlet.java:158)
	org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:502)
	org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:79)
	org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:616)
	org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:522)
	org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1095)
	org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:672)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1502)
	org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1458)
	java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	java.lang.Thread.run(Thread.java:745)

il ne compile pas quand j'ai le listener dans mon fichier web.xml:

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

j'ai cette erreur:

Code:

Artifact siteweb:war exploded: Error during artifact deployment. See server log for details.

voici mon web xml :

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<web-app id="WebApp_ID" version="2.4"
         xmlns="http://java.sun.com/xml/ns/j2ee"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee
   http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
 
    <display-name>Spring MVC Application</display-name>
    <servlet>
        <servlet-name>HelloWorld</servlet-name>
 
        <servlet-class>
            org.springframework.web.servlet.DispatcherServlet
        </servlet-class>
        <init-param>
            <param-name>contextConfigLocation</param-name>
            <param-value>/WEB-INF/dispatcher-servlet.xml</param-value>
        </init-param>
 
        <load-on-startup>1</load-on-startup>
    </servlet>
    <servlet-mapping>
        <servlet-name>HelloWorld</servlet-name>
        <url-pattern>/</url-pattern>
    </servlet-mapping>
</web-app>

merci pour vos réactions.