Erreur Tomcat

Bonjour,
j'ai obtenu ce message en exécutant mon projet JavaEE

avr. 23, 2014 4:07:49 PM org.apache.catalina.core.AprLifecycleListener init
Infos: Loaded APR based Apache Tomcat Native library 1.1.30 using APR version 1.4.8.
avr. 23, 2014 4:07:49 PM org.apache.catalina.core.AprLifecycleListener init
Infos: APR capabilities: IPv6 [true], sendfile [true], accept filters [false], random [true].
avr. 23, 2014 4:07:49 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
Avertissement: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:HomeShopProject' did not find a matching property.
avr. 23, 2014 4:07:49 PM org.apache.tomcat.util.digester.SetPropertiesRule begin
Avertissement: [SetPropertiesRule]{Server/Service/Engine/Host/Context} Setting property 'source' to 'org.eclipse.jst.jee.server:AA' did not find a matching property.
avr. 23, 2014 4:07:51 PM org.apache.catalina.core.AprLifecycleListener initializeSSL
Infos: OpenSSL successfully initialized (OpenSSL 1.0.1g 7 Apr 2014)
avr. 23, 2014 4:07:51 PM org.apache.coyote.AbstractProtocol init
Infos: Initializing ProtocolHandler ["http-apr-8080"]
avr. 23, 2014 4:07:51 PM org.apache.coyote.AbstractProtocol init
Infos: Initializing ProtocolHandler ["ajp-apr-8009"]
avr. 23, 2014 4:07:51 PM org.apache.catalina.startup.Catalina load
Infos: Initialization processed in 2918 ms
avr. 23, 2014 4:07:51 PM org.apache.catalina.core.StandardService startInternal
Infos: Démarrage du service Catalina
avr. 23, 2014 4:07:51 PM org.apache.catalina.core.StandardEngine startInternal
Infos: Starting Servlet Engine: Apache Tomcat/7.0.53
avr. 23, 2014 4:07:54 PM org.apache.catalina.util.SessionIdGenerator createSecureRandom
Infos: Creation of SecureRandom instance for session ID generation using [SHA1PRNG] took [154] milliseconds.
avr. 23, 2014 4:07:56 PM org.apache.catalina.core.StandardContext listenerStart
Grave: Exception lors de l'envoi de l'évènement contexte initialisé (context initialized) à l'instance de classe d'écoute (listener) com.homeshop.config.DaoFactoryInitialization
com.homeshop.dao.DAOConfigurationException: driver is not found in the classpath.
at com.homeshop.dao.DAOFactory.getInstance(DAOFactory.java:58)
at com.homeshop.config.DaoFactoryInitialization.contextInitialized(DaoFactoryInitialization.java:27)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4973)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5467)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask.run(FutureTask.java:262)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.ClassNotFoundException: com.mysql.jdbc.Driver
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1720)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1571)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:190)
at com.homeshop.dao.DAOFactory.getInstance(DAOFactory.java:56)
... 10 more

avr. 23, 2014 4:07:56 PM org.apache.catalina.core.StandardContext startInternal
Grave: Error listenerStart
avr. 23, 2014 4:07:56 PM org.apache.catalina.core.StandardContext startInternal
Grave: Erreur de démarrage du contexte /HomeShopProject suite aux erreurs précédentes
avr. 23, 2014 4:07:56 PM org.apache.coyote.AbstractProtocol start
Infos: Starting ProtocolHandler ["http-apr-8080"]
avr. 23, 2014 4:07:57 PM org.apache.coyote.AbstractProtocol start
Infos: Starting ProtocolHandler ["ajp-apr-8009"]
avr. 23, 2014 4:07:57 PM org.apache.catalina.startup.Catalina start
Infos: Server startup in 5455 ms

aidez moi svp