Projet JSF et EJB

salut
j'ai crée projet ejb et un projet JSF
dans le projet ejb : bean session et l'entité contact
bean session

Code:

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package sessions;
 
import javax.ejb.*;
import entityBeans.Contact;
@Stateless
@LocalBean
public class Gérercontacte extends Gérer  {
 
 
	 public void add(Contact user) {
	        bd.persist(user);
	    }
 
	    public void update(Contact user) {
	        bd.merge(user);
	    }
}

Code:

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package sessions;
 
import javax.persistence.*;
 
public abstract class Gérer {
    @PersistenceContext
    protected EntityManager bd;
}

et l'entité Contact

Code:

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package entityBeans;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
@Entity
public class Contact {
private long id;
private String firstName;
private String lastName;
private String email;
 
@Id@GeneratedValue(strategy=GenerationType.AUTO)
public long getId() {return id;}
public void setId(long l) {id = l;}
public String getEmail() {return email;}
public String getFirstName() {return firstName; }
public String getLastName() {return lastName; }
public void setEmail(String string) {email = string; }
public void setFirstName(String string) {firstName = string; }
public void setLastName(String string) {lastName = string; }
}

puis j'ai crée projet jsf et j'ai ajouté projet ejb dans java Build Path
j'ai créé bean

Code:

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package ejb;
import javax.ejb.EJB;
import javax.faces.bean.*;
 
 import entityBeans.Contact;
 
 import sessions.Gérercontacte;
 
@ManagedBean
@SessionScoped
public class GestionAuteurs {
 
 @EJB
	 private Gérercontacte gestion;
private Contact cont;
public Contact getCont() {
	return cont;
}
public void setCont(Contact cont) {
	this.cont = cont;
}
 
public String addUser() {
    gestion.add(cont);
    return "success?faces-redirect=true";
}
 
}

et la page xhtml

Code:

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!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml"
      xmlns:h="http://java.sun.com/jsf/html"
      xmlns:f="http://java.sun.com/jsf/core"
      xmlns:ui="http://java.sun.com/jsf/facelets">
 
	  <h:head>
      <title>ajouter utilisateur</title>		
      <h:outputStylesheet library="css" name="styles.css"  /> 	
   </h:head>
   <h:body> 
 
   <h:form>
 
      <h3>Ajouter Utilisateur</h3>
      <hr/>
      <table>
      <tr>
            <td>Name :</td>
            <td><h:inputText size="30" value="#{GestionAuteurs.cont.firstName}" /></td>
      </tr>
      <tr>
            <td>Prénom :</td>
            <td><h:inputText size="20" value="#{GestionAuteurs.cont.lastName}" /></td>
      </tr>
 
       <tr>
            <td>Mail :</td>
            <td><h:inputText size="20" value="#{GestionAuteurs.cont.email}" /></td>
      </tr>
 
 
      <tr>
            <td> </td>
            <td><h:commandButton id="update" value="Update" action="#{GestionAuteurs.addUser}"/> 
 
</td>
      </tr>
      </table>	  
   </h:form>
   </h:body>
</html>

mais lorsque je lance la page http://localhost:8080/mus/test/contact.xhtml
message d'erreur

Code:

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4:18:53,901 ERROR [org.jboss.kernel.plugins.dependency.AbstractKernelController] Error installing to Real: name=vfs:///D:/projet/.metadata/.plugins/org.jboss.ide.eclipse.as.core/JBoss_6.x_Runtime_Server1372194210812/deploy/test.ear state=PreReal mode=Manual requiredState=Real: org.jboss.deployers.spi.DeploymentException: Error deploying: jboss.web.deployment:war=/mus
	at org.jboss.deployers.spi.DeploymentException.rethrowAsDeploymentException(DeploymentException.java:49) [:2.2.0.GA]
	at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:125) [:6.0.0.Final]
	at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:49) [:6.0.0.Final]
	at org.jboss.deployers.spi.deployer.helpers.AbstractSimpleRealDeployer.internalDeploy(AbstractSimpleRealDeployer.java:62) [:2.2.0.GA]
	at org.jboss.deployers.spi.deployer.helpers.AbstractRealDeployer.deploy(AbstractRealDeployer.java:55) [:2.2.0.GA]
	at org.jboss.deployers.plugins.deployers.DeployerWrapper.deploy(DeployerWrapper.java:179) [:2.2.0.GA]
	at org.jboss.deployers.plugins.deployers.DeployersImpl.doDeploy(DeployersImpl.java:1832) [:2.2.0.GA]
	at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1550) [:2.2.0.GA]
	at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1571) [:2.2.0.GA]
	at org.jboss.deployers.plugins.deployers.DeployersImpl.doInstallParentFirst(DeployersImpl.java:1603) [:2.2.0.GA]
	at org.jboss.deployers.plugins.deployers.DeployersImpl.install(DeployersImpl.java:1491) [:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:379) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2044) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1083) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1322) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1246) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1139) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:939) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:654) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.deployers.plugins.deployers.DeployersImpl.change(DeployersImpl.java:1983) [:2.2.0.GA]
	at org.jboss.deployers.plugins.deployers.DeployersImpl.process(DeployersImpl.java:1076) [:2.2.0.GA]
	at org.jboss.deployers.plugins.main.MainDeployerImpl.process(MainDeployerImpl.java:679) [:2.2.0.GA]
	at org.jboss.system.server.profileservice.deployers.MainDeployerPlugin.process(MainDeployerPlugin.java:106) [:6.0.0.Final]
	at org.jboss.profileservice.dependency.ProfileControllerContext$DelegateDeployer.process(ProfileControllerContext.java:143) [:0.2.2]
	at org.jboss.profileservice.dependency.ProfileDeployAction.deploy(ProfileDeployAction.java:151) [:0.2.2]
	at org.jboss.profileservice.dependency.ProfileDeployAction.installActionInternal(ProfileDeployAction.java:94) [:0.2.2]
	at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:54) [jboss-kernel.jar:2.2.0.GA]
	at org.jboss.kernel.plugins.dependency.InstallsAwareAction.installAction(InstallsAwareAction.java:42) [jboss-kernel.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.action.SimpleControllerContextAction.simpleInstallAction(SimpleControllerContextAction.java:62) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.action.AccessControllerContextAction.install(AccessControllerContextAction.java:71) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractControllerContextActions.install(AbstractControllerContextActions.java:51) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractControllerContext.install(AbstractControllerContext.java:379) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:2044) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.incrementState(AbstractController.java:1083) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.executeOrIncrementStateDirectly(AbstractController.java:1322) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1246) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.resolveContexts(AbstractController.java:1139) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:939) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.change(AbstractController.java:654) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.profileservice.dependency.ProfileActivationWrapper$BasicProfileActivation.start(ProfileActivationWrapper.java:190) [:0.2.2]
	at org.jboss.profileservice.dependency.ProfileActivationWrapper.start(ProfileActivationWrapper.java:87) [:0.2.2]
	at org.jboss.profileservice.dependency.ProfileActivationService.activateProfile(ProfileActivationService.java:215) [:0.2.2]
	at org.jboss.profileservice.dependency.ProfileActivationService.activate(ProfileActivationService.java:159) [:0.2.2]
	at org.jboss.profileservice.AbstractProfileService.activateProfile(AbstractProfileService.java:154) [:0.2.2]
	at org.jboss.system.tools.ProfileServiceToolsFacade.addURI(ProfileServiceToolsFacade.java:233) [:6.0.0.Final]
	at org.jboss.system.tools.LegacyDeploymentScannerAdapter.addURL(LegacyDeploymentScannerAdapter.java:140) [:6.0.0.Final]
	at org.jboss.system.tools.DeploymentScanner.addURL(DeploymentScanner.java:91) [:6.0.0.Final]
	at org.jboss.system.tools.DeploymentScanner.addURL(DeploymentScanner.java:83) [:6.0.0.Final]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_23]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) [:1.6.0_23]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [:1.6.0_23]
	at java.lang.reflect.Method.invoke(Unknown Source) [:1.6.0_23]
	at org.jboss.mx.interceptor.ReflectedDispatcher.invoke(ReflectedDispatcher.java:157) [:6.0.0.GA]
	at org.jboss.mx.server.Invocation.dispatch(Invocation.java:96) [:6.0.0.GA]
	at org.jboss.mx.server.Invocation.invoke(Invocation.java:88) [:6.0.0.GA]
	at org.jboss.mx.server.AbstractMBeanInvoker.invoke(AbstractMBeanInvoker.java:271) [:6.0.0.GA]
	at org.jboss.mx.server.MBeanServerImpl.invoke(MBeanServerImpl.java:670) [:6.0.0.GA]
	at org.jboss.system.server.jmx.MBeanServerWrapper.invoke(MBeanServerWrapper.java:138) [:6.0.0.Final (Build SVNTag:JBoss_6.0.0.Final date: 20101228)]
	at javax.management.remote.rmi.RMIConnectionImpl.doOperation(Unknown Source) [:1.6.0_23]
	at javax.management.remote.rmi.RMIConnectionImpl.access$200(Unknown Source) [:1.6.0_23]
	at javax.management.remote.rmi.RMIConnectionImpl$PrivilegedOperation.run(Unknown Source) [:1.6.0_23]
	at javax.management.remote.rmi.RMIConnectionImpl.doPrivilegedOperation(Unknown Source) [:1.6.0_23]
	at javax.management.remote.rmi.RMIConnectionImpl.invoke(Unknown Source) [:1.6.0_23]
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) [:1.6.0_23]
	at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source) [:1.6.0_23]
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source) [:1.6.0_23]
	at java.lang.reflect.Method.invoke(Unknown Source) [:1.6.0_23]
	at sun.rmi.server.UnicastServerRef.dispatch(Unknown Source) [:1.6.0_23]
	at sun.rmi.transport.Transport$1.run(Unknown Source) [:1.6.0_23]
	at java.security.AccessController.doPrivileged(Native Method) [:1.6.0_23]
	at sun.rmi.transport.Transport.serviceCall(Unknown Source) [:1.6.0_23]
	at sun.rmi.transport.tcp.TCPTransport.handleMessages(Unknown Source) [:1.6.0_23]
	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(Unknown Source) [:1.6.0_23]
	at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(Unknown Source) [:1.6.0_23]
	at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(Unknown Source) [:1.6.0_23]
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) [:1.6.0_23]
	at java.lang.Thread.run(Unknown Source) [:1.6.0_23]
Caused by: java.lang.IllegalStateException: jboss.web.deployment:war=/mus is already installed.
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:835) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.dependency.plugins.AbstractController.install(AbstractController.java:641) [jboss-dependency.jar:2.2.0.GA]
	at org.jboss.system.ServiceController.doInstall(ServiceController.java:653) [:6.0.0.Final (Build SVNTag:JBoss_6.0.0.Final date: 20101228)]
	at org.jboss.system.ServiceController.install(ServiceController.java:256) [:6.0.0.Final (Build SVNTag:JBoss_6.0.0.Final date: 20101228)]
	at org.jboss.system.deployers.ServiceDeployer.deploy(ServiceDeployer.java:93) [:6.0.0.Final]
	... 75 more

merci d'avance