Discussion :

[PhilippeGibault]

Bonjour, j'ai ajouté Spring et Hibernate par Maven.
Les librairies sont bien téléchargés.
Pour le POM, j'ai ça:

Code :

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<?xml version="1.0" encoding="UTF-8"?>
<project
  xmlns="http://maven.apache.org/POM/4.0.0"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
 
  <!-- POM file generated with GWT webAppCreator -->
  <modelVersion>4.0.0</modelVersion>
  <groupId>projet</groupId>
  <artifactId>projet</artifactId>
  <packaging>war</packaging>
  <version>0.1</version>
  <name>GWT Maven Archetype</name>
 
  <properties>
    <!-- Convenience property to set the GWT version -->
    <gwtVersion>2.4.0</gwtVersion>
    <!-- GWT needs at least java 1.5 -->
    <webappDirectory>${project.build.directory}/${project.build.finalName}</webappDirectory>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
 
    <!-- Les versions pour les libs projets -->
    <!-- JUnit -->
	<org.junit.bom.version>4.8.1</org.junit.bom.version>
 
	<!-- Hibernate version -->
	<org.hibernate.bom.version>3.5.6-Final</org.hibernate.bom.version>
	<!-- Hibernate annotations -->
	<org.hibernate.bom.version.annotations>3.2.0.Final</org.hibernate.bom.version.annotations>
 
	<!-- Commmon dbcp -->
	<org.commons.dbcp.bon.version>20030825.184428</org.commons.dbcp.bon.version>
 
	<!-- Common pools -->
	<org.commons.dbcp.pools.version>20030825.183949</org.commons.dbcp.pools.version>
 
	<!-- Driver JDBC MYSQL -->
	<org.jdbc.driver.mysql.bom.version>5.1.18</org.jdbc.driver.mysql.bom.version>
 
	<!-- spring general -->
	<org.spring.bom.version>3.1.0.RELEASE</org.spring.bom.version>
	<!-- Spring ORM -->
	<org.spring.orm.bom.version>3.0.7.RELEASE</org.spring.orm.bom.version>
 
	<!-- Validation -->
	<org.validation.bom.version>1.0.0.GA</org.validation.bom.version>
	<!-- Lib server (JSF...) compile for Tomcat, provided for JBoss -->
	<com.lib.scope>compile</com.lib.scope>	
  </properties>
 
 
  <repositories>
		<!-- JBoss-->
		<repository>
			<id>jboss richfaces</id>
			<name>jboss repository</name>
			<url>http://repository.jboss.org/nexus/content/groups/public-jboss/</url>
		</repository>
	</repositories>
 
  <dependencies>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-servlet</artifactId>
      <version>${gwtVersion}</version>
      <scope>runtime</scope>
    </dependency>
    <dependency>
      <groupId>com.google.gwt</groupId>
      <artifactId>gwt-user</artifactId>
      <version>${gwtVersion}</version>
      <scope>provided</scope>
    </dependency>
 
    <!-- Librairies du projet -->
    <!-- Junit -->
	<dependency>
		<groupId>junit</groupId>
		<artifactId>junit</artifactId>
		<version>${org.junit.bom.version}</version>
		<scope>test</scope>
	</dependency>
 
	<!-- Hibernate -->
	<dependency> <groupId>org.hibernate</groupId> 
	<artifactId>hibernate-core</artifactId> 
		<version>${org.hibernate.bom.version}</version> 
		<scope>${com.lib.scope}</scope> 
		<exclusions>
			<exclusion>
				<groupId>org.slf4j</groupId>
				<artifactId>slf4j-api</artifactId>
			</exclusion>
		</exclusions>		
	</dependency>
 
	<dependency> 
		<groupId>org.hibernate</groupId> 
		<artifactId>hibernate-entitymanager</artifactId> 
		<version>${org.hibernate.bom.version}</version> 
		<scope>${com.lib.scope}</scope> 
		<exclusions>
			<exclusion>
				<groupId>org.slf4j</groupId>
				<artifactId>slf4j-api</artifactId>
			</exclusion>
		</exclusions>
	</dependency>  
 
	<!-- SLF4J Log -->
	<dependency>
		<groupId>org.slf4j</groupId>
		<artifactId>slf4j-log4j12</artifactId>
		<version>1.6.4</version>
		<scope>${com.lib.scope}</scope> 
	</dependency>
 
	<!-- Common dbcp -->
	<dependency>
		<groupId>commons-dbcp</groupId>
		<artifactId>commons-dbcp</artifactId>
		<version>${org.commons.dbcp.bon.version}</version>
		<scope>compile</scope>
	</dependency>
 
	<!-- MySQL driver -->
	<dependency>
		<groupId>mysql</groupId>
		<artifactId>mysql-connector-java</artifactId>
		<version>${org.jdbc.driver.mysql.bom.version}</version>
		<scope>compile</scope>
	</dependency>
 
	<!-- Commons pools -->
	<dependency>
		<groupId>commons-pool</groupId>
		<artifactId>commons-pool</artifactId>
		<version>${org.commons.dbcp.pools.version}</version>
		<scope>compile</scope>
	</dependency>
 
	 <!-- Java injection (JSR-330) -->
	<dependency>
		<groupId>javax.inject</groupId>
		<artifactId>javax.inject</artifactId>
		<version>1</version>
		<scope>${com.lib.scope}</scope>
	</dependency>
 
	<!-- Spring core -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-core</artifactId>
			<version>${org.spring.bom.version}</version>
			<scope>compile</scope>
			<optional>false</optional>
		</dependency>
		<!-- Spring context -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-context</artifactId>
			<version>${org.spring.bom.version}</version>
			<scope>compile</scope>
			<optional>false</optional>
		</dependency>
 
		<!-- Spring JDBC -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-jdbc</artifactId>
			<version>${org.spring.bom.version}</version>
			<scope>compile</scope>
			<optional>false</optional>
		</dependency>
 
 
		<!-- Spring ORM -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-orm</artifactId> 
			<version>${org.spring.orm.bom.version}</version>
			<scope>compile</scope>
			<optional>false</optional>
		</dependency>
 
		<!-- spring web -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-web</artifactId>
			<version>${org.spring.bom.version}</version>
			<scope>compile</scope>
			<optional>false</optional>
		</dependency>
 
		<!-- spring test -->
		<dependency>
			<groupId>org.springframework</groupId>
			<artifactId>spring-test</artifactId>
			<version>${org.spring.bom.version}</version>
			<scope>test</scope>
		</dependency>
 
  </dependencies>
 
  <build>
    <!-- Generate compiled stuff in the folder used for developing mode -->
    <outputDirectory>${webappDirectory}/WEB-INF/classes</outputDirectory>
 
    <plugins>
 
      <!-- GWT Maven Plugin -->
      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>gwt-maven-plugin</artifactId>
        <version>2.4.0</version>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>test</goal><!-- 
              <goal>i18n</goal>
              <goal>generateAsync</goal>-->
            </goals>
          </execution>
        </executions>
        <!-- Plugin configuration. There are many available options, see 
          gwt-maven-plugin documentation at codehaus.org -->
        <configuration>
          <runTarget>projet.html</runTarget>
          <hostedWebapp>${webappDirectory}</hostedWebapp>
          <i18nMessagesBundle>com.projet.client.Messages</i18nMessagesBundle>
        </configuration>
      </plugin>
 
      <!-- Copy static web files before executing gwt:run -->
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-war-plugin</artifactId>
        <version>2.1.1</version>
        <executions>
          <execution>
            <phase>compile</phase>
            <goals><!-- 
              <goal>exploded</goal>-->
            </goals>
          </execution>
        </executions>
        <configuration>
          <webappDirectory>${webappDirectory}</webappDirectory>
        </configuration>
      </plugin>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-compiler-plugin</artifactId>
        <version>2.3.2</version>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>
    </plugins>
  </build>
 
</project>

Or, quand je lance avec Jetty, j'ai ça:

Code :

Sélectionner tout - Visualiser dans une fenêtre à part

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Loading modules
   com.projet.projet
      Validating <servlet> tags for module 'projet'
      For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/servletMappings.html
         [WARN] Module declares a servlet class 'com.google.gwt.junit.server.JUnitHostImpl', but the web.xml has no corresponding declaration; please add the following lines to your web.xml:
<servlet>
  <servlet-name>jUnitHostImpl</servlet-name>
  <servlet-class>com.google.gwt.junit.server.JUnitHostImpl</servlet-class>
</servlet>
<servlet-mapping>
  <servlet-name>jUnitHostImpl</servlet-name>
  <url-pattern>/projet/junithost/*</url-pattern>
</servlet-mapping>
[WARN] Server class 'org.springframework.web.context.ContextLoaderListener' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-web/3.1.0.RELEASE/spring-web-3.1.0.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.springframework.core.io.Resource' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-core/3.1.0.RELEASE/spring-core-3.1.0.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.springframework.context.ApplicationContextException' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-context/3.1.0.RELEASE/spring-context-3.1.0.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.springframework.beans.FatalBeanException' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-beans/3.1.0.RELEASE/spring-beans-3.1.0.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
log4j:WARN No appenders could be found for logger (org.springframework.web.context.ContextLoader).
log4j:WARN Please initialize the log4j system properly.
log4j:WARN See http://logging.apache.org/log4j/1.2/faq.html#noconfig for more info.
[WARN] Server class 'javax.inject.Provider' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/javax/inject/javax.inject/1/javax.inject-1.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.springframework.asm.ClassVisitor' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-asm/3.1.0.RELEASE/spring-asm-3.1.0.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'javax.persistence.EntityManagerFactory' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/hibernate/javax/persistence/hibernate-jpa-2.0-api/1.0.0.Final/hibernate-jpa-2.0-api-1.0.0.Final.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.springframework.orm.jpa.support.PersistenceAnnotationBeanPostProcessor' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-orm/3.0.7.RELEASE/spring-orm-3.0.7.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.springframework.expression.PropertyAccessor' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-expression/3.1.0.RELEASE/spring-expression-3.1.0.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.springframework.dao.support.PersistenceExceptionTranslator' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-tx/3.1.0.RELEASE/spring-tx-3.1.0.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.springframework.jdbc.core.JdbcTemplate' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/springframework/spring-jdbc/3.1.0.RELEASE/spring-jdbc-3.1.0.RELEASE.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.apache.commons.dbcp.BasicDataSource' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/commons-dbcp/commons-dbcp/20030825.184428/commons-dbcp-20030825.184428.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'net.sf.cglib.proxy.Enhancer' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/cglib/cglib/2.2/cglib-2.2.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.hibernate.MappingException' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/hibernate/hibernate-core/3.5.6-Final/hibernate-core-3.5.6-Final.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.hibernate.annotations.Entity' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/hibernate/hibernate-annotations/3.5.6-Final/hibernate-annotations-3.5.6-Final.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'javax.transaction.TransactionManager' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/javax/transaction/jta/1.1/jta-1.1.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.apache.commons.pool.impl.GenericObjectPool' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/commons-pool/commons-pool/20030825.183949/commons-pool-20030825.183949.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'com.projet.server.persistance.entity.impl.CCMGlobalis' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/dev_nico/GWT/projet/target/projet-0.1/WEB-INF/classes/' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.dom4j.DocumentException' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/dom4j/dom4j/1.6.1/dom4j-1.6.1.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
[WARN] Server class 'org.hibernate.annotations.common.reflection.ReflectionManager' could not be found in the web app, but was found on the system classpath
   [WARN] Adding classpath entry 'file:/C:/Eclipe_maven_gwt/eclipse/org/hibernate/hibernate-commons-annotations/3.2.0.Final/hibernate-commons-annotations-3.2.0.Final.jar' to the web app classpath for this session
   For additional info see: file:/C:/Eclipe_maven_gwt/eclipse/plugins/com.google.gwt.eclipse.sdkbundle_2.4.0.v201201120043-rel-r37/gwt-2.4.0/doc/helpInfo/webAppClassPath.html
Starting Jetty on port 8888
   [WARN] Failed startup of context com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload@8c7bd5{/,C:\dev_nico\GWT\projet\src\main\webapp}
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/applicationContext-hibernate-jdbc.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1455)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
	at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:543)
	at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)
	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
	at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
	at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
	at org.mortbay.jetty.Server.doStart(Server.java:222)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
	at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
	at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
	at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
	at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
	at com.google.gwt.dev.DevMode.main(DevMode.java:311)
Caused by: java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory
	at org.hibernate.cfg.Configuration.<clinit>(Configuration.java:165)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:104)
	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newConfiguration(LocalSessionFactoryBean.java:818)
	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:549)
	at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
	... 30 more
Caused by: java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload$WebAppClassLoaderExtension.findClass(JettyLauncher.java:372)
	at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366)
	at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)
	... 42 more
   [WARN] Nested in org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/applicationContext-hibernate-jdbc.xml]: Invocation of init method failed; nested exception is java.lang.NoClassDefFoundError: org/slf4j/LoggerFactory:
java.lang.ClassNotFoundException: org.slf4j.LoggerFactory
	at java.net.URLClassLoader$1.run(URLClassLoader.java:202)
	at java.security.AccessController.doPrivileged(Native Method)
	at java.net.URLClassLoader.findClass(URLClassLoader.java:190)
	at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload$WebAppClassLoaderExtension.findClass(JettyLauncher.java:372)
	at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:366)
	at org.mortbay.jetty.webapp.WebAppClassLoader.loadClass(WebAppClassLoader.java:337)
	at org.hibernate.cfg.Configuration.<clinit>(Configuration.java:165)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:147)
	at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:104)
	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.newConfiguration(LocalSessionFactoryBean.java:818)
	at org.springframework.orm.hibernate3.LocalSessionFactoryBean.buildSessionFactory(LocalSessionFactoryBean.java:549)
	at org.springframework.orm.hibernate3.AbstractSessionFactoryBean.afterPropertiesSet(AbstractSessionFactoryBean.java:211)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1514)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1452)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:519)
	at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:456)
	at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:294)
	at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:225)
	at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:291)
	at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:193)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:567)
	at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:913)
	at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:464)
	at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:384)
	at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
	at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:111)
	at org.mortbay.jetty.handler.ContextHandler.startContext(ContextHandler.java:543)
	at org.mortbay.jetty.servlet.Context.startContext(Context.java:136)
	at org.mortbay.jetty.webapp.WebAppContext.startContext(WebAppContext.java:1220)
	at org.mortbay.jetty.handler.ContextHandler.doStart(ContextHandler.java:513)
	at org.mortbay.jetty.webapp.WebAppContext.doStart(WebAppContext.java:448)
	at com.google.gwt.dev.shell.jetty.JettyLauncher$WebAppContextWithReload.doStart(JettyLauncher.java:468)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
	at org.mortbay.jetty.handler.RequestLogHandler.doStart(RequestLogHandler.java:115)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
	at org.mortbay.jetty.handler.HandlerWrapper.doStart(HandlerWrapper.java:130)
	at org.mortbay.jetty.Server.doStart(Server.java:222)
	at org.mortbay.component.AbstractLifeCycle.start(AbstractLifeCycle.java:39)
	at com.google.gwt.dev.shell.jetty.JettyLauncher.start(JettyLauncher.java:672)
	at com.google.gwt.dev.DevMode.doStartUpServer(DevMode.java:509)
	at com.google.gwt.dev.DevModeBase.startUp(DevModeBase.java:1068)
	at com.google.gwt.dev.DevModeBase.run(DevModeBase.java:811)
	at com.google.gwt.dev.DevMode.main(DevMode.java:311)

Je comprends pas, j'ai la librairie sf4j-api avec la classe org.slf4j.LoggerFactory.

Notons que le war compilé par GWT (par Maven) ou le dossier compité (sauce Eclipse->GWT->Compile) ne fonctionne pas sous un Tomcat