Discussion :

[lekonquerant]

Bonjour,

je suis novice dans le développement avec Spring. Pour me faire la main, je travaille sur un projet dont les technologies sont les suivantes: Spring, Hibernate, JPA, Tomcat. Actuellement, j'essaie de le déployer sur un serveur tomcat et à chaque fois, j'obtiens un NullPointerException sur le bean qui me permet d'accéder aux données.
Classe InitializeDAO :

Code :

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@Transactional
public class InitializeDAO {
 
	@PersistenceContext
	private EntityManager fieldEM; 
 
	public InitializeDAO() {
 
	}
	public Map<String,String> getRegions() { 
    	final Map<String,String> lRegions = new LinkedHashMap<String, String>();
    	CcRegion r = new CcRegion();
 
    	final Query query = fieldEM.createQuery("select p from Ccion p");
 
 
       for (Object p : query.getResultList()) { 
 
       	r =(CcRegion)p;
 
       	lRegions.put(r.getId(), r.getLibelle());
 
       }
 
        return lRegions;
    }
 
    public  Map<String,Map<String,String>> getVillesByRegion(){
 
    	final Map<String,String> lRegions = getRegions();
 
    	final Map<String,Map<String,String>> lVillesByRegion = new LinkedHashMap<String, Map<String,String>>();
 
    	CcVille v = new CcVille ();
 
    	if(!lRegions.isEmpty()){
 
    		Query query = fieldEM.createQuery("select p from CVle p where p.codeRon =?1");
 
    		for (Entry<String, String> entrySet : lRegions.entrySet()){
    			query.setParameter(1, entrySet.getKey());
    			final Map <String, String> lVilles = new LinkedHashMap<String, String>();
 
    			for (Object p : query.getResultList()) { 
 
    	        	v =(CcVille)p;
    	        	lVilles.put(v.getId(), v.getLibelle());	
    	        }
 
    			lVillesByRegion.put(entrySet.getKey(), lVilles);
    		}
    	}
 
        return lVillesByRegion;
    }
 
	public EntityManager getFieldEM() {
		return fieldEM;
	}
 
 
	public void setFieldEM(EntityManager fieldEM) {
		this.fieldEM = fieldEM;
	}
}

Pour qu'elle soit instanciée, je l'ai déclarée dans mon fichier applicationContext.xml, voici les déclarations que j'ai rajoutées:

Code XML :

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<!-- transaction 
	<tx:annotation-driven />-->
	<tx:annotation-driven transaction-manager="txManager" /> 
  <bean id="txManager" class="org.springframework.orm.jpa.JpaTransactionManager"> 
    <property name="entityManagerFactory" ref="entityManagerFactory" /> 
  </bean>
 
	<bean id="entityManagerFactory" class="org.springframework.orm.jpa.LocalContainerEntityManagerFactoryBean">
        <property name="dataSource" ref="dataSource" />
        <property name="jpaVendorAdapter"> 
      		<bean class="org.springframework.orm.jpa.vendor.HibernateJpaVendorAdapter"> 
        		<property name="databasePlatform" value="org.hibernate.dialect.MySQL5InnoDBDialect" /> 
        			<!-- 
        			<property name="showSql" value="true" /> 
        			<property name="generateDdl" value="true" /> 
        			--> 
      		</bean> 
    	</property> 
    </bean>
 
	<bean id="fInitDAO" class="connect.services.InitializeDAO" /> 
 
	<!-- datasource -->
	  <bean id="dataSource" class="org.apache.tomcat.jdbc.pool.DataSource" 
		destroy-method="close" 
		lazy-init="false" 
		p:driverClassName="com.mysql.jdbc.Driver"
		p:url="jdbc:mysql://xxxxxxxx/yyyyconnectdb"
		p:username="aaaaaaa" 
		p:password="bbbbb" 
		p:initialSize="1" 
		p:maxActive="50" 
		p:maxIdle="10" 
		p:maxWait="1000" 
		p:defaultAutoCommit="false" 
		p:removeAbandoned="true" 
		p:removeAbandonedTimeout="60">
	</bean>

Puis je l'ai appelé directement dans la classe où j'en avais besoin, ici, il s'agit de la classe FillData:

Code :

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@ManagedBean
@SessionScoped
public class FillData implements Serializable{
 
	/**
         * 
         */
	private static final long serialVersionUID = 1L;
	private String fRegion;
	private String fVille;
 
	private InitializeDAO fInitDAO;
 
	private Map<String,String> fRegions = new LinkedHashMap<String, String>();
	private Map<String,String> fVilles = new LinkedHashMap<String, String>();
 
	private Map<String,Map<String,String>> fVillesParRegion = new HashMap<String, Map<String,String>>();
 
	public FillData() {
		super();
 
		fRegions = fInitDAO.getRegions();		
		fVillesParRegion = fInitDAO.getVillesByRegion();
	}
 
 
	public String getfRegion() {
		return fRegion;
	}
 
	public void setfRegion(String fRegion) {
		this.fRegion = fRegion;
	}
 
	public String getfVille() {
		return fVille;
	}
 
	public void setfVille(String fVille) {
		this.fVille = fVille;
	}
 
	public Map<String, String> getfRegions() {
		return fRegions;
	}
 
	public void setfRegions(Map<String, String> fRegions) {
		this.fRegions = fRegions;
	}
 
	public Map<String, String> getfVilles() {
		return fVilles;
	}
 
	public void setfVilles(Map<String, String> fVilles) {
		this.fVilles = fVilles;
	}
 
	public Map<String, Map<String, String>> getfVillesParRegion() {
		return fVillesParRegion;
	}
 
	public void setfVillesParRegion(
			Map<String, Map<String, String>> fVillesParRegion) {
		this.fVillesParRegion = fVillesParRegion;
	}
 
	/***/
	public void getVillesByRegion(){
		if(fRegion !=null && !fRegion.equals(""))  
			fVilles = fVillesParRegion.get(fRegion);  
	}
 
 
	public InitializeDAO getfInitDAO() {
		return fInitDAO;
	}
 
 
	public void setfInitDAO(InitializeDAO fInitDAO) {
		this.fInitDAO = fInitDAO;
	}

Pourrez vous avoir une idée du problème?
Je vous remercie d'avance pour vos réactions

[tchize_]

Tu peux donner la stacktrace de ton NullPointerException?

[lekonquerant]

Bonjour tchize_,

voici la pile d'eereur générée:

Code :

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com.sun.faces.mgbean.ManagedBeanCreationException: com.sun.faces.CANT_INSTANTIATE_CLASS
	at com.sun.faces.mgbean.BeanBuilder.newBeanInstance(BeanBuilder.java:193)
	at com.sun.faces.mgbean.BeanBuilder.build(BeanBuilder.java:102)
	at com.sun.faces.mgbean.BeanManager.createAndPush(BeanManager.java:408)
	at com.sun.faces.mgbean.BeanManager.create(BeanManager.java:268)
	at com.sun.faces.el.ManagedBeanELResolver.resolveBean(ManagedBeanELResolver.java:244)
	at com.sun.faces.el.ManagedBeanELResolver.getValue(ManagedBeanELResolver.java:116)
	at com.sun.faces.el.DemuxCompositeELResolver._getValue(DemuxCompositeELResolver.java:176)
	at com.sun.faces.el.DemuxCompositeELResolver.getValue(DemuxCompositeELResolver.java:203)
	at org.jboss.el.parser.AstIdentifier.getValue(AstIdentifier.java:44)
	at org.jboss.el.parser.AstValue.getValue(AstValue.java:63)
	at org.jboss.el.ValueExpressionImpl.getValue(ValueExpressionImpl.java:186)
	at com.sun.faces.facelets.el.TagValueExpression.getValue(TagValueExpression.java:109)
	at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:194)
	at javax.faces.component.ComponentStateHelper.eval(ComponentStateHelper.java:182)
	at javax.faces.component.UISelectItems.getValue(UISelectItems.java:129)
	at org.primefaces.renderkit.InputRenderer.getSelectItems(InputRenderer.java:55)
	at org.primefaces.component.selectonemenu.SelectOneMenuRenderer.encodeMarkup(SelectOneMenuRenderer.java:71)
	at org.primefaces.component.selectonemenu.SelectOneMenuRenderer.encodeEnd(SelectOneMenuRenderer.java:65)
	at javax.faces.component.UIComponentBase.encodeEnd(UIComponentBase.java:877)
	at com.sun.faces.renderkit.html_basic.HtmlBasicRenderer.encodeRecursive(HtmlBasicRenderer.java:312)
	at com.sun.faces.renderkit.html_basic.GridRenderer.renderRow(GridRenderer.java:185)
	at com.sun.faces.renderkit.html_basic.GridRenderer.encodeChildren(GridRenderer.java:129)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:847)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1819)
	at javax.faces.render.Renderer.encodeChildren(Renderer.java:168)
	at javax.faces.component.UIComponentBase.encodeChildren(UIComponentBase.java:847)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1819)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1822)
	at javax.faces.component.UIComponent.encodeAll(UIComponent.java:1822)
	at com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView(FaceletViewHandlingStrategy.java:447)
	at com.sun.faces.application.view.MultiViewHandler.renderView(MultiViewHandler.java:124)
	at javax.faces.application.ViewHandlerWrapper.renderView(ViewHandlerWrapper.java:286)
	at com.sun.faces.lifecycle.RenderResponsePhase.execute(RenderResponsePhase.java:120)
	at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
	at com.sun.faces.lifecycle.LifecycleImpl.render(LifecycleImpl.java:139)
	at javax.faces.webapp.FacesServlet.service(FacesServlet.java:594)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:303)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at com.kmer.connect.web.filter.NoPageCacheFilter.doFilter(NoPageCacheFilter.java:41)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at com.kmer.connect.web.conversation.ConversationFilter.doFilter(ConversationFilter.java:76)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at com.kmer.connect.web.filter.SessionExpirationFilter.doFilter(SessionExpirationFilter.java:46)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.primefaces.webapp.filter.FileUploadFilter.doFilter(FileUploadFilter.java:98)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at com.kmer.connect.web.filter.LogContextFilter.doFilter(LogContextFilter.java:39)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at com.kmer.connect.web.filter.LocaleResolverRequestFilter.doFilterInternal(LocaleResolverRequestFilter.java:52)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.omnifaces.filter.GzipResponseFilter.doFilter(GzipResponseFilter.java:149)
	at org.omnifaces.filter.HttpFilter.doFilter(HttpFilter.java:75)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:330)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.invoke(FilterSecurityInterceptor.java:118)
	at org.springframework.security.web.access.intercept.FilterSecurityInterceptor.doFilter(FilterSecurityInterceptor.java:84)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.access.ExceptionTranslationFilter.doFilter(ExceptionTranslationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.session.SessionManagementFilter.doFilter(SessionManagementFilter.java:103)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.authentication.AnonymousAuthenticationFilter.doFilter(AnonymousAuthenticationFilter.java:113)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.servletapi.SecurityContextHolderAwareRequestFilter.doFilter(SecurityContextHolderAwareRequestFilter.java:54)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.savedrequest.RequestCacheAwareFilter.doFilter(RequestCacheAwareFilter.java:45)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.authentication.www.BasicAuthenticationFilter.doFilter(BasicAuthenticationFilter.java:150)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:183)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.authentication.logout.LogoutFilter.doFilter(LogoutFilter.java:105)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:87)
	at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:342)
	at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:192)
	at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:160)
	at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:343)
	at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:260)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:88)
	at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.tomcat.websocket.server.WsFilter.doFilter(WsFilter.java:52)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:208)
	at net.bull.javamelody.MonitoringFilter.doFilter(MonitoringFilter.java:181)
	at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:241)
	at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:208)
	at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:220)
	at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:122)
	at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:501)
	at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171)
	at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
	at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:683)
	at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
	at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
	at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1040)
	at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:607)
	at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:314)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
	at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
	at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
	at kmer.connect.view.newofferform.FillData.<init>(FillData.java:37)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)
	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)
	at java.lang.reflect.Constructor.newInstance(Constructor.java:526)
	at java.lang.Class.newInstance(Class.java:379)
	at com.sun.faces.mgbean.BeanBuilder.newBeanInstance(BeanBuilder.java:188)
	... 120 more