请你帮我解决这个例外吗？我查看了论坛，但我找不到任何解决方案。 我找不到nullPointer的原因！ 我正在使用spring，hibernate和jsf。我既不能将bean插入数据库也不能获取行并将它们打印到dataTable中。 错误：
shade = ...faces-config.xml：
Avertissement: #{beanMateriel.insert()}: java.lang.NullPointerException
javax.faces.FacesException: #{beanMateriel.insert()}: java.lang.NullPointerException
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:118)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:745)
Caused by: javax.faces.el.EvaluationException: java.lang.NullPointerException
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
... 35 more
Caused by: java.lang.NullPointerException
at jsf.bean.BeanMateriel.insert(BeanMateriel.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at javax.el.ELUtil.invokeMethod(ELUtil.java:332)
at javax.el.BeanELResolver.invoke(BeanELResolver.java:537)
at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256)
at com.sun.el.parser.AstValue.invoke(AstValue.java:283)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
... 36 more
Grave: javax.faces.el.EvaluationException: java.lang.NullPointerException
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:101)
at com.sun.faces.application.ActionListenerImpl.processAction(ActionListenerImpl.java:102)
at javax.faces.component.UICommand.broadcast(UICommand.java:315)
at javax.faces.component.UIViewRoot.broadcastEvents(UIViewRoot.java:790)
at javax.faces.component.UIViewRoot.processApplication(UIViewRoot.java:1282)
at com.sun.faces.lifecycle.InvokeApplicationPhase.execute(InvokeApplicationPhase.java:81)
at com.sun.faces.lifecycle.Phase.doPhase(Phase.java:101)
at com.sun.faces.lifecycle.LifecycleImpl.execute(LifecycleImpl.java:198)
at javax.faces.webapp.FacesServlet.service(FacesServlet.java:646)
at org.apache.catalina.core.StandardWrapper.service(StandardWrapper.java:1682)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:318)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:160)
at org.apache.catalina.core.StandardPipeline.doInvoke(StandardPipeline.java:734)
at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:673)
at com.sun.enterprise.web.WebPipeline.invoke(WebPipeline.java:99)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:174)
at org.apache.catalina.connector.CoyoteAdapter.doService(CoyoteAdapter.java:415)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:282)
at com.sun.enterprise.v3.services.impl.ContainerMapper$HttpHandlerCallable.call(ContainerMapper.java:459)
at com.sun.enterprise.v3.services.impl.ContainerMapper.service(ContainerMapper.java:167)
at org.glassfish.grizzly.http.server.HttpHandler.runService(HttpHandler.java:201)
at org.glassfish.grizzly.http.server.HttpHandler.doHandle(HttpHandler.java:175)
at org.glassfish.grizzly.http.server.HttpServerFilter.handleRead(HttpServerFilter.java:235)
at org.glassfish.grizzly.filterchain.ExecutorResolver$9.execute(ExecutorResolver.java:119)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeFilter(DefaultFilterChain.java:284)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.executeChainPart(DefaultFilterChain.java:201)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.execute(DefaultFilterChain.java:133)
at org.glassfish.grizzly.filterchain.DefaultFilterChain.process(DefaultFilterChain.java:112)
at org.glassfish.grizzly.ProcessorExecutor.execute(ProcessorExecutor.java:77)
at org.glassfish.grizzly.nio.transport.TCPNIOTransport.fireIOEvent(TCPNIOTransport.java:561)
at org.glassfish.grizzly.strategies.AbstractIOStrategy.fireIOEvent(AbstractIOStrategy.java:112)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.run0(WorkerThreadIOStrategy.java:117)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy.access$100(WorkerThreadIOStrategy.java:56)
at org.glassfish.grizzly.strategies.WorkerThreadIOStrategy$WorkerThreadRunnable.run(WorkerThreadIOStrategy.java:137)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.doWork(AbstractThreadPool.java:565)
at org.glassfish.grizzly.threadpool.AbstractThreadPool$Worker.run(AbstractThreadPool.java:545)
at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NullPointerException
at jsf.bean.BeanMateriel.insert(BeanMateriel.java:108)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.lang.reflect.Method.invoke(Method.java:483)
at javax.el.ELUtil.invokeMethod(ELUtil.java:332)
at javax.el.BeanELResolver.invoke(BeanELResolver.java:537)
at javax.el.CompositeELResolver.invoke(CompositeELResolver.java:256)
at com.sun.el.parser.AstValue.invoke(AstValue.java:283)
at com.sun.el.MethodExpressionImpl.invoke(MethodExpressionImpl.java:304)
at com.sun.faces.facelets.el.TagMethodExpression.invoke(TagMethodExpression.java:105)
at javax.faces.component.MethodBindingMethodExpressionAdapter.invoke(MethodBindingMethodExpressionAdapter.java:87)
... 36 more
applicationContext.xml：
<?xml version='1.0' encoding='UTF-8'?>
<faces-config version="2.2"
xmlns="http://xmlns.jcp.org/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-facesconfig_2_2.xsd">
<application>
<el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
</application>
<managed-bean>
<managed-bean-name>beanMateriel</managed-bean-name>
<managed-bean-class>jsf.bean.BeanMateriel</managed-bean-class>
<managed-bean-scope>request</managed-bean-scope>
<managed-property>
<property-name>materielBO</property-name>
<value>#{materielBO}</value>
</managed-property>
</managed-bean>
</faces-config>
web.xml：
<?xml version='1.0' encoding='UTF-8' ?>
<!-- was: <?xml version="1.0" encoding="UTF-8"?> -->
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:p="http://www.springframework.org/schema/p"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:tx="http://www.springframework.org/schema/tx"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.0.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-4.0.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.0.xsd">
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<property name="driverClassName" value="org.apache.derby.jdbc.ClientDriver"></property>
<property name="url" value="jdbc:derby://localhost:1527/InterventionsDB;create=true"></property>
<property name="username" value="omar"/>
<property name="password" value="omar"/>
</bean>
<aop:config proxy-target-class='true'/>
<bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref = "dataSource"/>
<property name="configLocation">
<value>classpath:hibernate.cfg.xml</value>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.DerbyDialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="connection.autoReconnect">true</prop>
<prop key="connection.autoReconnectForPools">true</prop>
<prop key="connection.is-connection-validation-required">true</prop>
</props>
</property>
</bean>
<tx:annotation-driven/>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<bean id ="materielDAO" class = "dao.ImplMateriel">
<property name ="sessionFactory" ref="sessionFactory"></property>
</bean>
<bean id ="materielBO" class = "bo.MaterielImplBO">
<property name ="materielDAO" ref="materielDAO"></property>
</bean>
</beans>
materiel.xhtml：
<?xml version="1.0" encoding="UTF-8"?>
<web-app version="3.1" xmlns="http://xmlns.jcp.org/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://xmlns.jcp.org/xml/ns/javaee http://xmlns.jcp.org/xml/ns/javaee/web-app_3_1.xsd">
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>
classpath*:/WEB-INF/applicationContext.xml
</param-value>
</context-param>
<context-param>
<param-name>javax.faces.PROJECT_STAGE</param-name>
<param-value>Development</param-value>
</context-param>
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<listener>
<listener-class>org.springframework.web.context.request.RequestContextListener</listener-class>
</listener>
<servlet>
<servlet-name>dispatcher</servlet-name>
<servlet-class>org.springframework.web.servlet.DispatcherServlet</servlet-class>
<load-on-startup>2</load-on-startup>
</servlet>
<servlet>
<servlet-name>Faces Servlet</servlet-name>
<servlet-class>javax.faces.webapp.FacesServlet</servlet-class>
<load-on-startup>1</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>dispatcher</servlet-name>
<url-pattern>*.htm</url-pattern>
</servlet-mapping>
<servlet-mapping>
<servlet-name>Faces Servlet</servlet-name>
<url-pattern>*.xhtml</url-pattern>
</servlet-mapping>
<session-config>
<session-timeout>
30
</session-timeout>
</session-config>
<welcome-file-list>
<welcome-file>faces/login.xhtml</welcome-file>
<welcome-file>redirect.jsp</welcome-file>
</welcome-file-list>
</web-app>
BeanMateriel.java：
<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE html>
<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:p="http://primefaces.org/ui">
<h:head>
<title>Fiche Materiel</title>
<meta name="viewport" content="width=device-width, initial-scale=1.0"/>
</h:head>
<h:body>
<h:form>
<h1 style="FONT-SIZE: xx-large; color:#8080C0;font-family:Times New Roman;"></h1>
<h:panelGrid>
<table>
<tr>
<TD>
<p:outputLabel for="codem" value="Code Matériel" />
</TD>
<td>
<p:inputText id="codem" value="#{beanMateriel.codem}" label="CodeM" required="true"></p:inputText>
</td>
</tr>
<tr><td> <p:outputLabel for="libelle" value="Libellé" /></td>
<td><p:inputText id="libelle" value="#{beanMateriel.libelle}" required="true" label="Libelle"></p:inputText></td></tr>
<tr><td> <p:outputLabel for="datemiseenservice" value="Date Mise en Service" /></td>
<td> <p:calendar id="datemiseenservice" value="#{calendarView.date2}" required="true" label="datemiseenservice"/></td></tr>
<tr><td> <p:outputLabel for="marque" value="Marque" /></td>
<td><p:inputText id="marque" value="#{beanMateriel.marque}" required="true" label="marque"></p:inputText></td></tr>
<tr><td> <p:outputLabel for="departement" value="Département" /></td>
<td> <p:inputText id="departement" value="#{beanMateriel.departement}" required="true" label="departement"></p:inputText></td></tr>
<tr>
<td></td>
<td><p:commandButton value="Valider" type="submit" icon="ui-icon-check" action="#{beanMateriel.insert()}" readonly="false"/></td>
</tr>
</table>
</h:panelGrid>
<p:dataTable id="table" value="#{beanMateriel.liste}" var="obj">
<p:column headerText="Code">
<h:outputText value="#{obj.codem}"></h:outputText>
</p:column>
<p:column headerText="Libelle">
<h:outputText value="#{obj.libelle}"></h:outputText>
</p:column>
<p:column headerText="Marque">
<h:outputText value="#{obj.marque}"></h:outputText>
</p:column>
<p:column headerText="Date mise en service">
<h:outputText value="#{obj.datemiseenservice}"></h:outputText>
</p:column>
<p:column headerText="Département">
<h:outputText value="#{obj.departement}"></h:outputText>
</p:column>
<p:column headerText="modifier">
<p:commandButton icon="ui-icon-star" title="Icon Only" action="#{beanMateriel.update()}" immediate="true">
</p:commandButton>
</p:column>
<p:column headerText="supprimer">
<p:commandButton icon="ui-icon-star" title="Icon Only" action="#{beanMateriel.delete()}" immediate="true">
</p:commandButton>
</p:column>
</p:dataTable>
</h:form>
</h:body>
</html>
ImplMateriel.java：
@ManagedBean(name="beanMateriel")
public class BeanMateriel implements Serializable{
private int codem;
private String libelle;
private String marque;
private String datemiseenservice;
private String departement;
private List<BeanMateriel> liste;
@ManagedProperty(value = "#{materielBO}")
private MaterielImplBO materielBO;
public BeanMateriel() {
}
/**
* @return the materielBO
*/
public MaterielImplBO getMaterielBO() {
return materielBO;
}
/**
* @param materielBO the materielBO to set
*/
public void setMaterielBO(MaterielImplBO materielBO) {
this.materielBO = materielBO;
}
public List<BeanMateriel> getListe() {
return liste;
}
public void setListe(List<BeanMateriel> liste) {
this.liste = liste;
}
public BeanMateriel(int codem, String libelle, String marque, String datemiseenservice, String departement, MaterielImplBO materielBO, List<BeanMateriel> liste) {
this.codem = codem;
this.libelle = libelle;
this.marque = marque;
this.datemiseenservice = datemiseenservice;
this.departement = departement;
this.materielBO = materielBO;
this.liste = liste;
}
public int getCodem() {
return codem;
}
public void setCodem(int codem) {
this.codem = codem;
}
public String getLibelle() {
return libelle;
}
public void setLibelle(String libelle) {
this.libelle = libelle;
}
public String getMarque() {
return marque;
}
public void setMarque(String marque) {
this.marque = marque;
}
public String getDatemiseenservice() {
return datemiseenservice;
}
public void setDatemiseenservice(String datemiseenservice) {
this.datemiseenservice = datemiseenservice;
}
public String getDepartement() {
return departement;
}
public void setDepartement(String departement) {
this.departement = departement;
}
public String insert() {
materielBO.insert(this);
getAll();
return "";
}
public String delete() {
materielBO.delete(this);
getAll();
return "";
}
public String update() {
materielBO.update(this);
getAll();
return "";
}
public void getAll() {
setListe(materielBO.getAll());
}
}
MaterielImplBO.java：
public class ImplMateriel extends HibernateDaoSupport implements IfaceMateriel {
@Autowired
public SessionFactory sessionFactory;
@Override
@Transactional
public void insert(Materiel obj) {
getHibernateTemplate().save(obj);
}
@Override
public void delete(Materiel obj) {
getHibernateTemplate().delete(obj);}
@Override
public void update(Materiel obj) {
getHibernateTemplate().merge(obj);
}
@Override
@Transactional
public List<Materiel> getAll() {
return (List<Materiel>) (Object)getHibernateTemplate().find("from Materiel"); }
}