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我有一个Web应用程序，至少使用JSF 2.0，Spring 3.0和Hibernate 4.经过两天的设置，我终于在我的数据表中得到了一个列表，但我也遇到了一个问题。我可以告诉大家，因为我看到了服务类使用控制台错误：java.lang.NoClassDefFoundError：Lcom/ardia/service/ComposantService;与弹簧
我的服务类：
package com.ardia.service;
@Service("compService")
@Transactional
public class ComposantImp implements ComposantService {
@Autowired
SessionFactory sessionFactory;
@Override
public void inserComposant(Composant comp) {
// TODO Auto-generated method stub
sessionFactory.getCurrentSession().saveOrUpdate(comp);
}
@Override
public Composant getComposantById(int compId) {
// TODO Auto-generated method stub
return (Composant) sessionFactory.
getCurrentSession().
get(Composant.class, compId);
}
@Override
public Composant getComposant(String compname) {
// TODO Auto-generated method stub
return null;
}
@Override
@SuppressWarnings("unchecked")
public List<Composant> getComposants() {
// TODO Auto-generated method stub
Criteria criteria = sessionFactory.
getCurrentSession().
createCriteria(Composant.class);
return criteria.list();
}
}
我bean类：
package com.ardia.beans;
import java.util.List;
import javax.annotation.PostConstruct;
import javax.faces.bean.ManagedBean;
import javax.faces.bean.ManagedProperty;
import javax.faces.bean.SessionScoped;
import com.ardia.model.Composant;
import com.ardia.service.ComposantService;
@ManagedBean(name="userMB")
@SessionScoped
public class Composantbeam {
@ManagedProperty(value="#{compService}")
ComposantService service;
private List<Composant> list;
@PostConstruct
public void init() {
list=service.getComposants();
}
public List<Composant> getList() {
return list;
}
public void setList(List<Composant> list) {
this.list = list;
}
public ComposantService getService() {
return service;
}
public void setService(ComposantService service) {
this.service = service;
}
}
我faces-config.xml中：
<faces-config
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-facesconfig_2_0.xsd"
version="2.0">
<application>
<el-resolver>org.springframework.web.jsf.el.SpringBeanFacesELResolver</el-resolver>
</application>
</faces-config>
我的web.xml：
<web-app id="WebApp_ID" version="3.0"
xmlns="http://java.sun.com/xml/ns/javaee"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_3_0.xsd">
<display-name>PFE</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/application.xml</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>
<context-param>
<description>State saving method: 'client' or 'server' (=default). See JSF Specification 2.5.2</description>
<param-name>javax.faces.STATE_SAVING_METHOD</param-name>
<param-value>client</param-value>
</context-param>
<context-param>
<param-name>javax.servlet.jsp.jstl.fmt.localizationContext</param-name>
<param-value>resources.application</param-value>
</context-param>
<listener>
<listener-class>com.sun.faces.config.ConfigureListener</listener-class>
</listener>
<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>Faces Servlet</servlet-name>
<url-pattern>*.jsf</url-pattern>
</servlet-mapping>
<welcome-file-list>
<welcome-file>/Test.jsp</welcome-file>
</welcome-file-list>
</web-app>
Spring配置：在我的JSF页面的作品
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns:aop="http://www.springframework.org/schema/aop"
xmlns:context="http://www.springframework.org/schema/context"
xmlns:tx="http://www.springframework.org/schema/tx"
xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd
http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.1.xsd
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.1.xsd
http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-3.1.xsd">
<context:component-scan base-package="ardia.beans" />
<context:component-scan base-package="com.ardia.service" />
<!-- Data Source Declaration -->
<bean id="DataSource" class="org.apache.commons.dbcp.BasicDataSource" >
<property name="driverClassName" value="org.postgresql.Driver" />
<property name="url" value="jdbc:postgresql:PFE" />
<property name="username" value="postgres" />
<property name="password" value="root" />
</bean>
<!-- Session Factory Declaration -->
<bean id="SessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="DataSource" />
<property name="packagesToScan" value="com.ardia.model" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<tx:annotation-driven transaction-manager="transactionManager"/>
<bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager" >
<property name="sessionFactory" ref="SessionFactory"/>
</bean>
</beans>
数据表和返回值的列表。
但最终我得到以下错误：
avr. 21, 2013 12:41:43 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.sun.faces.config.ConfigureListener
java.lang.NoClassDefFoundError: Lcom/ardia/service/ComposantService;
at java.lang.Class.getDeclaredFields0(Native Method)
at java.lang.Class.privateGetDeclaredFields(Unknown Source)
at java.lang.Class.getDeclaredFields(Unknown Source)
at com.sun.faces.application.annotation.ManagedBeanConfigHandler.collectAnnotatedFields(ManagedBeanConfigHandler.java:242)
at com.sun.faces.application.annotation.ManagedBeanConfigHandler.getBeanInfo(ManagedBeanConfigHandler.java:151)
at com.sun.faces.application.annotation.ManagedBeanConfigHandler.process(ManagedBeanConfigHandler.java:137)
at com.sun.faces.application.annotation.ManagedBeanConfigHandler.push(ManagedBeanConfigHandler.java:123)
at com.sun.faces.application.annotation.AnnotationManager.applyConfigAnntations(AnnotationManager.java:196)
at com.sun.faces.config.processor.AbstractConfigProcessor.processAnnotations(AbstractConfigProcessor.java:328)
at com.sun.faces.config.processor.ManagedBeanConfigProcessor.process(ManagedBeanConfigProcessor.java:244)
at com.sun.faces.config.processor.AbstractConfigProcessor.invokeNext(AbstractConfigProcessor.java:114)
at com.sun.faces.config.processor.ValidatorConfigProcessor.process(ValidatorConfigProcessor.java:120)
at com.sun.faces.config.processor.AbstractConfigProcessor.invokeNext(AbstractConfigProcessor.java:114)
at com.sun.faces.config.processor.ConverterConfigProcessor.process(ConverterConfigProcessor.java:126)
at com.sun.faces.config.processor.AbstractConfigProcessor.invokeNext(AbstractConfigProcessor.java:114)
at com.sun.faces.config.processor.ComponentConfigProcessor.process(ComponentConfigProcessor.java:117)
at com.sun.faces.config.processor.AbstractConfigProcessor.invokeNext(AbstractConfigProcessor.java:114)
at com.sun.faces.config.processor.ApplicationConfigProcessor.process(ApplicationConfigProcessor.java:337)
at com.sun.faces.config.processor.AbstractConfigProcessor.invokeNext(AbstractConfigProcessor.java:114)
at com.sun.faces.config.processor.LifecycleConfigProcessor.process(LifecycleConfigProcessor.java:116)
at com.sun.faces.config.processor.AbstractConfigProcessor.invokeNext(AbstractConfigProcessor.java:114)
at com.sun.faces.config.processor.FactoryConfigProcessor.process(FactoryConfigProcessor.java:223)
at com.sun.faces.config.ConfigManager.initialize(ConfigManager.java:335)
at com.sun.faces.config.ConfigureListener.contextInitialized(ConfigureListener.java:223)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4765)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5260)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1525)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1515)
at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)
at java.util.concurrent.FutureTask.run(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.ClassNotFoundException: com.ardia.service.ComposantService
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1688)
at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1533)
... 34 more
avr. 21, 2013 12:41:43 PM org.apache.catalina.core.StandardContext startInternal
Grave: Error listenerStart
avr. 21, 2013 12:41:43 PM org.apache.catalina.core.StandardContext startInternal
Grave: Erreur de démarrage du contexte [/testefzefsdfsdfdfg] suite aux erreurs précédentes
avr. 21, 2013 12:41:43 PM org.apache.coyote.AbstractProtocol start
Infos: Starting ProtocolHandler ["http-bio-8585"]
avr. 21, 2013 12:41:43 PM org.apache.coyote.AbstractProtocol start
Infos: Starting ProtocolHandler ["ajp-bio-8010"]
avr. 21, 2013 12:41:43 PM org.apache.catalina.startup.Catalina start
Infos: Server startup in 15288 ms
我没有一类名为Lcom.ardia.service但我有com.ardia.service。
与大多数'java.lang.NoClassDefFoundError's它表明一个类加载问题您在类路径上具有相同类（或jar）的重复版本。摆脱注释消除了加载类的需要，这就是它工作的原因 – kolossus 2013-04-21 16:13:50