SessionFactory初始化null指針spring 3+ hibernate 4+

我有一個奇怪的問題當spring嘗試初始化sessionFactory時，spring返回null。我沒有在我的代碼中注入它在上下文是初始化時拋出null。SessionFactory初始化null指針spring 3+ hibernate 4+

import java.util.List; 
import org.springframework.stereotype.Repository; 
import org.springframework.transaction.annotation.Transactional; 
import fr.demo.bean.Client; 
import fr.demo.service.dao.ClientDAO; 

@Transactional 
@Repository 
public class ClientDAOImpl implements ClientDAO{ 

// @Autowired 
// private SessionFactory sessionFactory; 

    @Override 
    public Integer create(Client obj) { 
    return null; 
    } 
    @Override 
    public void delete(Client obj) { 
    } 
    @Override 
    public void update(Client obj) { 
    } 
    @Override 
    public Client find(Integer id) { 
     return null; 
    } 
    @Override 
    public List<Client> findAll() { 
     return null; 
    } 
}

這是錯誤我有：

org.springframework.beans.factory.BeanCreationException：錯誤創建名爲 'SessionFactory的' 在ServletContext的定義資源豆[/ WEB-INF /resources/spring/database/DataSource.xml]：調用init方法失敗;嵌套的例外是顯示java.lang.NullPointerException

我讓你知道它當我寫的映射SessionFactory的，我有這個錯誤中冬眠。所以這是我的映射

@Entity 
@Table(name="client") 
public class Client implements Serializable{ 
    /** 
    * 
    */ 
    private static final long serialVersionUID = 8707073906887139645L; 
    @Id 
    @GeneratedValue(strategy = GenerationType.AUTO) 
    private Integer id; 
    @Column(name="nom", nullable=false, length=100) 
    private String nom; 
    @Column(name="prenom", nullable=false, length=100) 
    private String prenom; 
    @Column(name="adresse", nullable=false, length=100) 
    private String adresse; 
    @Column(name="telephone", nullable=false, length=100) 
    private String telephone; 
    @Column(name="email", nullable=false, length=100) 
    private String email; 
    private String image; 
}

這是servlet上下文：

<?xml version="1.0" encoding="UTF-8"?> 
<!-- <!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN" "http://www.springframework.org/dtd/spring-beans.dtd"> --> 
<beans xmlns="http://www.springframework.org/schema/beans" 
     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" 
     xmlns:mvc="http://www.springframework.org/schema/mvc" 
     xmlns:context="http://www.springframework.org/schema/context" 
     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
          http://www.springframework.org/schema/mvc http://www.springframework.org/schema/mvc/spring-mvc-3.0.xsd 
          http://www.springframework.org/schema/context 
          http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 

    <mvc:annotation-driven/> 
    <mvc:default-servlet-handler/> 
    <context:annotation-config/> 
    <context:component-scan base-package="fr.demo.service.web"/> 
    <bean id="messageSource" class="org.springframework.context.support.ReloadableResourceBundleMessageSource"> 
     <property name="basename" value="/WEB-INF/errors"/> 
    </bean> 
    <bean id="validator" class="org.springframework.validation.beanvalidation.LocalValidatorFactoryBean"/> 
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
     <property name="viewClass"> 
      <value>org.springframework.web.servlet.view.JstlView</value> 
     </property> 
     <property name="prefix"> 
      <value>/WEB-INF/views/</value> 
     </property> 
     <property name="suffix"> 
      <value>.jsp</value> 
     </property> 
    </bean> 
    <import resource="../database/DataSource.xml"/> 
    <import resource="../database/Hibernate.xml"/> 
    <context:component-scan base-package="fr.demo.service.dao" /> 
</beans>

並全面跟蹤

SEVERE: StandardWrapper.Throwable 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'sessionFactory' defined in ServletContext resource [/WEB-INF/resources/spring/database/DataSource.xml]: Invocation of init method failed; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1488) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:524) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:608) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479) 
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:651) 
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:599) 
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:665) 
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:518) 
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:459) 
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) 
    at javax.servlet.GenericServlet.init(GenericServlet.java:160) 
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280) 
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193) 
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:865) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:136) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source) 
Caused by: java.lang.NullPointerException 
    at org.apache.catalina.loader.WebappClassLoader.findLoadedResource(WebappClassLoader.java:3266) 
    at org.apache.catalina.loader.WebappClassLoader.getResourceAsStream(WebappClassLoader.java:1480) 
    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:154) 
    at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:291) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1547) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1485) 
    ... 33 more 

May 11, 2013 1:37:55 PM org.apache.catalina.core.StandardWrapperValve invoke 
SEVERE: Allocate exception for servlet spring-mvc 
java.lang.NullPointerException 
    at org.apache.catalina.loader.WebappClassLoader.findLoadedResource(WebappClassLoader.java:3266) 
    at org.apache.catalina.loader.WebappClassLoader.getResourceAsStream(WebappClassLoader.java:1480) 
    at org.springframework.core.io.ClassPathResource.getInputStream(ClassPathResource.java:154) 
    at org.springframework.orm.hibernate4.LocalSessionFactoryBean.afterPropertiesSet(LocalSessionFactoryBean.java:291) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.invokeInitMethods(AbstractAutowireCapableBeanFactory.java:1547) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.initializeBean(AbstractAutowireCapableBeanFactory.java:1485) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:524) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:608) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479) 
    at org.springframework.web.servlet.FrameworkServlet.configureAndRefreshWebApplicationContext(FrameworkServlet.java:651) 
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:599) 
    at org.springframework.web.servlet.FrameworkServlet.createWebApplicationContext(FrameworkServlet.java:665) 
    at org.springframework.web.servlet.FrameworkServlet.initWebApplicationContext(FrameworkServlet.java:518) 
    at org.springframework.web.servlet.FrameworkServlet.initServletBean(FrameworkServlet.java:459) 
    at org.springframework.web.servlet.HttpServletBean.init(HttpServletBean.java:136) 
    at javax.servlet.GenericServlet.init(GenericServlet.java:160) 
    at org.apache.catalina.core.StandardWrapper.initServlet(StandardWrapper.java:1280) 
    at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:1193) 
    at org.apache.catalina.core.StandardWrapper.allocate(StandardWrapper.java:865) 
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:136) 
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:123) 
    at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:472) 
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:171) 
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:99) 
    at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:936) 
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:118) 
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:407) 
    at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1004) 
    at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:589) 
    at org.apache.tomcat.util.net.JIoEndpoint$SocketProcessor.run(JIoEndpoint.java:310) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source) 
    at java.lang.Thread.run(Unknown Source)

我的數據源配置的bean：

<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:jee="http://www.springframework.org/schema/jee" 
     xmlns:lang="http://www.springframework.org/schema/lang" 
     xmlns:p="http://www.springframework.org/schema/p" 
     xmlns:tx="http://www.springframework.org/schema/tx" 
     xmlns:util="http://www.springframework.org/schema/util" 
     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.xsd 
      http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd 
      http://www.springframework.org/schema/jee http://www.springframework.org/schema/jee/spring-jee.xsd 
      http://www.springframework.org/schema/lang http://www.springframework.org/schema/lang/spring-lang.xsd 
      http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd 
      http://www.springframework.org/schema/util http://www.springframework.org/schema/util/spring-util.xsd"> 

     <!-- Declaration de la DATASOURCES --> 
     <bean class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"> 
      <property name="location"> 
       <value>/WEB-INF/resources/properties/database.properties</value> 
      </property> 
     </bean> 
     <bean id="datasource" 
      class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
      <property name="driverClassName" value="${db.driverClassName}" /> 
      <property name="url" value="${db.url}" /> 
      <property name="username" value="${db.username}" /> 
      <property name="password" value="" /> 
     </bean> 
     <!-- Declaration Session Factory --> 
     <bean id="sessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> 
      <property name="dataSource" ref="datasource" /> 
      <property name="mappingResources"> 
       <list> 
        <value>fr.demo.bean.Client</value> 
       </list> 
      </property> 
      <property name="hibernateProperties"> 
       <props> 
        <prop key="hibernate.dialect"> 
         org.hibernate.dialect.MySQLDialect 
        </prop> 
        <prop key="hibernate.show_sql">true</prop> 
        <prop key="hibernate.connection.autocommit">true</prop> 
       </props> 
      </property> 
     </bean> 
     <bean id="transactionManager" 
      class="org.springframework.orm.hibernate4.HibernateTransactionManager"> 
      <property name="sessionFactory" ref="sessionFactory" /> 
      <property name="dataSource" ref="datasource" /> 
     </bean> 
     <tx:annotation-driven transaction-manager="transactionManager"/> 

    </beans>

來源

2013-05-10 user2110674

向我們展示DataSource.xml文件和異常的完整堆棧跟蹤。 – 2013-05-11 08:03:49

我編輯我的文章與數據源/完整跟蹤，謝謝 – user2110674 2013-05-11 13:07:42

的問題見MS是具有以下配置：

<property name="mappingResources"> 
    <list> 
     <value>fr.demo.bean.Client</value> 
    </list> 
</property>

的javadoc for setMappingResources說：

集Hibernate映射的資源來在類路徑中找到，如「example.hbm.xml」或「mypackage的/示例.hbm.xml「

所以你的配置告訴Spring在根包中尋找一個名爲fr.demo.bean.Client的文件，這是錯誤的。如果要指定註釋類的名稱，請使用... annotatedClasses

來源

2013-05-11 13:20:20

天哪，非常感謝 – user2110674 2013-05-11 14:56:29

SessionFactory初始化null指針spring 3+ hibernate 4+

回答

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