initWebApplicationContext創建名稱爲prime的bean時出錯

Question

我有以下錯誤，我不明白，因爲在另一個類中如果讓我成爲bean。我寫了下一個代碼。 app-config.xml EmpresaManagebBean.java。

錯誤

Información: Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@12839c7: defining beans [empresasController,empresasDAOImpl,empresaMB,empresasServiceImpl,org.springframework.context.annotation.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,mvcContentNegotiationManager,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerMapping#0,org.springframework.format.support.FormattingConversionServiceFactoryBean#0,org.springframework.web.servlet.mvc.method.annotation.RequestMappingHandlerAdapter#0,org.springframework.web.servlet.handler.MappedInterceptor#0,org.springframework.web.servlet.mvc.method.annotation.ExceptionHandlerExceptionResolver#0,org.springframework.web.servlet.mvc.annotation.ResponseStatusExceptionResolver#0,org.springframework.web.servlet.mvc.support.DefaultHandlerExceptionResolver#0,org.springframework.web.servlet.handler.BeanNameUrlHandlerMapping,org.springframework.web.servlet.mvc.HttpRequestHandlerAdapter,org.springframework.web.servlet.mvc.SimpleControllerHandlerAdapter,org.springframework.web.servlet.view.InternalResourceViewResolver#0,propertyConfigurer,myDataSource,mySessionFactory,transactionManager,org.springframework.aop.config.internalAutoProxyCreator,org.springframework.transaction.annotation.AnnotationTransactionAttributeSource#0,org.springframework.transaction.interceptor.TransactionInterceptor#0,org.springframework.transaction.config.internalTransactionAdvisor,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy 
nov 04, 2014 2:01:51 PM org.springframework.web.context.ContextLoader initWebApplicationContext 
Grave: Context initialization failed 
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'empresaMB' defined in file [C:\Users\ProSyth\miJee2\.metadata\.plugins\org.eclipse.wst.server.core\tmp2\wtpwebapps\Apliconta2WebPrimefaces\WEB-INF\classes\com\atorresbr\springapp\EmpresasManagedBean.class]: Instantiation of bean failed; nested exception is org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atorresbr.springapp.EmpresasManagedBean]: Constructor threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1007) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBeanInstance(AbstractAutowireCapableBeanFactory.java:953) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:487) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:458) 
    at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295) 
    at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292) 
    at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194) 
    at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:626) 
    at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932) 
    at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479) 
    at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:389) 
    at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:294) 
    at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112) 
    at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4939) 
    at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5434) 
    at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559) 
    at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549) 
    at java.util.concurrent.FutureTask.run(FutureTask.java:262) 
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145) 
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615) 
    at java.lang.Thread.run(Thread.java:744) 
Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atorresbr.springapp.EmpresasManagedBean]: Constructor threw exception; nested exception is java.lang.NullPointerException 
    at org.springframework.beans.BeanUtils.instantiateClass(BeanUtils.java:163) 
    at org.springframework.beans.factory.support.SimpleInstantiationStrategy.instantiate(SimpleInstantiationStrategy.java:87) 
    at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.instantiateBean(AbstractAutowireCapableBeanFactory.java:1000) 
    ... 22 more 

應用-config.xml中

<?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:mvc="http://www.springframework.org/schema/mvc" 
    xmlns:beans="http://www.springframework.org/schema/beans" 
    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/mvc 
    http://www.springframework.org/schema/mvc/spring-mvc-3.2.xsd 
    http://www.springframework.org/schema/beans 
    http://www.springframework.org/schema/beans/spring-beans.xsd 
    http://www.springframework.org/schema/tx 
    http://www.springframework.org/schema/tx/spring-tx-3.2.xsd 
    http://www.springframework.org/schema/context 
    http://www.springframework.org/schema/context/spring-context-3.2.xsd"> 

    <!-- Scans the classpath of this application for @Components @Service @Repository to deploy as 
     beans --> 
    <context:component-scan base-package="com.atorresbr.springapp" /> 

    <!-- Configures the @Controller programming model --> 
    <mvc:annotation-driven /> 

     <!-- Map simple view name such as "test" into /WEB-INF/test.jsp --> 
    <bean class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <property name="prefix" value="/WEB-INF/" /> 
    <property name="suffix" value=".jsp" /> 
    </bean> 

    <bean id="propertyConfigurer" 
     class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" 
     p:location="/WEB-INF/jdbc.properties" /> 

    <!-- JDBC Data Source. It is assumed you have MySQL running on localhost port 3306 with 
     username root and blank password. Change below if it's not the case --> 

     <bean id="myDataSource" 
     class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close" 
     p:driverClassName="${jdbc.driverClassName}" 
     p:url="${jdbc.databaseurl}" 
     p:username="${jdbc.username}" 
     p:password="${jdbc.password}" 
     p:validationQuery="${jdbc.validationQuery}" /> 
<!--  
    <bean id="myDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close"> 
    <property name="driverClassName" value="com.mysql.jdbc.Driver"/> 
    <property name="url" value="jdbc:mysql://localhost:3306/pizzashop"/> 
    <property name="username" value="root"/> 
    <property name="password" value=""/> 
    <property name="validationQuery" value="SELECT 1"/> 
    </bean> --> 

    <!-- Hibernate Session Factory --> 
    <bean id="mySessionFactory" class="org.springframework.orm.hibernate4.LocalSessionFactoryBean"> 
    <property name="dataSource" ref="myDataSource"/> 
    <property name="packagesToScan"> 
     <array> 
     <value>com.atorresbr.springapp</value> 
     </array> 
    </property> 
    <property name="hibernateProperties"> 
    <props> 
       <prop key="hibernate.dialect">${jdbc.dialect}</prop> 
       <prop key="hibernate.show_sql">true</prop> 
      </props> 

    </property> 
    </bean> 

    <!-- Hibernate Transaction Manager --> 
    <bean id="transactionManager" class="org.springframework.orm.hibernate4.HibernateTransactionManager"> 
    <property name="sessionFactory" ref="mySessionFactory"/> 
    </bean> 

    <!-- Activates annotation based transaction management --> 
    <tx:annotation-driven transaction-manager="transactionManager"/> 
</beans> 

EmpresaManagedBean.java

package com.atorresbr.springapp; 

import java.io.Serializable; 
import java.util.List; 

import javax.annotation.ManagedBean; 
import javax.faces.bean.ManagedProperty; 
import javax.faces.bean.RequestScoped; 

import org.apache.commons.logging.Log; 
import org.apache.commons.logging.LogFactory; 
import org.springframework.beans.factory.annotation.Autowired; 



@ManagedBean("empresaMB") 
@RequestScoped 
public class EmpresasManagedBean implements Serializable { 

    private static final long serialVersionUID = 1L; 
    protected final Log logger = LogFactory.getLog(getClass()); 
    //@Autowired private EmpresasService empresasService; 


    //Spring User Service is injected... 
    @ManagedProperty(value="#{EmpresasService}") 
    EmpresasService empresasService; 



    List<Empresas> empresaList = empresasService.findAll(); 
} 

Answer 1

的第一acktrace shows

Caused by: org.springframework.beans.BeanInstantiationException: Could not instantiate bean class [com.atorresbr.springapp.EmpresasManagedBean]: Constructor threw exception; nested exception is java.lang.NullPointerException。

您在EmpresasManagedBean的構造函數中得到了NullPointerException。 不幸的是，你沒有發佈構造函數，所以我不能幫你。