我正在使用Spring MVC和JPA / Hibernate框架开发ERP。
我的问题是服务层中的bean construireBilanImpl无法实例化，因为opmanimpl字段无法自动装配并返回NullPointerException
com.ensi.erp.metier.CreerBilanImpl：
@Transactional
@Component
public class ConstruireBilanImpl implements ConstruireBilan {
@Autowired(required=true)
private OperationManager opmanimpl ;
private float immobilisations_corporelles=sommeComptes(1266,1322);
public ConstruireBilanImpl(){};
public void setOpmanimpl(OperationManagerImpl x){opmanimpl=x;}
public float sommeComptes(int... doubles){
if (this.opmanimpl==null){System.out.println("BAAAAAAAAAAAAAADDDDDDDDDD");}
return opmanimpl.sommeComptes(doubles);
}
com.ensi.dao.OperationMnagerImpl：
@Component
public class OperationManagerImpl implements OperationManager {
@PersistenceContext(unitName="ERP")
private EntityManager em;
public OperationManagerImpl(){};
public void setEm(EntityManager emm){em=emm;}
public void creerOperation(opération op) {
if (em!=null){System.out.print(" manager de bean initialisé");}
em.persist(op);
System.out.println("dou5oul---------2");}
public opération rechercherOperation(int clé){
opération oper=em.find(opération.class,clé);
return oper;
}
public void supprimerOperation(int clé)
{
opération oper=em.find(opération.class,clé);
em.remove(oper);
}
public void modifierId(int clé,int nv){
opération oper=em.find(opération.class,clé);
oper.setIdop(nv);
em.flush();
}
public void modifierJournal(int clé,char j){
opération oper=em.find(opération.class,clé);
oper.setJournal(j);
em.flush();
}
public void modifierCompte(int clé,int nvc){
opération oper=em.find(opération.class,clé);
oper.setCompte(nvc);
em.flush();
}
public void modifierLibellé(int clé,String nvl ){
opération oper=em.find(opération.class,clé);
oper.setLibellé(nvl);
em.flush();
}
public void modifierDate(int clé,Date nvd){
opération oper=em.find(opération.class,clé);
oper.setDateop(nvd);
em.flush();
}
public void modifierDr(int clé,float nvdr){
opération oper=em.find(opération.class,clé);
oper.setDr(nvdr);
em.flush();
}
public void modifierCr(int clé,float nvcr){
opération oper=em.find(opération.class,clé);
oper.setCr(nvcr);
em.flush();
}
public List<opération> listeOpération() {
String ss="select op from opération op";
Query req= em.createQuery(ss);
return req.getResultList();
}
public void SupprimerOpération(int ref){
opération op=em.find(opération.class, ref);
em.remove(op);
}
public float sommeComptes(int... doubles) {
String liste= new String();
String x;
for (int d : doubles) {
x=Integer.toString(d);
x=x.concat(",");
liste=liste.concat(x);
}
liste=liste.substring(0, liste.length()-1);
String cc =" select sum(op.cr) from opération op ";
System.out.println(cc);
Query req= em.createQuery(cc);
Number somme=(Number)req.getSingleResult();
return somme.floatValue();
}
}
堆栈跟踪：
INFO : org.springframework.web.context.ContextLoader - Root WebApplicationContext: initialization started
INFO : org.springframework.web.context.support.XmlWebApplicationContext - Refreshing Root WebApplicationContext: startup date [Mon Jun 23 20:01:45 CEST 2014]; root of context hierarchy
INFO : org.springframework.beans.factory.xml.XmlBeanDefinitionReader - Loading XML bean definitions from URL [file:/C:/Users/housseminfo/workspace/.metadata/.plugins/org.eclipse.wst.server.core/tmp0/wtpwebapps/ERP_PCD/WEB-INF/classes/root-context.xml]
INFO : org.springframework.context.annotation.ClassPathBeanDefinitionScanner - JSR-250 'javax.annotation.ManagedBean' found and supported for component scanning
INFO : org.springframework.context.annotation.ClassPathBeanDefinitionScanner - JSR-330 'javax.inject.Named' annotation found and supported for component scanning
INFO : org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor - JSR-330 'javax.inject.Inject' annotation found and supported for autowiring
INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Pre-instantiating singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@5168781e: defining beans [datasource,persistenceUnitManager,entityManagerFactory,transactionManager,operationmanager,opser,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.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,operationController,operationManagerImpl,homeController,construireBilanImpl,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy
INFO : org.springframework.beans.factory.support.DefaultListableBeanFactory - Destroying singletons in org.springframework.beans.factory.support.DefaultListableBeanFactory@5168781e: defining beans [datasource,persistenceUnitManager,entityManagerFactory,transactionManager,operationmanager,opser,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.internalConfigurationAnnotationProcessor,org.springframework.context.annotation.internalAutowiredAnnotationProcessor,org.springframework.context.annotation.internalRequiredAnnotationProcessor,org.springframework.context.annotation.internalCommonAnnotationProcessor,org.springframework.context.annotation.internalPersistenceAnnotationProcessor,operationController,operationManagerImpl,homeController,construireBilanImpl,org.springframework.context.annotation.ConfigurationClassPostProcessor.importAwareProcessor]; root of factory hierarchy
ERROR: org.springframework.web.context.ContextLoader - Context initialization failed
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'operationController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.metier.ConstruireBilan com.ensi.erp.controllers.OperationController.bil; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'construireBilanImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.dao.OperationManager com.ensi.erp.metier.ConstruireBilanImpl.opmanimpl; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1120)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:522)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:607)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4961)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5455)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$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$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.metier.ConstruireBilan com.ensi.erp.controllers.OperationController.bil; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'construireBilanImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.dao.OperationManager com.ensi.erp.metier.ConstruireBilanImpl.opmanimpl; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)
... 23 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'construireBilanImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.dao.OperationManager com.ensi.erp.metier.ConstruireBilanImpl.opmanimpl; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1120)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:522)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:873)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:815)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)
... 25 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.dao.OperationManager com.ensi.erp.metier.ConstruireBilanImpl.opmanimpl; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)
... 36 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:825)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)
... 38 more
juin 23, 2014 8:01:47 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) org.springframework.web.context.ContextLoaderListener
org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'operationController': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.metier.ConstruireBilan com.ensi.erp.controllers.OperationController.bil; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'construireBilanImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.dao.OperationManager com.ensi.erp.metier.ConstruireBilanImpl.opmanimpl; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1120)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:522)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:607)
at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:932)
at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:479)
at org.springframework.web.context.ContextLoader.configureAndRefreshWebApplicationContext(ContextLoader.java:383)
at org.springframework.web.context.ContextLoader.initWebApplicationContext(ContextLoader.java:283)
at org.springframework.web.context.ContextLoaderListener.contextInitialized(ContextLoaderListener.java:112)
at org.apache.catalina.core.StandardContext.listenerStart(StandardContext.java:4961)
at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5455)
at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1559)
at org.apache.catalina.core.ContainerBase$StartChild.call(ContainerBase.java:1549)
at java.util.concurrent.FutureTask$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$Worker.run(Unknown Source)
at java.lang.Thread.run(Unknown Source)
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.metier.ConstruireBilan com.ensi.erp.controllers.OperationController.bil; nested exception is org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'construireBilanImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.dao.OperationManager com.ensi.erp.metier.ConstruireBilanImpl.opmanimpl; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)
... 23 more
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'construireBilanImpl': Injection of autowired dependencies failed; nested exception is org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.dao.OperationManager com.ensi.erp.metier.ConstruireBilanImpl.opmanimpl; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:288)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1120)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:522)
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:461)
at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:295)
at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:223)
at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:292)
at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:194)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.findAutowireCandidates(DefaultListableBeanFactory.java:873)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:815)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)
... 25 more
Caused by: org.springframework.beans.factory.BeanCreationException: Could not autowire field: private com.ensi.erp.dao.OperationManager com.ensi.erp.metier.ConstruireBilanImpl.opmanimpl; nested exception is org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:514)
at org.springframework.beans.factory.annotation.InjectionMetadata.inject(InjectionMetadata.java:87)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor.postProcessPropertyValues(AutowiredAnnotationBeanPostProcessor.java:285)
... 36 more
Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [com.ensi.erp.dao.OperationManager] is defined: expected single matching bean but found 2: [operationmanager, operationManagerImpl]
at org.springframework.beans.factory.support.DefaultListableBeanFactory.doResolveDependency(DefaultListableBeanFactory.java:825)
at org.springframework.beans.factory.support.DefaultListableBeanFactory.resolveDependency(DefaultListableBeanFactory.java:730)
at org.springframework.beans.factory.annotation.AutowiredAnnotationBeanPostProcessor$AutowiredFieldElement.inject(AutowiredAnnotationBeanPostProcessor.java:486)
... 38 more
答案 0 :(得分：1)
接口OperationManager也可能有其他实现类。因此，Spring无法确定必须创建哪个实现。如果是这种情况，那么下面应该有所帮助。此外，界面不需要标记为Component。
@Autowired(required=true)
@Qualifier("operationManagerImpl")
private OperationManager opmanimpl ;
答案 1 :(得分：0)
这是因为Spring没有opmanimpl找到bean，请使用
@Autowired(required=true)
@Qualifier("operationManagerImpl")
private OperationManager opmanimpl ;
答案 2 :(得分：0)
堆栈跟踪清楚地表明您有多个bean有资格进行自动装配。您还没有显示您的配置，但我怀疑您正在使用组件扫描，然后还明确定义了一个bean。选一个。