Hibernate ServiceImplementation이 NullPointerException을 던졌습니다.

Question

Spring과 Hibernate를 사용하는 프로그램에 문제가 있습니다.
departament.java

@Entity 
@Table(name="apps_departaments") 
public class Departament 
{ 
    @Id 
    @GeneratedValue 
    private int id; 

    @Column(name="dep_codi") 
    private String CodDep; 

    @Column(name="dep_nomc") 
    private String nom; 

    @Column(name="dep_nomm") 
    private String nomCurt; 
} 

departamentDAO.java

public interface DepartamentDAO 
{ 
    public void afegirDepartament(Departament dep); 
    public List<Departament> getDepartaments(); 
} 

departamentDAOImpl.java

@Repository 
public class DepartamentDAOImpl implements DepartamentDAO 
{ 
    @Autowired 
    private SessionFactory sessionFactory; 

    public void afegirDepartament(Departament dep) 
    { 
     sessionFactory.getCurrentSession().save(dep); 
    } 

    public List<Departament> getDepartaments() 
    { 
     return (List<Departament>)(sessionFactory.getCurrentSession().createCriteria(Departament.class).list()); 
    } 
} 

,691,363 :
나는이 수업을 (210)

departamentService.java

public interface DepartamentService 
{ 
    public void afegirDepartament(Departament dep); 
    public List<Departament> getDepartaments(); 
} 

departamentServiceImpl.java

@Service 
@Transactional(propagation = Propagation.SUPPORTS, readOnly = true) 
public class DepartamentServiceImp implements DepartamentService 
{ 
    @Autowired 
    private DepartamentDAO depDAO; 

    @Transactional(propagation = Propagation.REQUIRED, readOnly = false) 
    @Override 
    public void afegirDepartament(Departament dep) 
    { 
     depDAO.afegirDepartament(dep); 
    } 

    @Override 
    public List<Departament> getDepartaments() { 
     return depDAO.getDepartaments(); 
    } 
} 

내 구성 설정은 다음과 같습니다
웹 응용 프로그램-config.xml에

<?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:context="http://www.springframework.org/schema/context" 
    xmlns:p="http://www.springframework.org/schema/p" 
    xsi:schemaLocation=" 
     http://www.springframework.org/schema/beans 
     http://www.springframework.org/schema/beans/spring-beans-3.0.xsd 
     http://www.springframework.org/schema/context 
     http://www.springframework.org/schema/context/spring-context-3.0.xsd"> 

    <context:component-scan base-package="net.grupgirona.intranet" /> 
    <context:annotation-config /> 
    <context:property-placeholder location="classpath*:jdbc.properties"/> 
    <import resource="webmvc-config.xml" /> 
    <import resource="webflow-config.xml" /> 
    <import resource="data-access-config.xml" /> 
</beans> 

내가 데이터를 그런 식으로 액세서 할 때

데이터 액세스-config.xml에 확인

<?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: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-3.0.xsd 
     http://www.springframework.org/schema/tx 
     http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> 

<tx:annotation-driven transaction-manager="transactionManager" /> 
<bean id="dataSource" 
    class="org.springframework.jdbc.datasource.DriverManagerDataSource" 
    p:driverClassName="${jdbc.driverClassName}" 
    p:url="${jdbc.databaseurl}" p:username="${jdbc.username}" 
    p:password="${jdbc.password}" /> 

<bean id="sessionFactory" 
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 
    <property name="dataSource" ref="dataSource" /> 
    <property name="configurationClass"> 
     <value>org.hibernate.cfg.AnnotationConfiguration</value> 
    </property> 
    <property name="hibernateProperties"> 
     <props> 
      <prop key="hibernate.dialect">${jdbc.dialect}</prop> 
      <prop key="hibernate.show_sql">true</prop> 
      <prop key="hibernate.hbm2ddl.auto">update</prop> 
     </props> 
    </property> 
    <property name="packagesToScan" value="net.grupgirona.dades"/> 
    </bean> 

    <bean id="transactionManager" 
    class="org.springframework.orm.hibernate3.HibernateTransactionManager"> 
    <property name="sessionFactory" ref="sessionFactory" /> 
    </bean> 
</beans> 

:

DepartamentServiceImp dades = new DepartamentServiceImp(); 

을 (디버깅 할 때 dades가 null) 나는 NullPointerException이 얻을.
최대 절전 모드 출력을 읽었을 때 이상한 일이 아니며 데이터베이스 연결이 발생합니다 (최대 절전 모드가 테이블 app_departaments를 올바르게 작성했습니다).
구성에서 뭔가 빠졌는지 알 수 없습니다.

나는 어떤 도움을 호소 할 것이다. com.hpcds.grupgirona.components에서 com.hpcds.grupgirona.dades.service.imp.DepartamentServiceImp.getDepartaments에서

스택 트레이스

java.lang.NullPointerException이 (DepartamentServiceImp.java:57) (UIComponent.java : 1850) com.sun.faces.application.view.FaceletViewHandlingStrategy.renderView (FaceletViewHandlingStrategy.jav a : 440) com.sun.faces.application.view.MultiViewHandler.renderView (MultiViewHandler.java:131) at org.springframework.faces.webflow.FlowViewHandler.renderView (FlowViewHandler.java:99) at com. com.sun.faces.lifecycle.Lifecycle.LifecycleImpl에서 com.sun.faces.lifecycle.Phase.doPhase (Phase.java:101) 에있는 sun.faces.lifecycle.RenderResponsePhase.execute (RenderResponsePhase.java:120) 입니다.render (LifecycleImpl.java:202) at org.springframework.faces.mvc.JsfView.renderMergedOutputModel (JsfView.java:85) at org.springframework.web.servlet.view.AbstractView.render (AbstractView.java:250) org.springframework.web.servlet.DispatcherServlet.doDispatch에서 org.springframework.web.servlet.DispatcherServlet.render (DispatcherServlet.java:1047) (DispatcherServlet.java:817) org.springframework.web.servlet에서 에서 . DispatcherServlet.doService (DispatcherServlet.java:719) at org.springframework.web.servlet.FrameworkServlet.processRequest (FrameworkServlet.java:669) at org.springframework.web.servlet.FrameworkServlet.doGet (FrameworkServlet.java:574) HttpServlet.service (HttpServlet.java:621)의 에서(org.apache.catalina.core.ApplicationFilterChain.internalDoFilter (ApplicationFilterChain.java:305) 에서을 참조하십시오. org.springframework.web.filter.OncePerRequestFilter.doFilter (OncePerRequestFilter.java:76) 에서 org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal (CharacterEncodingFilter.java:88) 에서 doFilter (ApplicationFilterChain.java:210)에서 (ApplicationFilterChain.java : 210) 에서 org.apache.catalina.core.ApplicationFilterChain.doFilter invoke (StandardWrapperValve.java:222) 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 $ AbstractCon nectionHandler.process (AbstractProtocol.java:589) at org.apache.tomcat.util.net.JIoEndpoint $ SocketProcessor.run (JIoEndpoint.java:310) at java.util.concurrent.ThreadPoolExecutor.runWorker (알 수없는 소스) 당신이 있기 때문에 java.lang.Thread.run에서 java.util.concurrent.ThreadPoolExecutor $ Worker.run (알 수없는 소스) (알 수없는 소스)에서

Answer 1

는이 라인

DepartamentServiceImp dades = new DepartamentServiceImp(); 

을 사용할 수 없습니다 @Autowired 주석 상태 변수 DepartamentServiceImp.

봄은 new 키워드의 사용을 권장하지 않습니다. 필요한 모든 인스턴스는 인스턴스화되어 스프링 컨텍스트에서 검색되어야합니다.

DepartamentDAO을 DepartamentServiceImp에 넣고 개체를 직접 인스턴스화하려면 dao를 설정하십시오.