null을 반환하는 HibernateTemplate

Question

안녕하세요! 여기에 DAO 레이어에서 hibernateTemplate을 사용하려고합니다. 이전에 세션 팩토리를 가져 오는 작업을했는데 잘 작동했지만 이제는 hibernateTemplate을 구현해야합니다. hibernateTemplate을 사용할 때 null을 반환합니다. 여기에 dispatcher-servlet.xml 및 mydao 코드가 있습니다.

디스패처-servlet.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:tx="http://www.springframework.org/schema/tx" 
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 
         http://www.springframework.org/schema/tx 
         http://www.springframework.org/schema/tx/spring-tx-3.0.xsd"> 

<context:property-placeholder location="classpath:jdbc.properties" /> 
<context:component-scan base-package="net.roseindia" /> 

<tx:annotation-driven transaction-manager="hibernateTransactionManager"/> 

<bean id="jspViewResolver" 
    class="org.springframework.web.servlet.view.InternalResourceViewResolver"> 
    <property name="viewClass" 
     value="org.springframework.web.servlet.view.JstlView" /> 
    <property name="prefix" value="/WEB-INF/view/" /> 
    <property name="suffix" value=".jsp" /> 
</bean> 

<bean id="dataSource" 
    class="org.springframework.jdbc.datasource.DriverManagerDataSource"> 
    <property name="driverClassName" value="${database.driver}" /> 
    <property name="url" value="${database.url}" /> 
    <property name="username" value="${database.user}" /> 
    <property name="password" value="${database.password}" /> 
</bean> 

<bean id="sessionFactory" 
    class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean"> 
    <property name="dataSource" ref="dataSource" /> 
    <property name="annotatedClasses"> 
     <list> 
      <value>net.roseindia.model.Article</value> 
      <value>net.roseindia.model.User</value> 
      <value>net.roseindia.model.Register</value> 
      <value>net.roseindia.model.UserSignup</value> 
      <value>net.roseindia.model.BusRequest</value> 
      <value>net.roseindia.model.ApprovedRequests</value> 
     </list> 
    </property> 
    <property name="hibernateProperties"> 
     <props> 
      <prop key="hibernate.dialect">${hibernate.dialect}</prop> 
      <prop key="hibernate.show_sql">${hibernate.show_sql}</prop>    
     </props> 
    </property> 
</bean> 

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

내 DAO 파일은 내가 HibernateTemplate에 시도 listApprovedrequests 방법에 대해 위의 DAO 파일에서

package net.roseindia.dao; 

import java.util.List; 

import net.roseindia.model.ApprovedRequests; 
import net.roseindia.model.BusRequest; 

import org.hibernate.SessionFactory; 
import org.springframework.beans.factory.annotation.Autowired; 
import org.springframework.orm.hibernate3.HibernateTemplate; 
import org.springframework.stereotype.Repository; 

@Repository("busRequestDao") 
public class BusRequestDaoImpl implements BusRequestDao { 

    @Autowired 
    private SessionFactory sessionFactory; 

    private HibernateTemplate hibernateTemplate; 

    public void setSessionFactory(SessionFactory sessionFactory) 
    { 
     this.hibernateTemplate = new HibernateTemplate(sessionFactory); 
    } 

    @Override 
    public void addRequest(BusRequest busrequest) { 
     // TODO Auto-generated method stub 
     sessionFactory.getCurrentSession().saveOrUpdate(busrequest); 

    } 

    @SuppressWarnings("unchecked") 
    @Override 
    public List<BusRequest> listrequests() { 
     // TODO Auto-generated method stub 
     return (List<BusRequest>) sessionFactory.getCurrentSession().createCriteria(BusRequest.class).list(); 
    } 

    @SuppressWarnings("unchecked") 
    @Override 
    public List<ApprovedRequests> listApprovedrequests() { 
     // TODO Auto-generated method stub 
    // return (List<ApprovedRequests>) sessionFactory.getCurrentSession().createCriteria(ApprovedRequests.class).list(); 
     return hibernateTemplate.find("from ApprovedRequests"); 
    } 


    @Override 
    public void approveRequest(ApprovedRequests approvedRequests) { 
     sessionFactory.getCurrentSession().saveOrUpdate(approvedRequests); 
    } 

} 

이지만 null을 반환합니다. 나는 또한 sessionFactory.getCurrentSession().createCriteria(ApprovedRequests.class).list() (주석이 달린)을 사용했지만 잘 작동하지만 hibernatetemplate을 사용할 수 없다면 어디서 잘못 될지 알 수있다.

Answer 1

는 교체

private SessionFactory sessionFactory; 

private HibernateTemplate hibernateTemplate; 

@Autowired 
public void setSessionFactory(SessionFactory sessionFactory) 
{ 
    this.hibernateTemplate = new HibernateTemplate(sessionFactory); 
}