Spring HibernateTemplate返回null
嗨!在这里,我尝试在dao层中使用hibernateTemplate,之前我使用sessionfactory进行检索,它工作得很好,但现在我需要实现hibernateTemplate,当我使用hibernateTemplate时,它返回null。这是我的dispatcher-servlet.xml和mydao代码 dispatcher-servlet.xml:Spring HibernateTemplate返回null,spring,hibernate,model-view-controller,Spring,Hibernate,Model View Controller,嗨!在这里,我尝试在dao层中使用hibernateTemplate,之前我使用sessionfactory进行检索,它工作得很好,但现在我需要实现hibernateTemplate,当我使用hibernateTemplate时,它返回null。这是我的dispatcher-servlet.xml和mydao代码 dispatcher-servlet.xml: <?xml version="1.0" encoding="UTF-8"?> <beans xmlns="http
<?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>
net.roseindia.model.Article
net.roseindia.model.User
net.roseindia.model.Register
net.roseindia.model.UserSignup
net.roseindia.model.BusRequest
net.roseindia.model.ApprovedRequests
${hibernate.dial}
${hibernate.show_sql}
我的dao文件是
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);
}
}
package net.roseindia.dao;
导入java.util.List;
导入net.roseindia.model.ApprovedRequests;
导入net.roseindia.model.BusRequest;
导入org.hibernate.SessionFactory;
导入org.springframework.beans.factory.annotation.Autowired;
导入org.springframework.orm.hibernate3.HibernateTemplate;
导入org.springframework.stereotype.Repository;
@存储库(“busRequestDao”)
公共类BusRequestDaoImpl实现BusRequestDao{
@自动连线
私人会话工厂会话工厂;
私有HibernateTemplate HibernateTemplate;
public void setSessionFactory(SessionFactory SessionFactory)
{
this.hibernateTemplate=新的hibernateTemplate(sessionFactory);
}
@凌驾
公共无效添加请求(BusRequest BusRequest){
//TODO自动生成的方法存根
sessionFactory.getCurrentSession().saveOrUpdate(busrequest);
}
@抑制警告(“未选中”)
@凌驾
公共列表listrequests(){
//TODO自动生成的方法存根
return(List)sessionFactory.getCurrentSession().createCriteria(BusRequest.class).List();
}
@抑制警告(“未选中”)
@凌驾
公共列表listApprovedrequests(){
//TODO自动生成的方法存根
//return(List)sessionFactory.getCurrentSession().createCriteria(ApprovedRequests.class).List();
返回hibernateTemplate.find(“来自ApprovedRequests”);
}
@凌驾
公共作废approveRequest(ApprovedRequests ApprovedRequests){
sessionFactory.getCurrentSession().saveOrUpdate(approvedRequests);
}
}
在上面的listApprovedrequests方法的dao文件中,我尝试了hibernateTemplate,但它返回null。我还使用了sessionFactory.getCurrentSession().createCriteria(ApprovedRequests.class).list()
(有评论的一个)工作正常,但无法使用hibernatetemplate不知道我哪里出了问题有人能帮我实现吗 更换
@Autowired
private SessionFactory sessionFactory;
private HibernateTemplate hibernateTemplate;
public void setSessionFactory(SessionFactory sessionFactory)
{
this.hibernateTemplate = new HibernateTemplate(sessionFactory);
}
与
为什么要使用HibernateTemplate?它自己的文档建议不要使用它,并建议直接使用HibernateAPI。对于Hibernate4来说,它已经不存在了。也就是说,HibernateTemplate.find()从不返回null。您的诊断是错误的,其他一些代码正在将它返回的列表转换为null。这是因为您使用了场注入。将
@Autowired
移到setter上,这样您的模板将被初始化。无论如何,如前所述,避免使用HibernateTemplate
@orid:我没有完全明白你的意思,你能详细解释一下如何实现这一点吗。
private SessionFactory sessionFactory;
private HibernateTemplate hibernateTemplate;
@Autowired
public void setSessionFactory(SessionFactory sessionFactory)
{
this.hibernateTemplate = new HibernateTemplate(sessionFactory);
}