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[英]Spring Hibernate getCurrentSession() delete not working
[英]Hibernate 4 + Spring + getHibernateTemplate().getSessionFactory().getCurrentSession()
想使用 Spring 自动处理 Hibernate 4 会话我也喜欢扩展 DAO,因为没有为很多实体创建很多 DAO 但是有一个问题:
SessionDAO.java
public abstract class SessionDAO extends HibernateDaoSupport{
public void startSession() {
getSession().beginTransaction();
}
public void closeSession() {
getSession().getTransaction().commit();
}
public void addObject() {
startSession();
getSession().save(this);
closeSession();
}
public Session getSession()
{
return getHibernateTemplate().getSessionFactory().getCurrentSession();
}
}
值.java
@Entity
@Table
public class Values extends SessionDAO {
private int valuesId;
private double amount;
private Date date;
//...getters, setters, etc
}
调度程序-servlet.xml
<bean id="sessionFactory"
class="org.springframework.orm.hibernate4.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="annotatedClasses">
<list>
<value>entity.Crypto</value>
<value>entity.Values</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.Oracle10gDialect</prop>
<prop key="hibernate.show_sql">true</prop>
</props>
</property>
</bean>
<bean id="dataSource"
class="org.apache.tomcat.dbcp.dbcp.BasicDataSource">
<property name="driverClassName" value="oracle.jdbc.OracleDriver" />
<property name="url" value="jdbc:oracle:thin:@my.****.us-east-1.rds.amazonaws.com:1521:ORCL" />
<property name="username" value="****" />
<property name="password" value="****" />
</bean>
<bean id="transactionManager"
class="org.springframework.orm.hibernate4.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
<bean id="persistenceExceptionTranslationPostProcessor"
class="org.springframework.dao.annotation.PersistenceExceptionTranslationPostProcessor"/>
启动服务器时,收到:
INFO: HHH000206: hibernate.properties not found
当尝试加载页面时收到:
SEVERE: Servlet.service() for servlet [dispatcher] in context with path [] threw exception [Request processing failed; nested exception is java.lang.NullPointerException] with root cause
java.lang.NullPointerException
在线的
return getHibernateTemplate().getSessionFactory().getCurrentSession();
怎么了?
不要通过扩展HibernateDaoSupport 来获取会话,只需在DAO 中注入SessionFactory 。
private HibernateTemplate hibernateTemplate;
public void setSessionFactory(SessionFactory sessionFactory) {
this.hibernateTemplate = new HibernateTemplate(sessionFactory);
}
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