Spring+Hibernate,Autowire sessionFactory 到 hibernate DAO
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【中文标题】Spring+Hibernate,Autowire sessionFactory 到 hibernate DAO【英文标题】:Spring+Hibernate, Autowire sessionFactory into hibernate DAO 【发布时间】:2011-05-06 22:27:39 【问题描述】:我有一个 Hibernate DAO,根据 Hibernate API 3 和 Spring 3.x,我只使用了 sessionFactory
和不是 HibernateDaoSupport
+getHibernateTemplate()
- 我希望这是一个不错的选择... -
现在我的目标是使用注释将sessionFactory
自动连接到我的 DAO 中。
在我的spring.xml
我有这个:
<context:component-scan base-package="data" />
在数据包里面我有我所有的 DAO 和服务类。
这是我的简单HibernateDao
:
@Repository
public class PersonHDAO implements PersonDAO
private SessionFactory sessionFactory;
@Autowired
public void setSessionFactory(SessionFactory sessionFactory)
this.sessionFactory = sessionFactory;
public List<Person> findAll()
return sessionFactory.getCurrentSession().createQuery("bla bla").list();
spring.xml
加载过程中没有错误,但sessionFactory
仍然是null
。
我要做什么?
编辑
这是我在spring.xml
中的sessionFactory
声明:
<?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:context="http://www.springframework.org/schema/context"
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
http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-3.0.xsd">
<bean id="dataSource" class="org.springframework.jdbc.datasource.DriverManagerDataSource">
<!-- <property name="driverClassName" value="org.h2.Driver" /> -->
<property name="url" value="my/db/url" />
<property name="username" value="myUsername" />
<property name="password" value="myPassword" />
</bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
<property name="dataSource" ref="dataSource" />
<property name="packagesToScan" value="data" />
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.H2Dialect</prop>
<prop key="hibernate.current_session_context_class">thread</prop>
<prop key="hibernate.transaction.factory_class">org.hibernate.transaction.JDBCTransactionFactory</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
</bean>
<context:component-scan base-package="data" />
<tx:annotation-driven/>
<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory" />
</bean>
</beans>
EDIT2
现在sessionFactory
不为空,但我有另一种异常:
org.springframework.beans.factory.NoSuchBeanDefinitionException: No unique bean of type [data.PersonHDAO] is defined: expected single bean but found 0:
也许意味着它找不到PersonHDAO
bean?
谢谢大家。
【问题讨论】:
【参考方案1】:你声明了 sessionFactory bean 吗?
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="configLocation">
<value>file:src/hibernate.cfg.xml</value>
</property>
</bean>
【讨论】:
@Maurizio Cucchiara:当然,我编辑了我的第一篇文章并添加了更多信息。 这是一个网络应用程序?您是否在 web.xml 中声明了 org.springframework.web.context.ContextLoaderListener? @Maurizio Cucchiara:不,它是一个桌面应用程序,我没有 web.xml 文件。 您是如何获得 PersonHDAO 实例的?使用 AnnotationConfigApplicationContext? @Maurizio Cucchiara:我只是创建了新的 istance:new PersondHDAO()...这是一个错误吗?我使用以下方法初始化弹簧上下文: ApplicationContext context=new ClassPathXmlApplicationContext(new String[]"spring.xml");【参考方案2】:我认为你的问题是@Autowired
@Autowired private SessionFactory sessionFactory;
【讨论】:
【参考方案3】: @Autowired
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory)
this.sessionFactory = sessionFactory;
【讨论】:
【参考方案4】:你可以创建类
import java.util.Properties;
import javax.sql.DataSource;
import org.apache.commons.dbcp2.BasicDataSource;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.ComponentScan;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.PropertySource;
import org.springframework.core.env.Environment;
import org.springframework.orm.hibernate5.LocalSessionFactoryBean;
import org.springframework.transaction.annotation.EnableTransactionManagement;
@Configuration
@EnableTransactionManagement
@PropertySource("classpath:application.properties")
@ComponentScan("com.your.package")
public class HibernateConfig
private Environment environment;
@Autowired
public void setEnvironment(Environment environment)
this.environment = environment;
@Bean
public LocalSessionFactoryBean sessionFactory()
LocalSessionFactoryBean sessionFactory = new LocalSessionFactoryBean();
sessionFactory.setDataSource(dataSource());
sessionFactory.setPackagesToScan(new String[] "com.your.package" );
sessionFactory.setHibernateProperties(properties());
return sessionFactory;
@Bean
public DataSource dataSource()
BasicDataSource dataSource = new BasicDataSource();
dataSource.setDriverClassName(environment.getRequiredProperty("hibernate.connection.driver_class"));
dataSource.setUrl(environment.getRequiredProperty("hibernate.connection.url"));
dataSource.setUsername(environment.getRequiredProperty("hibernate.connection.username"));
dataSource.setPassword(environment.getRequiredProperty("hibernate.connection.password"));
return dataSource;
private Properties properties()
Properties hibernateProperties = new Properties();
hibernateProperties.setProperty("hibernate.dialect", environment.getRequiredProperty("hibernate.dialect"));
hibernateProperties.setProperty("hibernate.hbm2ddl.auto",
environment.getRequiredProperty("hibernate.hbm2ddl.auto"));
return hibernateProperties;
【讨论】:
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