Spring持久层(三) Hibernate

1 先定义配置文件hibernate-context.xml

<?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:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd"><bean id="placeholderConfig"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="location"><value>classpath:db.properties</value></property></bean><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close"><property name="driverClassName" value="${db.driverClassName}" /><property name="url" value="${db.url}NIHAO" /><property name="username" value="${db.username}" /><property name="password" value="${db.password}" /><property name="initialSize" value="2" /><property name="maxActive" value="20" /><property name="maxWait" value="-1" /><property name="maxIdle" value="10" /><property name="removeAbandoned" value="true" /><property name="removeAbandonedTimeout" value="30000" /><property name="logAbandoned" value="true" /></bean><bean id="sessionFactory"class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="dataSource"><ref bean="dataSource" /></property><property name="mappingResources"><list><value>springapp/domain/Product.hbm.xml</value></list></property><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop><prop key="hibernate.show_sql">true</prop></props></property></bean><!--transactionManager--><bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory"><ref local="sessionFactory" /></property></bean><bean id="transactionInterceptor"class="org.springframework.transaction.interceptor.TransactionInterceptor"><property name="transactionManager" ref="transactionManager" /><property name="transactionAttributeSource" ref="txAttributeSource" /></bean><bean id="txAttributeSource"class="org.springframework.transaction.interceptor.NameMatchTransactionAttributeSource"><property name="properties"><props><prop key="save*">PROPAGATION_REQUIRED</prop></props></property></bean><beanclass="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"><property name="beanNames"><list><value>*Dao</value></list></property><property name="interceptorNames"><list><value>transactionInterceptor</value></list></property></bean><bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate"><property name="dataSource" ref="dataSource"></property></bean><bean id="productDao" class="springapp.repository.HibernateProductDao"><property name="sessionFactory" ref="sessionFactory"></property></bean></beans>

 

2 HibernateProductDao.java源代码

public class HibernateProductDao implements ProductDao {private SessionFactory sessionFactory;public void setSessionFactory(SessionFactory sessionFactory) {this.sessionFactory = sessionFactory;}@Overridepublic List<Product> getProductList() {return null;}@Overridepublic void saveProduct(Product prod) {sessionFactory.getCurrentSession().saveOrUpdate(prod);}}

 

3 Product.hbm.xml

 

<?xml version="1.0"?><!DOCTYPE hibernate-mapping PUBLIC"-//Hibernate/Hibernate Mapping DTD 3.0//EN""http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd"><hibernate-mapping package="springapp.domain"><class name="Product" table="PRODUCTS" select-before-update="false"dynamic-update="false" dynamic-insert="false" optimistic-lock="version"><id name="id" column="Id" type="java.lang.Integer" length="19"><generator class="assigned"></generator></id><property name="price" type="java.lang.Double" update="true"insert="true" access="property" column="PRICE" length="10" not-null="false" /><property name="description" type="java.lang.String" update="true"insert="true" access="property" column="DESCRIPTION" length="50"not-null="false" /></class></hibernate-mapping>

 

 

4  测试代码实验了保存实体的例子

public class HibernateProductDaoTest {static ApplicationContext ctx = new ClassPathXmlApplicationContext(new String[] { "file:src/hibernate-context.xml" });public static void main(String[] args) {ProductDao dao = (ProductDao) ctx.getBean("productDao");Product product = new Product();product.setId(2);product.setPrice(12.2);product.setDescription("description1");dao.saveProduct(product);}}

 

5 如果不配置事务，则会抛出异常：

Exception in thread "main" org.hibernate.HibernateException: No Hibernate Session bound to thread, and configuration does not allow creation of non-transactional one here
 at org.springframework.orm.hibernate3.SpringSessionContext.currentSession(SpringSessionContext.java:63)
 at org.hibernate.impl.SessionFactoryImpl.getCurrentSession(SessionFactoryImpl.java:574)
 at springapp.repository.HibernateProductDao.saveProduct(HibernateProductDao.java:24)
 at springapp.repository.HibernateProductDaoTest.main(HibernateProductDaoTest.java:19)

 

 

6 使用HibrenateTemplate

 

HibrenateTemplateDao.java

public class HibernateTemplateProductDao implements ProductDao {private HibernateTemplate hibernateTemplate;public void setHibernateTemplate(HibernateTemplate hibernateTemplate) {this.hibernateTemplate = hibernateTemplate;}@Overridepublic List<Product> getProductList() {List result = hibernateTemplate.find("from Product " + "where id = ? ",new Object[] { 1 });return result;}@Overridepublic void saveProduct(Product prod) {}}

 

7 配置文件

<?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:aop="http://www.springframework.org/schema/aop"xmlns:tx="http://www.springframework.org/schema/tx"xsi:schemaLocation="http://www.springframework.org/schema/beanshttp://www.springframework.org/schema/beans/spring-beans-2.0.xsdhttp://www.springframework.org/schema/aophttp://www.springframework.org/schema/aop/spring-aop-2.0.xsdhttp://www.springframework.org/schema/txhttp://www.springframework.org/schema/tx/spring-tx-2.0.xsd"><bean id="placeholderConfig"class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer"><property name="location"><value>classpath:db.properties</value></property></bean><bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource"destroy-method="close"><property name="driverClassName" value="${db.driverClassName}" /><property name="url" value="${db.url}NIHAO" /><property name="username" value="${db.username}" /><property name="password" value="${db.password}" /><property name="initialSize" value="2" /><property name="maxActive" value="20" /><property name="maxWait" value="-1" /><property name="maxIdle" value="10" /><property name="removeAbandoned" value="true" /><property name="removeAbandonedTimeout" value="30000" /><property name="logAbandoned" value="true" /></bean><bean id="sessionFactory"class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"><property name="dataSource"><ref bean="dataSource" /></property><property name="mappingResources"><list><value>springapp/domain/Product.hbm.xml</value></list></property><property name="hibernateProperties"><props><prop key="hibernate.dialect">org.hibernate.dialect.SQLServerDialect</prop><prop key="hibernate.show_sql">true</prop></props></property></bean><!--transactionManager--><bean id="transactionManager"class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory"><ref local="sessionFactory" /></property></bean><bean id="transactionInterceptor"class="org.springframework.transaction.interceptor.TransactionInterceptor"><property name="transactionManager" ref="transactionManager" /><property name="transactionAttributeSource" ref="txAttributeSource" /></bean><bean id="txAttributeSource"class="org.springframework.transaction.interceptor.NameMatchTransactionAttributeSource"><property name="properties"><props><prop key="save*">PROPAGATION_REQUIRED</prop><prop key="get*">PROPAGATION_REQUIRED</prop></props></property></bean><beanclass="org.springframework.aop.framework.autoproxy.BeanNameAutoProxyCreator"><property name="beanNames"><list><value>*Dao</value></list></property><property name="interceptorNames"><list><value>transactionInterceptor</value></list></property></bean><bean id="productDao" class="springapp.repository.HibernateProductDao"><property name="sessionFactory" ref="sessionFactory"></property></bean><bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate"><property name="sessionFactory" ref="sessionFactory"></property></bean><bean id="hibernateTemplateProductDao" class="springapp.repository.HibernateTemplateProductDao"><property name="hibernateTemplate" ref="hibernateTemplate"></property></bean></beans>

 

8 测试代码

public class HibernateTemplateProductDaoTest {static ApplicationContext ctx = new ClassPathXmlApplicationContext(new String[] { "file:src/hibernate-context.xml" });public static void main(String[] args) {ProductDao dao = (ProductDao) ctx.getBean("hibernateTemplateProductDao");Product product = new Product();product.setId(2);product.setPrice(12.2);product.setDescription("description1");dao.saveProduct(product);List<Product> list = dao.getProductList();for (Product p : list) {System.out.println(p.getDescription());}}}