疑问:整合默认是采用绑定线程的方式创建session 并且可以不用配置(只能通过getcurrentsession)
关于hibernate的session管理,如果是struts可以使用拦截器对session创建关闭提供一种模式(action的访问前和结束后(这样为了方便获得懒加载数据))
简介:hibernate3.6+spring3.2.5
Spring与Hibernate整合
Spring与Hibernate整合关键点:
1) Hibernate的SessionFactory对象交给Spring创建;
2) hibernate事务交给spring的声明式事务管理。
整合步骤:
1)引入jar包
Hibernate相关jar Spring 核心包(5个) Spring aop 包(4个) orm包(包括:连接池/数据库驱动包/spring-orm-3.2.5.RELEASE.jar【spring对hibernate的支持】/spring-tx-3.2.5.RELEASE.jar【事务相关】)
2)配置(可以将hibernate内容配置到beanxml中整合成一个文件)
hibernate.cfg.xml
bean.xml
实例:(在整合中可以一个个框架测试再整合)
dao:
DeptDao.java(默认session是绑定生命周期是绑定线程的,可以不用配置,可以通过getCurrentSession()获得session)
// 数据访问层 public class DeptDao { // Spring与Hibernate整合: IOC容器注入 private SessionFactory sessionFactory; public void setSessionFactory(SessionFactory sessionFactory) { this.sessionFactory = sessionFactory; } // 保存一个记录 // Spring与Hibernate整合:事务管理交给Spring public void save(Dept dept) { sessionFactory.getCurrentSession().save(dept); }
DeptDao_bak.java(测试hibernate,此例子省略了hibernate的配置)
// 数据访问层 public class DeptDao_bak { private static SessionFactory sessionFactory; static { sessionFactory = new Configuration().configure().buildSessionFactory(); } // 保存一个记录 public void save(Dept dept) { // 创建配置管理类对象、创建SessionFactory、创建Session, 执行操作, 关闭 Session session = sessionFactory.openSession(); session.beginTransaction(); // 保存 session.save(dept); session.getTransaction().commit(); session.close(); }
entity:
Dept.java
public class Dept { private int id; private String name; public int getId() { return id; } public void setId(int id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; }
<?xml version="1.0" encoding="UTF-8" ?> <!DOCTYPE hibernate-mapping PUBLIC "-//Hibernate/Hibernate Mapping DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-mapping-3.0.dtd"> <hibernate-mapping package="cn.itcast.entity"> <class name="Dept" table="t_dept"> <id name="id" column="deptId"> <generator class="native"></generator> </id> <property name="name" column="deptName"></property> </class> </hibernate-mapping>
service:
DeptService.java
// 业务逻辑层 public class DeptService { private DeptDao deptDao; public void setDeptDao(DeptDao deptDao) { this.deptDao = deptDao; } public void save(Dept dept){ deptDao.save(dept); }}
bean.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:p="http://www.springframework.org/schema/p" xmlns:context="http://www.springframework.org/schema/context" xmlns:aop="http://www.springframework.org/schema/aop" xmlns:tx="http://www.springframework.org/schema/tx" xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx.xsd"> <!-- dao 实例 --> <bean id="deptDao" class="cn.itcast.dao.DeptDao"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- service 实例 --> <bean id="deptService" class="cn.itcast.service.DeptService"> <property name="deptDao" ref="deptDao"></property> </bean> <!-- 数据源配置 --> <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource"> <property name="driverClass" value="com.mysql.jdbc.Driver"></property> <property name="jdbcUrl" value="jdbc:mysql:///hib_demo"></property> <property name="user" value="root"></property> <property name="password" value="root"></property> <property name="initialPoolSize" value="3"></property> <property name="maxPoolSize" value="10"></property> <property name="maxStatements" value="100"></property> <property name="acquireIncrement" value="2"></property> </bean> <!-- ###########Spring与Hibernate整合 start########### --> <!-- 方式(1)直接加载hibernate.cfg.xml文件的方式整合 <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml"></property> </bean> --> <!-- 方式(2)连接池交给spring管理 【一部分配置写到hibernate中,一份分在spring中完成】 <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml"></property> <property name="dataSource" ref="dataSource"></property> </bean> --> <!-- 【推荐】方式(3)所有的配置全部都在Spring配置文件中完成 --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <!-- 注入连接池对象 --> <property name="dataSource" ref="dataSource"></property> <!-- hibernate常用配置 --> <property name="hibernateProperties"> <props> <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop> <prop key="hibernate.show_sql">true</prop> <prop key="hibernate.hbm2ddl.auto">update</prop> </props> </property> <!-- hibernate映射配置 <property name="mappingLocations"> <list> <value>classpath:cn/itcast/entity/*.hbm.xml</value> </list> </property> --> <property name="mappingDirectoryLocations"> <list> <value>classpath:cn/itcast/entity/</value> </list> </property> </bean> <!-- ###########Spring与Hibernate整合 end########### --> <!-- 事务配置 --> <!-- a. 配置事务管理器类 --> <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> <!-- b. 配置事务增强(拦截到方法后如果管理事务?) --> <tx:advice id="txAdvice" transaction-manager="txManager"> <tx:attributes> <tx:method name="*" read-only="false"/> </tx:attributes> </tx:advice> <!-- c. Aop配置 --> <aop:config> <aop:pointcut expression="execution(* cn.itcast.service.*.*(..))" id="pt"/> <aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/> </aop:config> </beans>
测试类:
// 容器 private ApplicationContext ac = new ClassPathXmlApplicationContext("bean.xml"); @Test public void testApp() throws Exception { DeptService deptServie = (DeptService) ac.getBean("deptService"); System.out.println(deptServie.getClass()); deptServie.save(new Dept()); }