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Spring和Hibernate整合的关键是：Hibernate的SessionFactory由Spring的IOC容器来创建、Hibernate的事务由Spring的AOP来进行管理。 注意：由于进行整合，Hibernate的配置文件(hibernate.cfg.xml)中的配置，可以全部写到Spring的配置文件当中，因此可以删除hibernate.cfg.xml文件。
| Hibernate | 整合前 | 整合后 |
| SessionFactory | 由开发者创建 | 由Spring IOC容器创建 |
| Transaction | 由开发者维护（细粒度事务） | 由Spring AOP实现动态注入（粗粒度事务） |
(1)添加jar包
(2)将hibernate配置转移到Spring的配置当中
(3)dao层和service层代码准备
(4)将dao层和service层的类注入到Spring的配置当中
(5)测试
1、添加jar包
添加spring-aop、spring-jdbc、spring-orm相关jar包
spring-aop相关jar包 aopalliance-.jar aspectjrt.jar aspectjweaver.jar spring-aop-3.2.5.RELEASE.jar |
spring-jdbc相关jar包 spring-jdbc-3.2.5.RELEASE.jar spring-tx-3.2.5.RELEASE.jar |
spring-orm相关jar包 spring-orm-3.2.5.RELEASE.jar |
2、将hibernate配置转移到Spring的配置当中
2.1、删除hibernate.cfg.xml文件
只要删除hibernate.cfg.xml文件即可
2.2、添加bean-base.xml文件
这里面主要保存了原来hibernate.cfg.xml中的配置，主要包括以下三方面内容：数据库连接信息、Hibernate的SessionFactory对象的创建和配置、Hibernate的事务管理。
<?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:tx="http://www.springframework.org/schema/tx"
xmlns:aop="http://www.springframework.org/schema/aop"
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/tx
http://www.springframework.org/schema/tx/spring-tx.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop.xsd">
<!-- 导入外部的properties配置文件 -->
<context:property-placeholder location="classpath:db.properties" />
<!-- 配置c3p0数据源 -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="${driverClass}"></property>
<property name="jdbcUrl" value="${jdbcUrl}"></property>
<property name="user" value="${user}"></property>
<property name="password" value="${password}"></property>
<!--初始化时获取三个连接，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
<property name="initialPoolSize" value="${initialPoolSize}"></property>
<!--连接池中保留的最小连接数。Default: 3 -->
<property name="minPoolSize" value="${minPoolSize}"></property>
<!--连接池中保留的最大连接数。Default: 15 -->
<property name="maxPoolSize" value="${maxPoolSize}"></property>
<!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
<property name="acquireIncrement" value="${acquireIncrement}"></property>
<!--最大空闲时间，1800秒内未使用则连接被丢弃，若为0则永不丢弃。Default: 0 -->
<property name="maxIdleTime" value="${maxIdleTime}"></property>
</bean>
<!--
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<property name="driverClass" value="com.mysql.jdbc.Driver"></property>
<property name="jdbcUrl" value="jdbc:mysql://127.0.0.1:3306/tax_sys"></property>
<property name="user" value="root"></property>
<property name="password" value="root"></property>
<property name="initialPoolSize" value="3"></property>
<property name="minPoolSize" value="3"></property>
<property name="maxPoolSize" value="15"></property>
<property name="acquireIncrement" value="3"></property>
<property name="maxIdleTime" value="1800"></property>
</bean>
-->
<!-- SessionFactory -->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"></property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql">true</prop>
<prop key="hibernate.format_sql">false</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<property name="mappingLocations">
<list>
<value>classpath:com/rk/*/entity/*.hbm.xml</value>
</list>
</property>
</bean>
<!-- 事务管理 -->
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"></property>
</bean>
<!-- 事务通知 -->
<tx:advice id="txAdvice" transaction-manager="txManager">
<tx:attributes>
<tx:method name="find*" read-only="true"/>
<tx:method name="get*" read-only="true"/>
<tx:method name="load*" read-only="true"/>
<tx:method name="search*" read-only="true"/>
<tx:method name="list*" read-only="true"/>
<tx:method name="*" read-only="false" rollback-for="Throwable"/>
</tx:attributes>
</tx:advice>
<!-- 利用aop植入事务 -->
<aop:config>
<aop:pointcut id="pt" expression="bean(*Service)"/>
<!-- <aop:pointcut id="pt" expression="execution(* com.rk.test.service.impl.*.*(..))"/> -->
<aop:advisor advice-ref="txAdvice" pointcut-ref="pt"/>
</aop:config>
</beans>在上述配置当中，我们有两处优化的地方：
(1)将数据库的配置参数放置到一个db.properties文件中保存
driverClass=com.mysql.jdbc.Driver jdbcUrl=jdbc:mysql://127.0.0.1:3306/tax_sys?useUnicode=true&characterEncoding=utf8 user=root password=root initialPoolSize=4 minPoolSize=2 maxPoolSize=12 acquireIncrement=2 maxIdleTime=1800
同时，注意bean-base.xml文件中这一配置
<!-- 导入外部的properties配置文件 --> <context:property-placeholder location="classpath:db.properties" />
(2)应用事务时，切入点表达式的改进
原来
<aop:pointcut id="pt" expression="execution(* com.rk.test.service.impl.*.*(..))"/>
转变后
<aop:pointcut id="pt" expression="bean(*Service)"/>
2.3、将bean-base.xml文件引入到applicationContext.xml文件中
<?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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <import resource="classpath:bean-base.xml"/> </beans>
重点是下面这一句
<import resource="classpath:bean-base.xml"/>
3、dao层和service层代码准备
PersonDao.java
package com.rk.test.dao;
import java.io.Serializable;
import com.rk.test.entity.Person;
public interface PersonDao {
Person findById(Serializable id);
void save(Person p);
}PersonDaoImpl.java
package com.rk.test.dao.impl;
import java.io.Serializable;
import org.hibernate.Session;
import org.hibernate.SessionFactory;
import com.rk.test.dao.PersonDao;
import com.rk.test.entity.Person;
public class PersonDaoImpl implements PersonDao {
private SessionFactory sessionFactory;
public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}
public Person findById(Serializable id) {
Session session = sessionFactory.getCurrentSession();
Person p = (Person) session.get(Person.class, id);
return p;
}
public void save(Person p) {
Session session = sessionFactory.getCurrentSession();
session.save(p);
}
}PersonService.java
package com.rk.test.service;
import java.io.Serializable;
import com.rk.test.entity.Person;
public interface PersonService {
Person findById(Serializable id);
void save(Person p);
}PersonServiceImpl.java
package com.rk.test.service.impl;
import java.io.Serializable;
import com.rk.test.dao.PersonDao;
import com.rk.test.entity.Person;
import com.rk.test.service.PersonService;
public class PersonServiceImpl implements PersonService {
private PersonDao personDao;
public void setPersonDao(PersonDao personDao) {
this.personDao = personDao;
}
public Person findById(Serializable id) {
// Person p = new Person();
// p.setpName("小红");
// personDao.save(p);
return personDao.findById(id);
}
public void save(Person p) {
personDao.save(p);
// int i = 1/ 0;
}
}4、将dao层和service层的类注入到Spring的配置当中
bean-dao.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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <bean id="personDao" class="com.rk.test.dao.impl.PersonDaoImpl"> <property name="sessionFactory" ref="sessionFactory"></property> </bean> </beans>
bean-service.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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <bean id="personService" class="com.rk.test.service.impl.PersonServiceImpl"> <property name="personDao" ref="personDao"></property> </bean> </beans>
applicationContext.xml引入 bean-dao.xml、bean-service.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:tx="http://www.springframework.org/schema/tx" xmlns:aop="http://www.springframework.org/schema/aop" 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/tx http://www.springframework.org/schema/tx/spring-tx.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop.xsd"> <import resource="classpath:bean-base.xml"/> <import resource="classpath:com/rk/*/config/bean-*.xml"/> </beans>
重点是下面这一句
<import resource="classpath:com/rk/*/config/bean-*.xml"/>
5、测试
测试分为两方面：
(1)普通测试：能够读取一条数据、能够保存一条数据
(2)事务测试：只读事务中不能存储数据、事务出现异常要进行回滚
package com.rk.test;
import org.junit.Before;
import org.junit.Test;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;
import com.rk.test.entity.Person;
import com.rk.test.service.PersonService;
public class TestMerge {
private ApplicationContext ac;
@Before
public void init()
{
ac = new ClassPathXmlApplicationContext("applicationContext.xml");
}
@Test
public void testFindById()
{
PersonService personService = (PersonService) ac.getBean("personService");
Person p = personService.findById("4028d081564ac44401564ac4478b0000");
System.out.println(p);
}
@Test
public void testSave()
{
PersonService personService = (PersonService) ac.getBean("personService");
Person p = new Person();
p.setpName("Lucy");
personService.save(p);
}
@Test
public void testTransactionReadOnly()//只读事务，如果在只读事务中出现更新操作则回滚
{
PersonService personService = (PersonService) ac.getBean("personService");
Person p = personService.findById("4028d081564ac44401564ac4478b0000");
System.out.println(p);
}
@Test
public void testTransactionRollback()//回滚事务，如果操作中出现有任务异常则回滚先前的操作
{
PersonService personService = (PersonService) ac.getBean("personService");
Person p = new Person();
p.setpName("Lily");
personService.save(p);
}
}标签：ssh
原文地址：http://lsieun.blog.51cto.com/9210464/1834695
