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Spring与Struts2整合的目的：
让Spring管理Action
Spring整合Hinernate的目的：
--管理SessionFactory(单例的)
--声明式事务管理
1.首先建一个java项目接可以了
单独加Hibernate的开发环境：jar包和配置文件(hibernate.cfg.xml和xxx.hbm.xml)
hibernate.cfg.xml里面包含三类信息：数据库连接信息，其他信息，映射信息(这是未整合时的情况)
public class User { private Integer id; private String name; private Integer age; public User() { } public User(Integer id, String name, Integer age) { this.id = id; this.name = name; this.age = age; } public Integer getId() { return id; } public void setId(Integer id) { this.id = id; } public String getName() { return name; } public void setName(String name) { this.name = name; } public Integer getAge() { return age; } public void setAge(Integer age) { this.age = age; } }
User.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="com.winner.entity"> <class name="User" table="t_user"> <id name="id"> <generator class="native"/> </id> <property name="name"/> <property name="age"/> </class> </hibernate-mapping>
hibernate.cfg.xml
<!DOCTYPE hibernate-configuration PUBLIC "-//Hibernate/Hibernate Configuration DTD 3.0//EN" "http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd"> <hibernate-configuration> <session-factory> <!-- 1，数据库连接信息 --> <property name="dialect">org.hibernate.dialect.MySQL5InnoDBDialect</property> <property name="connection.url">jdbc:mysql:///sh</property> <property name="connection.driver_class">com.mysql.jdbc.Driver</property> <property name="connection.username">root</property> <property name="connection.password">root</property> <!-- 2，其他配置 --> <property name="hibernate.show_sql">true</property> <property name="hbm2ddl.auto">update</property> <!-- 3，导入映射配置 --> <mapping resource="com/winner/entity/User.hbm.xml"/> </session-factory> </hibernate-configuration>
单独加Spring的开发环境:jar包和配置文件applicationContext.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: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-2.5.xsd http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-2.5.xsd http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-2.5.xsd http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-2.5.xsd "> </beans>
下面开始整合，
让Spring容器管理SessionFactory.
方法一：不建议，应该使用专业 的数据库连接池
<!-- 配置SessionFactory，方式一：指定hibernate主配置文件的路径 --> <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean"> <property name="configLocation" value="classpath:hibernate.cfg.xml"/> </bean>
方法二：建议，这种情况下不需要hibernate.cfg.xml文件了
数据源里面没有方言，需要在hibernateProperties里面配
<?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: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-2.5.xsd
http://www.springframework.org/schema/context
http://www.springframework.org/schema/context/spring-context-2.5.xsd
http://www.springframework.org/schema/tx
http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
http://www.springframework.org/schema/aop
http://www.springframework.org/schema/aop/spring-aop-2.5.xsd ">
<!-- 加载外部的配置文件 -->
<context:property-placeholder location="classpath:jdbc.properties"/>
<!-- 配置数据库连接池 ComboPooledDataSource -->
<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
<!-- 基本的连接信息 -->
<property name="jdbcUrl" value="${jdbcUrl}"/>
<property name="driverClass" value="${driverClass}"/>
<property name="user" value="${username}"/>
<property name="password" value="${password}"/>
<!-- 一些管理的配置 -->
<property name="initialPoolSize" value="3"></property>
<property name="minPoolSize" value="3"></property>
<property name="maxPoolSize" value="5"></property>
<property name="acquireIncrement" value="3"></property>
<property name="maxIdleTime" value="1800"></property>
</bean>
<!-- 配置SessionFactory，不使用Hibernate主配置文件，在这里写所有的Hibernate配置，这样就不需要hibernate的配置文件了-->
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<!--hibernate的数据库连接信息-->
<property name="dataSource" ref="dataSource"/>
<!--hibernate其他配置-->
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">org.hibernate.dialect.MySQL5Dialect</prop>
<prop key="hibernate.show_sql" >true</prop>
<prop key="hibernate.hbm2ddl.auto">update</prop>
</props>
</property>
<!--映射配置-->
<property name="mappingLocations">
<list>
<!--可以有多个-->
<value>classpath:com/winner/entity/User.hbm.xml</value>
</list>
</property>
</bean>
</beans>
测试
public class SpringTest {
private ApplicationContext ac = new ClassPathXmlApplicationContext("applicationContext.xml");
@Test
public void testSessionFactory() {
SessionFactory sessionFactory = (SessionFactory) ac.getBean("sessionFactory");
System.out.println(sessionFactory);
}
}
配置声明式事务管理
<!-- 二、配置声明式事务管理，采用基于注解的方式 --> <bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"> <!--管理事务肯定离不开session，进而需要sessionFactory--> <property name="sessionFactory" ref="sessionFactory"/> </bean> <tx:annotation-driven transaction-manager="transactionManager"/>
测试事务是否起作用
--能不能正常提交
@Service public class UserService { @Resource private SessionFactory sessionFactory; @Transactional public void saveTwoUsers() { Session session = sessionFactory.getCurrentSession(); session.save(new User()); session.save(new User()); } }
// 测试事务 @Test public void testTransaction() throws Exception { UserService userService = (UserService) ac.getBean("userService"); userService.saveTwoUsers(); }
Hibernate: insert into t_user (name, age) values (?, ?)
Hibernate: insert into t_user (name, age) values (?, ?)
--有异常能不能回滚
@Service public class UserService { @Resource private SessionFactory sessionFactory; @Transactional public void saveTwoUsers() { Session session = sessionFactory.getCurrentSession(); session.save(new User()); int i = 1 / 0; session.save(new User()); } }
Hibernate: insert into t_user (name, age) values (?, ?)
java.lang.ArithmeticException: / by zero
将异常语句去掉，在执行一次
看数据库
第三条被回滚掉了。
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原文地址：http://www.cnblogs.com/winner-0715/p/5425563.html
