SSH学习记要(6)-整合Hibernate

SSH学习记录(6)-整合Hibernate
Spring 中整合Hibernate

1. Spring中加入一个DataSource和一个SessionFactory，搞定。

	<!-- dbcpDataSource ========================================================================== -->

	<bean id="dbcpDataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">

		<property name="driverClassName" value="com.mysql.jdbc.Driver"/>

		<property name="url" value="jdbc:mysql://localhost:3306/test"/>

		<property name="username" value="root"/>

		<property name="password" value="123456"/>

		<property name="maxActive" value="1000"/>

		<property name="maxIdle" value="5000"/>

		<property name="minIdle" value="5"/>

		<property name="removeAbandoned" value="true"/>

		<property name="removeAbandonedTimeout" value="180"/>

		<property name="maxWait" value="9000"/>

	</bean>



	<!-- sessionFactory ================================================================== -->

	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

		<property name="dataSource" ref="dbcpDataSource"/>

		<property name="hibernateProperties">

			<props>

				<prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>

		        <prop key="hibernate.show_sql">true</prop>

			</props>

		</property>

	</bean>

2. 现在还没用上，在Logic中加一个SessionFactory的变量和get,set方法。在spring中配置。

package com.zhch.logic;



import org.hibernate.HibernateException;

import org.hibernate.Session;

import org.hibernate.SessionFactory;

import org.hibernate.Transaction;



import com.learn.hibernate.dto.Student;



public class AOPLogicImpl implements AOPLogic{

	private SessionFactory sessionFactory;

	public String getWord(){

		return "I am aopLogicImpl.";

	}

	public void print(){

		System.out.println("aopLogicImpl print");

	}

	public void saveStudent(){

		try {

			Session session = sessionFactory.openSession();

			Transaction tx = session.beginTransaction();

			for (int i = 0; i < 20; i++) {

				Student customer = new Student();

				customer.setAge(20);

				customer.setName("Li2");

				customer.set_class("three");

				session.save(customer);

			}

			tx.commit();

			session.close();

		} catch (HibernateException e) {

			e.printStackTrace();

		}

	}

	/**

	 * @return the sessionFactory

	 */

	public SessionFactory getSessionFactory() {

		return sessionFactory;

	}

	/**

	 * @param sessionFactory the sessionFactory to set

	 */

	public void setSessionFactory(SessionFactory sessionFactory) {

		this.sessionFactory = sessionFactory;

	}

}

	<!-- hbAction -->

    <bean id="hbAction" class="com.zhch.action.AOPAction">

    	<property name="logic" ref="hbService"/>

    </bean>

    <bean id="hbService" class="com.zhch.logic.AOPLogicImpl">

    	<property name="sessionFactory" ref="sessionFactory"/>

    </bean>

3. Student类和相应的映射文件Student.hbm.xml.(同５中的一样)

4. 在bean sessionFactory中配置对映射文件的引用。

	<!-- sessionFactory ================================================================== -->

	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

		<!-- 其它的内容　

		-->

		<property name="mappingResources">

			<list>

				<value>com/zhch/db/dto/Student.hbm.xml</value>

			</list>

		</property>

	</bean>

5. 在Action中添加个hbTest方法调用logic的saveStudent方法，在页面添加个提交到Action的hbTest方法的按钮，测试一下，成功。





附加1:

可以将数据库的相关信息放到一个database.properties文件中统一管理，在spring中引用这个文件。方便数据库切换。

database.properties内容：

database.connection.driver_class=com.mysql.jdbc.Driver

database.connection.url=jdbc:mysql://localhost:3306/test

database.connection.username=root

database.connection.password=123456

database.connection.dialect=org.hibernate.dialect.MySQLDialect

spring中加入：

	<!-- propertyConfigurer ================================================================ -->

	<bean id="propertyConfigurer"

		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">

		<property name="locations">

			<list>

				<value>/WEB-INF/database.properties</value>

			</list>

		</property>

	</bean>

引用方法：

		<property name="driverClassName" value="${database.connection.driver_class}"/>

		<property name="url" value="${database.connection.url}"/>

		<property name="username" value="${database.connection.username}"/>

附加2: 一个典型的事务AOP的配置，以后用到

	<bean id="transactionManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">  

		<property name="sessionFactory">  

			<ref local="sessionFactory"/>  

		</property>  

	</bean>  

	 

	<bean id="baseServiceproxyBean" 

		class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean" lazy-init="true">  

		<property name="transactionManager">  

			<ref local="transactionManager"/>  

		</property>  

		<property name="transactionAttributes">  

			<props>  

				<prop key="find*">PROPAGATION_REQUIRED,readOnly</prop>  

				<prop key="update*">PROPAGATION_REQUIRED</prop>  

				<prop key="delete*">PROPAGATION_REQUIRED</prop>  

				<prop key="save*">PROPAGATION_REQUIRED</prop>  

				<prop key="InitModePopedomInfo">PROPAGATION_REQUIRED</prop>  

				<prop key="get*">PROPAGATION_REQUIRED,readOnly</prop>  

			</props>  

		</property>  

	</bean>	

spring 的注解sessionFactory

	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.annotation.AnnotationSessionFactoryBean">
		<property name="dataSource" ref="dataSource"/>
		<!--<property name="mappingLocations" value="classpath*:com/creawor/demo/model/*.hbm.xml"/>-->
		
		<!-- packagesToScan可以自动搜索某个package的全部标记@Entity class -->
		<property name="packagesToScan">
			<list>
				<value>com.**.model</value>
			</list>
		</property>
		<property name="hibernateProperties">
			<props>
				<!--常用数据库方言 MySQL5Dialect,SQLServerDialect,OracleDialect,SybaseDialect,DB2Dialect -->
				<prop key="hibernate.dialect">org.hibernate.dialect.OracleDialect</prop>
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.query.substitutions">true 1, false 0</prop>
				<prop key="hibernate.default_batch_fetch_size">4</prop>
			</props>
		</property>
	</bean>

附加3：

当 Hibernate 遇上 Spring　　http://www.ibm.com/developerworks/cn/java/wa-spring2/