applicationContext.xml配置分析

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN 2.0//EN" "http://www.springframework.org/dtd/spring-beans-2.0.dtd">
<beans>

//读取配置文件init.properties的信息
<bean id="placeholderConfig"
class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
<property name="location">
<value>classpath:init.properties</value>
</property>
</bean>
//数据源的配置（使用了上面init.properties的信息） 试用了c3p0连接池
<bean id="dataSource"
class="com.mchange.v2.c3p0.ComboPooledDataSource"
destroy-method="close" dependency-check="none">
<property name="driverClass">
<value>${datasource.driverClassName}</value>
</property>
<property name="jdbcUrl">
<value>${datasource.url}</value>
</property>
<property name="user">
<value>${datasource.username}</value>
</property>
<property name="password">
<value>${datasource.password}</value>
</property>
<property name="acquireIncrement">
<value>${c3p0.acquireIncrement}</value>
</property>
<property name="initialPoolSize">
<value>${c3p0.initialPoolSize}</value>
</property>
<property name="minPoolSize">
<value>${c3p0.minPoolSize}</value>
</property>
<property name="maxPoolSize">
<value>${c3p0.maxPoolSize}</value>
</property>
<property name="maxIdleTime">
<value>${c3p0.maxIdleTime}</value>
</property>
<property name="idleConnectionTestPeriod">
<value>${c3p0.idleConnectionTestPeriod}</value>
</property>
<property name="maxStatements">
<value>${c3p0.maxStatements}</value>
</property>
<property name="numHelperThreads">
<value>${c3p0.numHelperThreads}</value>
</property>
</bean>
//配置spring的heibernate工厂sessionFactory
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">
<ref local="dataSource" />
</property>
配置读取所有数据库表格的配置文件
<property name="mappingResources">
<list>
<value>com/laoer/bbscs/bean/UserInfo.hbm.xml</value>
<value>com/laoer/bbscs/bean/UserDetail.hbm.xml</value>
<value>
com/laoer/bbscs/bean/Config-${datasource.type}.hbm.xml
</value>
<value>
com/laoer/bbscs/bean/Board-${datasource.type}.hbm.xml
</value>
<value>
com/laoer/bbscs/bean/BoardMaster-${datasource.type}.hbm.xml
</value>
<value>com/laoer/bbscs/bean/BoardTag.hbm.xml</value>
<value>com/laoer/bbscs/bean/Permission.hbm.xml</value>
<value>
com/laoer/bbscs/bean/Role-${datasource.type}.hbm.xml
</value>
<value>
com/laoer/bbscs/bean/UserGroup-${datasource.type}.hbm.xml
</value>
<value>com/laoer/bbscs/bean/UserOnline.hbm.xml</value>
<value>com/laoer/bbscs/bean/LoginError.hbm.xml</value>
<value>
com/laoer/bbscs/bean/BoardPermission.hbm.xml
</value>
<value>com/laoer/bbscs/bean/UserLevel.hbm.xml</value>
<value>com/laoer/bbscs/bean/BoardSave.hbm.xml</value>
<value>com/laoer/bbscs/bean/Friend.hbm.xml</value>
<value>
com/laoer/bbscs/bean/Note-${datasource.type}.hbm.xml
</value>
<value>com/laoer/bbscs/bean/BookMark.hbm.xml</value>
<value>
com/laoer/bbscs/bean/ForumMain-${datasource.type}.hbm.xml
</value>
<value>
com/laoer/bbscs/bean/ForumHistory-${datasource.type}.hbm.xml
</value>
<value>com/laoer/bbscs/bean/Subscibe.hbm.xml</value>
<value>com/laoer/bbscs/bean/Vote.hbm.xml</value>
<value>com/laoer/bbscs/bean/VoteItem.hbm.xml</value>
<value>com/laoer/bbscs/bean/VoteUser.hbm.xml</value>
<value>com/laoer/bbscs/bean/AgreeAgainst.hbm.xml</value>
<value>com/laoer/bbscs/bean/Commend.hbm.xml</value>
<value>com/laoer/bbscs/bean/ForumBuy.hbm.xml</value>
<value>
com/laoer/bbscs/bean/BoardAuthUser.hbm.xml
</value>
<value>com/laoer/bbscs/bean/SysNumStat.hbm.xml</value>
<value>com/laoer/bbscs/bean/UserTop.hbm.xml</value>
<value>
com/laoer/bbscs/bean/Elite-${datasource.type}.hbm.xml
</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.dialect">
${hibernate.dialect}
</prop>
<prop key="hibernate.show_sql">
${hibernate.show_sql}
</prop>
<prop key="hibernate.jdbc.fetch_size">
${hibernate.jdbc.fetch_size}
</prop>
<prop key="hibernate.jdbc.batch_size">
${hibernate.jdbc.batch_size}
</prop>
</props>
</property>
</bean>
//配置事务处理
<bean id="myTransactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>
<bean id="messageSource"
class="org.springframework.context.support.ResourceBundleMessageSource">
<property name="basenames">
<list>
<value>com.laoer.bbscs.web.action.BaseAction</value>
</list>
</property>
</bean>
<bean id="sysOptionsValues"
class="com.laoer.bbscs.comm.SysOptionsValues">
<property name="messageSource">
<ref bean="messageSource" />
</property>
</bean>
<bean id="sysConfig"
class="com.laoer.bbscs.service.config.SysConfig">
<constructor-arg>
<ref bean="configService" />
</constructor-arg>
<property name="isLoad">
<value>${bbscs.isloadconfig}</value>
</property>
</bean>
<bean id="userConfig"
class="com.laoer.bbscs.service.config.UserConfig">
<property name="safePath">
<value>${bbscs.safePath}</value>
</property>
</bean>
<bean id="forumConfig"
class="com.laoer.bbscs.service.config.ForumConfig">
<property name="safePath">
<value>${bbscs.safePath}</value>
</property>
</bean>


//boardDAO 是配置的ID
//com.laoer.bbscs.dao.hibernate.BoardHibernateDAO 需要实例化的类

//以后com.laoer.bbscs.dao.hibernate.BoardHibernateDAO这个类在其他类和方法里不用
new BoardHibernateDAO()这样的语句去实例化直接用他刚才定义好的ID名称boardDAO去调用即可。

com.laoer.bbscs.dao.hibernate.BoardHibernateDAO这个类实例化的时候有些方法需要参数，比如说他调用数据库，Hibernian调用数据库时候使用sessionFactory工厂 。

sessionFactory工厂是那里定义的呢 就是上面说的
<bean id="sessionFactory"
class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource">。。。。
这里定义的 所以直接用
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
这种方法传递给com.laoer.bbscs.dao.hibernate.BoardHibernateDAO类


举一个简单的例子例：
BoardHibernateDAO类：

public class BoardHibernateDAO{

这里使用sessionFactory以前的习惯是这样：
先用new去实例化
SessionFactory sessionFactory = new sessionFactory();
在方法里调用

现在的方法是 先定义一个属性 再用get set方法(spring里的说法是依赖注入)来获取刚才配置里的已经实例化好的sessionFactory
private SessionFactory sessionFactory;

public void setSessionFactory(SessionFactory sessionFactory) {
this.sessionFactory = sessionFactory;
}

public SessionFactory getSessionFactory() {
return sessionFactory;
}


}




<bean id="boardDAO"
class="com.laoer.bbscs.dao.hibernate.BoardHibernateDAO">
<property name="sessionFactory">
<ref local="sessionFactory" />
</property>
</bean>


</beans>