Spring容器启动配置

什么时候spring容器启动?其实就是程序中执行加载 web.xml配置文件的时候。

Spring可以通过（Servlet）org.springframework.web.context.ContextLoaderServlet和Listener（org.springframework.web.context.ContextLoaderListener）两个类作为Spring启动的入口。

1.应用程序下加载

ApplicationContext context = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext.xml");

applicationContext.xml内容如下：

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

<beans>
<!-- dataSource config -->
<bean id ="dataSource" 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/game" />
<property name="username" value="root" />
<property name="password" value="root"/>
</bean>

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

<property name="dataSource">
<ref bean="dataSource"/>
</property>
<property name="configLocation">
<value>classpath:com\sterning\bean\hibernate\hibernate.cfg.xml</value>
</property>
</bean>

<!-- TransactionManager 不过这里暂时没注入-->
<bean id="transactionManager"
class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory">
<ref local="sessionFactory"/>
</property>
</bean>

<!-- DAO -->
<bean id="booksDao" class="com.sterning.books.dao.hibernate.BooksMapDao">
<property name="sessionFactory">
<ref bean="sessionFactory"/>
</property>
</bean>

<!-- Services -->
<bean id="booksService" class="com.sterning.books.services.BooksService">
<property name="booksDao">
<ref bean="booksDao"/>
</property>
</bean>

<bean id="pagerService" class="com.sterning.commons.PagerService"/>

<!-- view -->
<bean id="bookAction" class="com.sterning.books.web.actions.BooksAction" singleton="false">
<property name="booksService">
<ref bean="booksService"/>
</property>
<property name="pagerService">
<ref bean="pagerService"/>
</property>
</bean>

</beans>

2.web模式下加载

web.xml:
<context-param>
<param-name>log4jConfigLocation</param-name>
<param-value>/WEB-INF/classes/log4j.properties</param-value>
</context-param>
<!-- ContextConfigLocation -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/spring-context/applicationContext.xml</param-value>
</context-param>

<!-- Listener contextConfigLocation -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>
<!-- Listener log4jConfigLocation -->
<listener>
<listener-class>org.springframework.web.util.Log4jConfigListener</listener-class>
</listener>

另外参考：

http://hi.baidu.com/aimy_xmu/blog/item/1c2a969b715d4cb0c9eaf4ee.html