Spring容器啟動配置
什么時候spring容器啟動?其實就是程序中執行加載 web.xml配置文件的時候。
Spring可以通過（Servlet） org.springframework.web.context.ContextLoaderServlet 和Listener（ org.springframework.web.context.ContextLoaderListener ）兩個類作為Spring啟動的入口。
- 1.應用程序下加載
ApplicationContext context = new FileSystemXmlApplicationContext("WebRoot/WEB-INF/applicationContext.xml");
applicationContext.xml內容如下：
<! 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??不過這里暫時沒注入 -->
???? < 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模式下加載
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>
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