SSH框架結構

一個spring2.5+hibernate3.2+struts2.0的組合框架，使用spring的IoC來管理應用的所有bean，包括struts2的action，充分發揮了spring輕量級框架的優勢。


[code]
<?xml version="1.0" encoding="utf-8"?>
<web-app id="WebApp_ID" version="2.4" xmlns="http://java.sun.com/xml/ns/j2ee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://java.sun.com/xml/ns/j2ee http://java.sun.com/xml/ns/j2ee/web-app_2_4.xsd">
<display-name>FashionBookShop</display-name>
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>/WEB-INF/applicationContext.xml</param-value>
</context-param>

<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

<filter>
<filter-name>encodingFilter</filter-name>
<filter-class>org.springframework.web.filter.CharacterEncodingFilter</filter-class>
<init-param>
<param-name>encoding</param-name>
<param-value>UTF-8</param-value>
</init-param>
</filter>
<filter-mapping>
<filter-name>encodingFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>


<filter>
<filter-name>struts2</filter-name>
<filter-class>org.apache.struts2.dispatcher.FilterDispatcher</filter-class>
</filter>
<filter-mapping>
<filter-name>struts2</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>
<welcome-file-list>
<welcome-file>index.html</welcome-file>
<welcome-file>index.htm</welcome-file>
<welcome-file>index.jsp</welcome-file>
<welcome-file>default.html</welcome-file>
<welcome-file>default.htm</welcome-file>
<welcome-file>default.jsp</welcome-file>
</welcome-file-list>
<resource-ref>
<res-ref-name>jdbc/MyDataSource</res-ref-name>
<res-type>javax.sql.DataSource</res-type>
<res-auth>Container</res-auth>
<res-sharing-scope>Shareable</res-sharing-scope>
</resource-ref>
</web-app>
[/code]

在web.xml中使用listener的方式載入spring的web上下文，另外，還載入了struts2的過濾器。

applicationContext.xml文件如下：

[code]
<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">
<bean id="myDataSource" class="org.springframework.jndi.JndiObjectFactoryBean">
<property name="jndiName" value="java:comp/env/jdbc/MyDataSource"/>
</bean>

<bean id="mySessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="myDataSource"/>
<property name="mappingResources">
<list>
<value>org/tiantian/pojo/Book.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQLDialect
</value>
</property>
</bean>
<bean id="hibernateTemplate" class="org.springframework.orm.hibernate3.HibernateTemplate">
<property name="sessionFactory">
<ref bean="mySessionFactory"/>
</property>
</bean>
<bean id="bookDao" class="org.tiantian.dao.impl.BookDAOImpl">
<property name="hibernateTemplate">
<ref bean="hibernateTemplate"/>
</property>
</bean>
<bean id="BookAction" scope="prototype"
class="org.tiantian.struts2.action.BookAction">
<constructor-arg ref="bookDao" />
</bean>
</beans>
[/code]

配置了如下的依賴：sessionFactory->hibernateTemplate->bookDao->BookAction。

這樣整個框架就配置好了，在jsp中，可以使用下面的代碼獲得WebApplicationContext：

[code]
WebApplicationContext context = WebApplicationContextUtils.
getWebApplicationContext(this.getServletContext());
BookDAOImpl b=(BookDAOImpl)context.getBean("bookDao");
[/code]

在servlet或者daoimpl中，可以直接調用bean：

[code]
public void removeProduct(int id) {
Book b = (Book)this.getHibernateTemplate().get(Book.class, id);
this.getHibernateTemplate().delete(b);
// TODO Auto-generated method stub

}
[/code]