SSH(一)

系统程序架构：

   整合思路
       1.逆依赖方向而行，由Spring提供对象管理和服务
       2.依次实现Spring与Hibernate、Spring与Struts2的集成

配置web.xml文件：
   1.设置Spring配置文件
       Spring配置文件的存放位置，若文件放置在/WEB-INF/目录下且名称为applicationContext.xml，可以不配置此项
   范例：

1 <context-param>
2         <param-name>contextConfigLocation</param-name>
3         <param-value>classpath:applicationContext.xml</param-value>
4 </context-param>

   2.指定何时启动Spring容器
       该监听器用于在web环境中启动Spring容器
   范例：

1 <listener>
2         <listener-class>
3             org.springframework.web.context.ContextLoaderListener
4         </listener-class>
5 </listener>

   3.配置OpenSessionInVIew模式
       该过滤器把一个Hibernate Session和一次完整的请求过程相绑定解决了诸如延迟加载等问题。
   范例：

 1 <filter>
 2         <filter-name>OpenSessionInViewFilter</filter-name>
 3         <filter-class>
 4             org.springframework.orm.hibernate3.support.OpenSessionInViewFilter
 5         </filter-class>
 6 </filter>
 7 <filter-mapping>
 8         <filter-name>OpenSessionInViewFilter</filter-name>
 9         <url-pattern>/*</url-pattern>
10 </filter-mapping>

    注意：
   1. 该过滤器要配置在Struts 2核心控制器之前
   2. 若Spring中定义的SessionFactory Bean的id不是sessionFactory，需要为该过滤器配置sessionFactoryBeanName参数

在Spring中配置数据源和会话工厂：
   方法一：配置文件分离
       a.定义独立的Hibernate配置文件
       b.由Spring导入并创建会话工厂Bean
   方法二：在Spring配置文件中进行集中配置
       a.先配置数据源，再以此为基础配置会话工厂Bean
       b.持久化类的映射文件可以逐个配置，也可以按目录导入

使用HibernateDaoSupport基类：
   1.HibernateDaoSupport基类的setSessionFactory()方法
   范例：

1  <bean id="sessionFactory"
2         class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
3         <property name="configLocation" value="classpath:hibernate.cfg.xml"></property>
4 </bean>
5 
6 <bean id="userDao" class="com.xuetang9.demo.dao.impl.UserDaoImpl">
7         <property name="sessionFactory" ref="sessionFactory"></property>
8 </bean>

1.hibernate的配置文件自动生成时，没有userName 和 password？

范例：
1.hibernate.cfg.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <!DOCTYPE hibernate-configuration PUBLIC
 3         "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
 4         "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">
 5 <hibernate-configuration>
 6     <session-factory>
 7         <property name="hibernate.connection.driver_class">com.mysql.jdbc.Driver</property>
 8         <property name="hibernate.connection.url">jdbc:mysql://localhost/hibernatedb</property>
 9            <property name="connection.username">root</property>
10         <property name="connection.password">root</property>
11         <property name="hibernate.dialect">org.hibernate.dialect.MySQLDialect</property>
12         <property name="show_sql">true</property>
13         <property name="format_sql">true</property>
14         
15         <mapping resource="com/Elastic/SpringDemo3/ivy/entity/User.hbm.xml"/>
16         
17     </session-factory>
18 </hibernate-configuration>

2.struts.xml

1 <?xml version="1.0" encoding="UTF-8"?>
2 <!DOCTYPE struts PUBLIC
3     "-//Apache Software Foundation//DTD Struts Configuration 2.3//EN"
4     "http://struts.apache.org/dtds/struts-2.3.dtd">
5     
6 <struts>
7 
8 </struts>

3.web.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns="http://java.sun.com/xml/ns/javaee" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd" id="WebApp_ID" version="2.5">
 3   <display-name>SpringDemo3_ivy</display-name>
 4   <welcome-file-list>
 5     <welcome-file>index.html</welcome-file>
 6     <welcome-file>index.htm</welcome-file>
 7     <welcome-file>index.jsp</welcome-file>
 8     <welcome-file>default.html</welcome-file>
 9     <welcome-file>default.htm</welcome-file>
10     <welcome-file>default.jsp</welcome-file>
11   </welcome-file-list>
12  
13   <!-- 配置Spring文件的位置 -->
14   <context-param>
15       <param-name>contextConfigLocation</param-name><!-- 固定 -->
16       <!-- classPath:表示放在项目的根目录下 -->
17       <param-value>classPath:applicationContext.xml</param-value>
18   </context-param>
19  
20   <!-- 配置Spring的启动监听器 -->
21   <listener>
22       <listener-class>org.springframework.web.context.ContextCleanupListener</listener-class>
23   </listener>
24  
25   <!-- 配置OpenSessionInView模式 -->
26   <filter>
27       <filter-name>OpenSessionInView</filter-name>
28       <filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
29   </filter>
30   <filter-mapping>
31       <filter-name>OpenSessionInView</filter-name>
32       <url-pattern>/*</url-pattern>
33   </filter-mapping>
34  
35   <!-- 配置Struts2核心控制器 -->
36   <filter>
37       <filter-name>Struts2</filter-name>
38       <filter-class>org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter</filter-class>
39   </filter>
40   <filter-mapping>
41       <filter-name>Struts2</filter-name>
42       <url-pattern>/*</url-pattern>
43   </filter-mapping>
44  
45   <!-- 配置HttpSession过期时间（单位：分钟） -->
46   <session-config>
47       <session-timeout>20</session-timeout>
48   </session-config>
49 
50 </web-app>

4.applicationContext.xml

 1 <?xml version="1.0" encoding="UTF-8"?>
 2 <beans xmlns="http://www.springframework.org/schema/beans"
 3     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
 4     xmlns:aop="http://www.springframework.org/schema/aop"
 5     xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-3.2.xsd
 6         http://www.springframework.org/schema/aop http://www.springframework.org/schema/aop/spring-aop-3.2.xsd">
 7 
 8     <!-- 配置SessionFactory(方法1：独立hibernate配置文件) -->
 9     <!-- <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
10         <property name="configLocation" value="classPath:applicationContext.xml"></property>
11     </bean> -->
12     
13     <!-- 使用Spring集成Hibernate（方法2：不需要hibernate配置文件） -->
14     <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource">
15         <property name="user" value="root"></property>
16         <property name="password" value="root"></property>
17         <property name="jdbcUrl" value="jdbc:mysql://localhost/hibernatedb"></property>
18         <property name="driverClass" value="com.mysql.jdbc.Driver"></property>
19         
20         <!-- 连接池 -->
21         <property name="initialPoolSize" value="10"></property>
22         <property name="minPoolSize" value="5"></property>
23         <property name="maxPoolSize" value="100"></property>
24         <property name="acquireIncrement" value="3"></property>
25         <!-- 请求获取连接的重试次数 -->
26         <property name="acquireRetryAttempts" value="3"></property>
27         <property name="acquireRetryDelay" value="5"></property>
28         <property name="idleConnectionTestPeriod" value="60"></property>
29         
30     </bean>
31     
32     <!-- 使用dataSource配置SessionFactory -->
33     <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
34         <property name="dataSource" ref="dataSource"></property>
35         <property name="hibernateProperties">
36             <props>
37                 <prop key="dialect">org.hibernate.dialect.MySQLDialect</prop>
38                 <prop key="show_sql">true</prop>
39                 <prop key="format_sql">true</prop>
40             </props>
41         </property>
42         
43         <!-- 通配 -->
44         <property name="mappingLocations" value="classPath:com/Elastic/SpringDemo3/ivy/entity/*.hbm.xml">
45         </property>
46         
47         <!-- 穷举 -->
48         <!-- <property name="mappingLocations">
49             <list>
50                 <value>classPath:com/Elastic/SpringDemo3/ivy/entity/*.hbm.xml</value>            
51             </list>
52         </property> -->
53         
54     </bean>
55 </beans>