Spring、Struts2、Hibernate集成开…

       只要是JavaEE开发那必然会牵扯到三大框架整合开发，当然绝大多数公司都有自己的框架，而且把三大框架都整合好了，你可能只需简单的配置就可以用了，但是你还是要会最基础的三大框架整合，下面我们就简略的说一下。

 

版本：spring2.5 + struts 2.1.6 + hibernate3.2

 

整合主要步骤：

一、Spring整合Struts2

1、  在web.xml中

       加载AppliationContext采用listener方式：

       <context-param>

              <param-name>contextConfigLocation</param-name>

              <param-value>

                     /WEB-INF/spring-config/applicationContext.xml

              </param-value>

       </context-param>

       <listener>

              <listener-class>

                     org.springframework.web.context.ContextLoaderListener

              </listener-class>

       </listener>

       <!-- 配置struts2前端控制器 -->

       <filter>

              <filter-name>struts2</filter-name>

              <filter-class>

                     org.apache.struts2.dispatcher.ng.filter.StrutsPrepareAndExecuteFilter

              </filter-class>

       </filter>

 

       <filter-mapping>

              <filter-name>struts2</filter-name>

              <url-pattern>*.action</url-pattern>

       </filter-mapping>

 

2、  在struts.xml中

       添加Action由spring创建

       <constant name="struts.objectFactory" value="spring" />

       注意：Action中的class是个“逻辑名称”要与application中bean 的id名一样

具体代码如下：

<struts>

       <constant name="struts.objectFactory" value="spring" />

       <package name="user" extends="struts-default">

              <action name="login" method="login" class="LoginAction">

                     <result name="success">/success.jsp</result>

              </action>

       </package>

</struts>

 

3、 在applicationContext.xml中

       实际处理的Action，scope="prototype"，该属性说明Action可以生成多个 

具体代码如下：

       <bean id="LoginAction" scope="prototype" class="action.LoginAction" />

<!--以上完成了Struts2与Spring的整合-->

 

二、Spring整合Hibernate

以下配置全部是在applicationContext.xml中

1、配置数据源

Spring内置实现 DriverManagerDataSource      

       <bean id="dataSource"

              class="org.springframework.jdbc.datasource.DriverManagerDataSource">

              <property name="driverClassName">

                     <value>com.mysql.jdbc.Driver</value>

              </property>

              <property name="url">

                     <value>jdbc:mysql://localhost:3306/test</value>

              </property>

              <property name="username">

                     <value>root</value>

              </property>

              <property name="password">

                     <value></value>

              </property>

       </bean>

 

2、配置sessionFactory

       <bean id="sessionFactory"

              class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">

              <property name="dataSource">

                     <ref bean="dataSource" />

              </property>

              <property name="mappingResources">

                     <list>

                            <value>domain/User.hbm.xml</value>

                     </list>

              </property>

              <property name="hibernateProperties">

                     <props>

                            <prop key="hibernate.dialect">

                                   org.hibernate.dialect.MySQLDialect

                     </prop>

                            <prop key="hibernate.show_sql">true</prop>

                     </props>

              </property>

       </bean>

 

3、配置Dao

       <bean id="userDao" class="dao.UserDaoHibernateImpl">

              <property name="sessionFactory">

                     <ref bean="sessionFactory" />

              </property>

       </bean>

注意：以上配置是要求Dao 必须继承自HibernateDaoSupport

 

4、事务：

       ① Spring事务机制

              声明式事务、事务管理器

       ② 配置事务管理器

       <bean id="transactionManager"

              class="org.springframework.orm.hibernate3.HibernateTransactionManager">

              <property name="sessionFactory">

                     <ref bean="sessionFactory" />

              </property>

       </bean>

       <!-- TransactionAdvice -->

       <tx:advice id="txAdvice" transaction-manager="transactionManager">

              <tx:attributes>

                     <tx:method name="update*" propagation="REQUIRED" />

                     <tx:method name="*" propagation="SUPPORTS" read-only="true" />

              </tx:attributes>

       </tx:advice>

       <!--通过AOP 完成织入 -->

       <aop:config>

              <aop:advisor pointcut="execution(* service.*(..))"

                     advice-ref="txAdvice" />

       </aop:config>

 

以上完成了整个SSH的整合

 

下面补充Spring与JDBC的整合

数据源的配置同上

       <bean id="userDao" class="dao.userDaoImpl">

              <property name="dataSource" ref="dataSource" />

       </bean>

       <!-- 注意：以上配置是要求dao 继承JdbcDaoSupport -->

       <!-- JDBC事务配置，TransactionManager依赖于dataSource -->

       <!-- TransactionManager -->

       <bean id="transactionManager"

              class="org.springframework.jdbc.datasource.DataSourceTransactionManager">

              <property name="dataSource" ref="dataSource" />

       </bean>

       <!-- TransactionAdvice -->

       <tx:advice id="tsAdvice" transaction-manager="transactionManager">

              <tx:attributes>

                     <tx:method name="*" propagation="REQUIRED" />

              </tx:attributes>

       </tx:advice>

       <!-- 通过AOP 完成织入 -->

       <aop:config>

              <aop:pointcut id="pc" expression="execution(* dao.userDao.*(..))" />

              <aop:advisor advice-ref="tsAdvice" pointcut-ref="pc" />

       </aop:config>