Spring2.5.6+Struts2.3.1+Hibernate3的整合

要整合SSH，简言之：将struts的Action交由Spring的容器来管理，hibernate的sessionFactory交由Spring容器来管理，而让web container启动时自动加载相关的Spring容器。

说是很简单，但我在进行整合时也是遇到了一些问题，主要是相关的jar包导入不全或导入的版本不相兼容所至，所以特别的在最后用图的形式贴出来。

如下图：

Struts (Web page) <---> Spring DI <--> Hibernate (DAO) <---> Database
the summary is:
To integrate all those technologies together, you should..

Integrate Spring with Hibernate with Spring’s “LocalSessionFactoryBean” class.

Integrate Spring with Struts via Spring’s ready make Struts plug-in – “ContextLoaderListener“.




如下为项目结构图：见projectView.jpg,
项目用到的lib:见projectViewLibs.jpg。



主要步骤如下：
1，新建一web project后，修改web.xml如下：


<?xml version="1.0" encoding="UTF-8"?>
<web-app 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>java_eBooking</display-name>
	<welcome-file-list>
		<welcome-file>index.jsp</welcome-file>
	</welcome-file-list>
	<!--  
		1、指定spring的配置文件，默认从webroot根目录(即webroot/WEB-INF/,跟web.xml要并列同级目录)寻找配置文件，  
		我们可以通过spring提供的classpath*:前缀指定从类路径下寻找  contextConfigLocation
	-->
	<!-- 
		<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>/WEB-INF/classes/applicationContext.xml
		</param-value>
		</context-param>
	-->


	<listener>
		<listener-class>
			org.springframework.web.context.ContextLoaderListener
		</listener-class>
	</listener>
	<context-param>
		<param-name>contextConfigLocation</param-name>
		<param-value>classpath*:applicationContext.xml</param-value>
	</context-param>


	<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>/*</url-pattern>
	</filter-mapping>
</web-app>

2，在src下新建struts.xml.具体如下：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE struts PUBLIC
    "-//Apache Software Foundation//DTD Struts Configuration 2.0//EN"
    "http://struts.apache.org/dtds/struts-2.0.dtd">
<struts>
    <constant name="struts.objectFactory" value="spring" />
    <constant name="struts.devMode" value="true" />


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


        <action name="list" class="hellowordAction" method="execute">
            <result>ebooking/list.jsp</result>
            <result name="input">ebooking/list.jsp</result>
        </action>


        <action name="remove" class="hellowordAction" method="remove">
            <result>ebooking/list.jsp</result>
            <result name="input">ebooking/list.jsp</result>
        </action>


        <action name="save" class="hellowordAction" method="save">
            <result>ebooking/list.jsp</result>
            <result name="input">ebooking/list.jsp</result>
        </action>
    </package>


</struts>

3，在src下新建applicationContext.xml.具体如下：

<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:context="http://www.springframework.org/schema/context"
	xsi:schemaLocation="http://www.springframework.org/schema/beans
           http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
           http://www.springframework.org/schema/context 
        http://www.springframework.org/schema/context/spring-context-2.5.xsd">
	<bean id="productService"
		class="com.ebooking.service.EbookingService" />
	<bean id="hellowordService"
		class="com.ebooking.service.HelloWordService">
		<property name="helloWordDao" ref="helloWordDao"></property>
	</bean>
	<bean id="eBookingAction"
		class="com.ebooking.web.struts.action.EbookingAction"
		scope="prototype">
	</bean>
	<bean id="hellowordAction"
		class="com.ebooking.web.struts.action.HelloWordAction"
		scope="prototype">
		<constructor-arg ref="hellowordService" />
	</bean>
	<bean id="helloWordDao"
		class="com.ebooking.dao.impl.HelloWordDaoImpl">
		 <property name="sessionFactory" ref="sessionFactory" />
	</bean>
<!--加载PropertyPlaceholderConfigurer后，就可以使用${jdbc.username}占位符了-->

	<bean
		class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<value>classpath:conn/jdbc.properties</value>
		</property>
	</bean>


	<bean id="sessionFactory"
		class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource" />
		<property name="mappingResources">
			<list>
				<value>com/ebooking/model/ebooking.hbm.xml</value>
			</list>
		</property>
		<property name="hibernateProperties">
			<props>
				<prop key="hibernate.dialect">
					org.hibernate.dialect.SQLServerDialect
				</prop>
				<prop key="hibernate.show_sql">true</prop>
				<prop key="hibernate.generate_statistics">true</prop>
			</props>
		</property>
	</bean>


	<bean id="dataSource"
		class="com.mchange.v2.c3p0.ComboPooledDataSource"
		destroy-method="close">
		<property name="driverClass" value="${jdbc.driverClassName}" />
		<property name="jdbcUrl" value="${jdbc.url}" />
		<property name="user" value="${jdbc.username}" />
		<property name="password" value="${jdbc.password}" />


		<property name="minPoolSize" value="2" />
		<property name="initialPoolSize" value="3" />
		<property name="maxPoolSize" value="10" />


		<property name="maxIdleTime" value="1800" />
		<property name="acquireIncrement" value="2" />
		<property name="maxStatements" value="3" />


		<property name="idleConnectionTestPeriod" value="1800" />
		<property name="acquireRetryAttempts" value="3" />
	</bean>
</beans>
 4,在“src/conn/”新建jdbc.properties:

jdbc.driverClassName=net.sourceforge.jtds.jdbc.Driver
jdbc.url=jdbc:jtds:sqlserver://localhost:1433/jpetstore
jdbc.username=sa
jdbc.password=db*888

 5,src目录下新建log4j.xml，具体如下：

<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE log4j:configuration SYSTEM "log4j.dtd">
<log4j:configuration>
	<appender name="logs"
		class="org.apache.log4j.RollingFileAppender">
		<param name="Encoding" value="GBK" />
		<param name="File" value="logs/logs.log" />
		<param name="MaxBackupIndex" value="300" />
		<param name="MaxFileSize" value="100000" />
		<layout class="org.apache.log4j.PatternLayout">
			<param name="ConversionPattern"
				value="%d{ISO8601} %p - %m %n" />
		</layout>
		<filter class="org.apache.log4j.varia.LevelRangeFilter">
			<param name="LevelMin" value="info" />
			<param name="LevelMax" value="error" />
			<param name="acceptOnMatch" value="true" />
		</filter>
	</appender>


	<logger name="com.ebooking.service" additivity="false">
		<level value="info" />
		<appender-ref ref="logs" />
	</logger>
  <root>
		<priority value="info" />
		<appender-ref ref="logs" />
	</root>
</log4j:configuration>
注意：
 由于 我并没有用到事务，所有在web.xml中并没有配置 openSessionInView这个filter,
如有用到或者当进行session.load(id)时必须在web.xml中作如下配置，否则会报错。
报错信息大致如下：
org.springframework.dao.InvalidDataAccessApiUsageException: Write operations are not allowed in read-only mode (FlushMode.NEVER/MANUAL): Turn your Session into FlushMode.COMMIT/AUTO or remove 'readOnly' marker from transaction definition.

当有用到事务，但并没有指定用 openSessionInView时，spring就会将所有的事务当作是只读事务来处理，当进行hibernateTemplate.save(ebooking)时就会报一个说是当前session处理于
read only状态，禁止进行写操作。
 <filter>
		<filter-name>openSessionInView</filter-name>
		<filter-class>org.springframework.orm.hibernate3.support.OpenSessionInViewFilter</filter-class>
		<init-param>
			<param-name>sessionFactoryBeanName</param-name>
			<param-value>sf</param-value>
		</init-param>
	</filter>
	
	<filter-mapping>
		<filter-name>openSessionInView</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

===增加事务配置如下，当然如果有许多服务对象，你想为他们分别设置 完全不同 的事务语义。 在Spring中，你可以通过分别定义特定的 <advisor></advisor> 元素， 让每个advisor采用不同的 'pointcut' 和 'advice-ref' 属性，来达到目的。 <!-- //jdbc datasource txManager <bean id="txManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager"> <property name="dataSource" ref="dataSource" /> </bean> --> <bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager"><property name="sessionFactory" ref="sessionFactory"></property></bean><config><pointcut id="bussinessService" expression="execution(public * com.ebooking.service.*.*(..))"></pointcut><advisor pointcut-ref="bussinessService" advice-ref="txAdvice"></advisor></config><advice id="txAdvice" transaction-manager="txManager"><attributes><method name="list" read-only="true"></method><method name="*" propagation="REQUIRED"></method></attributes></advice>