Struts+Spring+Hibernate整合

这段笔记三两年前写的，一直因为一些琐事，或者搞忘记了，没有发。今天偶然翻出了它，就和大家一起分享下吧。

1.导入jar包

Struts的jar包：

Spring的jar包：

Hibernate的jar包：

注意：只保留一个高版本的common-logging.jar包，Struts的jar包中struts2-spring-plugin-2.1.8.jar是必须要导入的，因为其是整合Struts和Spring的一个关键性jar包

2.Hibernate和Spring的整合

建议先整合Spring和Hibernate。

2.1方法一 保留hibernate.cfg.xml文件

Hibernate的hibernate.cfg.xml代码不变，如下示例：

<!DOCTYPE hibernate-configuration PUBLIC
          "-//Hibernate/Hibernate Configuration DTD 3.0//EN"
          "http://hibernate.sourceforge.net/hibernate-configuration-3.0.dtd">

<!-- Generated by MyEclipse Hibernate Tools.                   -->
<hibernate-configuration>

	<session-factory>
		<property name="connection.driver_class">
oracle.jdbc.driver.OracleDriver
</property>
		<property name="connection.url">
jdbc:oracle:thin:@localhost:1521:orcl
</property>
		<property name="connection.username">admin</property>
		<property name="connection.password">admin</property>

		<property name="hibernate.c3p0.max_size">20</property>
		<property name="hibernate.c3p0.max_statements">1</property>
		<property name="hibernate.c3p0.timeout">1800</property>
		<property name="hibernate.c3p0.max_statements">50</property>

		<property name="hibernate.dialect">
org.hibernate.dialect.Oracle10gDialect
</property>
		<property name="show_sql">true</property>
		<property name="hibernate.hbm2ddl.auto">update</property>

		<mapping resource="com/wzm/bean/User.hbm.xml"/>

	</session-factory>

</hibernate-configuration>

Spring的application.xml文件整合Hibernate代码如下：

<beans
	xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xmlns:p="http://www.springframework.org/schema/p"
xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.5.xsd">

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="configLocation" value="classpath:hibernate.cfg.xml">
		</property>
	</bean>
</beans>

2.2 方法二 废弃使用hibernate.cfg.xml文件

将数据库的配置放在Spring的配置文件application.xml文件中，代码如下：

<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"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:p="http://www.springframework.org/schema/p"
	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
			http://www.springframework.org/schema/tx
			http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
			http://www.springframework.org/schema/aop
			http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

	<context:component-scan base-package="com.wzm"/>

	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
	   <property name="driverClass" value="oracle.jdbc.driver.OracleDriver"/>
	   <property name="jdbcUrl" value="jdbc:oracle:thin:@localhost:1521:orcl"/>
	   <property name="user" value="admin"/>
	   <property name="password" value="admin"/>
<property name="maxPoolSize" value="20"/>
	   <property name="minPoolSize" value="1"/>
	   <property name="initialPoolSize" value="1"/>
	   <property name="maxIdleTime" value="20"/>
	</bean>
	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource"/>
		<property name="mappingResources">
			<list>
				<value>com/wzm/bean/User.hbm.xml</value>
			</list>
		</property>
		<property name="hibernateProperties">
			<value>
				hibernate.dialect=org.hibernate.dialect.Oracle10gDialect
				hibernate.hbm2ddl.auto=update
				hibernate.show_sql=true
			</value>
		</property>
	</bean>
</beans>

2.3 使用properties文件提供数据库接口

这里的接口并非Java中的接口，而是指提供可扩展的接入点，properties文件中的代码如下：

URL=jdbc:oracle:thin:@localhost:1521:orcl
DRIVER=oracle.jdbc.driver.OracleDriver
USERNAME=admin
PASSWORD=admin

#URL=jdbc:jtds:sqlserver://localhost:1433/qhit02
#DRIVER=net.sourceforge.jtds.jdbc.Driver
#USERNAME=sa
#PASSWORD=sa1234

该文件中提供了Oracle11g和SQL Server两种数据库接口（接入点），甚至可以写入更多的数据库的信息，“#”是注销，即其后的代码不可用。
Spring的application.xml中的配置代码如下：

<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"
	xmlns:aop="http://www.springframework.org/schema/aop"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xmlns:p="http://www.springframework.org/schema/p"
	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
			http://www.springframework.org/schema/tx
			http://www.springframework.org/schema/tx/spring-tx-2.5.xsd
			http://www.springframework.org/schema/aop
			http://www.springframework.org/schema/aop/spring-aop-3.0.xsd">

	<context:component-scan base-package="com.wzm"/>
	<context:property-placeholder location="classpath:DBOption.properties"/>

	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
		<property name="driverClass" value="${DRIVER}"/>
		<property name="jdbcUrl" value="${URL}"/>
		<property name="user" value="${USERNAME}"/>
		<property name="password" value="${PASSWORD}"/>
		<property name="maxPoolSize" value="20"/>
		<property name="minPoolSize" value="1"/>
		<property name="initialPoolSize" value="1"/>
		<property name="maxIdleTime" value="20"/>
	</bean>
	<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
		<property name="dataSource" ref="dataSource"/>
		<property name="mappingResources">
			<list>
				<value>com/wzm/persistence/entiy/User.hbm.xml</value>
			</list>
		</property>
		<property name="hibernateProperties">
			<value>
				hibernate.dialect=org.hibernate.dialect.Oracle10gDialect
				hibernate.hbm2ddl.auto=update
				hibernate.show_sql=true
			</value>
		</property>
	</bean>
</beans>

3.整合Struts和Spring

整合Struts和Spring时，只需在WebRoot\WEB-INF\web.xml文件中加入Struts的过滤器和Spring的监听器即可，代码如下：

<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>

  	<!-- 配置监听器 -->
  	<context-param>
    	<param-name>contextConfigLocation</param-name>
   		<param-value>
classpath:application.xml
</param-value>
 	 </context-param>
  	<listener>
   	 	<listener-class>
org.springframework.web.context.ContextLoaderListener
</listener-class>
 </listener>

（注意：配置多个Spring Bean文件时，这样写classpath:applicationContext.xml,classpath:bean.xml）

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