Spring2.5+Hibernate3.3+Struts1.3整合开发

hibernate核心安装包下的:
hibernate3.jar
lib/required/*.jar
lib/optional/ehcache-1.2.3.jar
hibernate 注解安装包下的
lib/test/slf4j-log4j12.jar

Spring安装包下的
dist/spring.jar
dist/modules/spring-webmvc-struts.jar
lib/jakarta-commons/commons-logging.jar、commons-dbcp.jar、commons-pool.jar
lib/aspectj/aspectjweaver.jar、aspectjrt.jar
lib/cglib/cglib-nodep-2.1_3.jar
lib/j2ee/common-annotations.jar
lib/log4j/log4j-1.2.15.jar

Struts
下载struts-1.3.8-lib.zip，需要使用到解压目录下的所有jar，建议把jstl-1.0.2.jar和standard-1.0.2.jar更换为1.1版本。Spring中已经存在一个antlr-2.7.6.jar，所以把struts中的antlr-2.7.2.jar删除，避免jar冲突。
数据库驱动jar

<bean id="dataSource" class="org.apache.commons.dbcp.BasicDataSource" destroy-method="close">
..... 略 </bean>
<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingResources">
<list>
<value>cn/itcast/bean/Person.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
hibernate.hbm2ddl.auto=update
hibernate.show_sql=false
hibernate.format_sql=false
</value>
</property>
</bean>
<bean id="txManager" class="org.springframework.orm.hibernate3.HibernateTransactionManager">
<property name="sessionFactory" ref="sessionFactory"/>
</bean>
<tx:annotation-driven transaction-manager="txManager"/>

实体bean配置模版.hbm.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.itcast.bean">
<class name="Person" table="person">
<id name="id" type="integer" >
<generator class="native"/>
</id>
<property name="name" length="10" not-null="true"/>
</class>

</hibernate-mapping>

Hibernate二级缓存的配置

在需要缓存的实体bean配置文件中加入缓存配置项

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE hibernate-mapping PUBLIC
"-//Hibernate/Hibernate Mapping DTD 3.0//EN"
"http://hibernate.sourceforge.net/hibernate-mapping-3.0.dtd">
<hibernate-mapping package="cn.itcast.bean">
<class name="Person" table="person">
<cache usage="read-write" region="cn.itcast.bean.Person"/>
<id name="id">
<generator class="native"/>
</id>
<property name="name" length="10" not-null="true"/>
</class>
</hibernate-mapping>

usage说明了缓存的策略，region指定缓存的区域名

Ehcache默认的配置文件ehcache.xml（放在类路径下）
<ehcache>
<diskStore path="D:/cache"/>
<defaultCache maxElementsInMemory="1000“ eternal="false“ overflowToDisk="true"
timeToIdleSeconds="120"
timeToLiveSeconds="180"
diskPersistent="false"
diskExpiryThreadIntervalSeconds="60"/>
<cache name="cn.itcast.bean.Person" maxElementsInMemory="100" eternal="false"
overflowToDisk="true" timeToIdleSeconds="300" timeToLiveSeconds="600" diskPersistent="false"/>
</ehcache>

defaultCache节点为缺省的缓存策略
maxElementsInMemory 内存中最大允许存在的对象数量
eternal 设置缓存中的对象是否永远不过期
overflowToDisk 把溢出的对象存放到硬盘上
timeToIdleSeconds 指定缓存对象空闲多长时间就过期,过期的对象会被清除掉
timeToLiveSeconds 指定缓存对象总的存活时间
diskPersistent 当jvm结束是是否持久化对象
diskExpiryThreadIntervalSeconds 指定专门用于清除过期对象的监听线程的轮询时间

在web容器中实例化spring容器

<!-- 指定spring的配置文件，默认从web根目录寻找配置文件，我们可以通过spring提供的classpath:前缀指定从类路径下寻找 -->
<context-param>
<param-name>contextConfigLocation</param-name>
<param-value>classpath:beans.xml</param-value>
</context-param>
<!-- 对Spring容器进行实例化 -->
<listener>
<listener-class>org.springframework.web.context.ContextLoaderListener</listener-class>
</listener>

在web容器中配置struts

<servlet>
<servlet-name>struts</servlet-name>
<servlet-class>org.apache.struts.action.ActionServlet</servlet-class>
<init-param>
<param-name>config</param-name>
<param-value>/WEB-INF/struts-config.xml</param-value>
</init-param>
<load-on-startup>0</load-on-startup>
</servlet>
<servlet-mapping>
<servlet-name>struts</servlet-name>
<url-pattern>*.do</url-pattern>
</servlet-mapping>

如果action没有交给spring管理时，我们通过下面语句获取spring容器实例
WebApplicationContext ctx = WebApplicationContextUtils.getWebApplicationContext(this.getServlet().getServletContext());

把action交给spring管理后，我们可以使用依赖注入在action中注入业务层的bean。确保action的path属性值与bean的名称相同。

<action path="/person/list" ...>
</action>

Spring 配置：
<bean name="/person/list" class="cn.itcast.web.action.PersonAction"/>

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
<property name="dataSource" ref="dataSource"/>
<property name="mappingResources">
<list>
<value>cn/itcast/bean/Person.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<value>
hibernate.dialect=org.hibernate.dialect.MySQL5Dialect
hibernate.hbm2ddl.auto=update
hibernate.show_sql=false
hibernate.format_sql=false
hibernate.cache.use_second_level_cache=true
hibernate.cache.use_query_cache=false
hibernate.cache.provider_class=org.hibernate.cache.EhCacheProvider
</value>
</property>
</bean>

在struts配置文件中添加进spring的请求控制器，该请求控制器会先根据action的path属性值到spring容器中寻找跟该属性值同名的bean。如果寻找到即使用该bean处理用户请求
<controller>
<set-property property="processorClass" value="org.springframework.web.struts.DelegatingRequestProcessor"/>
</controller>

使用spring解决struts1.3乱码问题

<filter>

<filter-name>encoding</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>encoding</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>

使用spring解决hibernate因session关闭导致的延迟加载例外问题

<filter>
<filter-name>OpenSessionInViewFilter</filter-name>
<filter-class>

org.springframework.orm.hibernate3.support.OpenSessionInViewFilter

</filter-class>
</filter>
<filter-mapping>
<filter-name>OpenSessionInViewFilter</filter-name>
<url-pattern>/*</url-pattern>
</filter-mapping>