辅导:hibernate做持久层,spring管理事物的架构方式
来源:优易学  2011-11-9 13:41:58   【优易学:中国教育考试门户网】   资料下载   IT书店
  直接上代码:
  <?xml version="1.0" encoding="UTF-8"?>
  <beans xmlns="http://www.springframework.org/schema/beans"
  xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
   xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">  
  <!-- define basic datasource by apache dbcp
  虽然hibernate的高级版本已经明确的指出对dbcp不再提供支持,但是就开发阶段来说,
  使用dbcp配置数据源未曾不可.....
  -->
  <bean id="basicDataSource" class="org.apache.commons.dbcp.BasicDataSource">
  <property name="driverClassName" value="com.mysql.jdbc.Driver" />
  <property name="url" value="jdbc:mysql://localhost/schooldb?characterEncoding=utf-8" />
  <property name="username" value="root" />
  <property name="password" value="123456"/>
  </bean>
  <!-- define transaction aware data source proxy
  定义proxy,是spring感知数据源....
  -->
  <bean id="transactionAwareDataSourceProxy" class="org.springframework.jdbc.datasource.TransactionAwareDataSourceProxy">
  <constructor-arg>
  <ref bean="basicDataSource" />
  </constructor-arg>
  </bean>
  <!-- define session factory by transaction aware data source proxy
  使用spring support的sessionfactory 配合spring已经感知的数据源来定义sessionfactory...
  -->
  <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
  <property name="dataSource">
  <ref bean="transactionAwareDataSourceProxy" />
  </property>
  <property name="hibernateProperties">
  <props>
  <prop key="hibernate.dialect">org.hibernate.dialect.MySQLDialect</prop>
  <prop key="hibernate.show_sql">false</prop>
  <prop key="hibernate.cache.provider_class">org.hibernate.cache.OSCacheProvider</prop>
  </props>
  </property>
  <property name="mappingResources">
  <list>
  <value>mapping.hbm.xml</value>
  </list>
  </property>
  </bean>
  <!-- define dao by session factory
  定义 data access object ,
  次类需要 扩展 org.springframework.orm.hibernate3.support.HibernateDaoSupport...
  -->
  <bean id="hibernateBasedDAO" class="com.gmail.chrnc0000.hibernate.HibernateBasedDAO">
  <property name="sessionFactory">
  <ref bean="sessionFactory" />
  </property>
  </bean>
  <!-- define spring transaction manager by session factory -->
  <bean id="hibernateTransactionManager"
  class="org.springframework.orm.hibernate3.HibernateTransactionManager">
  <property name="sessionFactory">
  <ref bean="sessionFactory" />
  </property>
  </bean>
  <!--
  定义 spring interceptor ,并且对需要回滚的异常进行配置...
  -->
  <bean id="transactionProxyFactoryBean" lazy-init="true" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">
  <property name="transactionManager">
  <ref bean="hibernateTransactionManager" />
  </property>
  <property name="transactionAttributes">
  <props>
  <prop key="find*">PROPAGATION_REQUIRED</prop>
  <prop key="save*">PROPAGATION_REQUIRED,-Exception</prop>
  <prop key="update*">PROPAGATION_REQUIRED</prop>
  <prop key="delete*">PROPAGATION_REQUIRED,-Exception</prop>
  </props>
  </property>
  </bean>
  <!-- define service
  定义interceptor 配合的 service ...
  -->
  <bean id="transactionProxyBasedService" parent="transactionProxyFactoryBean">
  <property name="target">
  <bean class="com.gmail.chrnc0000.spring.TransactionProxyBasedService">
  <property name="hibernateBasedDAO">
  <ref local="hibernateBasedDAO" />
  </property>
  </bean>
  </property>
  </bean>
  <!-- export rmi service
  如果需要的话,把interceptor配合的service 暴露...
  -->
  <bean id="BLService" class="org.springframework.remoting.rmi.RmiServiceExporter">
  <property name="serviceName" value="BLService" />
  <property name="service" ref="transactionProxyBasedService" />
  <property name="serviceInterface" value="com.gmail.chrnc0000.IService" />
  <property name="registryPort" value="1299" />
  </bean>
  </beans>
  感觉好像所有的东西都是spring,spring ,spring....
  的确,ormapping方面来说,hibernate在国内还算比较大众的一个框架,开发起来没风险,学习起来也有丰富的资源
  就mvc来说呢,struts1是比较大众耳熟能详的,虽然就像jbuilder换了eclipse的芯,struts换了webwork的芯一样,虽然注定是呗淘汰的东西,但是就国内的新技术接受能力来看,struts1至少在国内还是有市场滴...
  spring呢?太强的一个东西了,什么都能做...你像用它来做持久?没问题,想用它来做mvc?没问题,但是springMVC说实话有点玩不动..所以比较中立的开发方式(人家说的)是spring配合一个熟悉的 mvc框架,和orm框架,spring来“组装”,同时spring管理持久层的事物...

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