Spring声明式事务

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    <bean id="aService" parent="transactionProxy">        <property name="target" >            <bean class="AServiceImpl">                <property name="aDao" ref="aDao" />            </bean>        </property>    </bean>

    当应用从应用上下文里请求一个<span style="font-family: Arial, Helvetica, sans-serif;">aService时，它将得到一个被</span><span style="font-family: Arial, Helvetica, sans-serif;">TransactionProxyFactoryBean包裹的实例，（原来的</span><span style="font-family: Arial, Helvetica, sans-serif;">aService对象应该被重命名，否则对象的id冲突），target指向</span><span style="font-family: Arial, Helvetica, sans-serif;">AServiceImpl。即<span style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;">在父类中有一个target属性，这个</span></span><span style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;">target属性类似于</span><span style="font-family: Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;">ProxyFactoryBean的</span><span style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;">target属性-代理的目标对象：</span>

<span style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;"></span><pre name="code" class="html">   <property name="target" ><pre name="code" class="java"><span style="white-space:pre"></span><ref bean="<span style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif;">aServiceT</span><span style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif;">arget</span>"/>

</property>

<span style="font-family: Arial, Helvetica, sans-serif;"><span style="font-family: Verdana, Geneva, Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.799999237060547px;">所以给这个对象赋予class指定类的对象。</span></span>

    <bean id="transactionProxy" abstract="true" class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean"><property name="transactionManager"><ref bean="transactionManager" /></property><property name="transactionAttributes"><props><prop key="add*">PROPAGATION_REQUIRED,ISOLATION_DEFAULT,-tion</prop><prop key="*">PROPAGATION_REQUIRED,ISOLATION_DEFAULT,readOnly,-tion</prop></props></property>    </bean>

    <bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">       <property name="dataSource" ref="dataSource"/>    </bean>

<pre name="code" class="html">    <bean id="aDao" class="ADaoImpl">        <property name="sqlMapClientTemplate">            <ref bean="sqlMapClientTemplate"/>         </property>    </bean>

<!-- Spring iBatis SqlMapClient --><span style="white-space:pre"></span><bean id="sqlMapClient" class="org.springframework.orm.ibatis.SqlMapClientFactoryBean">    <property name="configLocation" value="classpath:sqlMapConfig.xml"/>    <property name="dataSource" ref="dataSource"/></bean>      <!-- Spring iBatisTemplate --><bean id="sqlMapClientTemplate" class="org.springframework.orm.ibatis.SqlMapClientTemplate">      <property name="sqlMapClient">          <ref bean="sqlMapClient"/>      </property></bean>

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