<!-- 載入配置檔案properties 方法1 -->
	<context:property-placeholder location="classpath:application-config.properties"
		ignore-unresolvable="true" />
	
	<!-- 載入配置檔案properties 利用spring 方法2 -->
	<bean id="configProperties" class="org.springframework.beans.factory.config.PropertiesFactoryBean">
        <property name="locations">
            <list>
               <value>classpath:hibernate-db.properties</value>
            </list>
        </property>
        </bean>
             <bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PreferencesPlaceholderConfigurer">
             <property name="properties" ref="configProperties" />
        </bean>