spring2.5 引入资源文件的方式

 以前项目中引入 数据库 连接相关的字符串 都是使用

<bean id="propertyConfigurer" class="org.springframework.beans.factory.config.PropertyPlaceholderConfigurer">
		<property name="locations">
			<list>
				<value>classpath:frameworkconfig/jdbc/MySQL.properties</value>
			</list>
		</property>
	</bean>

 这种方式。

最近引入了spring 组件扫描

<context:component-scan base-package="cn.xxt">
		<context:include-filter type="regex" expression=".action.*"/>
		<context:include-filter type="regex" expression=".service.*"/>
        <context:exclude-filter type="annotation" expression="org.springframework.stereotype.Repository"/>
	</context:component-scan>

后，今天无意中点到了 看到了dtd的提示 中有句 Note: You may use placeholders in package paths, but only resolved
against system properties (analogous to resource paths).

Element : component-scan
Scans the classpath for annotated components that will be auto-registered as Spring beans. By 
 default, the Spring-provided @Component, @Repository, @Service, and @Controller stereotypes will 
 be detected. Note: This tag implies the effects of the 'annotation-config' tag, activating 
 @Required, @Autowired, @PostConstruct, @PreDestroy, @Resource, @PersistenceContext and 
 @PersistenceUnit annotations in the component classes, which is usually desired for autodetected 
 components (without external configuration). Turn off the 'annotation-config' attribute to 
 deactivate this default behavior, for example in order to use custom BeanPostProcessor definitions 
 for handling those annotations. Note: You may use placeholders in package paths, but only resolved 
 against system properties (analogous to resource paths). A component scan results in new bean 
 definition being registered; Spring's PropertyPlaceholderConfigurer will apply to those bean 
 definitions just like to regular bean definitions, but it won't apply to the component scan 
 settings themselves.

Content Model : (include-filter*, exclude-filter*)

就网上搜索了一下

找到了 还能如下用

<context:property-placeholder location="classpath:frameworkconfig/jdbc/MySQL.properties"/>

然后试了如下组合，也能用 上面的

<context:annotation-config/>