PropertyPlaceholderConfigurer属性配置文件 资源文件绑定

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

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

/**
* Set a location of a properties file to be loaded.
* <p>Can point to a classic properties file or to an XML file
* that follows JDK 1.5's properties XML format.
*/
public void setLocation(Resource location) {
this.locations = new Resource[] {location};
}

/**
* Set locations of properties files to be loaded.
* <p>Can point to classic properties files or to XML files
* that follow JDK 1.5's properties XML format.
* <p>Note: Properties defined in later files will override
* properties defined earlier files, in case of overlapping keys.
* Hence, make sure that the most specific files are the last
* ones in the given list of locations.
*/
public void setLocations(Resource[] locations) {
this.locations = locations;
}