Referencing the external properties file in the spring configuration file

To refer to attributes defined in the properties file in spring XML requires special loading, first using the Propertyplaceholderconfigurer

The typical configuration is as follows:
<bean id= "Common.propertyconfigurer"
class= "Org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >
<property name= "Ignoreresourcenotfound" value= "true"/>
<property name= "Ignoreunresolvableplaceholders" value= "true"/>
<property name= "fileencoding" value= "UTF-8"/>
<property name= "Locations" >
<list>
<value>classpath*:conf/default-*.properties</value>
<value>classpath*:conf/*.properties</value>
</list>
</property>
</bean>

This is the list assignment of the called locations, or it can be a single
<bean class= "Org.springframework.beans.factory.config.PropertyPlaceholderConfigurer" >
<property name= "Locations" value= "Classpath:com/foo/jdbc.properties"/>
</bean>

Properties in the configuration:
Jdbc.driverclassname=org.hsqldb.jdbcdriver

In the following section, you can use the
Value= "${jdbc.driverclassname}"
To access the properties value