Spring : PropertyOverrideConfigurer

This class help us to set the bean properties in a property file without even using placeholders in the xml file.

We can define bean the usual way:

<!--  The properties of the bean are missing in the xml as we will load them
    from the properties file -->
     <bean id="myDataSource" 
          class="org.springframework.jdbc.datasource.DriverManagerDataSource" />

Consider the property file:

#db2.properties
myDataSource.driverClassName=com.mysql.jdbc.Driver
myDataSource.url=jdbc:mysql://localhost:3306/test
myDataSource.username=root
myDataSource.password=

Now to refer to the location of properties file.

 

Old-style config:

<!-- Old style configuration-->
    <bean class="org.springframework.beans.factory.config.PropertyOverrideConfigurer">
        <property name="location" value="classpath:package-com.xxxx/db2.properties" />
    </bean>

New style config : Use property-override

<!-- Using context schema to achieve the same -->
    <context:property-override location="classpath:packageXXXX/db2.properties" />