I was reading folowing lines and I did not understand clearly.
Externalizing the configuration
For the most part, it is possible to configure your entire application in a single
bean wiring file. But sometimes you may find it beneficial to extract certain pieces
of that configuration into a separate property file. For example, a configuration
concern that is common to many applications is configuring a data source. In
Spring, you could configure a data source with the following XML in the bean wiring
Any ideas, resources,sample code,links, highly appreciated. thanks in advance.