Here we have configured the spring mvc configuration. In @ComponentScan we can give the path where we have our components(like controller, model, dao etc).

For adding the single properties file we use: @PropertySource("classpath:application.properties")

and for multiple files we use: @PropertySources({ @PropertySource("classpath:application.properties"), @PropertySource("classpath:mail.properties") })

@Configuration
@EnableWebMvc
@EnableTransactionManagement
@ComponentScan(basePackages = "com.data.*")
@PropertySources({
    @PropertySource("classpath:application.properties"),
    @PropertySource("classpath:mail.properties")
})
public class CustomConfiguration extends WebMvcConfigurerAdapter {
     //other configuration details like view resolver, data source, hibernate setting etc.
}