http://www.jayway.com/2014/02/16/spring-propertysource/

Spring @PropertySource


@Configuration
@PropertySource(value = "classpath:application.properties")
public class ApplicationConfig {

// more configuration ...
}


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@Configuration
@PropertySources({
@PropertySource("default.properties"),
@PropertySource(value = "file:${CONF_DIR}/optional-override.properties", ignoreResourceNotFound = true)
}
public class ApplicationConfig {
}