PropertyConfiguredDataSourceFactoryBean.java

public class PropertyConfiguredDataSourceFactoryBean implements FactoryBean<DataSource> {
  
	private String productionProperty;
	private String devProperty;
	private String envName;

	public DataSource getObject() throws Exception {
		String propFileName = getPropertyFilenameByENV();
		Properties p = PropertiesLoaderUtils.loadAllProperties(propFileName);
		return BasicDataSourceFactory.createDataSource(p);
	}

	public String getPropertyFilenameByENV() {
		String n = devProperty;
		if ("production".equals(System.getenv(envName))) {
			n = productionProperty;
		}
		return n;
	}

  // ...
}