public class DemoApplication  {
    public static void main(String[] args) {
         //springboot默認(rèn)的配置文件路徑
        // String addClassPath = "spring.config.location:classpath:/";
         //自定義的配置文件路徑
        String addClassPath = "spring.config.additional-location:classpath:/";
        addClassPath += ",classpath:/config/";
        addClassPath += ",classpath:/config/dev1/";
        addClassPath += ",classpath:/config/dev2/";
        addClassPath += ",classpath:/config/stg1/";
        addClassPath += ",classpath:/config/stg2/";
        addClassPath += ",classpath:/config/prd/";
        new SpringApplicationBuilder(DemoApplication.class).properties("spring.config.name:application", addClassPath).build().run(args);
    }

public class ConfigFileApplicationListener
		implements EnvironmentPostProcessor, SmartApplicationListener, Ordered {
		
	private static final String DEFAULT_PROPERTIES = "defaultProperties";

	// Note the order is from least to most specific (last one wins)
	private static final String DEFAULT_SEARCH_LOCATIONS = "classpath:/,classpath:/config/,file:./,file:./config/";

	private static final String DEFAULT_NAMES = "application";

	private static final Set<String> NO_SEARCH_NAMES = Collections.singleton(null);

	/**
	 * The "active profiles" property name.
	 */
	public static final String ACTIVE_PROFILES_PROPERTY = "spring.profiles.active";

	/**
	 * The "includes profiles" property name.
	 */
	public static final String INCLUDE_PROFILES_PROPERTY = "spring.profiles.include";

	/**
	 * The "config name" property name.
	 */
	public static final String CONFIG_NAME_PROPERTY = "spring.config.name";

	/**
	 * The "config location" property name.
	 */
	public static final String CONFIG_LOCATION_PROPERTY = "spring.config.location";

	/**
	 * The "config additional location" property name.
	 */
	public static final String CONFIG_ADDITIONAL_LOCATION_PROPERTY = "spring.config.additional-location";

	/**
	 * The default order for the processor.
	 */
	public static final int DEFAULT_ORDER = Ordered.HIGHEST_PRECEDENCE + 10;

	/**
	 * Name of the application configuration {@link PropertySource}.
	 */
	@Deprecated
	public static final String APPLICATION_CONFIGURATION_PROPERTY_SOURCE_NAME = "applicationConfigurationProperties";

	private final DeferredLog logger = new DeferredLog();

	private String searchLocations;

	private String names;

	private int order = DEFAULT_ORDER;
      。。。。。。。。。（略）