为什么springboot设置默认参数Springboot.setDefaultProperties(map)不生效

SpringApplication application = new SpringApplication(startClass);
//
Map<String, Object> params = new HashMap<>();
params.put("lai.ws.test","test");
application.setDefaultProperties(params);
ApplicationContext context = application.run(startClass,args);

  /**
   * Static helper that can be used to run a {@link SpringApplication} from the
   * specified sources using default settings and user supplied arguments.
   * @param primarySources the primary sources to load
   * @param args the application arguments (usually passed from a Java main method)
   * @return the running {@link ApplicationContext}
   */
  public static ConfigurableApplicationContext run(Class<&#63;>[] primarySources,
      String[] args) {
    return new SpringApplication(primarySources).run(args);
  }

ApplicationContext context = application.run(startClass,args);

ApplicationContext context = application.run(args);