Spring Boot（一）启动方式

• 1、系统自动生成

  SpringApplication.run(XX.class, args);

• 2、创建SpringApplication对象

  SpringApplication app = new SpringApplication(DemoApplication.class);
  app.setBannerMode(Banner.Mode.OFF);
  app.run();

• 3、Fluent Builder API 构造者模式 也可以把参数放在run中

1）
new SpringApplicationBuilder(DemoApplication.class).bannerMode(Banner.Mode.CONSOLE).run();

2）
new SpringApplicationBuilder().sources(DemoApplication.class).bannerMode(Banner.Mode.OFF).run();

3)
new SpringApplicationBuilder().sources(DemoApplication.class).bannerMode(Banner.Mode.OFF).build(args).run();