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();