23. SpringApplication

SpringApplication类提供了一种快捷方式，用于从main()方法启动Spring应用。多数情况下，你只需要将该任务委托给SpringApplication.run静态方法：

  1. public static void main(String[] args){
  2.     SpringApplication.run(MySpringConfiguration.class, args);
  3. }

当应用启动时，你应该会看到类似下面的东西：

  1. .   ____          _            __ _ _
  2.  /\\ / ___'_ __ _ _(_)_ __  __ _ \ \ \ \
  3. ( ( )\___ | '_ | '_| | '_ \/ _` | \ \ \ \
  4.  \\/  ___)| |_)| | | | | || (_| |  ) ) ) )
  5.   '  |____| .__|_| |_|_| |_\__, | / / / /
  6.  =========|_|==============|___/=/_/_/_/
  7.  :: Spring Boot ::   v1.4.1.RELEASE
  9. 2013-07-31 00:08:16.117  INFO 56603 --- [           main] o.s.b.s.app.SampleApplication            : Starting SampleApplication v0.1.0 on mycomputer with PID 56603 (/apps/myapp.jar started by pwebb)
  10. 2013-07-31 00:08:16.166  INFO 56603 --- [           main] ationConfigEmbeddedWebApplicationContext : Refreshing org.springframework.boot.context.embedded.AnnotationConfigEmbeddedWebApplicationContext@6e5a8246: startup date [Wed Jul 31 00:08:16 PDT 2013]; root of context hierarchy
  11. 2014-03-04 13:09:54.912  INFO 41370 --- [           main] .t.TomcatEmbeddedServletContainerFactory : Server initialized with port: 8080
  12. 2014-03-04 13:09:56.501  INFO 41370 --- [           main] o.s.b.s.app.SampleApplication            : Started SampleApplication in 2.992 seconds (JVM running for 3.658)

默认情况下会显示INFO级别的日志信息，包括一些相关的启动详情，比如启动应用的用户等。