The final part of our application is the main method. This is just a standard method that follows the Java convention for an application entry point. Our main method delegates to Spring Boot’s SpringApplication class by calling run. SpringApplication bootstraps our application, starting Spring, which, in turn, starts the auto-configured Tomcat web server. We need to pass Example.class as an argument to the run method to tell SpringApplication which is the primary Spring component. The args array is also passed through to expose any command-line arguments. 應用程序最后部分是 main方法。 這僅僅是一個標準方法，它遵循Java應用程序進入點的規(guī)范。 我們的main方法通過調用 run來委托SpringBoot的SpringApplication類。 SpringApplication引導啟動應用程序，從Spring開始，依次啟動自動配置的Tomcat Web服務器。 我們需要將 Example.class作為一個參數(shù)傳遞給 run 方法來告訴SpringApplication哪個是主要的Spring組件。（main方法）args數(shù)組同樣被傳遞暴露于任意命令行的參數(shù)。