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配置文件

application.yaml

server:servlet:context-path: /app  #项目名

controller

//注入到spring容器
@Controller
public class HelloController {@GetMapping("hello")@ResponseBodypublic String hello(){return "Hello,SpringBoot";}
}

启动项目

@SpringBootApplication
public class SpringbootDemo1Application {public static void main(String[] args) {SpringApplication.run(SpringbootDemo1Application.class, args);}}