Spring Boot: first demo

1. 生成Spring boot工程：https://start.spring.io/
   

   

   image.png

2. Deme(返回字符串、json串、配置server.port)

@Controller
@SpringBootApplication
public class Springbootlesson1Application {
    @RequestMapping("/")
    @ResponseBody
    String home(){
        return "Hello World!";
    }
    @RequestMapping("/rest")
    @ResponseBody
    Map rest(){
        Map ret = new HashMap<>();
        ret.put("1", "A");
        ret.put("2", 2);
        return ret;
    }
    public static void main(String[] args) {
        SpringApplication.run(Springbootlesson1Application.class, args);
    }
}

#application.properties
server.port=7001

启动日志

image.png

image.png

3. 配置management.port

#application.properties
management.port=8001

# pom.xml

    org.springframework.boot
    spring-boot-starter-actuator

image.png

image.png

image.png

jconsole

image.png

image.png