需要了解微服务架构是如何工作的

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

@RestController
public class HelloController {
    @GetMapping("/hello")
    public String sayHello() {
        return "Hello from Provider!";
    }
}

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

@RestController
public class ConsumerController {
    @Autowired
    private RestTemplate restTemplate;

    @GetMapping("/consume")
    public String consume() {
        return restTemplate.getForObject("http://provider/hello", String.class);
    }
}

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