如何使用Java开发一个基于微服务架构的应用系统

@SpringBootApplication
public class MainApplication {

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

@RestController
public class HelloController {

    @GetMapping("/hello")
    public String hello() {
        return "Hello, World!";
    }
}

@Configuration
public class ServiceDiscoveryConfig {

    @Bean
    public DiscoveryClient discoveryClient() {
        return new EurekaDiscoveryClient();
    }
}

@Configuration
public class LoadBalancerConfig {

    @Bean
    public LoadBalancer loadBalancer() {
        return new RoundRobinLoadBalancer();
    }
}

@Configuration
public class CircuitBreakerConfig {

    @Bean
    public CircuitBreaker circuitBreaker() {
        return new HystrixCircuitBreaker();
    }
}

FROM openjdk:8-jdk-alpine
COPY target/application.jar /app/
CMD ["java", "-jar", "/app/application.jar"]

$ docker build -t application .

$ docker run -p 8080:8080 application