SpringCloud实用篇02【Nacos配置管理+集群搭建+Feign远程调用+GateWay服务网关】

以下是一个简化的示例，展示了如何使用Spring Cloud Alibaba Nacos作为配置中心和服务注册中心，以及如何使用Feign进行远程调用和使用Gateway作为服务网关。

// 引入相关依赖
<dependencies>
    <!-- Spring Cloud Alibaba Nacos Discovery -->
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
    </dependency>
    <!-- Spring Cloud Alibaba Nacos Config -->
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
    </dependency>
    <!-- Feign Client -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-openfeign</artifactId>
    </dependency>
    <!-- Spring Cloud Gateway -->
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-gateway</artifactId>
    </dependency>
</dependencies>
 
// Nacos配置管理application.properties
spring.application.name=nacos-config-demo
spring.cloud.nacos.config.server-addr=127.0.0.1:8848
 
// Nacos服务注册application.properties
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848
 
// Feign客户端接口定义
@FeignClient("nacos-provider")
public interface ProviderClient {
    @GetMapping("/hello")
    String hello();
}
 
// 使用Feign的服务消费者
@RestController
public class ConsumerController {
    @Autowired
    private ProviderClient providerClient;
 
    @GetMapping("/hello")
    public String hello() {
        return providerClient.hello();
    }
}
 
// Gateway路由配置
@Configuration
public class GatewayConfig {
    @Bean
    public RouteLocator customRouteLocator(RouteLocator routeLocator) {
        return routeLocator.routes()
                .route("path_route", r -> r.path("/provider/**")
                        .filters(f -> f.stripPrefix(1))
                        .uri("lb://nacos-provider")
                        .order(0)
                )
                .build();
    }
}
 
// 服务提供者启动类
@SpringBootApplication
@EnableDiscoveryClient
public class ProviderApplication {
    public static void main(String[] args) {
        SpringApplication.run(ProviderApplication.class, args);
    }
}
 
// 服务消费者启动类
@SpringBootApplication
@EnableDiscoveryClient
@EnableFeignClients
public class ConsumerApplication {
    public static void main(String[] args) {