dubbo：dubbo+nacos整合springcloud gateway实现网关

在Spring Cloud Gateway中使用Dubbo和Nacos进行服务治理，你需要做以下几个步骤：

1. 引入必要的依赖：

<!-- Spring Cloud Gateway -->
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-gateway</artifactId>
</dependency>
<!-- Dubbo Spring Cloud Starter -->
<dependency>
    <groupId>com.alibaba.cloud</groupId>
    <artifactId>spring-cloud-starter-dubbo</artifactId>
</dependency>
<!-- Nacos Client -->
<dependency>
    <groupId>com.alibaba.nacos</groupId>
    <artifactId>nacos-client</artifactId>
</dependency>

2. 配置application.yml文件：

spring:
  cloud:
    gateway:
      routes:
        - id: dubbo_service_route
          uri: lb://dubbo-service-provider
          predicates:
            - Path=/dubbo-service/**
          filters:
            - DedupeResponseHeader=Access-Control-Allow-Origin
            - name: Dubbo
              args:
                registry: "nacos"
                timeout: 6000
                version: "1.0.0"
                group: "DEFAULT_GROUP"
                protocol: "dubbo"
                interface: "com.example.DubboService"
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

3. 配置Dubbo服务消费者：

@Configuration
public class DubboConfiguration {
 
    @Bean
    public ApplicationContextInitializer<ConfigurableApplicationContext> dubboApplicationContextInitializer() {
        return context -> {
            ConfigurableEnvironment environment = context.getEnvironment();
            String dubboRegistry = environment.getProperty("spring.cloud.nacos.discovery.server-addr");
            // 设置Dubbo注册中心地址
            System.setProperty("dubbo.registry.address", dubboRegistry);
            // 设置Dubbo协议名称
            System.setProperty("dubbo.protocol.name", "dubbo");
            // 设置Dubbo版本
            System.setProperty("dubbo.version", "1.0.0");
            // 设置Dubbo群组
            System.setProperty("dubbo.group", "DEFAULT_GROUP");
        };
    }
}

4. 使用Dubbo服务：

@RestController
public class DubboConsumerController {
 
    @Reference
    private DubboService dubboService;
 
    @GetMapping("/dubbo-service/{message}")
    public String dubboService(@PathVariable String message) {
        return dubboService.sayHello(message);
    }
}

以上步骤展示了如何在Spring Cloud Gateway中使用Dubbo和Nacos进行服务的注册与发现。你需要将DubboService替换为你的具体Dubbo服务接口，并确保Nacos服务器地址和Dubbo服务提供者接口配置正确。