SpringCloud alibaba 2.1.X (二) nacos1.X 注册中心多客户端实现(Common,WebFlux,RestTemplate,Feign)

偏执的太偏执、 2023-06-19 04:24 11阅读 0赞

# 1.项目父工程与server端 #

请参考 : [SpringCloud H系列 alibaba 2.1.1 (一) nacos1.X 注册中心 服务端][SpringCloud H_ alibaba 2.1.1_ nacos1.X _]

# 2.项目结构 #

*  Common  通过spring cloud common中的负载均衡接口选取服务提供节点实现接口调用
 *  WebFlux  通过 spring webflux  实现接口调用
 *  RestTemplate  通过 spring RestTemplate  实现接口调用
 *  Fegin  通过 spring openfeign 实现接口调用

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70][]

# 3.创建客户端子工程 alibaba-nacos-discovery-client #

pom.xml  工程文件

<parent>
            <groupId>com.alibaba</groupId>
            <artifactId>spring-cloud-hoxton</artifactId>
            <version>1.0</version>
        </parent>
    
        <artifactId>alibaba-nacos-discovery-client</artifactId>
        <version>1.0</version>
        <packaging>jar</packaging>
    
        <dependencies>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-webflux</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-starter-web</artifactId>
            </dependency>
            <dependency>
                <groupId>org.springframework.cloud</groupId>
                <artifactId>spring-cloud-starter-openfeign</artifactId>
            </dependency>
            <dependency>
                <groupId>com.alibaba.cloud</groupId>
                <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            </dependency>
        </dependencies>
    
    </project>

application.yml   配置文件

server:
      port: 9000
    spring:
      application:
        name: alibaba-nacos-discovery-client-webclient
      cloud:
        nacos:
          discovery:
            server-addr: 192.168.1.141:8848

TestApplication.java  启动类

@EnableDiscoveryClient  //启动注册中心客户端 注册到nacos
    @SpringBootApplication
    @EnableFeignClients     //开启Feign客户端
    public class TestApplication {
    
        public static void main(String[] args) {
            SpringApplication.run(TestApplication.class, args);
        }
    
    }

客户端需要根据服务名请求服务端的接口

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 1][]

### (1) Common 实现 ###

CommonController.java  服务端接口调用

@Slf4j
    @RestController
    public class CommonController {
    
        @Autowired
        LoadBalancerClient loadBalancerClient;
    
        @GetMapping("/testCommon")
        public String test() {
            ServiceInstance serviceInstance = loadBalancerClient.choose("alibaba-nacos-discovery-server");
            String url = serviceInstance.getUri() + "/test?name=common";
            RestTemplate restTemplate = new RestTemplate();
            String result = restTemplate.getForObject(url, String.class);
            return "返回数据 : " + result;
        }
    }

测试

![20191204200938575.png][]

成功

### (2) WebFlux 实现 ###

WebFluxConfig.java  配置类

@Configuration
    public class WebFluxConfig {
    
        @Bean
        @LoadBalanced
        public WebClient.Builder loadBalancedWebClientBuilder() {
            return WebClient.builder();
        }
    }

WebFluxController.java  服务端接口调用

@Slf4j
    @RestController
    public class WebFluxController {
    
        @Autowired
        private WebClient.Builder webClientBuilder;
    
        @GetMapping("/testWebFlux")
        public Mono<String> test() {
            Mono<String> result = webClientBuilder.build().get()
                    .uri("http://alibaba-nacos-discovery-server/test?name=webFlux")
                    .retrieve().bodyToMono(String.class);
            return result;
        }
    }

测试

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 2][]

成功

### (3) RestTemplate 实现 ###

RestTemplateConfig.java  配置类

@Configuration
    public class RestTemplateConfig {
    
        @Bean
        @LoadBalanced
        public RestTemplate restTemplate() {
            return new RestTemplate();
        }
    }

RestTemplateController.java  服务端接口调用

@Slf4j
    @RestController
    public class RestTemplateController {
    
        @Autowired
        private RestTemplate restTemplate;
    
        @GetMapping("/testRest")
        public String test() {
            String result = restTemplate.getForObject("http://alibaba-nacos-discovery-server/test?name=restTemplate", String.class);
            return "返回数据 : " + result;
        }
    }

测试

![20191204201516928.png][]

成功

### (4) Fegin 实现 ###

TestServiceFeign.java  调用服务端的接口

@FeignClient("alibaba-nacos-discovery-server")
    public interface TestServiceFeign {
    
        @GetMapping("/test")
        String hello(@RequestParam(name = "name") String name);
    
    }

FeginController.java  调用配置好的接口

@Slf4j
    @RestController
    public class FeignController {
    
        @Autowired
        private TestServiceFeign client;
    
        @GetMapping("/testFeign")
        public String test() {
            String result = client.hello("feign");
            return "返回数据 : " + result;
        }
    }

测试

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 3][]

成功

项目已上传到gitee

地址: [spring-cloud-alibaba-H-demo][]

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[SpringCloud H_ alibaba 2.1.1_ nacos1.X _]: https://blog.csdn.net/weixin_40461281/article/details/103384273
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[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20191204202106379.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ==,size_16,color_FFFFFF,t_70
[20191204200938575.png]: https://img-blog.csdnimg.cn/20191204200938575.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/2019120420131185.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ==,size_16,color_FFFFFF,t_70
[20191204201516928.png]: https://img-blog.csdnimg.cn/20191204201516928.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ_size_16_color_FFFFFF_t_70 3]: https://img-blog.csdnimg.cn/20191204201922319.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3dlaXhpbl80MDQ2MTI4MQ==,size_16,color_FFFFFF,t_70
[spring-cloud-alibaba-H-demo]: https://gitee.com/JavaLionLi/spring-cloud-alibaba-H-demo