Nacos启动服务发现-SpringCloud(2)

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前言

官方案例的笔记

Nacos官方文档#启动服务发现

时间线——2021-04-19—
启动报错：hibernate-validator ，去掉 pom.xml的 hibernate-validator，去掉 spring-boot-starter-web 中的 hibernate-validator

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><dependency>
 <groupId>org.springframework.boot</groupId>
 <artifactId>spring-boot-starter-web</artifactId>
    <exclusions>
        <exclusion>
            <artifactId>hibernate-validator</artifactId>
            <groupId>org.hibernate.validator</groupId>
        </exclusion>
    </exclusions>
   </dependency>

实现

依赖

provider

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<dependencies>
            <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>hibernate-validator</artifactId>
                    <groupId>org.hibernate.validator</groupId>
                </exclusion>
            </exclusions>
        </dependency>
    <dependency>
        <groupId>com.alibaba.cloud</groupId>
        <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        <version>0.2.2.RELEASE</version>
        <exclusions>
            <exclusion>
                <groupId>com.alibaba.nacos</groupId>
                <artifactId>nacos-client</artifactId>
            </exclusion>
        </exclusions>
    </dependency>
    <dependency>
        <groupId>com.alibaba.nacos</groupId>
        <artifactId>nacos-client</artifactId>
        <version>1.1.0</version>
    </dependency>
</dependencies>

consumer

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<dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
            <exclusions>
                <exclusion>
                    <artifactId>hibernate-validator</artifactId>
                    <groupId>org.hibernate.validator</groupId>
                </exclusion>
            </exclusions>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-ribbon</artifactId>
            <version>${spring-cloud-netflix.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-openfeign</artifactId>
            <version>${spring-cloud-openfeign.version}</version>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
            <exclusions>
                <exclusion>
                    <groupId>com.alibaba.nacos</groupId>
                    <artifactId>nacos-client</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.alibaba.nacos</groupId>
            <artifactId>nacos-client</artifactId>
        </dependency>
    </dependencies>

版本说明 Wiki

打不开 github 的版本参考Nacos启动配置管理-SpringCloud(1)

配置

provider:port=8070

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server.port=8070
spring.application.name=service-provider
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

consumer:port=8080

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server.port=8080
spring.application.name=service-consumer
spring.cloud.nacos.discovery.server-addr=127.0.0.1:8848

代码

provider

通过 Spring Cloud 原生注解 @EnableDiscoveryClient 开启服务注册发现功能。

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@SpringBootApplication
@EnableDiscoveryClient
public class NacosProviderApplication {

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

	@RestController
	class EchoController {
		@RequestMapping(value = "/echo/{string}", method = RequestMethod.GET)
		public String echo(@PathVariable String string) {
			return "Hello Nacos Discovery " + string;
		}
	}
}

consumer

通过 Spring Cloud 原生注解 @EnableDiscoveryClient 开启服务注册发现功能。给 RestTemplate 实例添加 @LoadBalanced 注解，开启 @LoadBalanced 与 Ribbon 的集成：

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@SpringBootApplication
@EnableDiscoveryClient
public class NacosConsumerApplication {
    @LoadBalanced
    @Bean
    public RestTemplate restTemplate() {
        return new RestTemplate();
    }
    public static void main(String[] args) {
        SpringApplication.run(NacosConsumerApplication.class, args);
    }

    @RestController
    public class TestController {

        private final RestTemplate restTemplate;

        @Autowired
        public TestController(RestTemplate restTemplate) {this.restTemplate = restTemplate;}

        @RequestMapping(value = "/echo/{str}", method = RequestMethod.GET)
        public String echo(@PathVariable String str) {
            return restTemplate.getForObject("http://service-provider/echo/" + str, String.class);
        }
    }
}

测试

启动 ProviderApplication 和 ConsumerApplication ，调用 http://localhost:8080/echo/2018，返回内容为 Hello Nacos Discovery 2018。

本文地址： https://github.com/maxzhao-it/blog/post/49625/