nocos注册中心使用教程

1.下载和安装

进入到官网下载就好了
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解压

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启动

2.新建提供者模块

2.1新建提供者模块cloudalibaba-provider-payment9001

2.1.1在父项目中新加入依赖

<dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-alibaba-dependencies</artifactId><version>2.1.0.RELEASE</version><type>pom</type><scope>import</scope>
</dependency>

2.1.2在cloudalibaba-provider-payment9001的pom中加入

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>cloud2020</artifactId><groupId>com.cao.springcloud</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>cloudalibaba-provider-payment9001</artifactId><dependencies><!--SpringCloud ailibaba nacos --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!-- SpringBoot整合Web组件 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--日常通用jar包配置--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><scope>runtime</scope><optional>true</optional></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies>
</project>

2.1.3yml写配置

server:port: 9001spring:application:name: nacos-payment-providercloud:nacos:discovery:server-addr: localhost:8848 #配置Nacos地址

2.1.4写主启动类、和Controller的代码

主启动类代码编写 @EnableDiscoveryClient

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;@EnableDiscoveryClient
@SpringBootApplication
public class PaymentMain9001 {public static void main(String[] args) {SpringApplication.run(PaymentMain9001.class, args);}
}

controller代码编写

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;/*** @author caowenbin* @Title: PaymentController* @Package com.cao.cloudalibaba* @Description: nacos_Controller* @date 2023/10/16 0:02*/
@RestController
public class PaymentController {@Value("${server.port}")private String serverPort;// http://localhost:9001/payment/nacos/1@GetMapping(value = "/payment/nacos/{id}")public String getPayment(@PathVariable("id") Integer id) {return "nacos registry, serverPort: " + serverPort + "\t id: " + id;}
}

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2.1.5测试

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2.2重复步骤2.1新建提供者cloudalibaba-provider-payment9002

同一个服务名下会出现两个实例
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查看详情：

2.2.1测试

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3.新建消费者模块cloudalibaba-consumer-nacos-order83

3.1pom文件加入依赖

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"><parent><artifactId>cloud2020</artifactId><groupId>com.cao.springcloud</groupId><version>1.0-SNAPSHOT</version></parent><modelVersion>4.0.0</modelVersion><artifactId>cloudalibaba-consumer-nacos-order83</artifactId><dependencies><!--SpringCloud ailibaba nacos --><dependency><groupId>com.alibaba.cloud</groupId><artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId></dependency><!-- 引入自己定义的api通用包，可以使用Payment支付Entity --><dependency><groupId>com.cao.springcloud</groupId><artifactId>cloud-api-commons</artifactId><version>${project.version}</version></dependency><!-- SpringBoot整合Web组件 --><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-actuator</artifactId></dependency><!--日常通用jar包配置--><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-devtools</artifactId><scope>runtime</scope><optional>true</optional></dependency><dependency><groupId>org.projectlombok</groupId><artifactId>lombok</artifactId><optional>true</optional></dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope></dependency></dependencies>
</project>

3.2yml写配置

server:port: 83spring:application:name: nacos-order-consumercloud:nacos:discovery:server-addr: localhost:8848#消费者将要去访问的微服务名称(注册成功进nacos的微服务提供者)
service-url:nacos-user-service: http://nacos-payment-provider

##3.3主启动类

 package com.cao.springcloud.alibaba;import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;@EnableDiscoveryClient
@SpringBootApplication
public class OrderNacosMain83
{public static void main(String[] args){SpringApplication.run(OrderNacosMain83.class,args);}
}

3.3负载均衡

import org.springframework.cloud.client.loadbalancer.LoadBalanced;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.web.client.RestTemplate;/*** 负载均衡LoadBalanced*/
@Configuration
public class ApplicationContextBean {@Bean@LoadBalancedpublic RestTemplate getRestTemplate() {return new RestTemplate();}
}

3.4controller

import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.RestController;
import org.springframework.web.client.RestTemplate;import javax.annotation.Resource;/*** 消费者83调用提供者9001或者9002*/
@RestController
public class OrderNacosController {@Resourceprivate RestTemplate restTemplate;//将之前固定的写法转成从配置文件中读取
//    private static final String SERVICE_URL = "http://nacos-payment-provider";@Value("${service-url.nacos-user-service}")private String serverURL;@GetMapping("/consumer/payment/nacos/{id}")public String paymentInfo(@PathVariable("id") Long id) {return restTemplate.getForObject(serverURL + "/payment/nacos/" + id, String.class);}}