30.nacos做注册中心入门实例（springcloud）

一、新建nacos-client-a

1.因为官方的springboot没有集成nacos的依赖，所以不再使用springboot的官方下载依赖地址

2. 因为我的idea是2019版本，更改了springboot下载路径后，不会自动更新，第一次选中依赖时，仍然时springboot官方的依赖选项，没有nacos依赖。因此，我首先创建了一个下载路径为aliyun的model，在该model初次加载之后（该model就没有用了，只是为了初次加载aliyun版本）。再创建model项目使用springboot的aliyun路径，就会自动适配aliyun的依赖选项。如下图所示

 3.配置好版本依赖，选择springboot 和 spring cloud alibaba 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 https://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0modelVersion>
    <groupId>com.itgroupId>
    <artifactId>nacos-client-aartifactId>
    <version>0.0.1-SNAPSHOTversion>
    <name>nacos-client-aname>
    <description>Demo project for Spring Bootdescription>
 
    <properties>
        <java.version>1.8java.version>
        <project.build.sourceEncoding>UTF-8project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8project.reporting.outputEncoding>
        <spring-boot.version>2.3.12.RELEASEspring-boot.version>
        <spring-cloud-alibaba.version>2.2.7.RELEASEspring-cloud-alibaba.version>
    properties>
 
    <dependencies>
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-webartifactId>
        dependency>
        <dependency>
            <groupId>com.alibaba.cloudgroupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discoveryartifactId>
        dependency>
 
        <dependency>
            <groupId>org.springframework.bootgroupId>
            <artifactId>spring-boot-starter-testartifactId>
            <scope>testscope>
            <exclusions>
                <exclusion>
                    <groupId>org.junit.vintagegroupId>
                    <artifactId>junit-vintage-engineartifactId>
                exclusion>
            exclusions>
        dependency>
    dependencies>
 
    <dependencyManagement>
        <dependencies>
            <dependency>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-dependenciesartifactId>
                <version>${spring-boot.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
            <dependency>
                <groupId>com.alibaba.cloudgroupId>
                <artifactId>spring-cloud-alibaba-dependenciesartifactId>
                <version>${spring-cloud-alibaba.version}version>
                <type>pomtype>
                <scope>importscope>
            dependency>
        dependencies>
    dependencyManagement>
 
    <build>
        <plugins>
            <plugin>
                <groupId>org.apache.maven.pluginsgroupId>
                <artifactId>maven-compiler-pluginartifactId>
                <version>3.8.1version>
                <configuration>
                    <source>1.8source>
                    <target>1.8target>
                    <encoding>UTF-8encoding>
                configuration>
            plugin>
            <plugin>
                <groupId>org.springframework.bootgroupId>
                <artifactId>spring-boot-maven-pluginartifactId>
                <version>2.3.7.RELEASEversion>
                <configuration>
                    <mainClass>com.it.NacosClientAApplicationmainClass>
                configuration>
                <executions>
                    <execution>
                        <id>repackageid>
                        <goals>
                            <goal>repackagegoal>
                        goals>
                    execution>
                executions>
            plugin>
        plugins>
    build>
 
project>

4.application.yml

server:
  port: 8080
spring:
  application:
    name: nacos-client-a
  cloud:
    nacos:
      server-addr: localhost:8848  #往这个地址去注册自己
      username: nacos
      password: nacos
 
 

5.NacosClientAApplication启动类

 

package com.it;
 
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
 
@SpringBootApplication
@EnableDiscoveryClient  //开启服务发现客户端，用来开启nacos
public class NacosClientAApplication {
 
    public static void main(String[] args) {
        SpringApplication.run(NacosClientAApplication.class, args);
    }
 
}

6.运行项目

7. 进入nacos管理端

二、新建nacos-client-b的model

1.创建过程与上面相同

2.在nacos管理端新建命名空间

3.application.yml

namespace指定上面创建命名空间的id

server:
  port: 8081
spring:
  application:
    name: nacos-client-b
  cloud:
    nacos:
      server-addr: localhost:8848
      username: nacos
      password: nacos
      discovery:  #这里是和注册相关的配置
        namespace: 3371e983-e359-4f37-aa27-d7d5b919fd2d
        group: A_GROUP  #往那个组注册

4.运行项目