使用nacos作为注册中心

nacos的简单安装

在github上下载部署的包 ，地址：github.com/alibaba/nac… 选择自己需要的版本，我使用的版本是 1.4.1 。

在windows下安装 ：

1. 把压缩包解压到指定目录， 如我解压位置 C:\dev\nacos
2. 进入 bin 目录，修改startup.cmd (我的是window机器，如果是macos ， 是 startup.sh )

将启动模式改为单机模式 ：

在项目中使用nacos

spring-cloud-alibaba 已经整合有nacos，我们直接使用即可。
首先是要引入依赖 ， maven 配置如下

maven 配置

<?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">
    <modelVersion>4.0.0</modelVersion>

    <groupId>org.example</groupId>
    <artifactId>spring-cloud-study</artifactId>
    <packaging>pom</packaging>
    <version>1.0-SNAPSHOT</version>
    <modules>
        <module>order</module>
        <module>web</module>
    </modules>
    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.1.11.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>
    <properties>
        <java.version>1.8</java.version>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    </properties>
    <dependencyManagement>
      <dependencies>
          <dependency>
              <groupId>org.springframework.cloud</groupId>
              <artifactId>spring-cloud-dependencies</artifactId>
              <version>Greenwich.SR4</version>
              <type>pom</type>
              <scope>import</scope>
          </dependency>
          <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>
      </dependencies>


  </dependencyManagement>

    <dependencies>
        <dependency>
            <groupId>org.projectlombok</groupId>
            <artifactId>lombok</artifactId>
        </dependency>
       
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>com.alibaba.cloud</groupId>
            <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
        </dependency>

        
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>org.springframework.boot</groupId>
                <artifactId>spring-boot-maven-plugin</artifactId>
            </plugin>
        </plugins>
    </build>

</project>

spring boot 配置连接nacos

spring:
  application:
    name: demo
  cloud:
    nacos:
      discovery:
        server-addr: 127.0.0.1:8848

spring boot 启动类配置

@SpringBootApplication
@EnableDiscoveryClient  //启动服务注册与发现
public class OrderApplication {

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

}