nacos文档地址：https://nacos.io/en-us/docs/quick-start-spring-cloud.html
1.引入pom依赖
<dependency>
<groupId>com.alibaba.cloud</groupId>
<artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
<version>2.2.1.RELEASE</version>
</dependency>
2.在application.properties或者application.yml里面进行配置
spring.cloud.nacos.config.server-addr=127.0.0.1:8848
spring.application.name=example
3.在启动类上加入注解
@EnableDiscoveryClient
4.下载nacos server服务端并进行解压启动
下载地址：https://github.com/alibaba/nacos/releases
5.访问http://127.0.0.1:8848/nacos，用户名和地址都是nacos
