一、首先添加nacos注册发现的pom依赖

com.alibaba.boot

nacos-discovery-spring-boot-starter

0.2.3

二、application.properties文件中添加nacos的配置

nacos.discovery.server-addr=你的nacos地址:你的nacos端口

三、在项目启动类中添加配置，启动时向nacos注册服务

@NacosInjectedprivateNamingService namingService;

@Value("${spring.application.name}")privateString applicationName;

@PostConstructpublic void registerInstance() throwsNacosException {

namingService.registerInstance(applicationName,"127.0.0.1",9193);

}

以上就是spring boot 的注册方式，比较简单，项目启动后注册成功

但是在第一次配置的时候发生了一些问题，项目启动报错：注册失败，然后追踪

namingService.registerInstance方法的源码，发现是调用httpclient注册的时候报错，源码中有一部分代码如下：

public String callServer(String api, Map params, String curServer, String method) throwsNacosException {

List headers = Arrays.asList("Client-Version", "Nacos-Java-Client:v0.2.1", "Accept-Encoding", "gzip,deflate,sdch", "Connection", "Keep-Alive", "RequestId", UuidUtil.generateUuid());if (!curServer.contains(":")) {

curServer= curServer + ":" + 8848;

}

String url= HttpClient.getPrefix() + curServer +api;

HttpResult result= HttpClient.request(url, headers, params, "UTF-8", method);if (200 ==result.code) {returnresult.content;

}else if (304 ==result.code) {return "";

}else{

LogUtils.LOG.error("CALL-SERVER", "failed to req API:" + HttpClient.getPrefix() + curServer + api + ". code:" + result.code + " msg: " +result.content);throw new NacosException(500, "failed to req API:" + HttpClient.getPrefix() + curServer + api + ". code:" + result.code + " msg: " +result.content);

}

}

发现，http接口的返回结果报错：cluster name can only have these characters: 0-9a-zA-Z-

查了很多资料发现是pom引入的版本问题，改为最新版本，注册成功