8.在Spring Boot中如何使用Nacos 注册中心

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发布于 2023-08-18 12:44:41

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发布于 2023-08-18 12:44:41

文章被收录于专栏：分布式｜微服务｜性能优化｜并发编程｜源码分析分布式｜微服务｜性能优化｜并发编程｜源码分析

由于Nacos 暂时不支持SpringBoot3.0 自动注册,所以集成SpringBoot时，暂且用SpringBoot2.7.7

引入依赖

dependencies {
   implementation 'org.springframework.boot:spring-boot-starter'
   implementation 'org.springframework.boot:spring-boot-starter-web'
   implementation 'com.alibaba.boot:nacos-discovery-spring-boot-starter:0.2.12'
}

添加配置文件

nacos:
 discovery:
   serverAddr: 192.168.64.2:8848
   autoRegister: true
   register:
     groupName: test_group
     serviceName: day01
spring:
 application:
   name: day01
server:
 port: 8080

创建一个API 获取服务实例和注册服务实例

package cpm.lglbc.day01;

import com.alibaba.nacos.api.annotation.NacosInjected;
import com.alibaba.nacos.api.exception.NacosException;
import com.alibaba.nacos.api.naming.NamingService;
import com.alibaba.nacos.api.naming.pojo.Instance;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.RestController;

import java.util.List;

/**
 * @Author 乐哥聊编程
 * @Doc 关注公众号"乐哥聊编程"获取文档和源码
 * @Date 2023/5/21
 * @Description
 */
@RestController("/")
public class IndexController {
    @Value("${server.port}")
    private int port;
    @Value("${spring.application.name}")
    private String app;
    @NacosInjected
    private NamingService namingService;

    @GetMapping("/getAllInstances")
    public List<Instance> getAllInstances() throws NacosException {
        return namingService.getAllInstances("day01", "test_group");
    }

    @RequestMapping("/createService")
    public List<Instance> createService() throws Exception {
        namingService.registerInstance(app, "test_group","127.0.0.1",port);
        return getAllInstances();
    }
}

启动服务

打印日志如下，说明服务注册成功

打开控制台

验证服务获取

关闭自动注册，使用手动注册服务

nacos:
 discovery:
   serverAddr: 192.168.64.2:8848
   autoRegister: false
   register:
     groupName: test_group
     serviceName: day01
spring:
 application:
   name: day01
server:
 port: 8080