【微服务】Nacos 配置动态刷新（简易版）（附配置）

1、实现方法

环境：Nacos、Java、SpringBoot等

主要是在boostrap.yaml中的data-id属性下配置refresh:true来实现动态更新

2、配置依赖 + yaml

具体的版本参考官方的说明：官方版本说明

 <!--读取bootstrap文件-->
 <dependency>
     <groupId>org.springframework.cloud</groupId>
     <artifactId>spring-cloud-starter-bootstrap</artifactId>
 </dependency>
 <!--统一配置管理-->
 <dependency>
     <groupId>com.alibaba.cloud</groupId>
     <artifactId>spring-cloud-starter-alibaba-nacos-config</artifactId>
 </dependency>
 <!--nacos 服务注册发现-->
 <dependency>
     <groupId>com.alibaba.cloud</groupId>
     <artifactId>spring-cloud-starter-alibaba-nacos-discovery</artifactId>
 </dependency>

boostrap.yaml 配置

spring:
  application:
    name: xxx-service # 微服务名称
  profiles:
    active: dev
  cloud:
    nacos:
      server-addr: xxx.xxx.xxx.xxx:8848  # Nacos 地址
      config:
        namespace: xxxxxxxxxxxxxxxxxxx  # 命名空间
        file-extension: yaml
        shared-configs:
          - data-id: shared-common.yaml
            refresh: true  # 要开启刷新配置，下面的同理
          - data-id: shared-redis.yaml
            refresh: true
          - data-id: shared-jdbc.yaml
            refresh: true
          - data-id: shared-log.yaml
            refresh: true
          - data-id: shared-swagger.yaml
            refresh: true
          - data-id: shared-sentinel.yaml
            refresh: true
      discovery:
        namespace: xxxxxxxxxxxxxxxx  # 命名空间

3、验证效果

配置监听，更新时打印配置到控制台

package com.lingchuangdao.creator.config;

import lombok.extern.slf4j.Slf4j;
import org.springframework.cloud.context.environment.EnvironmentChangeEvent;
import org.springframework.cloud.context.scope.refresh.RefreshScopeRefreshedEvent;
import org.springframework.context.event.EventListener;
import org.springframework.core.env.Environment;
import org.springframework.stereotype.Component;

import java.util.Set;

/**
 * 监听配置变更事件，并打印所有变更的属性。
 */
@Component
@Slf4j
public class ConfigRefreshListener {

    private final Environment environment;

    public ConfigRefreshListener(Environment environment) {
        this.environment = environment;
    }

    @EventListener
    public void onEnvironmentChangeEvent(EnvironmentChangeEvent event) {
        Set<String> keys = event.getKeys();
        log.info("配置已更新，变更的属性数量: {}", keys.size());
        
        // 打印所有变更的配置项
        for (String key : keys) {
            log.info("配置变更 - 属性: {}, 新值: {}", key, environment.getProperty(key));
        }
    }
    
    @EventListener
    public void onRefreshScopeRefreshed(RefreshScopeRefreshedEvent event) {
        log.info("RefreshScope已刷新，Bean: {}", event.getName());
    }
}

控制台输出：