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: devcloud:nacos:server-addr: xxx.xxx.xxx.xxx:8848  # Nacos 地址config:namespace: xxxxxxxxxxxxxxxxxxx  # 命名空间file-extension: yamlshared-configs:- data-id: shared-common.yamlrefresh: true  # 要开启刷新配置，下面的同理- data-id: shared-redis.yamlrefresh: true- data-id: shared-jdbc.yamlrefresh: true- data-id: shared-log.yamlrefresh: true- data-id: shared-swagger.yamlrefresh: true- data-id: shared-sentinel.yamlrefresh: truediscovery: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;}@EventListenerpublic 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));}}@EventListenerpublic void onRefreshScopeRefreshed(RefreshScopeRefreshedEvent event) {log.info("RefreshScope已刷新，Bean: {}", event.getName());}
}

控制台输出：