Spring Cloud Alibaba Nacos 配置中心 (配置持久化与动态刷新) 实战

@Configuration
public class NacosConfig {
 
    @Bean
    public ConfigService nacosConfigService() throws NacosException {
        Properties properties = new Properties();
        properties.put("serverAddr", System.getProperty("nacos.addr"));
        properties.put("namespace", System.getProperty("nacos.namespace"));
        properties.put("group", System.getProperty("nacos.group", "DEFAULT_GROUP"));
        return ConfigFactory.createConfigService(properties);
    }
 
    @Bean
    public NacosConfigManager nacosConfigManager() throws NacosException {
        Properties properties = new Properties();
        properties.put("serverAddr", System.getProperty("nacos.addr"));
        properties.put("namespace", System.getProperty("nacos.namespace"));
        return new NacosConfigManager(properties);
    }
 
    @Bean
    public NacosDiscoveryProperties nacosDiscoveryProperties() {
        NacosDiscoveryProperties nacosDiscoveryProperties = new NacosDiscoveryProperties();
        nacosDiscoveryProperties.setServerAddr(System.getProperty("nacos.addr"));
        nacosDiscoveryProperties.setNamespace(System.getProperty("nacos.namespace"));
        nacosDiscoveryProperties.setGroup(System.getProperty("nacos.group", "DEFAULT_GROUP"));
        return nacosDiscoveryProperties;
    }
 
    @Bean
    public NamingService nacosNamingService() throws NacosException {
        NamingFactory.init(nacosDiscoveryProperties());
        return NamingFactory.createNamingService(nacosDiscoveryProperties().getServerAddr());
    }
}

这个代码实例展示了如何在Spring Cloud Alibaba应用中配置Nacos作为配置中心，包括配置持久化和动态刷新的功能。通过配置ConfigService和NacosConfigManager Bean，应用可以从Nacos读取配置并在配置变更时自动更新。同时，也展示了如何配置Nacos作为服务注册中心，通过NamingService Bean与Nacos服务器进行交互。