请问 nacos 2021.0.1.0版本怎么拿到NacosNamingService呢？

配置类中设计到的几个bean：NacosServiceRegistry 、NacosRegistration 、NacosAutoServiceRegistration 、AutoServiceRegistrationConfiguration

NacosServiceRegistry ： 实现服务的注册逻辑

NacosRegistration ： 通过 NacosRegistrationCustomizer 实现类定制化服务

NacosAutoServiceRegistration ： 服务启动后自动注册的入口

AutoServiceRegistrationConfiguration : 用于注册 AutoServiceRegistrationProperties``

@Configuration(proxyBeanMethods = false)
@EnableConfigurationProperties
@ConditionalOnNacosDiscoveryEnabled
# 默认开启服务自动注册
@ConditionalOnProperty(value = "spring.cloud.service-registry.auto-registration.enabled",
        matchIfMissing = true)
@AutoConfigureAfter({ AutoServiceRegistrationConfiguration.class,
        AutoServiceRegistrationAutoConfiguration.class,
        NacosDiscoveryAutoConfiguration.class })
public class NacosServiceRegistryAutoConfiguration {

    @Bean
    public NacosServiceRegistry nacosServiceRegistry(
            NacosDiscoveryProperties nacosDiscoveryProperties) {
        return new NacosServiceRegistry(nacosDiscoveryProperties);
    }

    @Bean
    @ConditionalOnBean(AutoServiceRegistrationProperties.class)
    public NacosRegistration nacosRegistration(
            ObjectProvider<List<NacosRegistrationCustomizer>> registrationCustomizers,
            NacosDiscoveryProperties nacosDiscoveryProperties,
            ApplicationContext context) {
        return new NacosRegistration(registrationCustomizers.getIfAvailable(),
                nacosDiscoveryProperties, context);
    }

    @Bean
    @ConditionalOnBean(AutoServiceRegistrationProperties.class)
    public NacosAutoServiceRegistration nacosAutoServiceRegistration(
            NacosServiceRegistry registry,
            AutoServiceRegistrationProperties autoServiceRegistrationProperties,
            NacosRegistration registration) {
        return new NacosAutoServiceRegistration(registry,
                autoServiceRegistrationProperties, registration);
    }

}

——参考链接。

Nacos 2021.0.1.0 版本中，您可以通过以下方式获取 NacosNamingService：

1. 首先，确保您的项目中已经添加了 Nacos 相关的依赖。对于 Maven 项目，您可以在 pom.xml 文件中添加以下依赖：

com.alibaba.nacos
nacos-client
2021.0.1.0

CopyCopy

1. 在您的项目中创建一个 Nacos 客户端实例，并初始化 Nacos 服务地址、应用名称、IP地址等信息。以下是一个创建 Nacos 客户端的示例：

import com.alibaba.nacos.api.annotation.NacosInjected;
import com.alibaba.nacos.api.naming.NamingService;
import com.alibaba.nacos.api.naming.client.DefaultNamingClient;
import com.alibaba.nacos.api.naming.client.NamingClient;
import com.alibaba.nacos.config.annotation.NacosInjected;
import com.alibaba.nacos.config.client.ConfigClient;
import com.alibaba.nacos.config.client.ConfigClientFactory;
import com.alibaba.nacos.config.server.config.annotation.ConfigInjected;
import com.alibaba.nacos.config.server.config.annotation.RefreshScope;
@RefreshScope
public class NacosClientHolder {
@NacosInjected
private NamingService namingService;
@NacosInjected
private ConfigClient configClient;
private static NacosClientHolder instance;
private NacosClientHolder() {
// 初始化 Nacos 客户端
NamingClient namingClient = new DefaultNamingClient("127.0.0.1:8848");
namingClient.setNamespaceId("public");
namingClient.setTimeout(3000);
namingService = namingClient;
// 初始化 ConfigClient
ConfigClientFactory configClientFactory = new ConfigClientFactory();
configClientFactory.setConfigServerAddr("127.0.0.1:8848");
configClientFactory.setTimeout(3000);
configClient = configClientFactory.getConfigClient();
}
public static NacosClientHolder getInstance() {
if (instance == null) {
synchronized (NacosClientHolder.class) {
if (instance == null) {
instance = new NacosClientHolder();
}
}
}
return instance;
}
public NamingService getNamingService() {
return namingService;
}
public ConfigClient getConfigClient() {
return configClient;
}
}
CopyCopy

1. 通过 NacosClientHolder 类的 getInstance() 方法获取 Nacos 客户端实例，然后调用 getNamingService() 方法获取 NacosNamingService。

NacosClientHolder nacosClientHolder = NacosClientHolder.getInstance();
NamingService namingService = nacosClientHolder.getNamingService();