import com.alibaba.cloud.nacos.NacosDiscoveryProperties;
import com.alibaba.cloud.nacos.registry.NacosRegistration;
import lombok.extern.slf4j.Slf4j;
import org.springframework.boot.CommandLineRunner;
import org.springframework.stereotype.Component;

import java.lang.reflect.Field;

/**
 * 實現CommandLineRunner 會在所有bean加載完畢之后執行
 *
 * @author bingbing
 * @date 2022/1/6 5:24 下午
 * @return
 */

@Component
@Slf4j
public class NacosInstanceInfoUtils implements CommandLineRunner {

    public static NacosDiscoveryProperties nacosDiscoveryProperties;

    private NacosRegistration nacosRegistration;

    public static String machineIp;


    /**
     *
     *  獲取當前機器注冊到nacos上的機器Ip
     * @author bingbing
     * @date 2022/3/11 6:15 下午
     * @return void
     */

    @Override
    public void run(String... args) throws Exception {
        log.info("getHostIp---------------------start-------------------------");

        nacosRegistration = SpringJobBeanFactory.getBean(NacosRegistration.class);
        Class cls1 = null;
        try {
            cls1 = Class.forName("com.alibaba.cloud.nacos.registry.NacosRegistration");
            Field field = cls1.getDeclaredField("nacosDiscoveryProperties");
            field.setAccessible(true);
            Object nacosDiscoveryPropertiesValue = field.get(nacosRegistration);
            this.nacosDiscoveryProperties = (NacosDiscoveryProperties) nacosDiscoveryPropertiesValue;
        } catch (Exception e) {
            e.printStackTrace();
            log.error("nacos Listen for the event message，reflection method has a problem");
        }
        machineIp = nacosDiscoveryProperties.getIp();
        log.info("getHostIp :{}--------------------end-------------------------",machineIp);

    }
}

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Component;

/**
* @ClassName: SpringJobBeanFactory*/
@Component
public class SpringJobBeanFactory implements ApplicationContextAware {

    
    private static ApplicationContext applicationContext;
    
    @Override
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        SpringJobBeanFactory.applicationContext=applicationContext;
        
    }
     public static ApplicationContext getApplicationContext() {
            return applicationContext;
    }
    @SuppressWarnings("unchecked")
    public static <T> T getBean(String name) throws BeansException {
            if (applicationContext == null){
                return null;
            }
            return (T)applicationContext.getBean(name);
      }
    
    public static <T> T getBean(Class<T>  name) throws BeansException {
            if (applicationContext == null){
                return null;
            }
            return applicationContext.getBean(name);
      }
}