java springboot zookeeper curator 监听

<dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-framework</artifactId>
            <version>4.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-client</artifactId>
            <version>4.3.0</version>
        </dependency>
        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.3.0</version>
        </dependency>

public class ZookeeperHelper {
    /**
     * 可以写多个地址，逗号分隔
     */
    private static final String zkServerIps = "127.0.0.1:2181";
    private static RetryPolicy retryPolicy = new ExponentialBackoffRetry(
            1000,
            3);
    /**
     * 实