Java 连接 ZooKeeper

导入依赖

    <dependencies>

        <dependency>
            <groupId>org.apache.zookeeper</groupId>
            <artifactId>zookeeper</artifactId>
            <version>3.6.0</version>
        </dependency>

        <dependency>
            <groupId>org.apache.curator</groupId>
            <artifactId>curator-recipes</artifactId>
            <version>4.0.1</version>
        </dependency>

        <dependency>
            <groupId>junit</groupId>
            <artifactId>junit</artifactId>
            <version>4.12</version>
            <scope>test</scope>
        </dependency>
    </dependencies>

编写连接 ZooKeeper 集群的工具类

package org.example;

import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.ExponentialBackoffRetry;

public class ZkUtil {

    public static CuratorFramework cf() {

        //间隔 3 秒，重试2次之后失败报错
        RetryPolicy retryPolicy = new ExponentialBackoffRetry(3000, 2);

        CuratorFramework cf = CuratorFrameworkFactory.builder()
                .connectString("192.168.137.200:2181,192.168.137.200:2182,192.168.137.200:2183")
                .retryPolicy(retryPolicy)
                .build();
        cf.start();
        return cf;
    }

}

测试

package org.example;

import org.apache.curator.framework.CuratorFramework;
import org.junit.Test;

public class Demo1 {

    @Test
    public void connect() {
        CuratorFramework cf = ZkUtil.cf();
    }
}