中间件 ZK分布式专题与Dubbo微服务入门 7-3 zk命名空间以及创建节点

0　　　　课程地址

https://coding.imooc.com/lesson/201.html#mid=12732

 

1　　　　重点关注

1.1　　　　本节内容

使用curator递归创建节点

 

1.2　　　　关键代码

//creatingParentsIfNeeded递归创建节点
//withMode 节点类型，永久or临时
//withACL 权限anyworld
//path 路径 ，前边加上工作空间 namespace
        String nodePath = "/super/imooc";
        byte[] data = "superme".getBytes();
        cto.client.create().creatingParentsIfNeeded()
            .withMode(CreateMode.PERSISTENT)
            .withACL(Ids.OPEN_ACL_UNSAFE)
            .forPath(nodePath, data);


create(){

        client = CuratorFrameworkFactory.builder()
                .connectString(zkServerPath)
                .sessionTimeoutMs(10000).retryPolicy(retryPolicy)
                .namespace("workspace").build();
}

 

 

 

2　　　　课程内容

 

 

3　　　　Coding

3.1　　　　Curator创建节点

• 启动服务端

    进入到
cd /usr/local/zookeeper/bin

 
    重启zookeeper服务端
./zkServer.sh restart

 

• 主类

package com.imooc.curator;

import java.util.List;

import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.framework.recipes.cache.ChildData;
import org.apache.curator.framework.recipes.cache.PathChildrenCache;
import org.apache.curator.framework.recipes.cache.PathChildrenCache.StartMode;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent;
import org.apache.curator.framework.recipes.cache.PathChildrenCacheListener;
import org.apache.curator.retry.RetryNTimes;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.ZooDefs.Ids;

public class CuratorOperator {

    public CuratorFramework client = null;
    public static final String zkServerPath = "172.26.139.4:2181";

    /**
     * 实例化zk客户端
     */
    public CuratorOperator() {
        /**
         * 同步创建zk示例，原生api是异步的
         * 
         * curator链接zookeeper的策略:ExponentialBackoffRetry
         * baseSleepTimeMs：初始sleep的时间
         * maxRetries：最大重试次数
         * maxSleepMs：最大重试时间
         */
//        RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 5);
        
        /**
         * curator链接zookeeper的策略:RetryNTimes
         * n：重试的次数
         * sleepMsBetweenRetries：每次重试间隔的时间
         */
        RetryPolicy retryPolicy = new RetryNTimes(3, 5000);
        
        /**
         * curator链接zookeeper的策略:RetryOneTime
         * sleepMsBetweenRetry:每次重试间隔的时间
         */
//        RetryPolicy retryPolicy2 = new RetryOneTime(3000);
        
        /**
         * 永远重试，不推荐使用
         */
//        RetryPolicy retryPolicy3 = new RetryForever(retryIntervalMs)
        
        /**
         * curator链接zookeeper的策略:RetryUntilElapsed
         * maxElapsedTimeMs:最大重试时间
         * sleepMsBetweenRetries:每次重试间隔
         * 重试时间超过maxElapsedTimeMs后，就不再重试
         */
//        RetryPolicy retryPolicy4 = new RetryUntilElapsed(2000, 3000);
        
        client = CuratorFrameworkFactory.builder()
                .connectString(zkServerPath)
                .sessionTimeoutMs(10000).retryPolicy(retryPolicy)
                .namespace("workspace").build();
        client.start();
    }
    
    /**
     * 
     * @Description: 关闭zk客户端连接
     */
    public void closeZKClient() {
        if (client != null) {
            this.client.close();
        }
    }
    
    public static void main(String[] args) throws Exception {
        // 实例化
        CuratorOperator cto = new CuratorOperator();
        boolean isZkCuratorStarted = cto.client.isStarted();
        System.out.println("当前客户的状态：" + (isZkCuratorStarted ? "连接中" : "已关闭"));
        
        // 创建节点
        String nodePath = "/super/imooc";
        byte[] data = "superme".getBytes();
        cto.client.create().creatingParentsIfNeeded()
            .withMode(CreateMode.PERSISTENT)
            .withACL(Ids.OPEN_ACL_UNSAFE)
            .forPath(nodePath, data);
        
        // 更新节点数据
//        byte[] newData = "batman".getBytes();
//        cto.client.setData().withVersion(0).forPath(nodePath, newData);
        
        // 删除节点
//        cto.client.delete()
//                  .guaranteed()                    // 如果删除失败，那么在后端还是继续会删除，直到成功
//                  .deletingChildrenIfNeeded()    // 如果有子节点，就删除
//                  .withVersion(0)
//                  .forPath(nodePath);
        
        
        
        // 读取节点数据
//        Stat stat = new Stat();
//        byte[] data = cto.client.getData().storingStatIn(stat).forPath(nodePath);
//        System.out.println("节点" + nodePath + "的数据为: " + new String(data));
//        System.out.println("该节点的版本号为: " + stat.getVersion());
        
        
        // 查询子节点
//        List<String> childNodes = cto.client.getChildren()
//                                            .forPath(nodePath);
//        System.out.println("开始打印子节点：");
//        for (String s : childNodes) {
//            System.out.println(s);
//        }
        
                
        // 判断节点是否存在,如果不存在则为空
//        Stat statExist = cto.client.checkExists().forPath(nodePath + "/abc");
//        System.out.println(statExist);
        
        
        // watcher 事件  当使用usingWatcher的时候，监听只会触发一次，监听完毕后就销毁
//        cto.client.getData().usingWatcher(new MyCuratorWatcher()).forPath(nodePath);
//        cto.client.getData().usingWatcher(new MyWatcher()).forPath(nodePath);
        
        // 为节点添加watcher
        // NodeCache: 监听数据节点的变更，会触发事件
//        final NodeCache nodeCache = new NodeCache(cto.client, nodePath);
//        // buildInitial : 初始化的时候获取node的值并且缓存
//        nodeCache.start(true);
//        if (nodeCache.getCurrentData() != null) {
//            System.out.println("节点初始化数据为：" + new String(nodeCache.getCurrentData().getData()));
//        } else {
//            System.out.println("节点初始化数据为空...");
//        }
//        nodeCache.getListenable().addListener(new NodeCacheListener() {
//            public void nodeChanged() throws Exception {
//                if (nodeCache.getCurrentData() == null) {
//                    System.out.println("空");
//                    return;
//                }
//                String data = new String(nodeCache.getCurrentData().getData());
//                System.out.println("节点路径：" + nodeCache.getCurrentData().getPath() + "数据：" + data);
//            }
//        });
        
        
        // 为子节点添加watcher
        // PathChildrenCache: 监听数据节点的增删改，会触发事件
//        String childNodePathCache =  nodePath;
//        // cacheData: 设置缓存节点的数据状态
//        final PathChildrenCache childrenCache = new PathChildrenCache(cto.client, childNodePathCache, true);
//        /**
//         * StartMode: 初始化方式
//         * POST_INITIALIZED_EVENT：异步初始化，初始化之后会触发事件
//         * NORMAL：异步初始化
//         * BUILD_INITIAL_CACHE：同步初始化
//         */
//        childrenCache.start(StartMode.POST_INITIALIZED_EVENT);
//        
//        List<ChildData> childDataList = childrenCache.getCurrentData();
//        System.out.println("当前数据节点的子节点数据列表：");
//        for (ChildData cd : childDataList) {
//            String childData = new String(cd.getData());
//            System.out.println(childData);
//        }
//        
//        childrenCache.getListenable().addListener(new PathChildrenCacheListener() {
//            public void childEvent(CuratorFramework client, PathChildrenCacheEvent event) throws Exception {
//                if(event.getType().equals(PathChildrenCacheEvent.Type.INITIALIZED)){
//                    System.out.println("子节点初始化ok...");
//                }
//                
//                else if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_ADDED)){
//                    String path = event.getData().getPath();
//                    if (path.equals(ADD_PATH)) {
//                        System.out.println("添加子节点:" + event.getData().getPath());
//                        System.out.println("子节点数据:" + new String(event.getData().getData()));
//                    } else if (path.equals("/super/imooc/e")) {
//                        System.out.println("添加不正确...");
//                    }
//                    
//                }else if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_REMOVED)){
//                    System.out.println("删除子节点:" + event.getData().getPath());
//                }else if(event.getType().equals(PathChildrenCacheEvent.Type.CHILD_UPDATED)){
//                    System.out.println("修改子节点路径:" + event.getData().getPath());
//                    System.out.println("修改子节点数据:" + new String(event.getData().getData()));
//                }
//            }
//        });
        
        Thread.sleep(3000);
        
        cto.closeZKClient();
        boolean isZkCuratorStarted2 = cto.client.isStarted();
        System.out.println("当前客户的状态：" + (isZkCuratorStarted2 ? "连接中" : "已关闭"));
    }
    
    public final static String ADD_PATH = "/super/imooc/d";
    
}

 

• 打印日志

2024-04-05 15:06:42,440 [main] [org.apache.curator.utils.Compatibility.<clinit>(Compatibility.java:41)] - [INFO] Running in ZooKeeper 3.4.x compatibility mode
2024-04-05 15:06:42,458 [main] [org.apache.curator.CuratorZookeeperClient.<init>(CuratorZookeeperClient.java:120)] - [WARN] session timeout [10000] is less than connection timeout [15000]
2024-04-05 15:06:42,469 [main] [org.apache.curator.framework.imps.CuratorFrameworkImpl.start(CuratorFrameworkImpl.java:284)] - [INFO] Starting
2024-04-05 15:06:42,477 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:zookeeper.version=3.4.11-37e277162d567b55a07d1755f0b31c32e93c01a0, built on 11/01/2017 18:06 GMT
2024-04-05 15:06:42,477 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:host.name=LAPTOP-BNI9B7NU
2024-04-05 15:06:42,478 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:java.version=17.0.10
2024-04-05 15:06:42,478 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:java.vendor=Eclipse Adoptium
2024-04-05 15:06:42,478 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:java.home=D:\java\develop\STS\anZh\sts-4.22.0.RELEASE\plugins\org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_17.0.10.v20240120-1143\jre
2024-04-05 15:06:42,478 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:java.class.path=D:\project\xin\zk_sts_imooc\imooc-zk-curator-maven\target\classes;C:\Users\18612\.m2\repository\org\apache\curator\curator-framework\4.0.0\curator-framework-4.0.0.jar;C:\Users\18612\.m2\repository\org\apache\curator\curator-client\4.0.0\curator-client-4.0.0.jar;C:\Users\18612\.m2\repository\com\google\guava\guava\20.0\guava-20.0.jar;C:\Users\18612\.m2\repository\org\apache\curator\curator-recipes\4.0.0\curator-recipes-4.0.0.jar;C:\Users\18612\.m2\repository\org\apache\zookeeper\zookeeper\3.4.11\zookeeper-3.4.11.jar;C:\Users\18612\.m2\repository\log4j\log4j\1.2.16\log4j-1.2.16.jar;C:\Users\18612\.m2\repository\jline\jline\0.9.94\jline-0.9.94.jar;C:\Users\18612\.m2\repository\org\apache\yetus\audience-annotations\0.5.0\audience-annotations-0.5.0.jar;C:\Users\18612\.m2\repository\io\netty\netty\3.10.5.Final\netty-3.10.5.Final.jar;C:\Users\18612\.m2\repository\joda-time\joda-time\2.5\joda-time-2.5.jar;C:\Users\18612\.m2\repository\org\apache\commons\commons-lang3\3.3.2\commons-lang3-3.3.2.jar;C:\Users\18612\.m2\repository\commons-io\commons-io\1.3.2\commons-io-1.3.2.jar;C:\Users\18612\.m2\repository\commons-net\commons-net\3.3\commons-net-3.3.jar;C:\Users\18612\.m2\repository\com\fasterxml\jackson\core\jackson-databind\2.7.4\jackson-databind-2.7.4.jar;C:\Users\18612\.m2\repository\com\fasterxml\jackson\core\jackson-core\2.7.4\jackson-core-2.7.4.jar;C:\Users\18612\.m2\repository\com\fasterxml\jackson\core\jackson-annotations\2.7.4\jackson-annotations-2.7.4.jar;C:\Users\18612\.m2\repository\org\apache\httpcomponents\httpclient\4.3.5\httpclient-4.3.5.jar;C:\Users\18612\.m2\repository\org\apache\httpcomponents\httpcore\4.3.2\httpcore-4.3.2.jar;C:\Users\18612\.m2\repository\commons-logging\commons-logging\1.1.3\commons-logging-1.1.3.jar;C:\Users\18612\.m2\repository\commons-codec\commons-codec\1.6\commons-codec-1.6.jar;C:\Users\18612\.m2\repository\org\mybatis\mybatis\3.2.8\mybatis-3.2.8.jar;C:\Users\18612\.m2\repository\org\mybatis\mybatis-spring\1.2.2\mybatis-spring-1.2.2.jar;C:\Users\18612\.m2\repository\com\github\miemiedev\mybatis-paginator\1.2.15\mybatis-paginator-1.2.15.jar;C:\Users\18612\.m2\repository\com\github\pagehelper\pagehelper\4.1.3\pagehelper-4.1.3.jar;C:\Users\18612\.m2\repository\com\github\jsqlparser\jsqlparser\0.9.4\jsqlparser-0.9.4.jar;C:\Users\18612\.m2\repository\mysql\mysql-connector-java\5.1.41\mysql-connector-java-5.1.41.jar;C:\Users\18612\.m2\repository\com\alibaba\druid\1.1.0\druid-1.1.0.jar;C:\Users\18612\.m2\repository\org\springframework\spring-core\4.3.3.RELEASE\spring-core-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-context\4.3.3.RELEASE\spring-context-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-aop\4.3.3.RELEASE\spring-aop-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-expression\4.3.3.RELEASE\spring-expression-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-context-support\4.3.3.RELEASE\spring-context-support-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-beans\4.3.3.RELEASE\spring-beans-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-webmvc\4.3.3.RELEASE\spring-webmvc-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-web\4.3.3.RELEASE\spring-web-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-jdbc\4.3.3.RELEASE\spring-jdbc-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-tx\4.3.3.RELEASE\spring-tx-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\springframework\spring-aspects\4.3.3.RELEASE\spring-aspects-4.3.3.RELEASE.jar;C:\Users\18612\.m2\repository\org\aspectj\aspectjweaver\1.8.9\aspectjweaver-1.8.9.jar;C:\Users\18612\.m2\repository\jstl\jstl\1.2\jstl-1.2.jar;C:\Users\18612\.m2\repository\javax\servlet\servlet-api\2.5\servlet-api-2.5.jar;C:\Users\18612\.m2\repository\javax\servlet\jsp-api\2.0\jsp-api-2.0.jar;C:\Users\18612\.m2\repository\commons-fileupload\commons-fileupload\1.3.1\commons-fileupload-1.3.1.jar;C:\Users\18612\.m2\repository\redis\clients\jedis\2.8.0\jedis-2.8.0.jar;C:\Users\18612\.m2\repository\org\apache\commons\commons-pool2\2.3\commons-pool2-2.3.jar;C:\Users\18612\.m2\repository\org\apache\solr\solr-solrj\4.10.3\solr-solrj-4.10.3.jar;C:\Users\18612\.m2\repository\org\apache\httpcomponents\httpmime\4.3.1\httpmime-4.3.1.jar;C:\Users\18612\.m2\repository\org\codehaus\woodstox\wstx-asl\3.2.7\wstx-asl-3.2.7.jar;C:\Users\18612\.m2\repository\org\noggit\noggit\0.5\noggit-0.5.jar;C:\Users\18612\.m2\repository\commons-httpclient\commons-httpclient\3.1\commons-httpclient-3.1.jar;C:\Users\18612\.m2\repository\org\slf4j\slf4j-api\1.7.21\slf4j-api-1.7.21.jar;C:\Users\18612\.m2\repository\org\slf4j\slf4j-log4j12\1.7.21\slf4j-log4j12-1.7.21.jar
2024-04-05 15:06:42,478 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:java.library.path=D:\java\develop\STS\anZh\sts-4.22.0.RELEASE\plugins\org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_17.0.10.v20240120-1143\jre\bin;C:\WINDOWS\Sun\Java\bin;C:\WINDOWS\system32;C:\WINDOWS;D:/java/develop/STS/anZh/sts-4.22.0.RELEASE//plugins/org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_17.0.10.v20240120-1143/jre/bin/server;D:/java/develop/STS/anZh/sts-4.22.0.RELEASE//plugins/org.eclipse.justj.openjdk.hotspot.jre.full.win32.x86_64_17.0.10.v20240120-1143/jre/bin;D:\java\transport\secureCRT\anZh\;C:\Windows\system32;C:\Windows;C:\Windows\System32\Wbem;C:\Windows\System32\WindowsPowerShell\v1.0\;C:\Windows\System32\OpenSSH\;C:\Program Files (x86)\NVIDIA Corporation\PhysX\Common;C:\Program Files\NVIDIA Corporation\NVIDIA NvDLISR;C:\Program Files\Git\cmd;C:\Users\18612\.dnx\bin;C:\Program Files\Microsoft DNX\Dnvm\;C:\Program Files\Microsoft SQL Server\120\Tools\Binn\;C:\Program Files (x86)\nodejs\;C:\Program Files (x86)\Windows Kits\10\Windows Performance Toolkit\;C:\Program Files (x86)\QuickTime\QTSystem\;C:\WINDOWS\system32;C:\WINDOWS;C:\WINDOWS\System32\Wbem;C:\WINDOWS\System32\WindowsPowerShell\v1.0\;C:\WINDOWS\System32\OpenSSH\;C:\Program Files\MySQL\MySQL Shell 8.0\bin\;C:\Users\18612\AppData\Local\Programs\Python\Python35\Scripts\;C:\Users\18612\AppData\Local\Programs\Python\Python35\;C:\Users\18612\AppData\Local\Microsoft\WindowsApps;D:\java\envir\jdk1.8\anZh\bin;D:\java\envir\jdk1.8\anZh\jre\bin;D:\Python\Fiddle\anZh;C:\Users\18612\AppData\Roaming\npm;C:\Program Files (x86)\Windows Kits\10\Include\10.0.22000.0\ucrt;C:\Program Files (x86)\Tencent\QQGameTempest\Hall.57795\;C:\Users\18612\AppData\Local\Microsoft\WindowsApps;D:\java\maven\apache-maven-3.8.2\bin;;D:\java\develop\STS\anZh\sts-4.22.0.RELEASE;;.
2024-04-05 15:06:42,479 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:java.io.tmpdir=C:\Users\18612\AppData\Local\Temp\
2024-04-05 15:06:42,479 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:java.compiler=<NA>
2024-04-05 15:06:42,479 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:os.name=Windows 11
2024-04-05 15:06:42,479 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:os.arch=amd64
2024-04-05 15:06:42,479 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:os.version=10.0
2024-04-05 15:06:42,479 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:user.name=18612
2024-04-05 15:06:42,481 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:user.home=C:\Users\18612
2024-04-05 15:06:42,482 [main] [org.apache.zookeeper.Environment.logEnv(Environment.java:100)] - [INFO] Client environment:user.dir=D:\project\xin\zk_sts_imooc\imooc-zk-curator-maven
2024-04-05 15:06:42,482 [main] [org.apache.zookeeper.ZooKeeper.<init>(ZooKeeper.java:441)] - [INFO] Initiating client connection, connectString=172.26.139.4:2181 sessionTimeout=10000 watcher=org.apache.curator.ConnectionState@5158b42f
2024-04-05 15:06:42,604 [main-SendThread(172.26.139.4:2181)] [org.apache.zookeeper.ClientCnxn$SendThread.logStartConnect(ClientCnxn.java:1035)] - [INFO] Opening socket connection to server 172.26.139.4/172.26.139.4:2181. Will not attempt to authenticate using SASL (unknown error)
2024-04-05 15:06:42,604 [main] [org.apache.curator.framework.imps.CuratorFrameworkImpl.start(CuratorFrameworkImpl.java:326)] - [INFO] Default schema
当前客户的状态：连接中
2024-04-05 15:06:42,608 [main-SendThread(172.26.139.4:2181)] [org.apache.zookeeper.ClientCnxn$SendThread.primeConnection(ClientCnxn.java:877)] - [INFO] Socket connection established to 172.26.139.4/172.26.139.4:2181, initiating session
2024-04-05 15:06:42,615 [main-SendThread(172.26.139.4:2181)] [org.apache.zookeeper.ClientCnxn$SendThread.onConnected(ClientCnxn.java:1302)] - [INFO] Session establishment complete on server 172.26.139.4/172.26.139.4:2181, sessionid = 0x10016d7df88001b, negotiated timeout = 10000
2024-04-05 15:06:42,620 [main-EventThread] [org.apache.curator.framework.state.ConnectionStateManager.postState(ConnectionStateManager.java:237)] - [INFO] State change: CONNECTED
2024-04-05 15:06:42,640 [main] [org.apache.curator.utils.ZKPaths$CreateModeHolder.<clinit>(ZKPaths.java:76)] - [WARN] The version of ZooKeeper being used doesn't support Container nodes. CreateMode.PERSISTENT will be used instead.
2024-04-05 15:06:45,666 [Curator-Framework-0] [org.apache.curator.framework.imps.CuratorFrameworkImpl.backgroundOperationsLoop(CuratorFrameworkImpl.java:924)] - [INFO] backgroundOperationsLoop exiting
2024-04-05 15:06:45,670 [main] [org.apache.zookeeper.ZooKeeper.close(ZooKeeper.java:687)] - [INFO] Session: 0x10016d7df88001b closed
当前客户的状态：已关闭

 

• linux客户端查看是否创建节点

--linux客户端连接服务端
./zkCli.sh

--查看工作空间是否创建
[zk: localhost:2181(CONNECTED) 5] ls /
[imooc-fake, workspace, imooc2, names, zookeeper, imooc3, aclimooc, imooc, testnode, imooc5]

--查看节点是否创建
[zk: localhost:2181(CONNECTED) 6] ls /workspace/super/imooc
[]

--查看节点信息
[zk: localhost:2181(CONNECTED) 7] get /workspace/super/imooc
superme
cZxid = 0xc3
ctime = Fri Apr 05 15:06:42 CST 2024
mZxid = 0xc3
mtime = Fri Apr 05 15:06:42 CST 2024
pZxid = 0xc3
cversion = 0
dataVersion = 0
aclVersion = 0
ephemeralOwner = 0x0
dataLength = 7
numChildren = 0