引入Jar包

<dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-web</artifactId>
</dependency><dependency><groupId>org.springframework.boot</groupId><artifactId>spring-boot-starter-test</artifactId><scope>test</scope>
</dependency><dependency><groupId>org.apache.zookeeper</groupId><artifactId>zookeeper</artifactId><version>3.4.13</version>
</dependency><dependency><groupId>org.apache.curator</groupId><artifactId>curator-recipes</artifactId><version>4.1.0</version><exclusions><exclusion><groupId>org.apache.zookeeper</groupId><artifactId>zookeeper</artifactId></exclusion></exclusions>
</dependency>

Zookeeper配置

Zookeeper配置连接信息

import org.apache.curator.RetryPolicy;
import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;@Configuration
public class ZookeeperConfig {@Bean("zookeeperClient")public CuratorFramework create() {RetryPolicy retryPolicy = new ExponentialBackoffRetry(1000, 3);CuratorFramework client = CuratorFrameworkFactory.newClient("localhost:2181", retryPolicy);client.start();return client;}
}

Zookeeper 的使用

节点监控

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.recipes.cache.ChildData;
import org.apache.curator.framework.recipes.cache.TreeCache;
import org.apache.curator.framework.recipes.cache.TreeCacheEvent;
import org.apache.curator.framework.recipes.cache.TreeCacheListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.CommandLineRunner;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Component;import com.plf.zookeeper.service.NodeService;@Component
@Order(1)
public class ZookeeperInit implements CommandLineRunner {private static final String ROOT_PATH = "/server";public TreeCache treeCache;@Autowiredprivate CuratorFramework zookeeperClient;@Autowiredprivate NodeService nodeService;@Overridepublic void run(String... args) throws Exception {if (!nodeService.isExitNode(ROOT_PATH)) {nodeService.createNode(ROOT_PATH);}// 监视某个节点的数据变化treeCache = new TreeCache(zookeeperClient, ROOT_PATH);treeCache.getListenable().addListener(new TreeCacheListener() {@Overridepublic void childEvent(CuratorFramework client, TreeCacheEvent event) throws Exception {ChildData eventData = event.getData();switch (event.getType()) {case NODE_ADDED:System.out.println(eventData.getPath() + "节点添加" + eventData.getPath() + "\t添加数据为："+ new String(eventData.getData()));break;case NODE_UPDATED:System.out.println(eventData.getPath() + "节点数据更新\t更新数据为：" + new String(eventData.getData())+ "\t版本为：" + eventData.getStat().getVersion());break;case NODE_REMOVED:System.out.println(eventData.getPath() + "节点被删除");break;default:break;}}});// 启动监视器对象treeCache.start();}
}

节点新增

import org.apache.curator.framework.CuratorFramework;
import org.apache.zookeeper.CreateMode;
import org.apache.zookeeper.data.Stat;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;@Service
public class NodeService {@Autowiredprivate CuratorFramework zookeeperClient;public void createNode(String nodePath) {try {zookeeperClient.create().creatingParentsIfNeeded().withMode(CreateMode.PERSISTENT).forPath(nodePath);} catch (Exception e) {e.printStackTrace();}}public boolean isExitNode(String path) {try {Stat stat = zookeeperClient.checkExists().forPath(path);if(stat == null) {return false;}return true;} catch (Exception e) {e.printStackTrace();}return false;}
}

还有很多其他的方法可以自行扩展。