zookeeper springboot怎么实现数据交互

要在Spring Boot中使用Apache ZooKeeper进行数据交互，你需要遵循以下步骤：

添加依赖

在你的pom.xml文件中添加以下依赖：

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-data-zookeeper</artifactId>
</dependency>

配置ZooKeeper连接

在你的application.properties或application.yml文件中配置ZooKeeper连接信息：

# application.properties
spring.zookeeper.connect=localhost:2181
spring.zookeeper.session-timeout=3000
spring.zookeeper.connection-timeout=3000

或者

# application.yml
spring:
  zookeeper:
    connect: localhost:2181
    session-timeout: 3000
    connection-timeout: 3000

创建一个ZooKeeper配置类

创建一个配置类，用于初始化ZooKeeper的CuratorFramework实例：

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.CuratorFrameworkFactory;
import org.apache.curator.retry.ExponentialBackoffRetry;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;

@Configuration
public class ZooKeeperConfig {

    @Value("${spring.zookeeper.connect}")
    private String connect;

    @Bean
    public CuratorFramework curatorFramework() {
        return CuratorFrameworkFactory.builder()
                .connectString(connect)
                .retryPolicy(new ExponentialBackoffRetry(1000, 3))
                .build();
    }
}

创建一个服务类，用于操作ZooKeeper数据

创建一个服务类，用于操作ZooKeeper中的数据。例如，你可以创建一个名为ZooKeeperService的类：

import org.apache.curator.framework.CuratorFramework;
import org.apache.curator.framework.recipes.cache.NodeCache;
import org.apache.curator.framework.recipes.cache.NodeCacheListener;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class ZooKeeperService {

    @Autowired
    private CuratorFramework curatorFramework;

    public void createNode(String path, byte[] data) throws Exception {
        if (curatorFramework.checkExists().forPath(path) == null) {
            curatorFramework.create().creatingParentsIfNeeded().withMode(CuratorFramework.Mode.PERSISTENT).forPath(path, data);
        }
    }

    public void updateNode(String path, byte[] data) throws Exception {
        if (curatorFramework.checkExists().forPath(path) != null) {
            curatorFramework.setData().forPath(path, data);
        }
    }

    public byte[] getNodeData(String path) throws Exception {
        if (curatorFramework.checkExists().forPath(path) != null) {
            return curatorFramework.getData().forPath(path);
        }
        return null;
    }

    public void watchNode(String path, NodeCacheListener listener) throws Exception {
        NodeCache nodeCache = new NodeCache(curatorFramework, path);
        nodeCache.start();
        nodeCache.getListenable().addListener(listener);
    }
}

使用服务类进行数据交互

在你的控制器或其他需要与ZooKeeper交互的地方，注入ZooKeeperService并使用它进行数据操作：

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class ZooKeeperController {

    @Autowired
    private ZooKeeperService zooKeeperService;

    @GetMapping("/createNode")
    public String createNode() throws Exception {
        zooKeeperService.createNode("/testNode", "Hello, ZooKeeper!".getBytes());
        return "Node created successfully";
    }

    @GetMapping("/getNodeData")
    public String getNodeData() throws Exception {
        byte[] data = zooKeeperService.getNodeData("/testNode");
        return new String(data);
    }
}

这样，你就可以在Spring Boot应用中使用ZooKeeper进行数据交互了。注意，这里的示例仅用于演示目的，实际应用中你可能需要根据需求进行调整。

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