使用Java代码实现清空Kafka主题

您可以使用以下Java代码来编程方式清空Kafka主题：

import java.util.Properties;
import org.apache.kafka.clients.admin.AdminClient;
import org.apache.kafka.clients.admin.DeleteRecordsResult;
import org.apache.kafka.clients.admin.KafkaAdminClient;
import org.apache.kafka.clients.admin.NewTopic;
import org.apache.kafka.common.KafkaFuture;
import org.apache.kafka.common.TopicPartition;
import org.apache.kafka.common.errors.TimeoutException;

public class KafkaTopicPurge {
    public static void main(String[] args) {
        // Set the properties required for KafkaAdminClient
        Properties properties = new Properties();
        properties.setProperty("bootstrap.servers", "localhost:9092");

        // Create an instance of KafkaAdminClient
        AdminClient admin = KafkaAdminClient.create(properties);

        // Create a new topic to perform the purge operation
        NewTopic topic = new NewTopic("topic-name", 1, (short) 1);

        // Create the topic if it does not exist
        admin.createTopics(Collections.singleton(topic));

        // Initialize a TopicPartition object
        TopicPartition tp = new TopicPartition("topic-name", 0);

        // Get the endOffset of the topic
        long endOffset = admin.listOffsets(Collections.singletonMap(tp, admin.describeTopics(Collections.singleton("topic-name")).all().get().get(topic).partitions().get(0)).get(tp).get().offset());

        // Delete the records from the beginning of the topic until the endOffset
        DeleteRecordsResult result = admin.deleteRecords(Collections.singletonMap(tp, RecordsToDelete.beforeOffset(endOffset + 1)));

        // Wait for the result of the operation and handle any exceptions that may occur
        try {
            result.all().get();
        } catch (InterruptedException | ExecutionException e) {
            e.printStackTrace();
        } catch (TimeoutException e) {
            e.printStackTrace();
        } finally {
            // Close the KafkaAdminClient
            admin.close();
        }
    }
}

在上面的示例中，我们首先设置了连接Kafka集群所需的属性。接下来，我们需要创建KafkaAdminClient实例，使用该实例可以执行管理操作，例如创建主题，删除主题和清空主题。

创建操作前，