如何在java中检查cassandra表中是否存在列？

import com.datastax.driver.core.Cluster;
import com.datastax.driver.core.ColumnMetadata;
import com.datastax.driver.core.Metadata;
import com.datastax.driver.core.Session;
import com.datastax.driver.core.TableMetadata;

public class CassandraColumnExistenceChecker {
    public static void main(String[] args) {
        // 连接到Cassandra集群
        Cluster cluster = Cluster.builder().addContactPoint("your_cassandra_host").build();
        Session session = cluster.connect("your_keyspace");

        // 获取表的元数据
        Metadata metadata = cluster.getMetadata();
        TableMetadata tableMetadata = metadata.getKeyspace("your_keyspace").getTable("your_table");

        // 检查列是否存在
        String columnName = "your_column";
        ColumnMetadata columnMetadata = tableMetadata.getColumn(columnName);
        if (columnMetadata != null) {
            System.out.println("列存在");
        } else {
            System.out.println("列不存在");
        }

        // 关闭连接
        session.close();
        cluster.close();
    }
}