在Bigtable中，可以将IDs存储为限定符。限定符是Bigtable中行的列族中的列的名称。通过将ID作为限定符，可以在表中唯一地标识每个列。下面是一个示例代码，展示了如何在Bigtable中存储IDs作为限定符：

import com.google.cloud.bigtable.hbase.BigtableConfiguration;
import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;

import java.io.IOException;

public class BigtableExample {

    private static final String PROJECT_ID = "your-project-id";
    private static final String INSTANCE_ID = "your-instance-id";
    private static final String TABLE_NAME = "your-table-name";
    private static final String COLUMN_FAMILY = "your-column-family";

    public static void main(String[] args) throws IOException {
        Connection connection = BigtableConfiguration.connect(PROJECT_ID, INSTANCE_ID);

        try {
            Admin admin = connection.getAdmin();
            TableName tableName = TableName.valueOf(TABLE_NAME);

            if (!admin.tableExists(tableName)) {
                createTable(admin, tableName);
            }

            Table table = connection.getTable(tableName);

            // Insert data with ID as the column qualifier
            String id1 = "id1";
            String id2 = "id2";
            String value1 = "value1";
            String value2 = "value2";

            putData(table, id1, value1);
            putData(table, id2, value2);

            // Retrieve data using ID as the column qualifier
            getData(table, id1);
            getData(table, id2);

            table.close();
        } finally {
            connection.close();
        }
    }

    private static void createTable(Admin admin, TableName tableName) throws IOException {
        HTableDescriptor tableDescriptor = new HTableDescriptor(tableName);
        HColumnDescriptor columnDescriptor = new HColumnDescriptor(COLUMN_FAMILY);
        tableDescriptor.addFamily(columnDescriptor);
        admin.createTable(tableDescriptor);
    }

    private static void putData(Table table, String id, String value) throws IOException {
        Put put = new Put(Bytes.toBytes(id));
        put.addColumn(Bytes.toBytes(COLUMN_FAMILY), Bytes.toBytes(id), Bytes.toBytes(value));
        table.put(put);
    }

    private static void getData(Table table, String id) throws IOException {
        Get get = new Get(Bytes.toBytes(id));
        Result result = table.get(get);
        for (Cell cell : result.rawCells()) {
            System.out.println("Row key: " + Bytes.toString(CellUtil.cloneRow(cell)));
            System.out.println("Column family: " + Bytes.toString(CellUtil.cloneFamily(cell)));
            System.out.println("Column qualifier (ID): " + Bytes.toString(CellUtil.cloneQualifier(cell)));
            System.out.println("Value: " + Bytes.toString(CellUtil.cloneValue(cell)));
        }
    }
}

在上面的示例中，首先创建一个Bigtable连接，并检查表是否存在。如果表不存在，则创建新表。然后，使用putData方法将数据插入表中，其中ID被用作列限定符。最后，使用getData方法检索数据，通过指定ID作为列限定符。