fly6516
15b008dc35
- 新增 HBaseConnectionManager 类用于管理 HBase 连接 - 新增 HBaseTableManager 类用于管理 HBase 表操作 - 新增 EmployeeDAO 和 TrainingDAO 类用于数据访问和操作 - 优化代码结构，提高可维护性和可扩展性
26 lines
1.0 KiB
Java
26 lines
1.0 KiB
Java
// 新建表管理类
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import org.apache.hadoop.hbase.HColumnDescriptor;
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import org.apache.hadoop.hbase.HTableDescriptor;
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import org.apache.hadoop.hbase.TableName;
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import org.apache.hadoop.hbase.client.Admin;
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public class HBaseTableManager {
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private static final String TABLE_NAME = "emp1520";
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private static final String[] CF_ARRAY = {"empnum", "info", "salary", "performance", "training"};
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public static void createTable(Admin admin) throws IOException {
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TableName tableName = TableName.valueOf(TABLE_NAME);
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if (admin.tableExists(tableName)) {
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admin.disableTable(tableName);
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admin.deleteTable(tableName);
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System.out.println("Existing table removed");
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}
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HTableDescriptor tableDescriptor = new HTableDescriptor(tableName);
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for (String cf : CF_ARRAY) {
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tableDescriptor.addFamily(new HColumnDescriptor(cf));
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}
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admin.createTable(tableDescriptor);
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System.out.println("Table created successfully");
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}
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} |