1. 導入Maven依賴
<!--HBase依賴-->
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-client</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-server</artifactId>
<version>1.3.1</version>
</dependency>
<dependency>
<groupId>org.apache.hbase</groupId>
<artifactId>hbase-common</artifactId>
<version>1.3.1</version>
</dependency>
2. API 基本使用
public class HBaseUtil {
private static Connection connection;
static {
Configuration configuration = HBaseConfiguration.create();
configuration.set("hbase.zookeeper.property.clientPort", "2181");
// 如果報zookeeper.znode.parent相關錯誤就加上下面這句
// configuration.set("zookeeper.znode.parent","/hbase-unsecure");
// 如果是集羣 則主機名用逗號分隔
configuration.set("hbase.zookeeper.quorum", "hadoop001");
try {
connection = ConnectionFactory.createConnection(configuration);
} catch (IOException e) {
e.printStackTrace();
}
}
/**
* 創建 HBase 表
*
* @param tableName 表名
* @param columnFamilies 列族的數組
*/
public static boolean createTable(String tableName, List<String> columnFamilies) {
try {
HBaseAdmin admin = (HBaseAdmin) connection.getAdmin();
if (admin.tableExists(tableName)) {
return false;
}
HTableDescriptor tableDescriptor = new HTableDescriptor(TableName.valueOf(tableName));
columnFamilies.forEach(columnFamily -> {
HColumnDescriptor columnDescriptor = new HColumnDescriptor(columnFamily);
columnDescriptor.setMaxVersions(1);
tableDescriptor.addFamily(columnDescriptor);
});
admin.createTable(tableDescriptor);
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
/**
* 刪除 hBase 表
*
* @param tableName 表名
*/
public static boolean deleteTable(String tableName) {
try {
HBaseAdmin admin = (HBaseAdmin) connection.getAdmin();
// 刪除表前需要先禁用表
admin.disableTable(tableName);
admin.deleteTable(tableName);
} catch (Exception e) {
e.printStackTrace();
}
return true;
}
/**
* 插入數據
*
* @param tableName 表名
* @param rowKey 唯一標識
* @param columnFamilyName 列族名
* @param qualifier 列標識
* @param value 數據
*/
public static boolean putRow(String tableName, String rowKey, String columnFamilyName, String qualifier,
String value) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Put put = new Put(Bytes.toBytes(rowKey));
put.addColumn(Bytes.toBytes(columnFamilyName), Bytes.toBytes(qualifier), Bytes.toBytes(value));
table.put(put);
table.close();
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
/**
* 插入數據
*
* @param tableName 表名
* @param rowKey 唯一標識
* @param columnFamilyName 列族名
* @param pairList 列標識和值的集合
*/
public static boolean putRow(String tableName, String rowKey, String columnFamilyName, List<Pair<String, String>> pairList) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Put put = new Put(Bytes.toBytes(rowKey));
pairList.forEach(pair -> put.addColumn(Bytes.toBytes(columnFamilyName), Bytes.toBytes(pair.getKey()), Bytes.toBytes(pair.getValue())));
table.put(put);
table.close();
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
/**
* 根據 rowKey 獲取指定行的數據
*
* @param tableName 表名
* @param rowKey 唯一標識
*/
public static Result getRow(String tableName, String rowKey) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Get get = new Get(Bytes.toBytes(rowKey));
return table.get(get);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 獲取指定行指定列 (cell) 的最新版本的數據
*
* @param tableName 表名
* @param rowKey 唯一標識
* @param columnFamily 列族
* @param qualifier 列標識
*/
public static String getCell(String tableName, String rowKey, String columnFamily, String qualifier) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Get get = new Get(Bytes.toBytes(rowKey));
if (!get.isCheckExistenceOnly()) {
get.addColumn(Bytes.toBytes(columnFamily), Bytes.toBytes(qualifier));
Result result = table.get(get);
byte[] resultValue = result.getValue(Bytes.toBytes(columnFamily), Bytes.toBytes(qualifier));
return Bytes.toString(resultValue);
} else {
return null;
}
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 檢索全表
*
* @param tableName 表名
*/
public static ResultScanner getScanner(String tableName) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Scan scan = new Scan();
return table.getScanner(scan);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 檢索表中指定數據
*
* @param tableName 表名
* @param filterList 過濾器
*/
public static ResultScanner getScanner(String tableName, FilterList filterList) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Scan scan = new Scan();
scan.setFilter(filterList);
return table.getScanner(scan);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 檢索表中指定數據
*
* @param tableName 表名
* @param startRowKey 起始 RowKey
* @param endRowKey 終止 RowKey
* @param filterList 過濾器
*/
public static ResultScanner getScanner(String tableName, String startRowKey, String endRowKey,
FilterList filterList) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Scan scan = new Scan();
scan.setStartRow(Bytes.toBytes(startRowKey));
scan.setStopRow(Bytes.toBytes(endRowKey));
scan.setFilter(filterList);
return table.getScanner(scan);
} catch (IOException e) {
e.printStackTrace();
}
return null;
}
/**
* 刪除指定行記錄
*
* @param tableName 表名
* @param rowKey 唯一標識
*/
public static boolean deleteRow(String tableName, String rowKey) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Delete delete = new Delete(Bytes.toBytes(rowKey));
table.delete(delete);
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
/**
* 刪除指定行的指定列
*
* @param tableName 表名
* @param rowKey 唯一標識
* @param familyName 列族
* @param qualifier 列標識
*/
public static boolean deleteColumn(String tableName, String rowKey, String familyName,
String qualifier) {
try {
Table table = connection.getTable(TableName.valueOf(tableName));
Delete delete = new Delete(Bytes.toBytes(rowKey));
delete.addColumn(Bytes.toBytes(familyName), Bytes.toBytes(qualifier));
table.delete(delete);
table.close();
} catch (IOException e) {
e.printStackTrace();
}
return true;
}
}