HBase 詳細API操作

環境準備

新建項目後在pom.xml中添加依賴：

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-server</artifactId>
    <version>1.3.1</version>
</dependency>

<dependency>
    <groupId>org.apache.hbase</groupId>
    <artifactId>hbase-client</artifactId>
    <version>1.3.1</version>
</dependency>

<dependency>
	<groupId>jdk.tools</groupId>
	<artifactId>jdk.tools</artifactId>
	<version>1.8</version>
	<scope>system</scope>
	<systemPath>${JAVA_HOME}/lib/tools.jar</systemPath>
</dependency>

HBaseAPI

獲取Configuration對象

public static Configuration conf;
static{
	//使用HBaseConfiguration的單例方法實例化
	conf = HBaseConfiguration.create();
conf.set("hbase.zookeeper.quorum", "192.168.9.102");
conf.set("hbase.zookeeper.property.clientPort", "2181");
}

判斷表是否存在

public static boolean isTableExist(String tableName) throws MasterNotRunningException,
 ZooKeeperConnectionException, IOException{
	//在HBase中管理、訪問表需要先創建HBaseAdmin對象
//Connection connection = ConnectionFactory.createConnection(conf);
//HBaseAdmin admin = (HBaseAdmin) connection.getAdmin();
	HBaseAdmin admin = new HBaseAdmin(conf);
	return admin.tableExists(tableName);
}

創建表

public static void createTable(String tableName, String... columnFamily) throws
 MasterNotRunningException, ZooKeeperConnectionException, IOException{
	HBaseAdmin admin = new HBaseAdmin(conf);
	//判斷表是否存在
	if(isTableExist(tableName)){
		System.out.println("表" + tableName + "已存在");
		//System.exit(0);
	}else{
		//創建表屬性對象,表名需要轉字節
		HTableDescriptor descriptor = new HTableDescriptor(TableName.valueOf(tableName));
		//創建多個列族
		for(String cf : columnFamily){
			descriptor.addFamily(new HColumnDescriptor(cf));
		}
		//根據對錶的配置，創建表
		admin.createTable(descriptor);
		System.out.println("表" + tableName + "創建成功！");
	}
}

刪除表

public static void dropTable(String tableName) throws MasterNotRunningException,
 ZooKeeperConnectionException, IOException{
	HBaseAdmin admin = new HBaseAdmin(conf);
	if(isTableExist(tableName)){
		admin.disableTable(tableName);
		admin.deleteTable(tableName);
		System.out.println("表" + tableName + "刪除成功！");
	}else{
		System.out.println("表" + tableName + "不存在！");
	}
}

向表中插入數據

public static void addRowData(String tableName, String rowKey, String columnFamily, String
 column, String value) throws IOException{
	//創建HTable對象
	HTable hTable = new HTable(conf, tableName);
	//向表中插入數據
	Put put = new Put(Bytes.toBytes(rowKey));
	//向Put對象中組裝數據
	put.add(Bytes.toBytes(columnFamily), Bytes.toBytes(column), Bytes.toBytes(value));
	hTable.put(put);
	hTable.close();
	System.out.println("插入數據成功");
}

刪除多行數據

public static void deleteMultiRow(String tableName, String... rows) throws IOException{
	HTable hTable = new HTable(conf, tableName);
	List<Delete> deleteList = new ArrayList<Delete>();
	for(String row : rows){
		Delete delete = new Delete(Bytes.toBytes(row));
		deleteList.add(delete);
	}
	hTable.delete(deleteList);
	hTable.close();
}

獲取所有數據

public static void getAllRows(String tableName) throws IOException{
	HTable hTable = new HTable(conf, tableName);
	//得到用於掃描region的對象
	Scan scan = new Scan();
	//使用HTable得到resultcanner實現類的對象
	ResultScanner resultScanner = hTable.getScanner(scan);
	for(Result result : resultScanner){
		Cell[] cells = result.rawCells();
		for(Cell cell : cells){
			//得到rowkey
			System.out.println("行鍵:" + Bytes.toString(CellUtil.cloneRow(cell)));
			//得到列族
			System.out.println("列族" + Bytes.toString(CellUtil.cloneFamily(cell)));
			System.out.println("列:" + Bytes.toString(CellUtil.cloneQualifier(cell)));
			System.out.println("值:" + Bytes.toString(CellUtil.cloneValue(cell)));
		}
	}
}

獲取某一行數據

public static void getRow(String tableName, String rowKey) throws IOException{
	HTable table = new HTable(conf, tableName);
	Get get = new Get(Bytes.toBytes(rowKey));
	//get.setMaxVersions();顯示所有版本
    //get.setTimeStamp();顯示指定時間戳的版本
	Result result = table.get(get);
	for(Cell cell : result.rawCells()){
		System.out.println("行鍵:" + Bytes.toString(result.getRow()));
		System.out.println("列族" + Bytes.toString(CellUtil.cloneFamily(cell)));
		System.out.println("列:" + Bytes.toString(CellUtil.cloneQualifier(cell)));
		System.out.println("值:" + Bytes.toString(CellUtil.cloneValue(cell)));
		System.out.println("時間戳:" + cell.getTimestamp());
	}
}

獲取某一行指定“列族:列”的數據

public static void getRowQualifier(String tableName, String rowKey, String family, String
 qualifier) throws IOException{
	HTable table = new HTable(conf, tableName);
	Get get = new Get(Bytes.toBytes(rowKey));
	get.addColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier));
	Result result = table.get(get);
	for(Cell cell : result.rawCells()){
		System.out.println("行鍵:" + Bytes.toString(result.getRow()));
		System.out.println("列族" + Bytes.toString(CellUtil.cloneFamily(cell)));
		System.out.println("列:" + Bytes.toString(CellUtil.cloneQualifier(cell)));
		System.out.println("值:" + Bytes.toString(CellUtil.cloneValue(cell)));
	}
}

簡書：https://www.jianshu.com/u/0278602aea1d
CSDN：https://blog.csdn.net/u012387141