hbase demo

 

HbaseDao

public class HbaseDao {

	@Test
	public void insertTest() throws Exception {

		Configuration conf = HBaseConfiguration.create();
		conf.set("hbase.zookeeper.quorum", "weekend05:2181,weekend06:2181,weekend07:2181");

		HTable nvshen = new HTable(conf, "nvshen");

		Put name = new Put(Bytes.toBytes("rk0001"));
		name.add(Bytes.toBytes("base_info"), Bytes.toBytes("name"), Bytes.toBytes("angelababy"));

		Put age = new Put(Bytes.toBytes("rk0001"));
		age.add(Bytes.toBytes("base_info"), Bytes.toBytes("age"), Bytes.toBytes(18));

		ArrayList<Put> puts = new ArrayList<>();
		puts.add(name);
		puts.add(age);

		nvshen.put(puts);

	}

	public static void main(String[] args) throws Exception {

		Configuration conf = HBaseConfiguration.create();
		conf.set("hbase.zookeeper.quorum", "weekend05:2181,weekend06:2181,weekend07:2181");

		HBaseAdmin admin = new HBaseAdmin(conf);

		TableName name = TableName.valueOf("nvshen");

		HTableDescriptor desc = new HTableDescriptor(name);

		HColumnDescriptor base_info = new HColumnDescriptor("base_info");
		HColumnDescriptor extra_info = new HColumnDescriptor("extra_info");
		base_info.setMaxVersions(5);

		desc.addFamily(base_info);
		desc.addFamily(extra_info);

		admin.createTable(desc);

	}

}

 

HbaseDemo（不用敲，當作字典）

public class HbaseDemo {

	private Configuration conf = null;
	
	@Before
	public void init(){
		conf = HBaseConfiguration.create();
		conf.set("hbase.zookeeper.quorum", "weekend05,weekend06,weekend07");
	}
	
	@Test
	public void testDrop() throws Exception{
		HBaseAdmin admin = new HBaseAdmin(conf);
		admin.disableTable("account");
		admin.deleteTable("account");
		admin.close();
	}
	
	@Test
	public void testPut() throws Exception{
		HTable table = new HTable(conf, "person_info");
		Put p = new Put(Bytes.toBytes("person_rk_bj_zhang_000002"));
		p.add("base_info".getBytes(), "name".getBytes(), "zhangwuji".getBytes());
		table.put(p);
		table.close();
	}
	
	@Test
	public void testGet() throws Exception{
		HTable table = new HTable(conf, "person_info");
		Get get = new Get(Bytes.toBytes("person_rk_bj_zhang_000001"));
		get.setMaxVersions(5);
		Result result = table.get(get);
		List<Cell> cells = result.listCells();
		
//			result.getValue(family, qualifier);  ���Դ�result��ֱ��ȡ��һ���ض���value
		
		//������result�����еļ�ֵ��
		for(KeyValue kv : result.list()){
			String family = new String(kv.getFamily());
			System.out.println(family);
			String qualifier = new String(kv.getQualifier());
			System.out.println(qualifier);
			System.out.println(new String(kv.getValue()));
			
		}
		table.close();
	}
	
	/**
	 * ���ֹ���������ʹ�÷���
	 * @throws Exception
	 */
	@Test
	public void testScan() throws Exception{
		HTable table = new HTable(conf, "person_info".getBytes());
		Scan scan = new Scan(Bytes.toBytes("person_rk_bj_zhang_000001"), Bytes.toBytes("person_rk_bj_zhang_000002"));
		
		//ǰ׺������----����м�
		Filter filter = new PrefixFilter(Bytes.toBytes("rk"));
		
		//�����
		ByteArrayComparable rowComparator = new BinaryComparator(Bytes.toBytes("person_rk_bj_zhang_000001"));
		RowFilter rf = new RowFilter(CompareOp.LESS_OR_EQUAL, rowComparator);
		
		/**
         * ����rowkey��ʽΪ����������_��������_ID_TITLE
         * Ŀ�꣺����  ��������  Ϊ  2014-12-21  ������
         */
        rf = new RowFilter(CompareOp.EQUAL , new SubstringComparator("_2014-12-21_"));
		
		
		//��ֵ������ 1 ����ƥ���ֽ�����
		new SingleColumnValueFilter("base_info".getBytes(), "name".getBytes(), CompareOp.EQUAL, "zhangsan".getBytes());
		//��ֵ������2 ƥ��������ʽ
		ByteArrayComparable comparator = new RegexStringComparator("zhang.");
		new SingleColumnValueFilter("info".getBytes(), "NAME".getBytes(), CompareOp.EQUAL, comparator);

		//��ֵ������2 ƥ���Ƿ�����Ӵ�,��Сд������
		comparator = new SubstringComparator("wu");
		new SingleColumnValueFilter("info".getBytes(), "NAME".getBytes(), CompareOp.EQUAL, comparator);

		//��ֵ��Ԫ���ݹ���-----family����----�ֽ���������ƥ��
        FamilyFilter ff = new FamilyFilter(
                CompareOp.EQUAL , 
                new BinaryComparator(Bytes.toBytes("base_info"))   //���в�����inf���壬���˽��Ϊ��
                );
        //��ֵ��Ԫ���ݹ���-----family����----�ֽ�����ǰ׺ƥ��
        ff = new FamilyFilter(
                CompareOp.EQUAL , 
                new BinaryPrefixComparator(Bytes.toBytes("inf"))   //���д�����inf��ͷ������info�����˽��Ϊ������������
                );
		
        
       //��ֵ��Ԫ���ݹ���-----qualifier����----�ֽ���������ƥ��
        
        filter = new QualifierFilter(
                CompareOp.EQUAL , 
                new BinaryComparator(Bytes.toBytes("na"))   //���в�����na�У����˽��Ϊ��
                );
        filter = new QualifierFilter(
                CompareOp.EQUAL , 
                new BinaryPrefixComparator(Bytes.toBytes("na"))   //���д�����na��ͷ����name�����˽��Ϊ�����еĸ�������
        		);
		
        //��������(��Qualifier)ǰ׺�������ݵ�ColumnPrefixFilter
        filter = new ColumnPrefixFilter("na".getBytes());
        
        //��������(��Qualifier)���ǰ׺�������ݵ�MultipleColumnPrefixFilter
        byte[][] prefixes = new byte[][] {Bytes.toBytes("na"), Bytes.toBytes("me")};
        filter = new MultipleColumnPrefixFilter(prefixes);
 
        //Ϊ��ѯ���ù�������
        scan.setFilter(filter);
        
        
		scan.addFamily(Bytes.toBytes("base_info"));
		ResultScanner scanner = table.getScanner(scan);
		for(Result r : scanner){
			/**
			for(KeyValue kv : r.list()){
				String family = new String(kv.getFamily());
				System.out.println(family);
				String qualifier = new String(kv.getQualifier());
				System.out.println(qualifier);
				System.out.println(new String(kv.getValue()));
			}
			*/
			//ֱ�Ӵ�result��ȡ��ij���ض���value
			byte[] value = r.getValue(Bytes.toBytes("base_info"), Bytes.toBytes("name"));
			System.out.println(new String(value));
		}
		table.close();
	}
	
	
	@Test
	public void testDel() throws Exception{
		HTable table = new HTable(conf, "user");
		Delete del = new Delete(Bytes.toBytes("rk0001"));
		del.deleteColumn(Bytes.toBytes("data"), Bytes.toBytes("pic"));
		table.delete(del);
		table.close();
	}
	
	
	
	
	public static void main(String[] args) throws Exception {
		Configuration conf = HBaseConfiguration.create();
//		conf.set("hbase.zookeeper.quorum", "weekend05:2181,weekend06:2181,weekend07:2181");
		HBaseAdmin admin = new HBaseAdmin(conf);
		
		TableName tableName = TableName.valueOf("person_info");
		HTableDescriptor td = new HTableDescriptor(tableName);
		HColumnDescriptor cd = new HColumnDescriptor("base_info");
		cd.setMaxVersions(10);
		td.addFamily(cd);
		admin.createTable(td);
		
		admin.close();

	}
	
	

}