Hbase 過濾器以及比較器案例

hbase過濾查詢， 感覺還是很有用的。 機率一下案例， 備用

 比較器運算符      左邊是代碼名稱，右邊是 含義

            CompareOp.EQUAL; =
            CompareOp.LESS ;<
            CompareOp.LESS_OR_EQUAL;  <==
            CompareOp.NOT_EQUAL ;!=
            CompareOp.GREATER_OR_EQUAL;  >=
            CompareOp.GREATER; >
            CompareOp.NO_OP ; (no operation)

本次用到了  列值過濾器   SingleColumnValueFilter

@Test
	public void scanFilter() throws Exception {
		FilterList filterList = new FilterList();
		String start_rowkey = "20160810000000_2475_0825";
		String stop_rowkey =  "20160810165552_2999_0977";
		String tableName = "t1";//下面爲目標數據
 
		List<String> arr = new ArrayList<String>();
		arr.add("info,tone,5000");
		arr.add("info,tone,5010");
		for (int i=0 ;i<=1;i++) { // 各個條件之間是“與”的關係
			if (i==0) {
				String[] s = arr.get(i).split(",");
				filterList.addFilter(new SingleColumnValueFilter(Bytes
						.toBytes(s[0]), Bytes.toBytes(s[1]), CompareOp.GREATER, Bytes //tone大於5000
						.toBytes(s[2])));
			}else{
				String[] s = arr.get(i).split(",");
				filterList.addFilter(new SingleColumnValueFilter(Bytes //並且 tone小於5010的值
						.toBytes(s[0]), Bytes.toBytes(s[1]), CompareOp.LESS, Bytes
						.toBytes(s[2])));
			}
			 
			 
		}

		Scan scan = new Scan();
		scan.setFilter(filterList);
		scan.setStartRow(Bytes.toBytes(start_rowkey));
		scan.setStopRow(Bytes.toBytes(stop_rowkey));
		ResultScanner rs = null;
		HTable table = new HTable(conf, Bytes.toBytes(tableName));
		try {
			Date begin2 = new Date();
			rs = table.getScanner(scan);

			Date end2 = new Date();
			long between2 = end2.getTime() - begin2.getTime();
			System.out.println(" scanfilter數據  time = " + between2 + " ms!");

			for (Result r : rs) {

				for (KeyValue kv : r.list()) {

					System.out.print(new String(kv.getRow()) + " ");
					System.out.print(new String(kv.getFamily()) + ":");
					System.out.print(new String(kv.getQualifier()) + " ");
					System.out.print(kv.getTimestamp() + " ");
					System.out.println(new String(kv.getValue()));
				}
			}
		} finally {
			rs.close();
		}
		System.out.println("scanfilter條件查詢結束");
	}

20160810165552_1887_0629 info:time 1470819341688 20160810165552
20160810165552_1887_0629 info:tone 1470819341688 501
20160810165552_1887_0629 info:val 1470819341688 901
scanfilter條件查詢結束  得到想要的數據了

其中可以將 

CompareOp.GREATER  替換爲想要替換的 比較方式，進行值的篩選