根据主键直接获取Hbase数据表的内容

网络上找的，很实用：

/**
     *
     * @param zkIp
     * @param zkPort
     * @param tablename
     * @param startRow   传null扫全表
     * @param stopRow 已~结尾
     * @throws Exception
     */
    public static void scanTable(String zkIp,String zkPort,String tablename,String startRow,String stopRow) throws Exception {

        HTablePool pool;
        Configuration config = HBaseConfiguration.create();
        config.set("hbase.zookeeper.quorum",zkIp);//
        config.set("hbase.zookeeper.property.clientPort", zkPort);
        pool = new HTablePool(config, 2);

        HTableInterface hbTable = null;
        try {
            hbTable = pool.getTable(tablename); // 表名
            ResultScanner rs = null;
            Scan scan = new Scan();
            // scan.addColumn(Bytes.toBytes("cf1"),Bytes.toBytes("qual1"));扫某一列
            if (startRow != null) { // 设置扫描的范围
                scan.setStartRow(Bytes.toBytes(startRow));
            }
            if (stopRow != null) {
                scan.setStopRow(Bytes.toBytes(stopRow));
            }

            rs = hbTable.getScanner(scan);
            hbTable.close();
            for (Result r : rs) {// 按行去遍历
                for (KeyValue kv : r.raw()) {// 遍历每一行的各列
                    StringBuffer sb = new StringBuffer()
                            .append(Bytes.toString(kv.getRow())).append("\t")
                            .append(Bytes.toString(kv.getFamily()))
                            .append("\t")
                            .append(Bytes.toString(kv.getQualifier()))
                            .append("\t").append(Bytes.toString(kv.getValue()));
                    System.out.println(sb.toString());
                    // kv.getRow() key
                    // kv.getFamily() cf1
                    // kv.getQualifier() 列名
                    // kv.getValue() value

                }

            }

        } catch (Exception e) {
            System.out.println(e.getMessage());
        }finally{
            pool.close();
        }

    }