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示例代码

package com.woozoom.hbase.test;import java.io.IOException;import java.util.*;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.*;import org.apache.hadoop.hbase.client.*;import org.apache.hadoop.hbase.util.Bytes;public class BaseOperation {private static final String TABLE_NAME = "demo_table";public static Configuration conf = null;public HTable table = null;public HBaseAdmin admin = null;static {conf = HBaseConfiguration.create();
    }/**     * 创建一张表     */    public static void creatTable(String strTN, String[] familys)throws Exception {Connection conn = ConnectionFactory.createConnection(conf);
        Admin admin = conn.getAdmin();
        TableName tn = TableName.valueOf(strTN);if (admin.tableExists(tn)) {
            System.out.println("table already exists!");
        } else {

            HTableDescriptor tableDesc = new HTableDescriptor(tn);for (String colFamily : familys) {
                tableDesc.addFamily(new HColumnDescriptor(colFamily));
            }
            admin.createTable(tableDesc);
            System.out.println("create table " + strTN + " ok.");
        }
    }/**     * 删除表     */    public static void deleteTable(String strTN) throws Exception {try {Connection conn = ConnectionFactory.createConnection(conf);
            Admin admin = conn.getAdmin();
            TableName tn = TableName.valueOf(strTN);admin.disableTable(tn);
            admin.deleteTable(tn);
            System.out.println("delete table " + strTN + " ok.");
        } catch (MasterNotRunningException e) {
            e.printStackTrace();
        } catch (ZooKeeperConnectionException e) {
            e.printStackTrace();
        }
    }/**     * 插入一行记录     */    public static void addRecord(String strTN, String rowKey,
                                 String family, String qualifier, String value) throws Exception {try {Connection conn = ConnectionFactory.createConnection(conf);
            TableName tn = TableName.valueOf(strTN);
            Table table = conn.getTable(tn);Put put = new Put(Bytes.toBytes(rowKey));
            put.addColumn(Bytes.toBytes(family), Bytes.toBytes(qualifier),
                    Bytes.toBytes(value));
            table.put(put);
            System.out.println("insert recored " + rowKey + " to table "                    + strTN + " ok.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }/**     * 删除一行记录     */    public static void delRecord(String strTN, String rowKey)throws IOException {Connection conn = ConnectionFactory.createConnection(conf);
        TableName tn = TableName.valueOf(strTN);
        Table table = conn.getTable(tn);List list = new ArrayList();
        Delete del = new Delete(rowKey.getBytes());
        list.add(del);
        table.delete(list);
        System.out.println("del recored " + rowKey + " ok.");
    }/**     * 查找一行记录     */    public static void getOneRecord(String strTN, String rowKey)throws IOException {        Connection conn = ConnectionFactory.createConnection(conf);
        TableName tn = TableName.valueOf(strTN);
        Table table = conn.getTable(tn);
        Get get = new Get(rowKey.getBytes());
        Result rs = table.get(get);for (Cell cell : rs.listCells()) {
            KeyValue kv = (KeyValue)cell;
            System.out.println("### " + new String(kv.getKey()) + " ###");
            System.out.println("### " + new String(Arrays.copyOfRange(cell.getFamilyArray(), cell.getFamilyOffset(), cell.getFamilyOffset() + cell.getFamilyLength())) + " ###");
            System.out.println("### " + new String(Arrays.copyOfRange(cell.getQualifierArray(), cell.getQualifierOffset(), cell.getQualifierOffset() + cell.getQualifierLength())) + " ###");
            System.out.println("### " + new String(Arrays.copyOfRange(cell.getValueArray(), cell.getValueOffset(), cell.getValueOffset() + cell.getValueLength())) + " ###");
            System.out.println("### " + cell.getTimestamp() + " ###");
        }NavigableMap> nm = rs.getNoVersionMap();for(byte[] family : nm.keySet()){
            System.out.println(new String(family));
            NavigableMap nmSon = nm.get(family);for (byte[]  qualifier : nmSon.keySet()){
                System.out.println(new String(qualifier));byte[] value = nmSon.get(qualifier);
                System.out.println(new String(value));
            }
        }

    }/**     * 显示所有数据     */    public static void getAllRecord(String strTN) {try {            Connection conn = ConnectionFactory.createConnection(conf);
            TableName tn = TableName.valueOf(strTN);
            Table table = conn.getTable(tn);
            Scan s = new Scan();
            ResultScanner ss = table.getScanner(s);for (Result r : ss) {for (Cell cell : r.listCells()) {
                    KeyValue kv = (KeyValue)cell;
                    System.out.print(new String(kv.getKey()) + " ");
                    System.out.print(new String(Arrays.copyOfRange(kv.getFamilyArray(), kv.getFamilyOffset(), kv.getFamilyOffset() + kv.getFamilyLength())) + ":");
                    System.out.print(new String(Arrays.copyOfRange(kv.getQualifierArray(), kv.getQualifierOffset(), kv.getQualifierOffset() + kv.getQualifierLength())) + " ");
                    System.out.print(kv.getTimestamp() + " ");
                    System.out.println(new String(Arrays.copyOfRange(kv.getValueArray(), kv.getValueOffset(), kv.getValueOffset() + kv.getValueLength())));
                }
            }} catch (IOException e) {
            e.printStackTrace();
        }
    }public static void main(String[] agrs) {try {
            String tablename = "scores1";
            String[] familys = {"grade", "course"};
            BaseOperation.creatTable(tablename, familys);// add record zkb            BaseOperation.addRecord(tablename, "zkb", "grade", "", "5");
            BaseOperation.addRecord(tablename, "zkb", "course", "", "90");
            BaseOperation.addRecord(tablename, "zkb", "course", "math", "97");
            BaseOperation.addRecord(tablename, "zkb", "course", "art", "87");// add record baoniu            BaseOperation.addRecord(tablename, "baoniu", "grade", "", "4");
            BaseOperation
                    .addRecord(tablename, "baoniu", "course", "math", "89");

            System.out.println("===========get one record========");
            BaseOperation.getOneRecord(tablename, "zkb");

            System.out.println("===========show all record========");
            BaseOperation.getAllRecord(tablename);

            System.out.println("===========del one record========");
            BaseOperation.delRecord(tablename, "baoniu");
            BaseOperation.getAllRecord(tablename);

            System.out.println("===========show all record========");
            BaseOperation.getAllRecord(tablename);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

}

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