hbase 1.2 api 工具类

hbase之前版本有些api已经deprecated了，下面是1.2的api，没有deprecated

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.Executors;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.client.Table;
import org.apache.hadoop.hbase.util.Bytes;


public class HBaseUtils {
     private static Configuration conf = HBaseConfiguration.create();
     private static ExecutorService pool=Executors.newScheduledThreadPool(20);
     private static Connection connection = null;
     private static HBaseUtils instance=null;
     
     private HBaseUtils(){
         if(connection==null){
             try {
                connection=ConnectionFactory.createConnection(conf, pool);
            } catch (IOException e) {
                e.printStackTrace();
            }
         }
     }
     
     public static synchronized HBaseUtils getInstance(){
         if(instance==null){
             instance=new HBaseUtils();
         }
         return instance;
     }
      /**
     * 创建表
     * @throws IOException
     */
    public void createTable(String tableName, String[] columns) throws IOException {
        Admin admin = connection.getAdmin();
        TableName name=TableName.valueOf(tableName);
        if (admin.tableExists(name)) {
            admin.disableTable(name);
            admin.deleteTable(name);
        } else {
            HTableDescriptor desc =admin.getTableDescriptor(name);
            for (String column : columns) {
                desc.addFamily(new HColumnDescriptor(column));
            }
            admin.createTable(desc);
        }
    }
    
    /**
     * 插入一行记录
     * @param tablename
     *             表名
     * @param row
     *             行名称
     * @param columnFamily
     *             列族名
     * @param columns
     *             （列族名：column）组合成列名
     * @param values
     *             行与列确定的值
     */
    public void insertRecord(String tableName, String row, String columnFamily, String[] columns, String[] values) {
        try {
            TableName name=TableName.valueOf(tableName);
            Table table = connection.getTable(name);
            Put put = new Put(Bytes.toBytes(row));
            for (int i = 0; i < columns.length; i++) {
                put.addColumn(Bytes.toBytes(columnFamily),
                        Bytes.toBytes(String.valueOf(columns[i])),
                        Bytes.toBytes(values[i]));
                table.put(put);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
    
    /**
     * 删除一行记录
     * @param tablename
     *             表名
     * @param rowkey
     *             行名
     * @throws IOException
     */
    public void deleteRow(String tablename, String rowkey) throws IOException {
        TableName name=TableName.valueOf(tablename);
        Table table = connection.getTable(name);
        List<Delete> list = new ArrayList<Delete>();
        Delete d1 = new Delete(rowkey.getBytes());
        list.add(d1);
        table.delete(list);
    }
    
    /**
     * 查找一行记录
     * @param tablename
     *             表名
     * @param rowkey
     *             行名
     */
    public static void selectRow(String tablename, String rowKey)
            throws IOException {
        TableName name=TableName.valueOf(tablename);
        Table table = connection.getTable(name);
        Get g = new Get(rowKey.getBytes());
        Result rs = table.get(g);
        for (Cell cell : rs.rawCells()) {
            System.out.print(new String(cell.getRowArray()) + "  ");
            System.out.print(new String(cell.getFamilyArray()) + ":");
            System.out.print(new String(cell.getQualifierArray()) + "  ");
            System.out.print(cell.getTimestamp() + "  ");
            System.out.println(new String(cell.getValueArray()));
        }
    }
    
    /**
     * 查询表中所有行
     * @param tablename
     */
    public List scanAllRecord(String tablename) {
        try {
            List entityList=new ArrayList();
            TableName name=TableName.valueOf(tablename);
            Table table = connection.getTable(name);
            Scan s = new Scan();
            ResultScanner rs = table.getScanner(s);
            for(Result result : rs){
                for (Cell cell : result.rawCells()) {
                    HBaseBaseEntity entity=new HBaseBaseEntity();
                    entity.setRowKey(new String(CellUtil.cloneRow(cell)));
                    entity.setFamily(new String(CellUtil.cloneFamily(cell)));
                    entity.setQualifier(new String(CellUtil.cloneQualifier(cell)));
                    entity.setTimestamp(cell.getTimestamp());
                    entity.setValue(CellUtil.cloneValue(cell));
                    entityList.add(entity);
                }
            }
            return entityList;
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
    /**
     * 删除表操作
     * @param tablename
     * @throws IOException
     */
    public void deleteTable(String tablename) throws IOException {
        try {
            TableName name=TableName.valueOf(tablename);
                if(admin.tableExists(name)){
                  admin.disableTable(name);
                  admin.deleteTable(name);
                }
        } catch (MasterNotRunningException e) {
            e.printStackTrace();
        } catch (ZooKeeperConnectionException e) {
            e.printStackTrace();
        }
    }
}