HBase操作一

package Hbase;

import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HTable;
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.util.Bytes;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetDataEncryptionKeyRequestProto;
import org.apache.hadoop.io.IOUtils;

public class HbaseOperation {

    public static HTable getHTableByTableName(String tableName) throws IOException {
        // get instance of default configuration
        Configuration configuration = HBaseConfiguration.create();
        // get table instance
        HTable table = new HTable(configuration, tableName);
        
        return table;
    }
    
    public static void getData(String tableName) throws IOException{
        //String tableName = "user";
        HTable table = getHTableByTableName(tableName);
        //create get with rowkey
        Get rowkey = new Get(Bytes.toBytes("10001"));
        //****************************************************
        //add column
        rowkey.addColumn(//
                Bytes.toBytes("info"),//
                Bytes.toBytes("name")
                );
        
        rowkey.addColumn(//
                Bytes.toBytes("info"),//
                Bytes.toBytes("age")
                );
        
        //get data
        Result result = table.get(rowkey);
        //key : rewkey + cf +c +version
        //value :value
        for(Cell cell:result.rawCells()){
            System.out.println(//
               Bytes.toString(CellUtil.cloneFamily(cell)) + ":" //
               + Bytes.toString(CellUtil.cloneQualifier(cell)) + "-->" //
               + Bytes.toString(CellUtil.cloneValue(cell))
            );
        }
        //table close
        table.close();

    }
    
    public static void putData(String tableName) throws IOException {
        //String tableName = "user";
        HTable table = getHTableByTableName(tableName);
        
        Put put = new Put(Bytes.toBytes("10003"));
        //add a column with value
        put.add(//
            Bytes.toBytes("info"),//
            Bytes.toBytes("name"),//
            Bytes.toBytes("wangwu")//
            );
        
        put.add(//
                Bytes.toBytes("info"),//
                Bytes.toBytes("age"),//
                Bytes.toBytes("26")//
                );
        
        put.add(//
                Bytes.toBytes("info"),//
                Bytes.toBytes("address"),//
                Bytes.toBytes("tianjing")//
                );
        
        table.put(put);
        
        table.close();
    }
    
    public static void deleteData(String tableName) throws IOException {
        HTable table = getHTableByTableName(tableName);
        Delete delete = new Delete(Bytes.toBytes("10003"));
        //delete a certain column 
//        delete.deleteColumn(Bytes.toBytes("info"), //
//                Bytes.toBytes("address"));
        
        //delete a familycolumn
                delete.deleteFamily(Bytes.toBytes("info"));
                
        table.delete(delete);
        table.close();
    }

    public static void main(String[] args) throws IOException {
        String tableName = "user";
//        HTable table = getHTableByTableName(tableName);
//        getData(tableName);
//        putData(tableName);
//        deleteData(tableName);
        
        HTable table = null;
        ResultScanner resultScanner = null;
        try{
            table = getHTableByTableName(tableName);
            
            Scan scan = new Scan();
            //the range of scan
            scan.setStartRow(Bytes.toBytes("10001"));
            scan.setStartRow(Bytes.toBytes("10004"));
            
            //scan the certain column or familycolumn
//            scan.addColumn(family, qualifier);
//            scan.addFamily(family);
            
            //another way to scan
            //Scan scan2 = new Scan(startRow, stopRow);
            
            //PrefixFilter
            //PageFilter
//            scan.setFilter(filter);
            
//            scan.setCacheBlocks(cacheBlocks);
//            scan.setCaching(caching);
            
            resultScanner = table.getScanner(scan);
            for (Result result:resultScanner) {
                System.out.println(Bytes.toString(result.getRow()));
                //System.out.println(result);
                
                for(Cell cell:result.rawCells()){
                    System.out.println(//
                       Bytes.toString(CellUtil.cloneFamily(cell)) + ":" //
                       + Bytes.toString(CellUtil.cloneQualifier(cell)) + "-->" //
                       + Bytes.toString(CellUtil.cloneValue(cell))
                    );
                }
                System.out.println("------------------------------");
            }
        }catch(Exception e){
            e.printStackTrace();
        }finally{
            IOUtils.closeStream(resultScanner);
            IOUtils.closeStream(table);
        }
    }
}