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);
         }
     }
 }