Hbase之批量数据写入


**

  * Created by similarface on 16/8/16.
  */
 
import  java.io.IOException;
 
import  org.apache.hadoop.conf.Configuration;
import  org.apache.hadoop.hbase.HBaseConfiguration;
import  org.apache.hadoop.hbase.TableName;
import  org.apache.hadoop.hbase.client.Connection;
import  org.apache.hadoop.hbase.client.ConnectionFactory;
import  org.apache.hadoop.hbase.client.Get;
import  org.apache.hadoop.hbase.client.Table;
import  org.apache.hadoop.hbase.client.Put;
import  org.apache.hadoop.hbase.client.Result;
import  org.apache.hadoop.hbase.util.Bytes;
import  org.apache.hadoop.hbase.client.BufferedMutator;
import  org.apache.hadoop.hbase.Cell;
import  org.apache.hadoop.hbase.CellUtil;
import  org.apache.hadoop.hbase.client.Mutation;
import  java.util.List;
import  java.util.ArrayList;
public  class  PutBufferExample {
     public  static  void  main(String[] args)  throws  IOException {
         //获取陪着参数
         Configuration config = HBaseConfiguration.create();
         //建立连接
         Connection connection = ConnectionFactory.createConnection(config);
         try  {
             //连接表 获取表对象
             Table t = connection.getTable(TableName.valueOf( "testtable" ));
             BufferedMutator table = connection.getBufferedMutator(TableName.valueOf( "testtable" ));
             try  {
                 Put p =  new  Put(Bytes.toBytes( "myrow-1" ));
                 //p.add(); 这个地方的add 是个过期的方法然而我并不知道Cell的用法是什么
                 p.add(Bytes.toBytes( "colfam1" ), Bytes.toBytes( "name1" ), Bytes.toBytes( "zhangsan1" ));
                 //table.put(p);
                 List<Mutation> mutations =  new  ArrayList<Mutation>();
                 mutations.add(p);
                 table.mutate(mutations);
                 //如果不flush 在后面get可能是看不见的
                 table.flush();
                 // Close your table and cluster connection.
                 Get get= new  Get(Bytes.toBytes( "myrow-1" ));
                 Result result=t.get(get);
                 for (Cell cell:result.rawCells()){
                     System.out.print( "行健: " + new  String(CellUtil.cloneRow(cell)));
                     System.out.print( "\t列簇: " + new  String(CellUtil.cloneFamily(cell)));
                     System.out.print( "\t列: " + new  String(CellUtil.cloneQualifier(cell)));
                     System.out.print( "\t值: " + new  String(CellUtil.cloneValue(cell)));
                     System.out.println( "\t时间戳: " +cell.getTimestamp());
                 }
                 System.out.print( ">>>>end" );
             finally  {
                 if  (table !=  null ) table.close();
             }
         finally  {
             connection.close();
         }
     }
}


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