Hbase之批量数据写入

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云原生总监 2022-09-05 15:16:38 博主文章分类：hadoop

/**

 
 
 
 * 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();

 
 
 
 }

 
 
 
 }

 
 
 }