HBase的简单java操作

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java简单操作hbase的表

 import org.apache.hadoop.conf.Configuration;
 import org.apache.hadoop.hbase.*;
 import org.apache.hadoop.hbase.client.*;
 import org.apache.hadoop.hbase.filter.CompareFilter;
 import org.apache.hadoop.hbase.filter.FilterList;
 import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;
 import org.junit.Before;
 import org.junit.Test;

 import java.io.IOException;
 import java.util.ArrayList;
 import java.util.Iterator;
 import java.util.Random;

 /**
  * Created by Edward on 2016/6/19.
  */
 public class TestHbase {

     public static Configuration conf = null;
     public static TableName table = TableName.valueOf("phone");
     public static Random random = new Random();

     @Before
     public void setup()
     {
         //通过zookeeper集群，访问hbase
         conf = HBaseConfiguration.create();
         conf.set("hbase.zookeeper.quorum", "node1,node2,node3");
         System.out.println("setup");
     }

     @Test
     public void createTable() throws IOException {
         HBaseAdmin hBaseAdmin = new HBaseAdmin(conf);
        if(hBaseAdmin.tableExists(table)) {
             hBaseAdmin.disableTable(table);
             hBaseAdmin.deleteTable(table);
         }
         //表
         HTableDescriptor hTableDescriptor = new HTableDescriptor(table);
         //列族 cf1
         HColumnDescriptor hColumnDescriptor = new HColumnDescriptor("cf1");
         hColumnDescriptor.setBlockCacheEnabled(true);
         hColumnDescriptor.setBlocksize(128000);
         hColumnDescriptor.setMaxVersions(10);
         //表增加列族
         hTableDescriptor.addFamily(hColumnDescriptor);
         hBaseAdmin.createTable(hTableDescriptor);
     }

     @Test
     /**
      * 插入数据
      */
     public void insert() throws IOException {

         //创建htable对象
         HTable hTable = new HTable(conf, this.table);
         ArrayList<Put> list = new ArrayList<Put>();

         for(int i = 0; i<1000; i++)
         {
             //row_key
             Put put = new Put(String.valueOf(i).getBytes());
             //column,value
             put.add("cf1".getBytes(),"name".getBytes(),"ls".getBytes());
             put.add("cf1".getBytes(),"age".getBytes(), String.valueOf(i%100).getBytes());
             //把每个put对象放到列表中
             list.add(put);
         }
         //把信息放到表中
         hTable.put(list);
     }

     @Test
     /**
      * 查询
      */
     public void search() throws IOException
     {

         HTable hTable = new HTable(conf, this.table);
         // 创建row_key对应的get对象
         Get get = new Get("123".getBytes());
         // 获取get结果
         Result result = hTable.get(get);
         //获取 column latest cell
         Cell columnLatestCell = result.getColumnLatestCell("cf1".getBytes(), "name".getBytes());
         //使用 CellUtil 获取值
         byte[] bytes = CellUtil.cloneValue(columnLatestCell);
         System.out.println(new String(bytes));
     }

     @Test
     /**
      *  通过scan方法获取数据
      * **/
     public void search1() throws IOException
     {
         HTable hTable = new HTable(conf, this.table);
         //设置scan范围
         Scan scan = new Scan("400".getBytes(),"450".getBytes());
         //通过scan得到result scanner
         ResultScanner scanner = hTable.getScanner(scan);
         //使用迭代器
         Iterator<Result> iterator = scanner.iterator();

         while(iterator.hasNext())
         {
             Result result= iterator.next();
             Cell columnLatestCell = result.getColumnLatestCell("cf1".getBytes(), "age".getBytes());
             //获取列族中列对应的值
             byte[] bytes = CellUtil.cloneValue(columnLatestCell);
             //获取row_key
             byte[] bytes1 = CellUtil.cloneRow(columnLatestCell);
             System.out.println(new String(bytes)+" "+new String(bytes1));
         }
     }
 }