java api 查询hbase

考虑到Java代码一般就是查询hbase存储的hadoop运算的结果数据，下面记录下查询的简单范例代码

package com.lvmama.crm.web.controller.csVipManager;import org.apache.hadoop.conf.Configuration;import org.apache.hadoop.hbase.HBaseConfiguration;import org.apache.hadoop.hbase.KeyValue;import org.apache.hadoop.hbase.client.*;import org.apache.hadoop.hbase.util.Bytes;import org.junit.Before;import org.junit.Test;import java.io.IOException;/** * Created by zoubin on 2017-5-22. */public class HbaseTest {    private Configuration configuration;    @Before    public void setUp(){        configuration = HBaseConfiguration.create();        configuration.set("hbase.zookeeper.quorum", "node3,node4,node5");//通过zookeeper关联上hbase    }    /**     * 根据rowkey查找数据     * @throws IOException     */    @Test    public void getResult() throws IOException {        Get get =  new Get(Bytes.toBytes("row1"));        HTable table = new HTable(configuration,Bytes.toBytes("test"));        Result result = table.get(get);        for(KeyValue keyValue: result.list()){            System.out.println("family :" + Bytes.toString(keyValue.getFamily()));            System.out.println("qualifier :"+ Bytes.toString(keyValue.getQualifier()));            System.out.println("value :"+Bytes.toString(keyValue.getValue()));            System.out.println("timestamp :" +keyValue.getTimestamp());            System.out.println("---------------------------------");        }    }    /**     * 查询指定rowkey范围的数据     * @throws IOException     */    @Test    public void getResults() throws IOException {        Scan scan = new Scan();        scan.setStartRow(Bytes.toBytes("row2"));        scan.setStopRow(Bytes.toBytes("row4"));//实验发现范围取[row2,row4),左闭右开        ResultScanner rs = null;        HTable table = new HTable(configuration, Bytes.toBytes("test"));        rs = table.getScanner(scan);        for(Result r : rs){            for (KeyValue kv : r.list()){                System.out.println("row:" + Bytes.toString(kv.getRow()));                System.out.println("family:"+ Bytes.toString(kv.getFamily()));                System.out.println("qualifier:"+ Bytes.toString(kv.getQualifier()));                System.out.println("value:" + Bytes.toString(kv.getValue()));                System.out.println("timestamp:" + kv.getTimestamp());                System.out.println("-------------------------------------------");            }        }    }}