hbase做简单操作练习示例

package HBaseTests;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
 
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.KeyValue;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
import org.apache.hadoop.hbase.client.Delete;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.HBaseAdmin;
import org.apache.hadoop.hbase.client.HTable;
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.client.Put;
import org.apache.hadoop.hbase.util.Bytes;
 
public class HBaseTest {
    
    private static Configuration conf = null;
     
    /**
     * 鍒濆鍖栭厤缃?     */
    static {
        Configuration HBASE_CONFIG = new Configuration();
        HBASE_CONFIG.set("mapred.jop.tracker", "hdfs://nistest.master:8021");
        HBASE_CONFIG.set("fs.default.name", "hdfs://nistest.master:9000");
        
        HBASE_CONFIG.set("hbase.zookeeper.quorum", "nistest.node1,nistest.node2,nistest.node3,nistest.node4");

           HBASE_CONFIG.set("hbase.zookeeper.property.clientPort", "2181");

        conf = HBaseConfiguration.create(HBASE_CONFIG);
    }
    
    /**
     *创建一张表
     */
    public static void creatTable(String tableName, String[] familys) throws Exception {
        HBaseAdmin admin = new HBaseAdmin(conf);
        if (admin.tableExists(tableName)) {
            System.out.println("table already exists!");
        } else {
            HTableDescriptor tableDesc = new HTableDescriptor(tableName);
            for(int i=0; i<familys.length; i++){
                tableDesc.addFamily(new HColumnDescriptor(familys[i]));
            }
            admin.createTable(tableDesc);
            System.out.println("create table " + tableName + " ok.");
        } 
    }
    
    /**
     * 删除一张表    */
    public static void deleteTable(String tableName) throws Exception {
       try {
           HBaseAdmin admin = new HBaseAdmin(conf);
           admin.disableTable(tableName);
           admin.deleteTable(tableName);
           System.out.println("delete table " + tableName + " ok.");
       } catch (MasterNotRunningException e) {
           e.printStackTrace();
       } catch (ZooKeeperConnectionException e) {
           e.printStackTrace();
       }
    }
     
    /**
     * 执行一行记录  */
    public static void addRecord (String tableName, String rowKey, String family, String qualifier, String value)
            throws Exception{
        try {
            HTable table = new HTable(conf, tableName);
            Put put = new Put(Bytes.toBytes(rowKey));
            put.add(Bytes.toBytes(family),Bytes.toBytes(qualifier),Bytes.toBytes(value));
            table.put(put);
            System.out.println("insert recored " + rowKey + " to table " + tableName +" ok.");
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
 
    /**
     * 删除一行记录    */
    public static void delRecord (String tableName, String rowKey) throws IOException{
        HTable table = new HTable(conf, tableName);
        List list = new ArrayList();
        Delete del = new Delete(rowKey.getBytes());
        list.add(del);
        table.delete(list);
        System.out.println("del recored " + rowKey + " ok.");
    }
     
    /**
     * 查找一行记录   */
    public static void getOneRecord (String tableName, String rowKey) throws IOException{
        HTable table = new HTable(conf, tableName);
        Get get = new Get(rowKey.getBytes());
        Result rs = table.get(get);
        for(KeyValue kv : rs.raw()){
            System.out.print(new String(kv.getRow()) + " " );
            System.out.print(new String(kv.getFamily()) + ":" );
            System.out.print(new String(kv.getQualifier()) + " " );
            System.out.print(kv.getTimestamp() + " " );
            System.out.println(new String(kv.getValue()));
        }
    }
     
    /**
     * 显示所有数据   */
    public static void getAllRecord (String tableName) {
        try{
             HTable table = new HTable(conf, tableName);
             Scan s = new Scan();
             ResultScanner ss = table.getScanner(s);
             for(Result r:ss){
                 for(KeyValue kv : r.raw()){
                    System.out.print(new String(kv.getRow()) + " ");
                    System.out.print(new String(kv.getFamily()) + ":");
                    System.out.print(new String(kv.getQualifier()) + " ");
                    System.out.print(kv.getTimestamp() + " ");
                    System.out.println(new String(kv.getValue()));
                 }
             }
        } catch (IOException e){
            e.printStackTrace();
        }
    }
    
    public static void  main (String [] agrs) {
        try {
            String tablename = "scores";
            String[] familys = {"grade", "course"};
            HBaseTest.creatTable(tablename, familys);
             
            //add record zkb
            HBaseTest.addRecord(tablename,"zkb","grade","","5");
            HBaseTest.addRecord(tablename,"zkb","course","","90");
            HBaseTest.addRecord(tablename,"zkb","course","math","97");
            HBaseTest.addRecord(tablename,"zkb","course","art","87");
            //add record  baoniu
            HBaseTest.addRecord(tablename,"baoniu","grade","","4");
            HBaseTest.addRecord(tablename,"baoniu","course","math","89");
             
            System.out.println("===========get one record========");
            HBaseTest.getOneRecord(tablename, "zkb");
             
            System.out.println("===========show all record========");
            HBaseTest.getAllRecord(tablename);
             
            System.out.println("===========del one record========");
            HBaseTest.delRecord(tablename, "baoniu");
            HBaseTest.getAllRecord(tablename);
             
            System.out.println("===========show all record========");
            HBaseTest.getAllRecord(tablename);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}