hbase使用-java操作

 

 

package top.liboss.hbase;

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 HBaseBasic {
    private static Configuration conf = null;
    static {
        Configuration HBASE_CONFIG = new Configuration();
        //hbase/conf/hbase-site.xmlhbase.zookeeper.quorum
        HBASE_CONFIG.set("hbase.zookeeper.quorum", "192.168.1.1");
        //hbase/conf/hbase-site.xmlhbase.zookeeper.property.clientPort
        HBASE_CONFIG.set("hbase.zookeeper.property.clientPort", "2181");
        conf = HBaseConfiguration.create(HBASE_CONFIG);
    }


    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.");
        }
    }

    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();
        }
    }

    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();
        }
    }

    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.");
    }

    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()));
        }
    }

    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 = "student";
            String[] familys = {"id", "name","score"};    //HBaseBasic.creatTable(tablename, familys);
            //add record zkb
            //HBaseBasic.addRecord(tablename,"2","id","","095832");    //HBaseBasic.addRecord(tablename,"2","name","","zmac");    //HBaseBasic.addRecord(tablename,"2","score","math","97");    //HBaseBasic.addRecord(tablename,"2","score","chinese","87");    //HBaseBasic.addRecord(tablename,"2","score","english","85");    //add record  baoniu
            System.out.println("===========get one record========");
            HBaseBasic.getOneRecord(tablename, "2");
            System.out.println("===========show all record========");
            HBaseBasic.getAllRecord(tablename);
            System.out.println("===========del one record========");
            HBaseBasic.delRecord(tablename, "2");
            HBaseBasic.getAllRecord(tablename);
        } catch (Exception e) {
            e.printStackTrace();
        }
    }


}

运行会，你将看到首先创建数据库student,其字段为
id,name,score{english,math,chinese}，然后向该数据表插入数据，再查询记录，删除记录等