hbase使用-java操作

 

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package cn.com.gzkit.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();   

        }  

    } 

} 

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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