在Eclipse中运行JAVA代码远程操作HBase的示例

下面是一个在Windows的Eclipse中通过JAVA操作一个Linux上运行的hbase的示例。
Hbase的配置需要注意下面一些要点:
1，服务器端用主机名配置hadoop和hbase，不要用IP
比如如下：
<property>  
 <name>hbase.zookeeper.quorum</name>  
 <value>hadoopsrv</value>  
</property>
2，hbase运行的机器上的机器名不能叫localhost
改/etc/sysconfig/network中的HOSTNAME
比如:
HOSTNAME=hadoopsrv
3，修改eclipse运行的windows客户端的C:\Windows\System32\drivers\etc\hosts文件.
对应到hbase运行服务器的ip,比如:
192.168.2.6 hadoopsrv
JAVA代码如下

package org.apache.hadoop.hbase;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
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.HTablePool;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.ResultScanner;
import org.apache.hadoop.hbase.client.Scan;

public class HbaseTest {
	private HBaseAdmin admin = null;
	// 定义配置对象HBaseConfiguration
	private HBaseConfiguration cfg = null;

	public HbaseTest() throws Exception {
		Configuration HBASE_CONFIG = new Configuration();

		HBASE_CONFIG.set("hbase.zookeeper.quorum", "192.168.2.6");

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

		cfg = new HBaseConfiguration(HBASE_CONFIG);

		admin = new HBaseAdmin(cfg);
	}

	// 创建一张表，指定表名，列族
	public void createTable(String tableName, String columnFarily)
			throws Exception {

		if (admin.tableExists(tableName)) {
			System.out.println(tableName + "存在！");
			System.exit(0);
		} else {
			HTableDescriptor tableDesc = new HTableDescriptor(tableName);
			tableDesc.addFamily(new HColumnDescriptor(columnFarily));
			admin.createTable(tableDesc);
			System.out.println("创建表成功！");
		}
	}

	// Hbase获取所有的表信息
	public List getAllTables() {
		List<String> tables = null;
		if (admin != null) {
			try {
				HTableDescriptor[] allTable = admin.listTables();
				if (allTable.length > 0)
					tables = new ArrayList<String>();
				for (HTableDescriptor hTableDescriptor : allTable) {
					tables.add(hTableDescriptor.getNameAsString());
					System.out.println(hTableDescriptor.getNameAsString());
				}
			} catch (IOException e) {
				e.printStackTrace();
			}
		}
		return tables;
	}

	// Hbase中往某个表中添加一条记录
	public boolean addOneRecord(String table, String key, String family,
			String col, byte[] dataIn) {
		HTablePool tp = new HTablePool(cfg, 1000);
		HTable tb = (HTable) tp.getTable(table);
		Put put = new Put(key.getBytes());
		put.add(family.getBytes(), col.getBytes(), dataIn);
		try {
			tb.put(put);
			System.out.println("插入数据条" + key + "成功！！！");
			return true;
		} catch (IOException e) {
			System.out.println("插入数据条" + key + "失败！！！");
			return false;
		}
	}

	// Hbase表中记录信息的查询
	public void getValueFromKey(String table, String key) {
		HTablePool tp = new HTablePool(cfg, 1000);
		HTable tb = (HTable) tp.getTable(table);
		Get get = new Get(key.getBytes());
		try {
			Result rs = tb.get(get);
			if (rs.raw().length == 0) {
				System.out.println("不存在关键字为" + key + "的行！!");

			} else {
				for (KeyValue kv : rs.raw()) {
					System.out.println(new String(kv.getKey()) + " "
							+ new String(kv.getValue()));
				}

			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}

	// 显示所有数据，通过HTable Scan类获取已有表的信息
	public void getAllData(String tableName) throws Exception {
		HTable table = new HTable(cfg, tableName);
		Scan scan = new Scan();
		ResultScanner rs = table.getScanner(scan);
		for (Result r : rs) {
			for (KeyValue kv : r.raw()) {
				System.out.println(new String(kv.getKey())
						+ new String(kv.getValue()));
			}
		}
	}

	// Hbase表中记录信息的删除
	public boolean deleteRecord(String table, String key) {
		HTablePool tp = new HTablePool(cfg, 1000);
		HTable tb = (HTable) tp.getTable(table);
		Delete de = new Delete(key.getBytes());
		try {
			tb.delete(de);
			return true;
		} catch (IOException e) {
			System.out.println("删除记录" + key + "异常！！！");
			return false;
		}
	}

	// Hbase中表的删除
	public boolean deleteTable(String table) {
		try {
			if (admin.tableExists(table)) {
				admin.disableTable(table);
				admin.deleteTable(table);
				System.out.println("删除表" + table + "!!!");
			}
			return true;
		} catch (IOException e) {
			System.out.println("删除表" + table + "异常!!!");
			return false;
		}
	}

	// 测试函数
	public static void main(String[] args) {
		try {
			HbaseTest hbase = new HbaseTest();
			// hbase.createTable("student", "fam1");
			// hbase.getAllTables();

			// hbase.addOneRecord("student","id1","fam1","name","Jack".getBytes());
			// hbase.addOneRecord("student","id1","fam1","address","HZ".getBytes());
			// hbase.getValueFromKey("student","id1");
			// hbase.getAllData("student");

			//hbase.deleteRecord("student", "id1");
			
			hbase.deleteTable("student");
			
		} catch (Exception e) {
			e.printStackTrace();
		}
	}
}