HBase基本API(java)操作(增删改查)(一)

//package hbaseExec2;

/*
 * 创建一个students表,并进行相关操作
 */
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.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.Put;
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.util.Bytes;

public class HBaseJavaAPI {
	// 声明静态配置
	private static Configuration conf = null;

	static {
		conf = HBaseConfiguration.create();
		conf.set("hbase.zookeeper.quorum", "192.168.6.91");
		conf.set("hbase.zookeeper.property.clientPort", "2181");
	}

	//判断表是否存在
	private static boolean isExist(String tableName) throws IOException {
		HBaseAdmin hAdmin = new HBaseAdmin(conf);
		return hAdmin.tableExists(tableName);
	}

	// 创建数据库表
	public static void createTable(String tableName, String[] columnFamilys)
			throws Exception {
		// 新建一个数据库管理员
		HBaseAdmin hAdmin = new HBaseAdmin(conf);
		if (hAdmin.tableExists(tableName)) {
			System.out.println("表 "+tableName+" 已存在！");
			System.exit(0);
		} else {
			// 新建一个students表的描述
			HTableDescriptor tableDesc = new HTableDescriptor(tableName);
			// 在描述里添加列族
			for (String columnFamily : columnFamilys) {
				tableDesc.addFamily(new HColumnDescriptor(columnFamily));
			}
			// 根据配置好的描述建表
			hAdmin.createTable(tableDesc);
			System.out.println("创建表 "+tableName+" 成功!");
		}
	}

	// 删除数据库表
	public static void deleteTable(String tableName) throws Exception {
		// 新建一个数据库管理员
		HBaseAdmin hAdmin = new HBaseAdmin(conf);
		if (hAdmin.tableExists(tableName)) {
			// 关闭一个表
			hAdmin.disableTable(tableName);
			hAdmin.deleteTable(tableName);
			System.out.println("删除表 "+tableName+" 成功！");
		} else {
			System.out.println("删除的表 "+tableName+" 不存在！");
			System.exit(0);
		}
	}

	// 添加一条数据
	public static void addRow(String tableName, String row,
			String columnFamily, String column, String value) throws Exception {
		HTable table = new HTable(conf, tableName);
		Put put = new Put(Bytes.toBytes(row));// 指定行
		// 参数分别:列族、列、值
		put.add(Bytes.toBytes(columnFamily), Bytes.toBytes(column),
				Bytes.toBytes(value));
		table.put(put);
	}

	// 删除一条(行)数据
	public static void delRow(String tableName, String row) throws Exception {
		HTable table = new HTable(conf, tableName);
		Delete del = new Delete(Bytes.toBytes(row));
		table.delete(del);
	}

	// 删除多条数据
	public static void delMultiRows(String tableName, String[] rows)
			throws Exception {
		HTable table = new HTable(conf, tableName);
		List





 delList = new ArrayList();
		for (String row : rows) {
			Delete del = new Delete(Bytes.toBytes(row));
			delList.add(del);
		}
		table.delete(delList);
	}

	// 获取一条数据
	public static void getRow(String tableName, String row) throws Exception {
		HTable table =