JavaAPI访问Hadoop2.2HA的配置下访问Hbase0.96.2 .

1、确保Hadoop和Hbase服务已经正常启动了

2、把hbase-site.xml,core-site.xml,hdfs-site.xml配置文件放到Java工程的src目录下

3、引入相关的依赖包

4、Java Client测试访问Hbase集群

package com.hbase.test;

import java.util.ArrayList;
import java.util.List;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
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.filter.CompareFilter;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.filter.Filter;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.RegexStringComparator;
import org.apache.hadoop.hbase.filter.RowFilter;
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;

public class TestHBase {

	/**
	 * @param args
	 */
	public static Configuration configuration ;
	
	/**
	 * 初始化参配置信息
	 */
	static {
		configuration = HBaseConfiguration.create() ;
		//配置文件加载方式一
//		configuration.set("hbase.master", "10.58.51.78:60000") ;
//		configuration.set("hbase.zookeeper.quorum", "S1SF001,S1SF002,S1SF003,S1SF004,S1SF005") ;
		//配置文件加载方式二
		String filePath = "hbase-site.xml" ;
		Path path = new Path(filePath);
		configuration.addResource(path);
	}
	
	/**
	 * 根据给定的表名创建表
	 * @param tableName 表名
	 * @throws Exception 
	 */
	public static void createTable(String tableName) throws Exception {
		HBaseAdmin admin = new HBaseAdmin(configuration);
		if (admin.tableExists(tableName)) {
			admin.disableTable(tableName);
			admin.deleteTable(tableName);
			System.out.println("表已存在，先删除...");
		}
		
		HTableDescriptor tableDescriptor = new HTableDescriptor(tableName);
		tableDescriptor.addFamily(new HColumnDescriptor("cf1"));
		admin.createTable(tableDescriptor) ;
		admin.close();
	}
	
	/**
	 * 初始化数据
	 * @param tableName
	 * @throws Exception
	 */
	public static void initData(String tableName) throws Exception{
		HTable table = new HTable(configuration, tableName) ;
		for(int i=10;i<22;i++){
			String ii = String.valueOf(i);
			Put put = new Put(ii.getBytes()) ;
			put.add("cf1".getBytes(), "column1".getBytes(), "the first column".getBytes()) ;
			put.add("cf1".getBytes(), "column2".getBytes(), "the second column".getBytes()) ;
			put.add("cf1".getBytes(), "column3".getBytes(), "the third column".getBytes()) ;
			table.put(put) ;
		}
		table.close();
	}
	
	/**
	 * 删除一行数据
	 * @param tableName 表名
	 * @param rowKey rowkey
	 * @throws Exception
	 */
	public static void deleteRow(String tableName,String rowKey) throws Exception{
		HTable table = new HTable(configuration,tableName);
		Delete delete = new Delete(rowKey.getBytes());
		table.delete(delete);
	}
	
	/**
	 *  删除rowkey列表
	 * @param tableName
	 * @param rowKeys
	 * @throws Exception
	 */
	public static void deleteRowKeys(String tableName, List rowKeys) throws Exception
	{
		HTable table = new HTable(configuration, tableName) ;
		List deletes = new ArrayList();
		for(String rowKey:rowKeys){
			Delete delete = new Delete(rowKey.getBytes());
			deletes.add(delete);
		}
		table.delete(deletes);
		table.close();
	}
	
	/**
	 * 根据rowkey获取所有column值
	 * @param tableName
	 * @param rowKey
	 * @throws Exception
	 */
	public static void get(String tableName,String rowKey) throws Exception{
		HTable table = new HTable(configuration, tableName) ;
		Get get = new Get(rowKey.getBytes());
		Result result = table.get(get);
		for(KeyValue kv:result.raw()){
			System.out.println("cf="+new String(kv.getFamily())+", columnName="+new String(kv.getQualifier())+", value="+new String(kv.getValue()));
		}
	}
	
	
	
	/**
	 * 批量查询
	 * @param tableName
	 * @param startRow
	 * @param stopRow
	 * @throws Exception
	 * select column1,column2,column3 from test_table where id between ... and
	 */
	public static void scan(String tableName, String startRow, String stopRow) throws Exception {
		HTable table = new HTable(configuration, tableName);
		Scan scan = new Scan () ;
		scan.addColumn("cf1".getBytes(), "column1".getBytes()) ;
		scan.addColumn("cf1".getBytes(), "column2".getBytes()) ;
		scan.addColumn("cf1".getBytes(), "column3".getBytes()) ;
		
		//rowkey>=a && rowkey