使用JAVA API编程实现简易Habse操作

使用JAVA API编程实现下面内容：

1.创建《王者荣耀》游戏玩家信息表gamer,包含列族personalInfo(个人信息)、recordInfo（战绩信息）、assetsInfo（资产信息）。

2.向gamer表添加数据

	personalInfo		recordInfo	assetInfo
	nickname	gameID	ranking	integral
row-001	QGhappy.Snow	000000	One	10000
row-002	XQMaster	111111	Two	20000

3.查询gamer表中所有数据

4.查找gamer表中行键为row-001，列键为personalInfo:nickname的内容

5.删除gamer表中行键为row-001，列键为personalInfo:nickname的内容

6.删除gamer表中行键为row-001的一行数据

7.删除gamer表。

1.启动Hadoop、Hbase

2.新建JAVA工程

3.导入habse/lib下的所有jarbao

4.新建HBaseEXample.class

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

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.*;
import org.apache.hadoop.hbase.client.*;

public class HBaseExample {

	/**
	 * @param args
	 */

	public static Configuration configuration;
	public static Connection connection;
	public static Admin admin;

	public static void main(String[] args) throws IOException {
		init();
		createTable("gamer",new String[] {"personalInfo","recordInfo","assetsInfo"});

		insertData("gamer","row-001","personalInfo","nickname","QGhappy.Snow");
		insertData("gamer","row-001","personalInfo","gameID","000000");
		insertData("gamer","row-001","recordInfo","ranking","One");
		insertData("gamer","row-001","recordInfo","intergral","10000");
		insertData("gamer","row-002","personalInfo","nickname","XQMaster");
		insertData("gamer","row-002","personalInfo","gameID","111111");
		insertData("gamer","row-002","recordInfo","ranking","Two");
		insertData("gamer","row-002","assetsInfo","intergral","20000");

		//queryAll("gamer");

		//query("gamer","row-001","personalInfo","nickname");

		//deleteDate("gamer","row-001","personalInfo","nickname");

		//delete("gamer");
		close();

	}

	//删除数据
	private static void deleteDate(String tableName,String rowKey,String colFamily,String col) throws IOException {
		Table table = connection.getTable(TableName.valueOf(tableName));
		Delete delete = new Delete(rowKey.getBytes());
		if(colFamily!=null){
			delete.addFamily(colFamily.getBytes());
		}
		if(col!=null){
			delete.addColumn(colFamily.getBytes(), col.getBytes());
		}
		table.delete(delete);
		close();
		System.out.println("数据成功删除！！！");
	}

	//删除表
    private static void delete(String tableName) throws IOException {

		TableName tableName2=TableName.valueOf(tableName);
		if(admin.tableExists(tableName2)){
			admin.disableTable(tableName2);
			admin.deleteTable(tableName2);
		}
		System.out.println("table已删除！！！");
		close();
	}

    //查询
	private static void query(String tableName,String rowKey,String colFamily,String col) throws IOException {
		Table table =connection.getTable(TableName.valueOf(tableName));
		Get get = new Get(rowKey.getBytes());
		get.addColumn(colFamily.getBytes(), col.getBytes());
		Result result =table.get(get);
		showCell(result);
		table.close();
	}

	//查询整个表
	private static void queryAll(String tableName) throws IllegalArgumentException, IOException {
		Table table = connection.getTable(TableName.valueOf(tableName.getBytes()));
		ResultScanner resultScanner = table.getScanner(new Scan());
		if(resultScanner!=null){
			for(Result r:resultScanner){
			showCell(r);
		  }
		}else {
			System.out.println("表中无数据！！！！");
		}
		resultScanner.close();
	}

	//打印到控制台的格式
	private static void showCell(Result result) {
		Cell[] cells= result.rawCells();
		for(Cell cell:cells){
			System.out.println("RowName:"+new String(CellUtil.cloneRow(cell)+""));
			System.out.println("Family:"+new String(CellUtil.cloneFamily(cell)+""));
			System.out.println("Qualifier:"+new String(CellUtil.cloneQualifier(cell)+""));
			System.out.println("Value:"+new String(CellUtil.cloneValue(cell)+""));
		}
	}

	//插入
	private static void insertData(String tableName,String rowKey,String colFamily,String col,String val) throws IOException {
		Table table = connection.getTable(TableName.valueOf(tableName));
		Put put = new Put(rowKey.getBytes());
		put.addColumn(colFamily.getBytes(), col.getBytes(), val.getBytes());
		table.put(put);
		table.close();
		System.out.println("数据成功导入！！！");
	}

	//创建表
	private static void createTable(String myTableName,String[] colFamily) throws IOException {
		TableName tableName = TableName.valueOf(myTableName);
		if(admin.tableExists(tableName)){
			System.out.println(tableName+"table exists!");
		}else{
			HTableDescriptor hTableDescriptor = new HTableDescriptor(tableName);
			for(String str:colFamily){
				HColumnDescriptor hColumnDescriptor= new HColumnDescriptor(str);
					hTableDescriptor.addFamily(hColumnDescriptor);
			}
			admin.createTable(hTableDescriptor);
		}
		System.out.println(tableName+"成功创建！！！！");

	}
	//初始化
	public static void init(){
    	configuration =HBaseConfiguration.create();
    	configuration.set("hbase.rootfir", "hdfs://localhost:9000/hbase");
    	try {
			connection = ConnectionFactory.createConnection(configuration);
			admin = connection.getAdmin();
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
    }

	//关闭
	private static void close() {
			try {
				if(admin!=null){
					admin.close();
				}
				if(null!=connection){
					connection.close();
				}
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
	}
}