HBASE API

package org.jumore.test;

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 HBaseTest {

    // 声明静态配置
    private static Configuration conf = null;

    static {
        conf = HBaseConfiguration.create();
        conf.set("hbase.zookeeper.quorum", "192.168.1.141,192.168.1.143,192.168.1.145");
//        conf.set("hbase.zookeeper.quorum", "192.168.23.31,192.168.23.33,192.168.23.34");
       // conf.set("hbase.zookeeper.quorum", "172.18.203.113,172.18.203.114,172.18.203.115,172.18.203.116");
        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<Delete> delList = new ArrayList<Delete>();
        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 = new HTable(conf, tableName);
        Get get = new Get(Bytes.toBytes(row));
        Result result = table.get(get);
        // 输出结果,raw方法返回所有keyvalue数组
        for (KeyValue rowKV : result.raw()) {
            System.out.print("行名:" + new String(rowKV.getRow()) + " ");
            System.out.print("时间戳:" + rowKV.getTimestamp() + " ");
            System.out.print("列族名:" + new String(rowKV.getFamily()) + " ");
            System.out.print("列名:" + new String(rowKV.getQualifier()) + " ");
            System.out.println("值:" + new String(rowKV.getValue()));
        }
    }

    // 获取所有数据
    public static void getAllRows(String tableName) throws Exception {
        HTable table = new HTable(conf, tableName);
        Scan scan = new Scan();
        ResultScanner results = table.getScanner(scan);
        // 输出结果
        for (Result result : results) {
            for (KeyValue rowKV : result.raw()) {
//                System.out.print("行名:" + new String(rowKV.getRow()) + " ");
//                System.out.print("时间戳:" + rowKV.getTimestamp() + " ");
//                System.out.print("列族名:" + new String(rowKV.getFamily()) + " ");
//                System.out
//                        .print("列名:" + new String(rowKV.getQualifier()) + " ");
//                System.out.println("值:" + new String(rowKV.getValue()));
                String putStr = "put " + "\""+tableName+"\"" + ", " + "\"" +new String(rowKV.getRow())+ "\"" + ", " + "\""+  new String(rowKV.getFamily()) + ":" + new String(rowKV.getQualifier()) + "\""+  ", "+ "\"" + new String(rowKV.getValue())+ "\"";
                System.out.println(putStr);
            }
        }
    }

    // 主函数
//    public static void main(String[] args) {
//        try {
//            String tableName = "huym:student";
//            // 第一步：创建数据库表：“student”
//            String[] columnFamilys = { "info", "course" };
//            HBaseTest.createTable(tableName, columnFamilys);
//            // 第二步：向数据表的添加数据
//            // 添加第一行数据
//            if (isExist(tableName)) {
//                HBaseTest.addRow(tableName, "zpc", "info", "age", "20");
//                HBaseTest.addRow(tableName, "zpc", "info", "sex", "boy");
//                HBaseTest.addRow(tableName, "zpc", "course", "china", "97");
//                HBaseTest.addRow(tableName, "zpc", "course", "math", "128");
//                HBaseTest.addRow(tableName, "zpc", "course", "english", "85");
//               
//                HBaseTest.addRow(tableName, "niaopeng", "course", "english","99");
//                // 第三步：获取一条数据
//                System.out.println("**************获取一条(zpc)数据*************");
//                HBaseTest.getRow(tableName, "zpc");
//                // 第四步：获取所有数据
//                System.out.println("**************获取所有数据***************");
//                HBaseTest.getAllRows(tableName);
//
//                // 第五步：删除一条数据
//                System.out.println("************删除一条(zpc)数据************");
//                HBaseTest.delRow(tableName, "zpc");
//                HBaseTest.getAllRows(tableName);
//                // 第六步：删除多条数据
//                System.out.println("**************删除多条数据***************");
//                String rows[] = new String[] { "qingqing","xiaoxue" };
//                HBaseTest.delMultiRows(tableName, rows);
//                HBaseTest.getAllRows(tableName);
//                // 第七步：删除数据库
//                System.out.println("***************删除数据库表**************");
//                HBaseTest.deleteTable(tableName);
//                System.out.println("表"+tableName+"存在吗？"+isExist(tableName));
//            } else {
//                System.out.println(tableName + "此数据库表不存在！");
//            }
//
//        } catch (Exception e) {
//            e.printStackTrace();
//        }
//    }


   
    public static void main(String[] args) {
        try {
            String tableName = "jmnx:transaction";
         
         
            // 添加第一行数据
            if (isExist(tableName)) {
              
                // 第三步：获取一条数据
                //System.out.println("**************获取一条(zpc)数据*************");
                //HBaseTest.getRow(tableName, "platform");
                // 第四步：获取所有数据
               // System.out.println("**************获取所有数据***************");
                HBaseTest.getAllRows(tableName);


            } else {
                System.out.println(tableName + "此数据库表不存在！");
            }

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

}