Hbase java API详解

一、

几个主要 Hbase API 类和数据模型之间的对应关系:

Hbase java API详解_第1张图片

1 HBaseAdmin
关系: org.apache.hadoop.hbase.client.HBaseAdmin
作用:提供了一个接口来管理 HBase 数据库的表信息。它提供的方法包括:创建表,删 除表,列出表项,使表有效或无效,以及添加或删除表列族成员等。
https://images2015.cnblogs.com/blog/1122015/201705/1122015-20170511194405816-821856168.png

Hbase java API详解_第2张图片

2 HBaseConfiguration
关系: org.apache.hadoop.hbase.HBaseConfiguration
作用:对 HBase 进行配置

Hbase java API详解_第3张图片

3 HTableDescriptor
关系: org.apache.hadoop.hbase.HTableDescriptor
作用:包含了表的名字极其对应表的列族

Hbase java API详解_第4张图片

4 HColumnDescriptor
关系: org.apache.hadoop.hbase.HColumnDescriptor
作用:维护着关于列族的信息,例如版本号,压缩设置等。它通常在创建表或者为表添 加列族的时候使用。列族被创建后不能直接修改,只能通过删除然后重新创建的方式。
列族被删除的时候,列族里面的数据也会同时被删除。

Hbase java API详解_第5张图片

5 HTable
关系: org.apache.hadoop.hbase.client.HTable
作用:可以用来和 HBase 表直接通信。此方法对于更新操作来说是非线程安全的。

Hbase java API详解_第6张图片

Hbase java API详解_第7张图片

6 Put
关系: org.apache.hadoop.hbase.client.Put
作用:用来对单个行执行添加操作

Hbase java API详解_第8张图片

7 Get
关系: org.apache.hadoop.hbase.client.Get
作用:用来获取单个行的相关信息

Hbase java API详解_第9张图片

8 Result
关系: org.apache.hadoop.hbase.client.Result
作用:存储 Get 或者 Scan 操作后获取表的单行值。使用此类提供的方法可以直接获取值 或者各种 Map 结构( key-value 对)
Hbase java API详解_第10张图片

 二、具体增删改查    代码具体实现:

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package HbaseDome;

 

 

 

import java.util.List;

 

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.Cell;

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.TableName;

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.protobuf.generated.ZooKeeperProtos.Table;

import org.apache.hadoop.hbase.util.Bytes;

 

 

 

public class Hbasedome implements HBaseDemoInterface{

 

     

    static Configuration conf =null;

    private static final String ZKconnect="192.168.123.212:2181,192.168.123.213:2181,192.168.123.214:2181";

    static{

        conf=HBaseConfiguration.create();

        conf.set("hbase.zookeeper.quorum", ZKconnect);

    }

//  static String tableName="student";

//  static String[] family={"lie01","lie02"};

     

     

    public static void main(String[] args) {

        Hbasedome a =new Hbasedome();

         String tableName="student11";

         String[] family={"lie01","lie02"};

        try {

            HTableDescriptor htds =new HTableDescriptor(tableName);

            for(int z=0;z

                HColumnDescriptor h=new HColumnDescriptor(family[z]);

                htds.addFamily(h);

            }

//          a.descTable("table03");

//          a.createTable(tableName, htds);

//          a.descTable("table03");

//          a.getAllTables();

//          a.createTable(tableName,family);

//          a.getResult("table03", "usr001");

//          a.dropTable("user1");

//          a.getAllTables();

//          a.putData("table03", "usr005", "liezu01", "name", "liu");

//          a.getResult("table03", "usr001");

//          a.getResultScann("table03");

//          a.getResultScann("table03","");

             

            Result result = a.getResult("table03", "usr001");

            System.out.println(result.toString());

            List cells = result.listCells();

            for (int i = 0; i < cells.size(); i++) {

                Cell cell = cells.get(i);

                System.out.println(cell.toString());

    //          printCell(cell);

            }

         

//          List list = result.list();

//          for (int i = 0; i < list.size(); i++) {

//              KeyValue kv = list.get(i);

//              printKeyValye(kv);

//          }

        } catch (Exception e) {

            // TODO Auto-generated catch block

            e.printStackTrace();

        }

 

         

    }

    public static void printKeyValye(KeyValue kv) {

        System.out.println(Bytes.toString(kv.getRow()) + "\t" + Bytes.toString(kv.getFamily()) + "\t" + Bytes.toString(kv.getQualifier()) + "\t" + Bytes.toString(kv.getValue()) + "\t" + kv.getTimestamp());

    }

    public static void printCell(Cell cell) {

        System.out.println(Bytes.toString(cell.getRow()) + "\t" + Bytes.toString(cell.getFamily()) + "\t" + Bytes.toString(cell.getQualifier()) + "\t" + Bytes.toString(cell.getValue()) + "\t" + cell.getTimestamp());

    }

    //创建表

    @Override

    public void createTable(String tableName, String[] family) throws Exception {

        HBaseAdmin admin=new HBaseAdmin(conf);

        HTableDescriptor desc =new HTableDescriptor(tableName);

         

        for(int i=0;i

            desc.addFamily(new HColumnDescriptor(family[i]));

            System.out.println("11111111111"+family[i]);

        }

        if(admin.tableExists(tableName)){

            System.out.println("表已经存在,别瞎输行吗");

//          System.exit(0);

        }else{

            admin.createTable(desc);

            System.out.println("表创建成功");

        }

    }

 

    //创建表

    @Override

    public void createTable(String tableName, HTableDescriptor htds) throws Exception {

        HBaseAdmin admin=new HBaseAdmin(conf);

        boolean tableExists1 = admin.tableExists(Bytes.toBytes(tableName));

        System.out.println(tableExists1 ? "表已存在" : "表不存在");

        admin.createTable(htds);

        boolean tableExists = admin.tableExists(Bytes.toBytes(tableName));

        System.out.println(tableExists ? "创建表成功" : "创建失败");

    }

 

     

    @Override

    public void descTable(String tableName) throws Exception {

        HBaseAdmin admin=new HBaseAdmin(conf);

        HTable table=new HTable(conf, tableName);

        HTableDescriptor desc =table.getTableDescriptor();

        HColumnDescriptor[] columnFamilies = desc.getColumnFamilies();

     

        for(HColumnDescriptor t:columnFamilies){

            System.out.println(Bytes.toString(t.getName()));

        }

         

    }

 

    //// 这种方式是替换该表tableName的所有列簇

    @Override

    public void modifyTable(String tableName) throws Exception {

        HBaseAdmin admin=new HBaseAdmin(conf);

        HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(tableName));

        htd.addFamily(new HColumnDescriptor(Bytes.toBytes("cf3")));

        htd.addFamily(new HColumnDescriptor(Bytes.toBytes("cf2")));

        admin.modifyTable(tableName, htd);

 

        // 删除该表tableName当中的特定的列簇

        // admin.deleteColumn(tableName, "cf3");

 

        System.out.println("修改成功");

         

    }

 

    @Override

    public void getAllTables() throws Exception {

        HBaseAdmin admin =new HBaseAdmin(conf);

         

        String[] tableNames = admin.getTableNames();

        for(int i=0;i

            System.out.println(tableNames[i]);

        }

    }

 

    //更新数据  插入数据

    @Override

    public void putData(String tableName, String rowKey, String familyName, String columnName, String value)

            throws Exception {

        HTable htable=new HTable(conf, Bytes.toBytes(tableName));

        Put put=new Put(Bytes.toBytes(rowKey));

        put.add(Bytes.toBytes(familyName), Bytes.toBytes(columnName), Bytes.toBytes(value));

        htable.put(put);

         

    }

 

    //为表添加数据

    @Override

    public void addData(String tableName, String rowKey, String[] column1, String[] value1, String[] column2,

            String[] value2) throws Exception {

         

        Put put=new Put(Bytes.toBytes(rowKey));

        HTable htable=new HTable(conf, Bytes.toBytes(tableName));

        HColumnDescriptor[] columnFamilies = htable.getTableDescriptor().getColumnFamilies();

        for(int i=0;i<=columnFamilies.length;i++){

            String nameAsString = columnFamilies[i].getNameAsString();

            if(nameAsString.equals("lie01")){

                for(int j=0;j

                    put.add(Bytes.toBytes(nameAsString), Bytes.toBytes(column1[j]),Bytes.toBytes(value1[j]));

                }

            }

            if(nameAsString.equals("lie02")){

                for(int j=0;j

                    put.add(Bytes.toBytes(nameAsString), Bytes.toBytes(column2[j]),Bytes.toBytes(value2[j]));

                }

            }

             

        }

        htable.put(put);

        System.out.println("addData ok!");

    }

 

    //根据rowkey 查询

    @Override

    public Result getResult(String tableName, String rowKey) throws Exception {

        Get get=new Get(Bytes.toBytes(rowKey));

        HTable htable=new HTable(conf, Bytes.toBytes(tableName));

        Result result=htable.get(get);

//      for(KeyValue k:result.list()){

//          System.out.println(Bytes.toString(k.getFamily()));

//          System.out.println(Bytes.toString(k.getQualifier()));

//          System.out.println(Bytes.toString(k.getValue()));

//          System.out.println(k.getTimestamp());

//      }

        return result;

    }

 

    //查询指定的某列

    @Override

    public Result getResult(String tableName, String rowKey, String familyName, String columnName) throws Exception {

        Get get=new Get(Bytes.toBytes(rowKey));

        HTable htable=new HTable(conf, Bytes.toBytes(tableName));

        get.addColumn(Bytes.toBytes(familyName),Bytes.toBytes(columnName));

        Result result=htable.get(get);

        for(KeyValue k:result.list()){

            System.out.println(Bytes.toString(k.getFamily()));

            System.out.println(Bytes.toString(k.getQualifier()));

            System.out.println(Bytes.toString(k.getValue()));

            System.out.println(k.getTimestamp());

        }

        return result;

    }

 

     

    //遍历查询表

    @Override

    public ResultScanner getResultScann(String tableName) throws Exception {

     

        Scan scan=new Scan();

        ResultScanner rs =null;

        HTable htable=new HTable(conf, tableName);

        try{

            rs=htable.getScanner(scan);

            for(Result r: rs){

                for(KeyValue kv:r.list()){

     

                    System.out.println(Bytes.toString(kv.getRow()));

                    System.out.println(Bytes.toString(kv.getFamily()));

                    System.out.println(Bytes.toString(kv.getQualifier()));

                    System.out.println(Bytes.toString(kv.getValue()));

                    System.out.println(kv.getTimestamp());

                }

            }

        }finally{

            rs.close();

        }

        return rs;

    }

 

    @Override

    public ResultScanner getResultScann(String tableName, Scan scan) throws Exception {

         

        ResultScanner rs =null;

        HTable htable=new HTable(conf, tableName);

        try{

            rs=htable.getScanner(scan);

            for(Result r: rs){

                for(KeyValue kv:r.list()){

     

                    System.out.println(Bytes.toString(kv.getRow()));

                    System.out.println(Bytes.toString(kv.getFamily()));

                    System.out.println(Bytes.toString(kv.getQualifier()));

                    System.out.println(Bytes.toString(kv.getValue()));

                    System.out.println(kv.getTimestamp());

                }

            }

        }finally{

            rs.close();

        }      

        return rs;

    }

 

    //查询表中的某一列

    @Override

    public Result getResultByColumn(String tableName, String rowKey, String familyName, String columnName)

            throws Exception {

         

         

        HTable htable=new HTable(conf, tableName);

        Get get=new Get(Bytes.toBytes(rowKey));

        get.addColumn(Bytes.toBytes(familyName),Bytes.toBytes(columnName));

        Result result=htable.get(get);

        for(KeyValue kv: result.list()){

 

            System.out.println(Bytes.toString(kv.getFamily()));

            System.out.println(Bytes.toString(kv.getQualifier()));

            System.out.println(Bytes.toString(kv.getValue()));

            System.out.println(kv.getTimestamp());

             

        }

        return result;

    }

 

     

    //查询某列数据的某个版本

    @Override

    public Result getResultByVersion(String tableName, String rowKey, String familyName, String columnName,

            int versions) throws Exception {

     

        HTable htable=new HTable(conf, tableName);

        Get get =new Get(Bytes.toBytes(rowKey));

        get.addColumn(Bytes.toBytes(familyName), Bytes.toBytes(columnName));

        get.setMaxVersions(versions);

        Result result=htable.get(get);

         

        for(KeyValue kv: result.list()){

 

            System.out.println(Bytes.toString(kv.getFamily()));

            System.out.println(Bytes.toString(kv.getQualifier()));

            System.out.println(Bytes.toString(kv.getValue()));

            System.out.println(kv.getTimestamp());

             

        }

 

        return result;

    }

 

    //删除指定某列

    @Override

    public void deleteColumn(String tableName, String rowKey, String falilyName, String columnName) throws Exception {

 

        HTable htable=new HTable(conf, tableName);

//      Delete delete1=new Delete(Bytes.toBytes(rowKey));

        Delete de =new Delete(Bytes.toBytes(rowKey));

        de.deleteColumn(Bytes.toBytes(falilyName), Bytes.toBytes(columnName));

        htable.delete(de);

    }

 

     

    //删除指定的某个rowkey

    @Override

    public void deleteColumn(String tableName, String rowKey) throws Exception {

        HTable htable=new HTable(conf, tableName);

 

        Delete de =new Delete(Bytes.toBytes(rowKey));

         htable.delete(de);

         

    }

 

    //让该表失效

    @Override

    public void disableTable(String tableName) throws Exception {

        HBaseAdmin admin=new HBaseAdmin(conf);

        admin.disableTable(tableName);

         

    }

 

    //删除表

    @Override

    public void dropTable(String tableName) throws Exception {

         

        HBaseAdmin admin=new HBaseAdmin(conf);

        admin.disableTable(tableName);

        admin.deleteTable(tableName);

         

    }

 

}

  

  

 

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package com.ghgj.hbase.test1610;

 

import java.io.IOException;

import java.util.ArrayList;

import java.util.Iterator;

import java.util.List;

 

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.Cell;

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.TableName;

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 HBaseAPIDemo1610 implements HBaseDemoInterface {

 

    private static final String ROWKEY = "p001";

    private static final String ROWKEY2 = "p002";

    private static final String FAMILY1 = "cf1";

    private static final String FAMILY2 = "cf2";

    private static final String KEY = "name";

    private static final String VALUE = "huangbo";

 

    private static final String TABLE_NAME = "person";

    private static final String[] COLUMN_FAMILY = new String[] { FAMILY1, FAMILY2 };

 

    static Configuration conf = null;

    static HBaseAdmin admin = null;

    static HTable table = null;

 

    static {

        try {

            conf = HBaseConfiguration.create();

            conf.set("hbase.zookeeper.quorum", "hadoop03:2181,hadoop04:2181,hadoop05:2181");

            admin = new HBaseAdmin(conf);

            table = new HTable(conf, TABLE_NAME);

 

        } catch (IOException e) {

            // e.printStackTrace();

            System.out.println("报错");

        }

    }

 

    public static void main(String[] args) throws Exception {

        HBaseAPIDemo1610 hbase = new HBaseAPIDemo1610();

 

        // 测试创建表

        hbase.createTable(TABLE_NAME, COLUMN_FAMILY);

 

        // 测试创建表

        HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(TABLE_NAME));

        for (int i = 0; i < COLUMN_FAMILY.length; i++) {

            HColumnDescriptor cf1 = new HColumnDescriptor(COLUMN_FAMILY[i]);

            htd.addFamily(cf1);

        }

        hbase.createTable(TABLE_NAME, htd);

 

        // 查看表属性

        hbase.descTable(TABLE_NAME);

 

        // 查询所有的表

        hbase.getAllTables();

 

        // 测试修改表

        hbase.modifyTable(TABLE_NAME);

 

        // 插入数据

        hbase.putData(TABLE_NAME, ROWKEY, FAMILY1, KEY, VALUE);

 

        // 测试插入一堆数据

        String[] column1 = new String[] { "name1", "age", "province" };

        String[] value1 = new String[] { "huangbo", "33", "xinjiang" };

        String[] column2 = new String[] { "gender" };

        String[] value2 = new String[] { "male" };

        hbase.addData(TABLE_NAME, ROWKEY2, column1, value1, column2, value2);

 

        // 通过rowkey查询数据

        Result result = hbase.getResult(TABLE_NAME, ROWKEY2);

        System.out.println(result.toString());

        List list = result.list();

        for (int i = 0; i < list.size(); i++) {

            KeyValue kv = list.get(i);

            printKeyValye(kv);

        }

 

        // 通过rowkey, family, province查询数据

        Result result1 = hbase.getResult(TABLE_NAME, ROWKEY2, FAMILY1, "province");

        List cells = result1.listCells();

        for (int i = 0; i < cells.size(); i++) {

            Cell cell = cells.get(i);

            printCell(cell);

        }

 

        // 扫描全表数据

        ResultScanner resultScann = hbase.getResultScann(TABLE_NAME);

        printResultScanner(resultScann);

         

        /*Iterator iterator = resultScann.iterator();

        while(iterator.hasNext()){

            Result next = iterator.next();

        }*/

 

        // 通过scan扫描全表数据,scan中可以加入一些过滤条件

        Scan scan = new Scan();

        scan.setStartRow(Bytes.toBytes("user"));

        scan.setStopRow(Bytes.toBytes("zk002"));

        scan.setTimeRange(1488252774189l, 1488252774191l);

        ResultScanner resultScann1 = hbase.getResultScann(TABLE_NAME, scan);

        printResultScanner(resultScann1);

 

        // 两种方式查询最大版本数的hbase数据

        Result resultByVersion = hbase.getResultByVersion(TABLE_NAME, ROWKEY, FAMILY1, "name", 3);

        printResult(resultByVersion);

        System.out.println("-------------------");

        ResultScanner rs = hbase.getResultByVersion(ROWKEY, FAMILY1, "name", 3);

        printResultScanner(rs);

 

        // 删除表

        hbase.dropTable(TABLE_NAME);

    }

 

    public static void printResultScanner(ResultScanner resultScann) {

        for (Result result : resultScann) {

            printResult(result);

        }

    }

 

    public static void printResult(Result result) {

        List cells = result.listCells();

        for (int i = 0; i < cells.size(); i++) {

            Cell cell = cells.get(i);

            printCell(cell);

        }

    }

 

    public static void printCell(Cell cell) {

        System.out.println(Bytes.toString(cell.getRow()) + "\t" + Bytes.toString(cell.getFamily()) + "\t" + Bytes.toString(cell.getQualifier()) + "\t" + Bytes.toString(cell.getValue()) + "\t" + cell.getTimestamp());

    }

 

    public static void printKeyValye(KeyValue kv) {

        System.out.println(Bytes.toString(kv.getRow()) + "\t" + Bytes.toString(kv.getFamily()) + "\t" + Bytes.toString(kv.getQualifier()) + "\t" + Bytes.toString(kv.getValue()) + "\t" + kv.getTimestamp());

    }

 

    // create 'tablename','cf1','cf2'

    @Override

    public void createTable(String tableName, String[] family) throws Exception {

        HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(tableName));

        for (int i = 0; i < family.length; i++) {

            HColumnDescriptor cf1 = new HColumnDescriptor(family[i]);

            htd.addFamily(cf1);

        }

        admin.createTable(htd);

        boolean tableExists = admin.tableExists(Bytes.toBytes(tableName));

        System.out.println(tableExists ? "创建表成功" : "创建失败");

    }

 

    @Override

    public void createTable(String tableName, HTableDescriptor htd) throws Exception {

        admin.createTable(htd);

        boolean tableExists = admin.tableExists(Bytes.toBytes(tableName));

        System.out.println(tableExists ? "创建表成功" : "创建失败");

    }

 

    // desc 'person'

    @Override

    public void descTable(String tableName) throws Exception {

        HTableDescriptor tableDescriptor = table.getTableDescriptor();

        HColumnDescriptor[] columnFamilies = tableDescriptor.getColumnFamilies();

        for (HColumnDescriptor hcd : columnFamilies) {

            // System.out.println(hcd.toString()+"\t");

            System.out.println(Bytes.toString(hcd.getName()));

        }

    }

 

    @Override

    public void modifyTable(String tableName) throws Exception {

        // 这种方式是替换该表tableName的所有列簇

        HTableDescriptor htd = new HTableDescriptor(TableName.valueOf(tableName));

        htd.addFamily(new HColumnDescriptor(Bytes.toBytes("cf3")));

        htd.addFamily(new HColumnDescriptor(Bytes.toBytes("cf2")));

        admin.modifyTable(tableName, htd);

 

        // 删除该表tableName当中的特定的列簇

        // admin.deleteColumn(tableName, "cf3");

 

        System.out.println("修改成功");

    }

 

    // list

    @Override

    public void getAllTables() throws Exception {

        TableName[] listTableNames = admin.listTableNames();

        for (TableName tn : listTableNames) {

            System.out.println(tn.toString());

        }

    }

 

    // put 'tablename','rowkey','familyname:key','value'

    @Override

    public void putData(String tableName, String rowKey, String familyName, String columnName, String value) throws Exception {

        // HTable table = new HTable(conf, tableName);

        Put put = new Put(Bytes.toBytes(rowKey));

        put.add(Bytes.toBytes(familyName), Bytes.toBytes(columnName), Bytes.toBytes(value));

        table.put(put);

        System.out.println("插入成功");

    }

 

    /**

     * @param tableName

     *            表名

     * @param rowKey

     *            rowkey

     * @param column1

     *            第一个列簇的key数组

     * @param value1

     *            第一个列簇的value数组,key数组和value数组长度必须一样

     * @param column2

     *            第二列簇的key数组

     * @param value2

     *            第二个列簇的values数组, 同上同理

     * @throws Exception

     */

    @Override

    public void addData(String tableName, String rowKey, String[] column1, String[] value1, String[] column2, String[] value2) throws Exception {

        List puts = new ArrayList();

 

        for (int i = 0; i < column1.length; i++) {

            Put put = new Put(Bytes.toBytes(rowKey));

            put.add(Bytes.toBytes(FAMILY1), Bytes.toBytes(column1[i]), Bytes.toBytes(value1[i]));

            puts.add(put);

        }

 

        for (int i = 0; i < column2.length; i++) {

            Put put = new Put(Bytes.toBytes(rowKey));

            put.add(Bytes.toBytes(FAMILY2), Bytes.toBytes(column2[i]), Bytes.toBytes(value2[i]));

            puts.add(put);

        }

 

        table.put(puts);

        System.out.println("插入一堆数据成功");

    }

 

    // get 'tablename','rowkey'

    @Override

    public Result getResult(String tableName, String rowKey) throws Exception {

        Get get = new Get(Bytes.toBytes(rowKey));

        Result result = table.get(get);

        return result;

    }

 

    @Override

    public Result getResult(String tableName, String rowKey, String familyName, String columnName) throws Exception {

        Get get = new Get(Bytes.toBytes(rowKey));

        get.addColumn(Bytes.toBytes(familyName), Bytes.toBytes(columnName));

        Result result = table.get(get);

        return result;

    }

 

    @Override

    public ResultScanner getResultScann(String tableName) throws Exception {

        Scan scan = new Scan();

        ResultScanner scanner = table.getScanner(scan);

        // ResultScanner scanner = table.getScanner(Bytes.toBytes(FAMILY2));

        // ResultScanner scanner = table.getScanner(Bytes.toBytes(FAMILY1),

        // Bytes.toBytes("name1"));

        return scanner;

    }

 

    @Override

    public ResultScanner getResultScann(String tableName, Scan scan) throws Exception {

        return table.getScanner(scan);

    }

 

    @Override

    public Result getResultByColumn(String tableName, String rowKey, String familyName, String columnName) throws Exception {

        return null;

    }

 

    // get 'person','p001',{COLUMNS => 'cf1:name', VERSIONS => 3}

    @Override

    public Result getResultByVersion(String tableName, String rowKey, String familyName, String columnName, int versions) throws Exception {

        Get get = new Get(Bytes.toBytes(rowKey));

        get.addColumn(Bytes.toBytes(familyName), Bytes.toBytes(columnName));

        get.setMaxVersions(versions);

        Result result = table.get(get);

        return result;

    }

 

    public ResultScanner getResultByVersion(String rowKey, String familyName, String columnName, int versions) throws Exception {

        Scan scan = new Scan(Bytes.toBytes(rowKey), Bytes.toBytes(rowKey));

        scan.addColumn(Bytes.toBytes(familyName), Bytes.toBytes(columnName));

        scan.setMaxVersions(versions);

        ResultScanner scanner = table.getScanner(scan);

        return scanner;

    }

 

    @Override

    public void deleteColumn(String tableName, String rowKey, String falilyName, String columnName) throws Exception {

 

    }

 

    @Override

    public void deleteColumn(String tableName, String rowKey) throws Exception {

 

    }

 

    @Override

    public void disableTable(String tableName) throws Exception {

        admin.disableTable(tableName);

    }

 

    @Override

    public void dropTable(String tableName) throws Exception {

        try {

            admin.deleteTable(tableName);

        } catch (Exception e) {

            // e.printStackTrace();

            disableTable(tableName);

            admin.deleteTable(tableName);

            System.out.println("ssssssss");

        } finally {

            boolean tableExists = admin.tableExists(Bytes.toBytes(tableName));

            System.out.println(tableExists ? "删除失败" : "删除成功");

        }

    }

}

 

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