HBase学习之路（四）HBase的API操作-白红宇

HBase学习之路（四）HBase的API操作
阅读量：5835 次
发布时间：2019-06-18
本文共 18469 字，大约阅读时间需要 61 分钟。
Eclipse环境搭建

具体的jar的引入方式可以参考http://www.cnblogs.com/qingyunzong/p/8623309.html
HBase API操作表和数据

1 import java.io.IOException;  2 import java.util.Date;  3   4 import org.apache.hadoop.conf.Configuration;  5 import org.apache.hadoop.hbase.HBaseConfiguration;  6 import org.apache.hadoop.hbase.HColumnDescriptor;  7 import org.apache.hadoop.hbase.HTableDescriptor;  8 import org.apache.hadoop.hbase.TableName;  9 import org.apache.hadoop.hbase.client.Admin; 10 import org.apache.hadoop.hbase.client.Connection; 11 import org.apache.hadoop.hbase.client.ConnectionFactory; 12 import org.apache.hadoop.hbase.client.Delete; 13 import org.apache.hadoop.hbase.client.Get; 14 import org.apache.hadoop.hbase.client.Put; 15 import org.apache.hadoop.hbase.client.Result; 16 import org.apache.hadoop.hbase.client.ResultScanner; 17 import org.apache.hadoop.hbase.client.Scan; 18 import org.apache.hadoop.hbase.client.Table; 19  20 import com.study.hbase.service.HBaseUtils; 21  22 public class HBaseUtilsImpl implements HBaseUtils { 23  24     private static final String ZK_CONNECT_KEY = "hbase.zookeeper.quorum"; 25     private static final String ZK_CONNECT_VALUE = "hadoop1:2181,hadoop2:2181,hadoop3:2181"; 26  27     private static Connection conn = null; 28     private static Admin admin = null; 29  30     public static void main(String[] args) throws Exception { 31          32         getConnection(); 33         getAdmin(); 34          35         HBaseUtilsImpl hbu = new HBaseUtilsImpl(); 36          37          38         //hbu.getAllTables(); 39          40         //hbu.descTable("people"); 41          42         //String[] infos = {"info","family"}; 43         //hbu.createTable("people", infos); 44          45         //String[] add = {"cs1","cs2"}; 46         //String[] remove = {"cf1","cf2"}; 47          48         //HColumnDescriptor hc = new HColumnDescriptor("sixsixsix"); 49          50         //hbu.modifyTable("stu",hc); 51         //hbu.getAllTables(); 52  53          54         hbu.putData("huoying", "rk001", "cs2", "name", "aobama",new Date().getTime()); 55         hbu.getAllTables(); 56          57         conn.close(); 58     } 59  60     // 获取连接 61     public static Connection getConnection() { 62         // 创建一个可以用来管理hbase配置信息的conf对象 63         Configuration conf = HBaseConfiguration.create(); 64         // 设置当前的程序去寻找的hbase在哪里 65         conf.set(ZK_CONNECT_KEY, ZK_CONNECT_VALUE); 66         try { 67             conn = ConnectionFactory.createConnection(conf); 68         } catch (IOException e) { 69             e.printStackTrace(); 70         } 71         return conn; 72     } 73  74     // 获取管理员对象 75     public static Admin getAdmin() { 76         try { 77             admin = conn.getAdmin(); 78         } catch (IOException e) { 79             e.printStackTrace(); 80         } 81         return admin; 82     } 83  84     // 查询所有表 85     @Override 86     public void getAllTables() throws Exception { 87         //获取列簇的描述信息 88         HTableDescriptor[] listTables = admin.listTables(); 89         for (HTableDescriptor listTable : listTables) { 90             //转化为表名 91             String tbName = listTable.getNameAsString(); 92             //获取列的描述信息 93             HColumnDescriptor[] columnFamilies = listTable.getColumnFamilies(); 94             System.out.println("tableName:"+tbName); 95             for(HColumnDescriptor columnFamilie : columnFamilies) { 96                 //获取列簇的名字 97                 String columnFamilyName = columnFamilie.getNameAsString(); 98                 System.out.print("\t"+"columnFamilyName:"+columnFamilyName); 99             }100             System.out.println();101         }102 103     }104 105     // 创建表，传参，表名和列簇的名字106     @Override107     public void createTable(String tableName, String[] family) throws Exception {108         109         TableName name = TableName.valueOf(tableName);110         //判断表是否存在111         if(admin.tableExists(name)) {112             System.out.println("table已经存在！");113         }else {114             //表的列簇示例115             HTableDescriptor htd = new HTableDescriptor(name);116             //向列簇中添加列的信息117             for(String str : family) {118                 HColumnDescriptor hcd = new HColumnDescriptor(str);119                 htd.addFamily(hcd);120             }121             //创建表122             admin.createTable(htd);123             //判断表是否创建成功124             if(admin.tableExists(name)) {125                 System.out.println("table创建成功");126             }else {127                 System.out.println("table创建失败");128             }129         }    130         131     }132 133     // 创建表，传参:封装好的多个列簇134     @Override135     public void createTable(HTableDescriptor htds) throws Exception {136         //获得表的名字137         String tbName = htds.getNameAsString();138         139         admin.createTable(htds);140     }141 142     // 创建表，传参，表名和封装好的多个列簇143     @Override144     public void createTable(String tableName, HTableDescriptor htds) throws Exception {145 146         TableName name = TableName.valueOf(tableName);147         148         if(admin.tableExists(name)) {149             System.out.println("table已经存在！");150         }else {151             admin.createTable(htds);152             boolean flag = admin.tableExists(name);153             System.out.println(flag ? "创建成功" : "创建失败");154         }155         156     }157 158     159     // 查看表的列簇属性160     @Override161     public void descTable(String tableName) throws Exception {162         //转化为表名163         TableName name = TableName.valueOf(tableName);164         //判断表是否存在165         if(admin.tableExists(name)) {166             //获取表中列簇的描述信息167             HTableDescriptor tableDescriptor = admin.getTableDescriptor(name);168             //获取列簇中列的信息169             HColumnDescriptor[] columnFamilies = tableDescriptor.getColumnFamilies();170             for(HColumnDescriptor columnFamily : columnFamilies) {171                 System.out.println(columnFamily);172             }173             174         }else {175             System.out.println("table不存在");176         }177         178     }179 180     // 判断表存在不存在181     @Override182     public boolean existTable(String tableName) throws Exception {183         TableName name = TableName.valueOf(tableName);184         return admin.tableExists(name);185     }186 187     // disable表188     @Override189     public void disableTable(String tableName) throws Exception {190         191         TableName name = TableName.valueOf(tableName);192         193         if(admin.tableExists(name)) {194             if(admin.isTableEnabled(name)) {195                 admin.disableTable(name);196             }else {197                 System.out.println("table不是活动状态");198             }199         }else {200             System.out.println("table不存在");201         }202             203     }204 205     // drop表206     @Override207     public void dropTable(String tableName) throws Exception {208         //转化为表名209         TableName name = TableName.valueOf(tableName);210         //判断表是否存在211         if(admin.tableExists(name)) {212             //判断表是否处于可用状态213             boolean tableEnabled = admin.isTableEnabled(name);214             215             if(tableEnabled) {216                 //使表变成不可用状态217                 admin.disableTable(name);218             }219             //删除表220             admin.deleteTable(name);221             //判断表是否存在222             if(admin.tableExists(name)) {223                 System.out.println("删除失败");224             }else {225                 System.out.println("删除成功");226             }227             228         }else {229             System.out.println("table不存在");230         } 231         232         233     }234     235     // 修改表(增加和删除)236     @Override237     public void modifyTable(String tableName) throws Exception {238         //转化为表名239         TableName name = TableName.valueOf(tableName);240         //判断表是否存在241         if(admin.tableExists(name)) {242             //判断表是否可用状态243             boolean tableEnabled = admin.isTableEnabled(name);244             245             if(tableEnabled) {246                 //使表变成不可用247                 admin.disableTable(name);248             }249             //根据表名得到表250             HTableDescriptor tableDescriptor = admin.getTableDescriptor(name);251             //创建列簇结构对象252             HColumnDescriptor columnFamily1 = new HColumnDescriptor("cf1".getBytes());253             HColumnDescriptor columnFamily2 = new HColumnDescriptor("cf2".getBytes());254             255             tableDescriptor.addFamily(columnFamily1);256             tableDescriptor.addFamily(columnFamily2);257             //替换该表所有的列簇258             admin.modifyTable(name, tableDescriptor);259             260         }else {261             System.out.println("table不存在");262         } 263     }264 265     // 修改表(增加和删除)266     @Override267     public void modifyTable(String tableName, String[] addColumn, String[] removeColumn) throws Exception {268         //转化为表名269         TableName name = TableName.valueOf(tableName);270         //判断表是否存在271         if(admin.tableExists(name)) {272             //判断表是否可用状态273             boolean tableEnabled = admin.isTableEnabled(name);274             275             if(tableEnabled) {276                 //使表变成不可用277                 admin.disableTable(name);278             }279             //根据表名得到表280             HTableDescriptor tableDescriptor = admin.getTableDescriptor(name);281             //创建列簇结构对象，添加列282             for(String add : addColumn) {283                 HColumnDescriptor addColumnDescriptor = new HColumnDescriptor(add);284                 tableDescriptor.addFamily(addColumnDescriptor);285             }286             //创建列簇结构对象，删除列287             for(String remove : removeColumn) {288                 HColumnDescriptor removeColumnDescriptor = new HColumnDescriptor(remove);289                 tableDescriptor.removeFamily(removeColumnDescriptor.getName());290             }291             292             admin.modifyTable(name, tableDescriptor);293             294             295         }else {296             System.out.println("table不存在");297         } 298         299     }300 301     @Override302     public void modifyTable(String tableName, HColumnDescriptor hcds) throws Exception {303         //转化为表名304         TableName name = TableName.valueOf(tableName);305         //根据表名得到表306         HTableDescriptor tableDescriptor = admin.getTableDescriptor(name);307         //获取表中所有的列簇信息308         HColumnDescriptor[] columnFamilies = tableDescriptor.getColumnFamilies();309         310         boolean flag = false;311         //判断参数中传入的列簇是否已经在表中存在312         for(HColumnDescriptor columnFamily : columnFamilies) {313             if(columnFamily.equals(hcds)) {314                 flag = true;315             }316         }    317         //存在提示，不存在直接添加该列簇信息318         if(flag) {319             System.out.println("该列簇已经存在");320         }else {321             tableDescriptor.addFamily(hcds);322             admin.modifyTable(name, tableDescriptor);323         }324         325     }326 327     328     /**添加数据329     *tableName:    表明330     *rowKey:    行键331     *familyName:列簇332     *columnName:列名333     *value:        值334     */335     @Override336     public void putData(String tableName, String rowKey, String familyName, String columnName, String value)337             throws Exception {338         //转化为表名339         TableName name = TableName.valueOf(tableName);340         //添加数据之前先判断表是否存在，不存在的话先创建表341         if(admin.tableExists(name)) {342         343         }else {344             //根据表明创建表结构345             HTableDescriptor tableDescriptor = new HTableDescriptor(name);346             //定义列簇的名字347             HColumnDescriptor columnFamilyName = new HColumnDescriptor(familyName);348             tableDescriptor.addFamily(columnFamilyName);349             admin.createTable(tableDescriptor);350         351         }352 353         Table table = conn.getTable(name);354         Put put = new Put(rowKey.getBytes());355         356         put.addColumn(familyName.getBytes(), columnName.getBytes(), value.getBytes());357         table.put(put);358 359     }360 361     @Override362     public void putData(String tableName, String rowKey, String familyName, String columnName, String value,363             long timestamp) throws Exception {364 365         // 转化为表名366         TableName name = TableName.valueOf(tableName);367         // 添加数据之前先判断表是否存在，不存在的话先创建表368         if (admin.tableExists(name)) {369 370         } else {371             // 根据表明创建表结构372             HTableDescriptor tableDescriptor = new HTableDescriptor(name);373             // 定义列簇的名字374             HColumnDescriptor columnFamilyName = new HColumnDescriptor(familyName);375             tableDescriptor.addFamily(columnFamilyName);376             admin.createTable(tableDescriptor);377 378         }379 380         Table table = conn.getTable(name);381         Put put = new Put(rowKey.getBytes());382 383         //put.addColumn(familyName.getBytes(), columnName.getBytes(), value.getBytes());384         put.addImmutable(familyName.getBytes(), columnName.getBytes(), timestamp, value.getBytes());385         table.put(put);386 387     }388 389 390     // 根据rowkey查询数据391     @Override392     public Result getResult(String tableName, String rowKey) throws Exception {393         394         Result result;395         TableName name = TableName.valueOf(tableName);396         if(admin.tableExists(name)) {397             Table table = conn.getTable(name);398             Get get = new Get(rowKey.getBytes());399             result = table.get(get);400             401         }else {402             result = null;403         }404         405         return result;406     }407 408     // 根据rowkey查询数据409     @Override410     public Result getResult(String tableName, String rowKey, String familyName) throws Exception {411         Result result;412         TableName name = TableName.valueOf(tableName);413         if(admin.tableExists(name)) {414             Table table = conn.getTable(name);415             Get get = new Get(rowKey.getBytes());416             get.addFamily(familyName.getBytes());417             result = table.get(get);418             419         }else {420             result = null;421         }422         423         return result;424     }425 426     // 根据rowkey查询数据427     @Override428     public Result getResult(String tableName, String rowKey, String familyName, String columnName) throws Exception {429         430         Result result;431         TableName name = TableName.valueOf(tableName);432         if(admin.tableExists(name)) {433             Table table = conn.getTable(name);434             Get get = new Get(rowKey.getBytes());435             get.addColumn(familyName.getBytes(), columnName.getBytes());436             result = table.get(get);437             438         }else {439             result = null;440         }441         442         return result;443     }444 445     // 查询指定version446     @Override447     public Result getResultByVersion(String tableName, String rowKey, String familyName, String columnName,448             int versions) throws Exception {449         450         Result result;451         TableName name = TableName.valueOf(tableName);452         if(admin.tableExists(name)) {453             Table table = conn.getTable(name);454             Get get = new Get(rowKey.getBytes());455             get.addColumn(familyName.getBytes(), columnName.getBytes());456             get.setMaxVersions(versions);457             result = table.get(get);458             459         }else {460             result = null;461         }462         463         return result;464     }465 466     // scan全表数据467     @Override468     public ResultScanner getResultScann(String tableName) throws Exception {469         470         ResultScanner result;471         TableName name = TableName.valueOf(tableName);472         if(admin.tableExists(name)) {473             Table table = conn.getTable(name);474             Scan scan = new Scan();475             result = table.getScanner(scan);476             477         }else {478             result = null;479         }480         481         return result;482     }483 484     // scan全表数据485     @Override486     public ResultScanner getResultScann(String tableName, Scan scan) throws Exception {487         488         ResultScanner result;489         TableName name = TableName.valueOf(tableName);490         if(admin.tableExists(name)) {491             Table table = conn.getTable(name);492             result = table.getScanner(scan);493             494         }else {495             result = null;496         }497         498         return result;499     }500 501     // 删除数据（指定的列）502     @Override503     public void deleteColumn(String tableName, String rowKey) throws Exception {504         505         TableName name = TableName.valueOf(tableName);506         if(admin.tableExists(name)) {507             Table table = conn.getTable(name);508             Delete delete = new Delete(rowKey.getBytes());509             table.delete(delete);510         511         }else {512             System.out.println("table不存在");513         }514         515         516     }517 518     // 删除数据（指定的列）519     @Override520     public void deleteColumn(String tableName, String rowKey, String falilyName) throws Exception {521         522         TableName name = TableName.valueOf(tableName);523         if(admin.tableExists(name)) {524             Table table = conn.getTable(name);525             Delete delete = new Delete(rowKey.getBytes());526             delete.addFamily(falilyName.getBytes());527             table.delete(delete);528         529         }else {530             System.out.println("table不存在");531         }532         533     }534 535     // 删除数据（指定的列）536     @Override537     public void deleteColumn(String tableName, String rowKey, String falilyName, String columnName) throws Exception {538         TableName name = TableName.valueOf(tableName);539         if(admin.tableExists(name)) {540             Table table = conn.getTable(name);541             Delete delete = new Delete(rowKey.getBytes());542             delete.addColumn(falilyName.getBytes(), columnName.getBytes());543             table.delete(delete);544         545         }else {546             System.out.println("table不存在");547         }548     }549 550 }
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