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HBase-java api 基本操作
使用的是完全分布式，详细信息为：
操作的Java 代码（抄的别人的）
1 package org.admln.hbase; 2 3 import java.util.ArrayList; 4 import java.util.List; 5 6 import org.apache.hadoop.conf.Configuration; 7 import org.apache.hadoop.hbase.HBaseConfiguration; 8 import org.apache.hadoop.hbase.HColumnDescriptor; 9 import org.apache.hadoop.hbase.HTableDescriptor; 10 import org.apache.hadoop.hbase.KeyValue; 11 import org.apache.hadoop.hbase.TableName; 12 import org.apache.hadoop.hbase.client.Delete; 13 import org.apache.hadoop.hbase.client.Get; 14 import org.apache.hadoop.hbase.client.HBaseAdmin; 15 import org.apache.hadoop.hbase.client.HTable; 16 import org.apache.hadoop.hbase.client.Put; 17 import org.apache.hadoop.hbase.client.Result; 18 import org.apache.hadoop.hbase.client.ResultScanner; 19 import org.apache.hadoop.hbase.client.Scan; 20 import org.apache.hadoop.hbase.util.Bytes; 21 22 public class OperateTable { 23 // 声明静态配置 24 private static Configuration conf = null; 25 static { 26 conf = HBaseConfiguration.create(); 27 conf.set("hbase.zookeeper.quorum", "slave1"); 28 conf.set("hbase.zookeeper.property.clientPort", "2181"); 29 } 30 31 // 创建数据库表 32 public static void createTable(String tableName, String[] columnFamilys) 33 throws Exception { 34 // 新建一个数据库管理员 35 HBaseAdmin hAdmin = new HBaseAdmin(conf); 36 37 if (hAdmin.tableExists(tableName)) { 38 System.out.println("表已经存在"); 39 System.exit(0); 40 } else { 41 // 新建一个 scores 表的描述 42 HTableDescriptor tableDesc = new HTableDescriptor( 43 TableName.valueOf(tableName)); 44 // 在描述里添加列族 45 for (String columnFamily : columnFamilys) { 46 tableDesc.addFamily(new HColumnDescriptor(columnFamily)); 47 } 48 // 根据配置好的描述建表 49 hAdmin.createTable(tableDesc); 50 System.out.println("创建表成功"); 51 } 52 } 53 54 // 删除数据库表 55 public static void deleteTable(String tableName) throws Exception { 56 // 新建一个数据库管理员 57 HBaseAdmin hAdmin = new HBaseAdmin(conf); 58 59 if (hAdmin.tableExists(tableName)) { 60 // 关闭一个表 61 hAdmin.disableTable(tableName); 62 // 删除一个表 63 hAdmin.deleteTable(tableName); 64 System.out.println("删除表成功"); 65 66 } else { 67 System.out.println("删除的表不存在"); 68 System.exit(0); 69 } 70 } 71 72 // 添加一条数据 73 public static void addRow(String tableName, String row, 74 String columnFamily, String column, String value) throws Exception { 75 HTable table = new HTable(conf, tableName); 76 Put put = new Put(Bytes.toBytes(row)); 77 // 参数出分别：列族、列、值 78 put.add(Bytes.toBytes(columnFamily), Bytes.toBytes(column), 79 Bytes.toBytes(value)); 80 table.put(put); 81 } 82 83 // 删除一条数据 84 public static void delRow(String tableName, String row) throws Exception { 85 HTable table = new HTable(conf, tableName); 86 Delete del = new Delete(Bytes.toBytes(row)); 87 table.delete(del); 88 } 89 90 // 删除多条数据 91 public static void delMultiRows(String tableName, String[] rows) 92 throws Exception { 93 HTable table = new HTable(conf, tableName); 94 List<Delete> list = new ArrayList<Delete>(); 95 96 for (String row : rows) { 97 Delete del = new Delete(Bytes.toBytes(row)); 98 list.add(del); 99 }100 101 table.delete(list);102 }103 104 // get row105 public static void getRow(String tableName, String row) throws Exception {106 HTable table = new HTable(conf, tableName);107 Get get = new Get(Bytes.toBytes(row));108 Result result = table.get(get);109 // 输出结果110 for (KeyValue rowKV : result.raw()) {111 System.out.print("Row Name: " + new String(rowKV.getRow()) + " ");112 System.out.print("Timestamp: " + rowKV.getTimestamp() + " ");113 System.out.print("column Family: " + new String(rowKV.getFamily())114 + " ");115 System.out.print("Row Name: " + new String(rowKV.getQualifier())116 + " ");117 System.out.println("Value: " + new String(rowKV.getValue()) + " ");118 }119 }120 121 // get all records122 public static void getAllRows(String tableName) throws Exception {123 HTable table = new HTable(conf, tableName);124 Scan scan = new Scan();125 ResultScanner results = table.getScanner(scan);126 // 输出结果127 for (Result result : results) {128 for (KeyValue rowKV : result.raw()) {129 System.out.print("Row Name: " + new String(rowKV.getRow())130 + " ");131 System.out.print("Timestamp: " + rowKV.getTimestamp() + " ");132 System.out.print("column Family: "133 + new String(rowKV.getFamily()) + " ");134 System.out.print("Row Name: "135 + new String(rowKV.getQualifier()) + " ");136 System.out.println("Value: " + new String(rowKV.getValue())137 + " ");138 }139 }140 }141 142 // main143 public static void main(String[] args) {144 try {145 String tableName = "users2";146 147 // 第一步：创建数据库表：“users2”148 String[] columnFamilys = { "info", "course" };149 OperateTable.createTable(tableName, columnFamilys);150 151 // 第二步：向数据表的添加数据152 // 添加第一行数据153 OperateTable.addRow(tableName, "tht", "info", "age", "20");154 OperateTable.addRow(tableName, "tht", "info", "sex", "boy");155 OperateTable.addRow(tableName, "tht", "course", "china", "97");156 OperateTable.addRow(tableName, "tht", "course", "math", "128");157 OperateTable.addRow(tableName, "tht", "course", "english", "85");158 // 添加第二行数据159 OperateTable.addRow(tableName, "xiaoxue", "info", "age", "19");160 OperateTable.addRow(tableName, "xiaoxue", "info", "sex", "boy");161 OperateTable.addRow(tableName, "xiaoxue", "course", "china", "90");162 OperateTable.addRow(tableName, "xiaoxue", "course", "math", "120");163 OperateTable164 .addRow(tableName, "xiaoxue", "course", "english", "90");165 // 添加第三行数据166 OperateTable.addRow(tableName, "qingqing", "info", "age", "18");167 OperateTable.addRow(tableName, "qingqing", "info", "sex", "girl");168 OperateTable169 .addRow(tableName, "qingqing", "course", "china", "100");170 OperateTable.addRow(tableName, "qingqing", "course", "math", "100");171 OperateTable.addRow(tableName, "qingqing", "course", "english",172 "99");173 // 第三步：获取一条数据174 System.out.println("获取一条数据");175 OperateTable.getRow(tableName, "tht");176 // 第四步：获取所有数据177 System.out.println("获取所有数据");178 OperateTable.getAllRows(tableName);179 // 第五步：删除一条数据180 System.out.println("删除一条数据");181 OperateTable.delRow(tableName, "tht");182 OperateTable.getAllRows(tableName);183 // 第六步：删除多条数据184 System.out.println("删除多条数据");185 String[] rows = { "xiaoxue", "qingqing" };186 OperateTable.delMultiRows(tableName, rows);187 OperateTable.getAllRows(tableName);188 // 第八步：删除数据库189 System.out.println("删除数据库");190 OperateTable.deleteTable(tableName);191 192 } catch (Exception err) {193 err.printStackTrace();194 }195 }196 }
运行结果为：
1 2014-11-11 14:09:00,368 WARN util.NativeCodeLoader (NativeCodeLoader.java:<clinit>(62)) - Unable to load native-hadoop library for your platform... using builtin-java classes where applicable 2 2014-11-11 14:09:00,455 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:zookeeper.version=3.4.5-1392090, built on 09/30/2012 17:52 GMT 3 2014-11-11 14:09:00,455 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:host.name=WZJ-20140910JYZ 4 2014-11-11 14:09:00,455 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.version=1.7.0_72 5 2014-11-11 14:09:00,455 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.vendor=Oracle Corporation 6 2014-11-11 14:09:00,455 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.home=C:\Program Files (x86)\Java\jre7 7 2014-11-11 14:09:00,455 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.class.path= 。。。省略 8 2014-11-11 14:09:00,456 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.io.tmpdir=C:\Users\ADMINI~1\AppData\Local\Temp 9 2014-11-11 14:09:00,456 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:java.compiler=<NA> 10 2014-11-11 14:09:00,456 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.name=Windows 7 11 2014-11-11 14:09:00,456 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.arch=x86 12 2014-11-11 14:09:00,456 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:os.version=6.1 13 2014-11-11 14:09:00,456 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.name=Administrator 14 2014-11-11 14:09:00,456 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.home=C:\Users\Administrator 15 2014-11-11 14:09:00,456 INFO zookeeper.ZooKeeper (Environment.java:logEnv(100)) - Client environment:user.dir=D:\eclipseWorkspace32\hbase 16 2014-11-11 14:09:00,458 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=hconnection-0x21801b 17 2014-11-11 14:09:00,482 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181 18 2014-11-11 14:09:00,498 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error) 19 2014-11-11 14:09:00,500 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session 20 2014-11-11 14:09:00,513 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d6002d, negotiated timeout = 90000 21 2014-11-11 14:09:00,680 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=catalogtracker-on-hconnection-0x21801b 22 2014-11-11 14:09:00,683 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=catalogtracker-on-hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181 23 2014-11-11 14:09:00,683 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error) 24 2014-11-11 14:09:00,684 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session 25 2014-11-11 14:09:00,686 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d6002e, negotiated timeout = 90000 26 2014-11-11 14:09:00,711 INFO Configuration.deprecation (Configuration.java:warnOnceIfDeprecated(840)) - hadoop.native.lib is deprecated. Instead, use io.native.lib.available 27 2014-11-11 14:09:01,078 INFO zookeeper.ZooKeeper (ZooKeeper.java:close(684)) - Session: 0x1499d5df1d6002e closed 28 2014-11-11 14:09:01,078 INFO zookeeper.ClientCnxn (ClientCnxn.java:run(509)) - EventThread shut down 29 2014-11-11 14:09:01,248 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=catalogtracker-on-hconnection-0x21801b 30 2014-11-11 14:09:01,250 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=catalogtracker-on-hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181 31 2014-11-11 14:09:01,251 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error) 32 2014-11-11 14:09:01,252 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session 33 2014-11-11 14:09:01,254 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d6002f, negotiated timeout = 90000 34 2014-11-11 14:09:01,263 INFO zookeeper.ZooKeeper (ZooKeeper.java:close(684)) - Session: 0x1499d5df1d6002f closed 35 2014-11-11 14:09:01,263 INFO zookeeper.ClientCnxn (ClientCnxn.java:run(509)) - EventThread shut down 36 创建表成功 37 获取一条数据 38 Row Name: tht Timestamp: 1415686141316 column Family: course Row Name: china Value: 97 39 Row Name: tht Timestamp: 1415686141343 column Family: course Row Name: english Value: 85 40 Row Name: tht Timestamp: 1415686141340 column Family: course Row Name: math Value: 128 41 Row Name: tht Timestamp: 1415686141303 column Family: info Row Name: age Value: 20 42 Row Name: tht Timestamp: 1415686141313 column Family: info Row Name: sex Value: boy 43 获取所有数据 44 Row Name: qingqing Timestamp: 1415686141375 column Family: course Row Name: china Value: 100 45 Row Name: qingqing Timestamp: 1415686141381 column Family: course Row Name: english Value: 99 46 Row Name: qingqing Timestamp: 1415686141378 column Family: course Row Name: math Value: 100 47 Row Name: qingqing Timestamp: 1415686141362 column Family: info Row Name: age Value: 18 48 Row Name: qingqing Timestamp: 1415686141365 column Family: info Row Name: sex Value: girl 49 Row Name: tht Timestamp: 1415686141316 column Family: course Row Name: china Value: 97 50 Row Name: tht Timestamp: 1415686141343 column Family: course Row Name: english Value: 85 51 Row Name: tht Timestamp: 1415686141340 column Family: course Row Name: math Value: 128 52 Row Name: tht Timestamp: 1415686141303 column Family: info Row Name: age Value: 20 53 Row Name: tht Timestamp: 1415686141313 column Family: info Row Name: sex Value: boy 54 Row Name: xiaoxue Timestamp: 1415686141353 column Family: course Row Name: china Value: 90 55 Row Name: xiaoxue Timestamp: 1415686141359 column Family: course Row Name: english Value: 90 56 Row Name: xiaoxue Timestamp: 1415686141355 column Family: course Row Name: math Value: 120 57 Row Name: xiaoxue Timestamp: 1415686141347 column Family: info Row Name: age Value: 19 58 Row Name: xiaoxue Timestamp: 1415686141350 column Family: info Row Name: sex Value: boy 59 删除一条数据 60 Row Name: qingqing Timestamp: 1415686141375 column Family: course Row Name: china Value: 100 61 Row Name: qingqing Timestamp: 1415686141381 column Family: course Row Name: english Value: 99 62 Row Name: qingqing Timestamp: 1415686141378 column Family: course Row Name: math Value: 100 63 Row Name: qingqing Timestamp: 1415686141362 column Family: info Row Name: age Value: 18 64 Row Name: qingqing Timestamp: 1415686141365 column Family: info Row Name: sex Value: girl 65 Row Name: xiaoxue Timestamp: 1415686141353 column Family: course Row Name: china Value: 90 66 Row Name: xiaoxue Timestamp: 1415686141359 column Family: course Row Name: english Value: 90 67 Row Name: xiaoxue Timestamp: 1415686141355 column Family: course Row Name: math Value: 120 68 Row Name: xiaoxue Timestamp: 1415686141347 column Family: info Row Name: age Value: 19 69 Row Name: xiaoxue Timestamp: 1415686141350 column Family: info Row Name: sex Value: boy 70 删除多条数据 71 删除数据库 72 2014-11-11 14:09:01,449 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=catalogtracker-on-hconnection-0x21801b 73 2014-11-11 14:09:01,451 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=catalogtracker-on-hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181 74 2014-11-11 14:09:01,452 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error) 75 2014-11-11 14:09:01,452 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session 76 2014-11-11 14:09:01,454 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d60030, negotiated timeout = 90000 77 2014-11-11 14:09:01,459 INFO zookeeper.ZooKeeper (ZooKeeper.java:close(684)) - Session: 0x1499d5df1d60030 closed 78 2014-11-11 14:09:01,459 INFO zookeeper.ClientCnxn (ClientCnxn.java:run(509)) - EventThread shut down 79 2014-11-11 14:09:01,460 INFO client.HBaseAdmin (HBaseAdmin.java:call(908)) - Started disable of users 80 2014-11-11 14:09:01,479 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=catalogtracker-on-hconnection-0x21801b 81 2014-11-11 14:09:01,481 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=catalogtracker-on-hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181 82 2014-11-11 14:09:01,481 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error) 83 2014-11-11 14:09:01,482 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session 84 2014-11-11 14:09:01,486 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d60031, negotiated timeout = 90000 85 2014-11-11 14:09:01,500 INFO zookeeper.ZooKeeper (ZooKeeper.java:close(684)) - Session: 0x1499d5df1d60031 closed 86 2014-11-11 14:09:01,500 INFO zookeeper.ClientCnxn (ClientCnxn.java:run(509)) - EventThread shut down 87 2014-11-11 14:09:01,601 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=catalogtracker-on-hconnection-0x21801b 88 2014-11-11 14:09:01,603 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=catalogtracker-on-hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181 89 2014-11-11 14:09:01,604 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error) 90 2014-11-11 14:09:01,604 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session 91 2014-11-11 14:09:01,606 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d60032, negotiated timeout = 90000 92 2014-11-11 14:09:01,614 INFO zookeeper.ZooKeeper (ZooKeeper.java:close(684)) - Session: 0x1499d5df1d60032 closed 93 2014-11-11 14:09:01,614 INFO zookeeper.ClientCnxn (ClientCnxn.java:run(509)) - EventThread shut down 94 2014-11-11 14:09:01,816 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=catalogtracker-on-hconnection-0x21801b 95 2014-11-11 14:09:01,823 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=catalogtracker-on-hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181 96 2014-11-11 14:09:01,828 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error) 97 2014-11-11 14:09:01,831 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session 98 2014-11-11 14:09:01,837 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d60033, negotiated timeout = 90000 99 2014-11-11 14:09:01,856 INFO zookeeper.ZooKeeper (ZooKeeper.java:close(684)) - Session: 0x1499d5df1d60033 closed100 2014-11-11 14:09:01,856 INFO zookeeper.ClientCnxn (ClientCnxn.java:run(509)) - EventThread shut down101 2014-11-11 14:09:02,157 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=catalogtracker-on-hconnection-0x21801b102 2014-11-11 14:09:02,161 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=catalogtracker-on-hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181103 2014-11-11 14:09:02,163 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error)104 2014-11-11 14:09:02,164 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session105 2014-11-11 14:09:02,168 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d60034, negotiated timeout = 90000106 2014-11-11 14:09:02,185 INFO zookeeper.ZooKeeper (ZooKeeper.java:close(684)) - Session: 0x1499d5df1d60034 closed107 2014-11-11 14:09:02,185 INFO zookeeper.ClientCnxn (ClientCnxn.java:run(509)) - EventThread shut down108 2014-11-11 14:09:02,686 INFO zookeeper.ZooKeeper (ZooKeeper.java:<init>(438)) - Initiating client connection, connectString=slave1:2181 sessionTimeout=90000 watcher=catalogtracker-on-hconnection-0x21801b109 2014-11-11 14:09:02,691 INFO zookeeper.RecoverableZooKeeper (RecoverableZooKeeper.java:<init>(120)) - Process identifier=catalogtracker-on-hconnection-0x21801b connecting to ZooKeeper ensemble=slave1:2181110 2014-11-11 14:09:02,691 INFO zookeeper.ClientCnxn (ClientCnxn.java:logStartConnect(966)) - Opening socket connection to server slave1/192.168.126.135:2181. Will not attempt to authenticate using SASL (unknown error)111 2014-11-11 14:09:02,693 INFO zookeeper.ClientCnxn (ClientCnxn.java:primeConnection(849)) - Socket connection established to slave1/192.168.126.135:2181, initiating session112 2014-11-11 14:09:02,696 INFO zookeeper.ClientCnxn (ClientCnxn.java:onConnected(1207)) - Session establishment complete on server slave1/192.168.126.135:2181, sessionid = 0x1499d5df1d60035, negotiated timeout = 90000113 2014-11-11 14:09:02,721 INFO zookeeper.ZooKeeper (ZooKeeper.java:close(684)) - Session: 0x1499d5df1d60035 closed114 2014-11-11 14:09:02,722 INFO zookeeper.ClientCnxn (ClientCnxn.java:run(509)) - EventThread shut down115 2014-11-11 14:09:02,723 INFO client.HBaseAdmin (HBaseAdmin.java:disableTable(963)) - Disabled users116 2014-11-11 14:09:02,874 INFO client.HBaseAdmin (HBaseAdmin.java:deleteTable(695)) - Deleted users117 删除表成功
没报什么错误，只有一个没有找到hadoop本地库的警告
关于新建表时的新API操作TableName.valueOf(tablename);我看了一下TableName的源码
1 /** 2 * @throws IllegalArgumentException if fullName equals old root or old meta. Some code 3 * depends on this. 4 */ 5 public static TableName valueOf(String name) { 6 for (TableName tn : tableCache) { 7 if (name.equals(tn.getNameAsString())) { 8 return tn; 9 }10 }11 12 int namespaceDelimIndex = name.indexOf(NAMESPACE_DELIM);13 byte[] nameB = Bytes.toBytes(name);14 15 if (namespaceDelimIndex < 0) {16 return createTableNameIfNecessary(17 ByteBuffer.wrap(NamespaceDescriptor.DEFAULT_NAMESPACE_NAME),18 ByteBuffer.wrap(nameB));19 } else {20 return createTableNameIfNecessary(21 ByteBuffer.wrap(nameB, 0, namespaceDelimIndex),22 ByteBuffer.wrap(nameB, namespaceDelimIndex + 1,23 nameB.length - (namespaceDelimIndex + 1)));24 }25 }
valueOf是它的一个静态方法。注释我看不太懂，看代码可以看出多了两个判断，一个判断它是否已经在表缓存中了，一个是判断它的前缀问题，如果有就去掉。我不知道第二个具体有什么作用。
HBase-java api 基本操作
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