Simple Java Operations for HBase

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Table for Java simple Operation HBase

1 Importorg.apache.hadoop.conf.Configuration;2 ImportOrg.apache.hadoop.hbase.*;3 Importorg.apache.hadoop.hbase.client.*;4 ImportOrg.apache.hadoop.hbase.filter.CompareFilter;5 Importorg.apache.hadoop.hbase.filter.FilterList;6 ImportOrg.apache.hadoop.hbase.filter.SingleColumnValueFilter;7 ImportOrg.junit.Before;8 Importorg.junit.Test;9 Ten Importjava.io.IOException; One Importjava.util.ArrayList; A ImportJava.util.Iterator; - ImportJava.util.Random; -  the /** - * Created by Edward on 2016/6/19. -  */ -  Public classTesthbase { +  -      Public StaticConfiguration conf =NULL; +      Public StaticTableName table = tablename.valueof ("Phone"); A      Public StaticRandom random =NewRandom (); at  - @Before -      Public voidSetup () -     { -         //access HBase through the zookeeper cluster -conf =hbaseconfiguration.create (); inConf.set ("Hbase.zookeeper.quorum", "Node1,node2,node3"); -SYSTEM.OUT.PRINTLN ("Setup"); to     } +  - @Test the      Public voidCreateTable ()throwsIOException { *Hbaseadmin hbaseadmin =Newhbaseadmin (conf); $        if(hbaseadmin.tableexists (table)) {Panax Notoginseng hbaseadmin.disabletable (table); - hbaseadmin.deletetable (table); the         } +         //Table AHtabledescriptor Htabledescriptor =Newhtabledescriptor (table); the         //Column Family Cf1 +Hcolumndescriptor Hcolumndescriptor =NewHcolumndescriptor ("CF1"); -Hcolumndescriptor.setblockcacheenabled (true); $Hcolumndescriptor.setblocksize (128000); $Hcolumndescriptor.setmaxversions (10); -         //table Add column family - htabledescriptor.addfamily (hcolumndescriptor); the hbaseadmin.createtable (htabledescriptor); -     }Wuyi  the  - @Test Wu     /** - * Insert Data About      */ $      Public voidInsert ()throwsIOException { -  -         //Create a Htable object -Htable htable =NewHtable (Conf, This. table); Aarraylist<put> list =NewArraylist<put>(); +  the          for(inti = 0; i<1000; i++) -         { $             //Row_key thePut put =NewPut (string.valueof (i). GetBytes ()); the             //Column,value thePut.add ("Cf1". GetBytes (), "name". GetBytes (), "LS". GetBytes ()); thePut.add ("Cf1". GetBytes (), "Age". GetBytes (), string.valueof (i%100). GetBytes ()); -             //Put each Put object in the list in List.add (put); the         } the         //Put the information in the table About htable.put (list); the     } the  the  + @Test -     /** the * EnquiryBayi      */ the      Public voidSearch ()throwsIOException the     { -  -Htable htable =NewHtable (Conf, This. table); the         //Create a Row_key corresponding Get object theGet get =NewGet ("123". GetBytes ()); the         //Get Get Results theResult result =Htable.get (get); -         //get column Latest cell theCell Columnlatestcell = Result.getcolumnlatestcell ("Cf1". GetBytes (), "name". GetBytes ()); the         //get a value using Cellutil the         byte[] bytes =Cellutil.clonevalue (Columnlatestcell);94System.out.println (NewString (bytes)); the     } the  the 98 @Test About     /** - * Data acquisition via scan method101      * **/102      Public voidSearch1 ()throwsIOException103     {104Htable htable =NewHtable (Conf, This. table); the         //Set Scan Range106Scan Scan =NewScan ("GetBytes"), "450". GetBytes ());107         //get result scanner by scan108Resultscanner scanner =Htable.getscanner (scan);109         //using iterators theIterator<result> Iterator =scanner.iterator ();111  the          while(Iterator.hasnext ())113         { theResult result=Iterator.next (); theCell Columnlatestcell = Result.getcolumnlatestcell ("Cf1". GetBytes (), "age". GetBytes ()); the             //get the values for columns in a column family117             byte[] bytes =Cellutil.clonevalue (Columnlatestcell);118             //Get Row_key119             byte[] Bytes1 =Cellutil.clonerow (Columnlatestcell); -System.out.println (NewString (bytes) + "" +NewString (bytes1));121         }122     }123}

Simple Java Operations for HBase