java实现hbase表创建、数据插入、删除表

近日查看了相关资料后，梳理了一下用java实现hbase的表创建、数据插入、删除表，代码如下：

1、需要的jar包：

commons-codec-1.4.jar

commons-logging-1.0.4.jar

hadoop-0.20.2-core.jar

hbase-0.20.6.jar

log4j-1.2.15.jar

zookeeper-3.2.2.jar

 

2、代码：

package org.myhbase; import java.io.IOException; 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.HBaseAdmin; import org.apache.hadoop.hbase.client.HTable; 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.io.BatchUpdate; public class HBaseBasic02 { static HBaseConfiguration hbaseConfig=null; static{ Configuration config=new Configuration(); config.set("hbase.zookeeper.quorum","192.168.10.149,192.168.10.44,192.168.10.49"); config.set("hbase.zookeeper.property.clientPort", "2181"); hbaseConfig=new HBaseConfiguration(config); } /** * 创建一张表 * @throws IOException */ public static void createTable(String tablename) throws IOException{ HBaseAdmin admin = new HBaseAdmin(hbaseConfig); if(admin.tableExists(tablename)){ System.out.println("table Exists!!!"); }else{ HTableDescriptor tableDesc = new HTableDescriptor(tablename); tableDesc.addFamily(new HColumnDescriptor("name:")); admin.createTable(tableDesc); System.out.println("create table ok."); } } /** * 删除一张表 * @throws IOException */ public static void dropTable(String tablename) throws IOException{ HBaseAdmin admin = new HBaseAdmin(hbaseConfig); admin.disableTable(tablename); admin.deleteTable(tablename); System.out.println("drop table ok."); } /** * 添加一条数据 * @throws IOException */ public static void addData(String tablename) throws IOException{ HTable table=new HTable(hbaseConfig,tablename); BatchUpdate update=new BatchUpdate("Huangyi"); update.put("name:java","http://www.sun.com".getBytes()); table.commit(update); System.out.println("add data ok."); } /** * 显示所有数据 * @throws IOException */ public static void getAllData(String tablename) throws IOException{ HTable table=new HTable(hbaseConfig,tablename); Scan s=new Scan(); ResultScanner rs=table.getScanner(s); for(Result r:rs){ for(KeyValue kv:r.raw()){ System.out.println("rowkey : "+new String(kv.getRow())); System.out.println(new String(kv.getColumn())+" = "+new String(kv.getValue())); } } } public static void main(String [] args) throws IOException{ String tablename="table_1"; HBaseBasic02.createTable(tablename); HBaseBasic02.addData(tablename); HBaseBasic02.getAllData(tablename); HBaseBasic02.dropTable(tablename); } }