在集群中Java 通过调用API操作HBase 0.98

在集群中Java 通过调用API操作HBase 0.98

本文的内容是在集群中创建java项目调用api来操作hbase,主要涉及对hbase的创建表格,删除表格,插入数据,删除数据,查询一条数据,查询所有数据等操作。

具体流程如下:
1.创建项目
2.获取jar包到项目的lib目录下(这边试用的事hbase 0.98 lib目录下的所有jar包)
3.编写java程序
4.编写ant脚本

package com.wan.hbase;

import java.io.IOException;

import org.apache.Hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.HColumnDescriptor;
import org.apache.hadoop.hbase.HTableDescriptor;
import org.apache.hadoop.hbase.MasterNotRunningException;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.ZooKeeperConnectionException;
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.util.Bytes;

public class SimpleHBase {

public static void main(String[] args) {
  Configuration configuration=HBaseConfiguration.create();
  String tableName="student";
  createTable(configuration, tableName);
//  addData(configuration, tableName);
//  getData(configuration, tableName);
//  getAllData(configuration, tableName);
//  deleteDate(configuration, tableName);
//  dropTable(configuration, tableName);
 
 }
 
 /**
  * create a new Table
  * @param configuration Configuration
  * @param tableName String,the new Table's name
  * */
 public static void createTable(Configuration configuration,String tableName){
  HBaseAdmin admin;
  try {
   admin = new HBaseAdmin(configuration);
   if(admin.tableExists(tableName)){
    admin.disableTable(tableName);
    admin.deleteTable(tableName);
    System.out.println(tableName+"is exist ,delete ......");
   }
   
   
   HTableDescriptor tableDescriptor=new HTableDescriptor(TableName.valueOf(tableName));
   tableDescriptor.addFamily(new HColumnDescriptor("info"));
   tableDescriptor.addFamily(new HColumnDescriptor("address"));
   admin.createTable(tableDescriptor);
   System.out.println("end create table");
  } catch (MasterNotRunningException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (ZooKeeperConnectionException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 
 }
 
 /**
  * Delete the existing table
  * @param configuration Configuration
  * @param tableName String,Table's name
  * */
 public static void dropTable(Configuration configuration,String tableName){
  HBaseAdmin admin;
  try {
   admin = new HBaseAdmin(configuration);
   if(admin.tableExists(tableName)){
    admin.disableTable(tableName);
    admin.deleteTable(tableName);
    System.out.println(tableName+"delete success!");
   }else{
    System.out.println(tableName+"Table does not exist!");
   }
  } catch (MasterNotRunningException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (ZooKeeperConnectionException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
 
 /**
  * insert a data
  * @param configuration Configuration
  * @param tableName String,Table's name
  * */
 public static void addData(Configuration configuration,String tableName){
  HBaseAdmin admin;
  try {
   admin = new HBaseAdmin(configuration);
   if(admin.tableExists(tableName)){
    HTable table=new HTable(configuration, tableName);
    Put put=new Put(Bytes.toBytes("zhangsan"));
    put.add(Bytes.toBytes("info"), Bytes.toBytes("age"), Bytes.toBytes("28"));
    table.put(put);
    System.out.println("add success!");
   }else{
    System.out.println(tableName+"Table does not exist!");
   }
  } catch (MasterNotRunningException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (ZooKeeperConnectionException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
 
 /**
  * Delete a data
  * @param configuration Configuration
  * @param tableName String,Table's name
  * */
 public static void deleteDate(Configuration configuration,String tableName){
  HBaseAdmin admin;
  try {
   admin=new HBaseAdmin(configuration);
   if(admin.tableExists(tableName)){
    HTable table=new HTable(configuration, tableName);
    Delete delete=new Delete(Bytes.toBytes("zhangsan"));
    table.delete(delete);
    System.out.println("delete success!");
   }else{
    System.out.println("Table does not exist!");
   }
  } catch (MasterNotRunningException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (ZooKeeperConnectionException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
 }
 

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