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
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);
- }
- 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();
- }
- }
- 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();
- }
- }
- 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();
- }
- }
- 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();
- }
- }
- public static void getData(Configuration configuration,String tableName){
- HTable table;
- try {
- table = new HTable(configuration, tableName);
- Get get=new Get(Bytes.toBytes("zhangsan"));
- Result result=table.get(get);
- for(Cell cell:result.rawCells()){
- System.out.println("RowName:"+new String(CellUtil.cloneRow(cell))+" ");
- System.out.println("Timetamp:"+cell.getTimestamp()+" ");
- System.out.println("column Family:"+new String(CellUtil.cloneFamily(cell))+" ");
- System.out.println("row Name:"+new String(CellUtil.cloneQualifier(cell))+" ");
- System.out.println("value:"+new String(CellUtil.cloneValue(cell))+" ");
- }
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- public static void getAllData(Configuration configuration,String tableName){
- HTable table;
- try {
- table=new HTable(configuration, tableName);
- Scan scan=new Scan();
- ResultScanner results=table.getScanner(scan);
- for(Result result:results){
- for(Cell cell:result.rawCells()){
- System.out.println("RowName:"+new String(CellUtil.cloneRow(cell))+" ");
- System.out.println("Timetamp:"+cell.getTimestamp()+" ");
- System.out.println("column Family:"+new String(CellUtil.cloneFamily(cell))+" ");
- System.out.println("row Name:"+new String(CellUtil.cloneQualifier(cell))+" ");
- System.out.println("value:"+new String(CellUtil.cloneValue(cell))+" ");
- }
- }
- } catch (IOException e) {
- // TODO Auto-generated catch block
- e.printStackTrace();
- }
- }
- }
http://blog.sina.com.cn/s/blog_68674da70102vaaw.html