在集群中Java 通过调用API操作HBase

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);
}
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

在集群中Java 通过调用API操作HBase

猜你喜欢