连接hdfs

package Main;

import java.io.IOException;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.HBaseConfiguration;
import org.apache.hadoop.hbase.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Table;

public class main {

    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;
    public static void main(String[] args) {
        // TODO Auto-generated method stub
        configuration  = HBaseConfiguration.create();
        configuration.set("hbase.rootdir","hdfs://127.0.0.1:8020/hbase");
        try{
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        }catch (IOException e){
            e.printStackTrace();
        }
        try {
            insertRow("student","scofield","score","English","45");
            insertRow("student","scofield","score","Math","89");
            insertRow("student","scofield","score","Computer","100");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        close();
    }
    public static void insertRow(String tableName,String rowKey,String colFamily,
                                 String col,String val) throws IOException {
        Table table = connection.getTable(TableName.valueOf(tableName));
        Put put = new Put(rowKey.getBytes());
 put.addColumn(colFamily.getBytes(), col.getBytes(), val.getBytes());
        table.put(put);
        table.close();
    }
    public static void close(){
        try{
            if(admin != null){
                admin.close();
            }
            if(null != connection){
                connection.close();
            }
        }catch (IOException e){
            e.printStackTrace();
        }
    }
}

package Main;

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.TableName;
import org.apache.hadoop.hbase.client.Admin;
import org.apache.hadoop.hbase.client.Connection;
import org.apache.hadoop.hbase.client.ConnectionFactory;
import org.apache.hadoop.hbase.client.Get;
import org.apache.hadoop.hbase.client.Put;
import org.apache.hadoop.hbase.client.Result;
import org.apache.hadoop.hbase.client.Table;

public class main {

    public static Configuration configuration;
    public static Connection connection;
    public static Admin admin;

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        configuration = HBaseConfiguration.create();

        configuration.set("hbase.rootdir", "hdfs://127.0.0.1:8020/hbase");

        try {
            connection = ConnectionFactory.createConnection(configuration);
            admin = connection.getAdmin();
        } catch (IOException e) {
            e.printStackTrace();
        }
        try {
            getData("student", "scofield", "score", "English");
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        close();
    }

    public static void getData(String tableName, String rowKey, String colFamily,
                               String col) throws IOException {
        Table table = connection.getTable(TableName.valueOf(tableName));
        Get get = new Get(rowKey.getBytes());
        get.addColumn(colFamily.getBytes(), col.getBytes());
        Result result = table.get(get);
        showCell(result);
        table.close();
    }

    public static void showCell(Result result) {
        Cell[] cells = result.rawCells();
        for (Cell cell : cells) {
            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)) + " ");
        }
    }

    public static void close() {
        try {
            if (admin != null) {
                admin.close();
            }
            if (null != connection) {
                connection.close();
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}