hbase增删改查

package com.imooc.hbase;

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.*;
import org.apache.hadoop.hbase.util.Bytes;

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;

public class HBaseOp {
    
    
    public HBaseOp() {
    
    
    }

    public static void main(String[] args)  throws Exception{
    
    
        //获取配置
        Configuration conf= HBaseConfiguration.create();
        //指定HBase使用zk的地址，多个用逗号隔开
        conf.set("hbase.zookeeper.quorum","bigdata01:2181,bigdata02:2181,bigdata03:2181");
        // 指定HBase在hdfs上的根目录
        conf.set("hbase.rootdir","hdfs://bigdata01:9000/hbase");
        // 创建HBase连接，负责HBase中数据的一些增删改查DML操作
        Connection conn= ConnectionFactory.createConnection(conf);
//       添加数据
//        put(conn);
        //查询数据
//        get(conn);
        // 查询多版本的数据 conn getMoreVersion

//        getMoreVersion(conn);
//        删除数据
//        delete(conn);
//        获取管理权限，负责对HBase中的表进行操作DDL
        Admin admin= conn.getAdmin();
        admin.close();
        conn.close();
// 创建表
//        createTable(admin);
//        删除表，先禁用表
//        deleteTable(admin);

    }

    private static void deleteTable(Admin admin) throws IOException {
    
    
        admin.disableTable(TableName.valueOf("test"));
        admin.deleteTable(TableName.valueOf("test"));
    }

    private static void createTable(Admin admin) throws IOException {
    
    
        ColumnFamilyDescriptor familyDesc1=ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("info"))
                .setMaxVersions(3).build();
        ColumnFamilyDescriptor familyDesc2=ColumnFamilyDescriptorBuilder.newBuilder(Bytes.toBytes("level"))
                .setMaxVersions(2).build();
        ArrayList<ColumnFamilyDescriptor> familyList= new ArrayList<ColumnFamilyDescriptor>();
        familyList.add(familyDesc1);
        familyList.add(familyDesc2);
        // 获取TableDescriptor对象
        TableDescriptor desc=TableDescriptorBuilder.newBuilder(TableName.valueOf("test"))
                .setColumnFamilies(familyList).build();
        admin.createTable(desc);
    }

    private static void delete(Connection conn) throws IOException {
    
    
        Table table= conn.getTable(TableName.valueOf("student"));
        Delete delete=new Delete(Bytes.toBytes("laowang"));
        table.delete(delete);
        table.close();
    }

    private static void getMoreVersion(Connection conn) throws IOException {
    
    
        Table table= conn.getTable(TableName.valueOf("student"));
        Get get =new Get(Bytes.toBytes("laowang"));
        get.readAllVersions();
        Result result=table.get(get);
        List<Cell> columnCells=result.getColumnCells(Bytes.toBytes("info"),Bytes.toBytes("age"));
        for (Cell cell:columnCells){
    
    
            byte[] value_bytes=CellUtil.cloneValue(cell);
            long timestamp=cell.getTimestamp();
            System.out.println("值为："+new String(value_bytes)+",时间戳："+timestamp);

        }
        table.close();
    }

    private static void get(Connection conn) throws IOException {
    
    
        Table table= conn.getTable(TableName.valueOf("student"));
        Get get =new Get(Bytes.toBytes("laowang"));
        Result result=table.get(get);
        List<Cell> cells=result.listCells();
        for (Cell cell:cells){
    
    
            byte[] famaily_bytes= CellUtil.cloneFamily(cell);
            byte[] column_bytes=CellUtil.cloneQualifier(cell);
            byte[] value_bytes=CellUtil.cloneValue(cell);
            System.out.println("列族："+new String(famaily_bytes)+",列："+new String(column_bytes)+",值："+new String(value_bytes));

        }
        System.out.println("========================================================");

        byte[] age_bytes= result.getValue(Bytes.toBytes("info"),Bytes.toBytes("age"));
        System.out.println("age列的值"+new String(age_bytes));
        table.close();
    }

    private static void put(Connection conn) throws IOException {
    
    
        Table table= conn.getTable(TableName.valueOf("student"));
        Put put=new Put(Bytes.toBytes("laowang"));
        put.addColumn(Bytes.toBytes("info"),Bytes.toBytes("age"),Bytes.toBytes("18"));
        put.addColumn(Bytes.toBytes("info"),Bytes.toBytes("sex"),Bytes.toBytes("man"));
        put.addColumn(Bytes.toBytes("info"),Bytes.toBytes("class"),Bytes.toBytes("A"));
        table.put(put);
        table.close();
    }


}