hbase--知识点总结2

--用java操作hbase  

  1、配置jar包环境  

       创建hbase项目 --> 新建folder文件夹 --> 将hbase相关jar包全部导入到java项目之中 --> add buildpath -->导入hbase conf文件夹下面的配置文件 （配置hbase环境时修改过的所有配置文件）-->

      将配置文件放到hbase的src目录下面 （目的：让java找到hbase)-->导入hadoop相关jar包

 2、查看hbase方法api的方法：在hbase源码安装包中的docs文件夹下apidocs

  3、hbase基本操作源码

package com.wcg.Hbase;

import java.io.IOException;
import java.io.InterruptedIOException;
import java.text.ParseException;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.Random;

import org.apache.hadoop.classification.InterfaceAudience.Private;
import org.apache.hadoop.classification.InterfaceAudience.Public;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.hbase.Cell;
import org.apache.hadoop.hbase.CellUtil;
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.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.RetriesExhaustedWithDetailsException;
import org.apache.hadoop.hbase.client.Scan;
import org.apache.hadoop.hbase.filter.CompareFilter.CompareOp;
import org.apache.hadoop.hbase.filter.FilterList;
import org.apache.hadoop.hbase.filter.PrefixFilter;
import org.apache.hadoop.hbase.filter.SingleColumnValueFilter;
import org.apache.hadoop.hbase.generated.master.table_jsp;
import org.apache.hadoop.hbase.thrift.generated.Hbase.Processor.get;
import org.apache.hadoop.hbase.thrift2.generated.TMutation;
import org.apache.hadoop.hbase.util.Bytes;
import org.apache.hadoop.hdfs.protocol.proto.ClientNamenodeProtocolProtos.GetDataEncryptionKeyRequestProto;
import org.apache.hadoop.io.Stringifier;
import org.junit.After;
import org.junit.Before;
import org.junit.Test;
import org.mockito.exceptions.verification.NeverWantedButInvoked;

import com.google.common.collect.Table;
import com.wcg.Hbase.Phone.PhoneDetail;
import com.wcg.Hbase.Phone.dayPhoneDetail;

public class HbaseDemo {
    
    
    Configuration conf = null;
    HBaseAdmin admin = null;
    private String TM = "phone";
    HTable table = null;
    
    
    @Before
    public void init() throws MasterNotRunningException, ZooKeeperConnectionException, IOException{
        //首先进行初始化
        conf = new Configuration();
        //连接zookeeper
        conf.set("hbase.zookeeper.quorum", "node1,node2,node3");
        admin = new HBaseAdmin(conf);
        table = new HTable(conf, TM);
    
    } 

    @Test
    public void createTable() throws IOException{
        //在创建表之前先进行判断该表是否已经存在  
        if(admin.tableExists(TM)){
            admin.disableTable(TM);
            admin.deleteTable(TM);
            
        }
        
        //创建一个表描述的类  
        HTableDescriptor desc = new HTableDescriptor(TableName.valueOf(TM));
        HColumnDescriptor family = new HColumnDescriptor("cf".getBytes());
        desc.addFamily(family);
        admin.createTable(desc);
        
    }
    
    //向表中插入数据  
    @Test
    public void insertDB() throws RetriesExhaustedWithDetailsException, InterruptedIOException{
     String rowkey = "111111";    
        
      Put put = new Put(rowkey.getBytes());        
      
      put.add("cf".getBytes(), "name".getBytes(), "zhangsan".getBytes());
      
      table.put(put);
    
    }

    /**
     * 模拟手机通话记录
     * 一共有10个用户，每个用户产生了1000条数据
     * @throws ParseException 
     * @throws InterruptedIOException 
     * @throws RetriesExhaustedWithDetailsException 
     * @throws IOException
     */
    @Test
    public void insertDB2() throws ParseException, RetriesExhaustedWithDetailsException, InterruptedIOException{
        List<Put> list = new ArrayList<Put>();
        for(int i=0;i<5;i++){
            String phoneNum = getPhone("158"); 
            for(int j= 0; j<1000;j++){
                //产生一些其他类型的数据
                String dnum = getPhone("182");
                String length = r.nextInt(99)+"";
                String type = r.nextInt(2)+"";
                String date = getDate("2019");
                //随机产生一个rowkey 
                String rowkey = phoneNum+"_"+(Long.MAX_VALUE-sdf.parse(date).getTime());
                Put put = new Put(rowkey.getBytes());
                put.add("cf".getBytes(), "dnum".getBytes(), dnum.getBytes());
                put.add("cf".getBytes(), "length".getBytes(), length.getBytes());
                put.add("cf".getBytes(), "type".getBytes(), type.getBytes());
                put.add("cf".getBytes(), "date".getBytes(), date.getBytes());
                list.add(put);
                
            }    
        }
        table.put(list);
    }
    /*
     * 使用protobuf进行数据插入  
     * 
     */
    @Test
    public void insertDB3() throws ParseException, RetriesExhaustedWithDetailsException, InterruptedIOException{
        List<Put> list = new ArrayList<Put>();
        for(int i=0;i<5;i++){
            String phoneNum = getPhone("158"); 
            for(int j= 0; j<1000;j++){
                //产生一些其他类型的数据
                String dnum = getPhone("182");
                String length = r.nextInt(99)+"";
                String type = r.nextInt(2)+"";
                String date = getDate("2019");
                //随机产生一个rowkey 
                String rowkey = phoneNum+"_"+(Long.MAX_VALUE-sdf.parse(date).getTime());
                Phone.PhoneDetail.Builder phoneDetail = Phone.PhoneDetail.newBuilder();
                phoneDetail.setDate(date);
                phoneDetail.setDnum(dnum);
                phoneDetail.setLength(length);
                phoneDetail.setType(type);
                Put put = new Put(rowkey.getBytes());
                put.add("cf".getBytes(), "phoneDetail".getBytes(), phoneDetail.build().toByteArray());
                //注：不能写成phoneDetail.toString().getBytes(),这样会将只想对象的地址转化为字节数组  
                
                list.add(put);
                
            }    
        }
        table.put(list);
    }
    /*
     * 以用户作为rowkey进行数据压缩
     * 
     * 
     */
    @Test
    public void insertDB4() throws ParseException, RetriesExhaustedWithDetailsException, InterruptedIOException{
        List<Put> puts = new ArrayList<Put>();
        for(int i =0;i<10;i++){
            String phoneNum = getPhone("158");
            String rowkey = phoneNum+"_"+(Long.MAX_VALUE-sdf.parse("20190101000000").getTime());
            Phone.dayPhoneDetail.Builder dayPhone = Phone.dayPhoneDetail.newBuilder();
            for (int j = 0 ;j<1000;j++){
                //产生一些其他类型的数据
                String dnum = getPhone("182");
                String length = r.nextInt(99)+"";
                String type = r.nextInt(2)+"";
                String date = getDate2("20190101");
                //随机产生一个rowkey 
                Phone.PhoneDetail.Builder phoneDetail = Phone.PhoneDetail.newBuilder();
                phoneDetail.setDate(date);
                phoneDetail.setDnum(dnum);
                phoneDetail.setLength(length);
                phoneDetail.setType(type);
                dayPhone.addDayofPhone(phoneDetail);                    
            }
            Put put = new Put(rowkey.getBytes());
            put.add("cf".getBytes(), "day".getBytes(),dayPhone.build().toByteArray());
            puts.add(put);
        }
        table.put(puts);    
    }
    
    
    
    
    private String getDate2(String string) {
        return string+String.format("%02d%02d%02d",r.nextInt(24),r.nextInt(60),r.nextInt(60));
    }

    /*
     * 通过get方法获取一条用protobuf存储的数据  
     * 
     */
    @Test
    public void get2() throws IOException{
        Get get = new Get("15865543021_9223370490642209807".getBytes());
        Result re = table.get(get);
        Cell cell = re.getColumnLatestCell("cf".getBytes(), "phoneDetail".getBytes());
        //将获取到的Cell字节数组转化为一个对象 
        Phone.PhoneDetail phoneDetail1 =  Phone.PhoneDetail.parseFrom(CellUtil.cloneValue(cell));
        System.out.println(phoneDetail1);
        
    }
    
    /*
     * 用get方法获取之前插入的数据
     * 
     * 
     */
    @Test
    public void get3() throws IOException{
        int count = 0;
        Get get = new Get("15897845910_9223370490582775807".getBytes());
        Result re = table.get(get);
        Cell cell = re.getColumnLatestCell("cf".getBytes(), "day".getBytes());
        //将获取到的Cell字节数组转化为一个对象 
        Phone.dayPhoneDetail dayPhone = Phone.dayPhoneDetail.parseFrom(CellUtil.cloneValue(cell));
        for(PhoneDetail pd: dayPhone.getDayofPhoneList()){
            
            System.out.println(pd);
            count++;
        }
        
        System.out.println(count);
    }
    
    
    /*
     * 查询某一个用户2月份的所有通话记录
     * 
     */
    @Test 
    public void scan2() throws ParseException, IOException{
        String phoneNum = "15890601889";
        String startRow = phoneNum+"_"+(Long.MAX_VALUE-sdf.parse("20190301000000").getTime());
        String stopRow = phoneNum+"_"+(Long.MAX_VALUE-sdf.parse("20190201000000").getTime());
        Scan scan= new Scan();
        scan.setStartRow(startRow.getBytes());
        scan.setStopRow(stopRow.getBytes());
        //从table对象中获取scan对象
        ResultScanner rss = table.getScanner(scan);
        for(Result rs : rss){
          System.out.println(new String(CellUtil.cloneValue((rs.getColumnLatestCell("cf".getBytes(), "dnum".getBytes())))));            
          System.out.println(new String(CellUtil.cloneValue((rs.getColumnLatestCell("cf".getBytes(), "length".getBytes())))));            
          System.out.println(new String(CellUtil.cloneValue((rs.getColumnLatestCell("cf".getBytes(), "type".getBytes())))));            
          System.out.println(new String(CellUtil.cloneValue((rs.getColumnLatestCell("cf".getBytes(), "date".getBytes())))));                
        }
        
    }
    
    /*
     * 查询主叫用户的数据
     * 用过滤器对主叫用户的数据进行过滤
     * 
     */
    @Test
    public void filter() throws IOException{
        String phoneNum = "15890601889";
        FilterList lists = new FilterList();
        SingleColumnValueFilter filter1 = new SingleColumnValueFilter("cf".getBytes(), "type".getBytes(), CompareOp.EQUAL, "1".getBytes());
        PrefixFilter filter2 = new PrefixFilter(phoneNum.getBytes());
        lists.addFilter(filter1);
        lists.addFilter(filter2);
        Scan scan = new Scan();
        scan.setFilter(lists);
        ResultScanner rss = table.getScanner(scan);
        for(Result rs : rss){
          System.out.println(new String(CellUtil.cloneValue((rs.getColumnLatestCell("cf".getBytes(), "dnum".getBytes())))));            
          System.out.println(new String(CellUtil.cloneValue((rs.getColumnLatestCell("cf".getBytes(), "length".getBytes())))));            
          System.out.println(new String(CellUtil.cloneValue((rs.getColumnLatestCell("cf".getBytes(), "type".getBytes())))));            
          System.out.println(new String(CellUtil.cloneValue((rs.getColumnLatestCell("cf".getBytes(), "date".getBytes())))));                
        }
        
    }
    
    
    
    
    private String getDate(String string) {
        
        return string+string.format("%02d%02d%02d%02d%02d", r.nextInt(12)+1,r.nextInt(31),r.nextInt(24),r.nextInt(60),r.nextInt(60));
    }


    Random r = new Random(); 
    SimpleDateFormat sdf = new SimpleDateFormat("yyyyMMddHHmmss");
    private String getPhone(String string){
        //产生一个8位的随机整数，当数据不足8位的时候，在前面用0补齐
        return string+String.format("%08d", r.nextInt(99999999));
        
    }
    
    
    
    //用get的方式获取数据 
    @Test 
    public void get() throws IOException{
        String rowkey = "111111";
        
        Get get = new Get(rowkey.getBytes());
        Result rs = table.get(get);
          //Bytes.toString((rs.getValue("cf".getBytes(), "name".getBytes())));
        System.out.println("+++++++++++++++数据开始得到+++++++++++++++");
        Cell cell = rs.getColumnLatestCell("cf".getBytes(), "name".getBytes());
        //System.out.println(org.apache.hadoop.hbase.util.Bytes.toString(cell.getValue()));
        String mm = Bytes.toString(CellUtil.cloneValue(cell));
        System.out.println(mm);
        System.out.println("++++++++++++++++数据已经得到+++++++++++++++++++++");
        
    }
    
    
    
    @After
    public void destroy() throws IOException{
        if(admin!=null){
            admin.close();
        }
        
        if(table!=null){
            table.close();
            
        }
    }
    
}
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原文地址：https://www.cnblogs.com/wcgstudy/p/10508450.html