大数据基础---rowkey的设计及rowkey如何匹配分配到各个分区上？

刚开始，新创建的表预分区：如图所示

然后插入数据

import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.conf.Configuration;
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.util.Bytes;

public class InsertDateToTable {
public static void main(String[] args) {
    String tableName = "lzpTest";
    
    Configuration conf = new Configuration();
    conf.set("hbase.zookeeper.quorum","改成zookeeper节点");
    
    HTable hTable=null;
    HBaseAdmin admin = null;
    try {
        admin = new HBaseAdmin(conf);
        
        hTable = new HTable(conf, tableName);
    
        //插入一条数据到hbase表中
        Put put = new Put(Bytes.toBytes(10+System.currentTimeMillis()+"-"+111));
        put.add("cf1".getBytes(), "name".getBytes(), "lzp".getBytes());
        hTable.put(put);
        //批插入数据到hbase表中
 //            hTable.put(batchPut(10000));
        System.out.println("插入成功！");
    } catch (IOException e) {
        e.printStackTrace();
        System.out.println("插入失败！");
    } finally {
        if(hTable!=null) {
            try {
                hTable.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
        if(admin!=null) {
            try {
                admin.close();
            } catch (IOException e) {
                e.printStackTrace();
            }
        }
    }
}
/**
 * 产生随机数用于拼接Rowkey前缀
 * @return
 */
public static String getRandomNumber() {
    String ranStr = Math.random()+"";
    int index = ranStr.indexOf(".");
    return ranStr.substring(index+1, index+3);
}

/**
 * 批插入数据
 * @param num
 * @return
 */
public static List<Put> batchPut(int num) {
    System.out.println("开始插入数据。。。。");
    List<Put> list = new ArrayList<>();
    System.out.println("插入:"+num+" 数据！");
    for(int i =0;i<num;i++) {
        //Rowkey组成：随机数+"-"+当前系统时间+"-"+i
        byte[] rowkey = Bytes.toBytes(getRandomNumber()+"-"+System.currentTimeMillis()+"-"+i);
        Put put = new Put(rowkey);
        put.add(Bytes.toBytes("cf1"), Bytes.toBytes("name"), Bytes.toBytes("lzp"+i));
        list.add(put);
    }
    return list;
}
}