5月12日

实验4

NoSQL和关系数据库的操作比较

 

1.实验目的

1)理解四种数据库(MySQL、HBase、Redis和MongoDB)的概念以及不同点

2)熟练使用四种数据库操作常用的Shell命令;

3)熟悉四种数据库操作常用的Java API

2.实验平台

1操作系统:Linux(建议Ubuntu16.04Ubuntu18.04);

2Hadoop版本:3.1.3

3MySQL版本:5.6;

4HBase版本:2.2.2

5Redis版本5.0.5

6MongoDB版本4.0.16

7JDK版本:1.8

8Java IDEEclipse;

3.实验步骤

(一) MySQL数据库操作

学生表如14-7所示。

14-7 学生表Student

Name

English

Math

Computer

zhangsan

69

86

77

lisi

55

100

88

  1. 根据上面给出的Student,在MySQL数据库中完成如下操作:

1)在MySQL中创建Student表,并录入数据;

2SQL语句输出Student表中的所有记录;

3查询zhangsanComputer成绩

4修改lisiMath成绩改为95。

        

2.根据上面已经设计出的Student,使用MySQLJAVA客户端编程实现以下操作:

1)向Student表中添加如下所示的一条记录:

scofield

45

89

100

 

2获取scofieldEnglish成绩信息

 

(二)HBase数据库操作

学生表Student如表14-8所示。

14-8 学生表Student

     name

score

English

Math

Computer

zhangsan

69

86

77

lisi

55

100

88

  1. 根据上面给出的学生表Student的信息执行如下操作:

(1)Hbase Shell命令创建学生Student

 

 

(2)用scan命令浏览Student表的相关信息

 

(3)查询zhangsan的Computer成绩

 

(4)修改lisi的Math成绩,95。

 

 

2.根据上面已经设计出的Student表用HBase API编程实现以下操作:

1)添加数据:English:45  Math:89 Computer:100

scofield

45

89

100

 

package com.xusheng.nosql.hbase;

 

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 hbase_insert {

 

    /**

     * @param xusheng

     */

    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://localhost:9000/hbase");

        //configuration.set("hbase.rootdir","hdfs://node1:8020/HBase");

        configuration.set("hbase.zookeeper.quorum","node1,node2,node3");

 

        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();

        }

    }

}

 

 

2获取scofieldEnglish成绩信息

package com.xusheng.nosql.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.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 hbase_query {

 

    /**

     * @param args

     */

    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.zookeeper.quorum","node1,node2,node3");

 

        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();

        }

    }

}

 

 

 

(三)Redis数据库操作

Student键值对如下:

zhangsan:

English: 69

Math: 86

Computer: 77

lisi:

English: 55

Math: 100

Computer: 88

 

1. 根据上面给出的键值对,完成如下操作:

1Redis的哈希结构设计出学生表Student键值可以用student.zhangsan和student.lisi来表示两个键值属于同一个表);  

 

(2)hgetall命令分别输出zhangsanlisi的成绩信息

 

(3)hget命令查询zhangsan的Computer成绩

 

(4)修改lisi的Math成绩,95

 

 

2.根据上面已经设计出的学生表Student,RedisJAVA客户端编程(jedis),实现如下操作:

1)添加数据:English:45  Math:89 Computer:100

该数据对应的键值对形式如下:

scofield:

English: 45

Math: 89

Computer: 100

 

package com.xusheng.nosql.redis;

import java.util.Map;

import redis.clients.jedis.Jedis;

 

public class jedis_test {

 

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        Jedis jedis = new Jedis("localhost");

        jedis.hset("student.scofield", "English","45");

        jedis.hset("student.scofield", "Math","89");

        jedis.hset("student.scofield", "Computer","100");

        Map<String,String>  value = jedis.hgetAll("student.scofield");

        for(Map.Entry<String, String> entry:value.entrySet())

        {

            System.out.println(entry.getKey()+":"+entry.getValue());

        }

    }

}

 

 

(2)获取scofieldEnglish成绩信息

package com.xusheng.nosql.redis;

 

import java.util.Map;

import redis.clients.jedis.Jedis;

 

public class jedis_query {

 

    /**

     * @param xusheng

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        Jedis jedis = new Jedis("localhost");

        String value=jedis.hget("student.scofield", "English");

        System.out.println("scofield's English score is:    "+value);

    }

}

 

 

 

(四)MongoDB数据库操作

Student文档如下:

{

“name”: “zhangsan”,

“score”: {

“English”: 69,

“Math”: 86,

“Computer”: 77

}

}

{

“name”: “lisi”,

“score”: {

“English”: 55,

“Math”: 100,

“Computer”: 88

}

}

 

1.根据上面给出的文档,完成如下操作:

1MongoDB Shell设计出student集合

2find()方法输出两个学生的信息

 

3find()方法查询zhangsan所有成绩(只显示score)

 

4)修改lisi的Math成绩,95

 

2.根据上面已经设计出的Student集合,用MongoDBJava客户端编程,实现如下操作:

1添加数据:English:45 Math:89  Computer:100

与上述数据对应的文档形式如下:

{

“name”: “scofield”,

“score”: {

“English”: 45,

“Math”: 89,

“Computer”: 100

}

}

   

package com.xusheng.nosql.MongoDB;

import java.util.ArrayList;

import java.util.List;

 

import org.bson.Document;

import com.mongodb.MongoClient;

import com.mongodb.client.MongoCollection;

import com.mongodb.client.MongoDatabase;

 

public class mongo_insert {

 

    /**

     * @param args

     */

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        //实例化一个mongo客户端

        MongoClient mongoClient = new MongoClient("localhost", 27017);

        //实例化一个mongo数据库

        MongoDatabase mongoDatabase = mongoClient.getDatabase("student");

        //获取数据库中某个集合

        MongoCollection<Document> collection = mongoDatabase.getCollection("student");

        //实例化一个文档,内嵌一个子文档

        Document document = new Document("name", "scofield").

                append("score", new Document("English", 45).

                        append("Math", 89).

                        append("Computer", 100));

        List<Document> documents = new ArrayList<Document>();

        documents.add(document);

        //将文档插入集合中

        collection.insertMany(documents);

        System.out.println("文档插入成功");

    }

}

 

 

2)获取scofield所有成绩成绩信息(只显示score)

package com.xusheng.nosql.MongoDB;

 

import com.mongodb.MongoClient;

import com.mongodb.client.MongoCollection;

import com.mongodb.client.MongoCursor;

import com.mongodb.client.MongoDatabase;

import org.bson.Document;

 

public class mongo_query {

 

 

/**

     * @param args

     */

 

    public static void main(String[] args) {

        // TODO Auto-generated method stub

        //实例化一个mongo客户端

        MongoClient  mongoClient=new MongoClient("localhost",27017);

        //实例化一个mongo数据库

        MongoDatabase mongoDatabase = mongoClient.getDatabase("student");

        //获取数据库中某个集合

        MongoCollection<Document> collection = mongoDatabase.getCollection("student");

        //进行数据查找,查询条件为name=scofield, 对获取的结果集只显示score这个域

        MongoCursor<Document>  cursor=collection.find( new Document("name","scofield")).

                projection(new Document("score",1).append("_id", 0)).iterator();

        while(cursor.hasNext())

            System.out.println(cursor.next().toJson());

    }

}

 

 

 

4.实验报告

题目:

NoSQL和关系数据库的操作比较

姓名

陈志峰

日期

实验环境:Hadoop版本:3.1.3

实验内容与完成情况:全部完成

出现的问题:无

解决方案(列出遇到的问题和解决办法,列出没有解决的问题):无

posted @ 2025-05-12 11:59  序章0  阅读(14)  评论(0)    收藏  举报