.实验内容与完成情况:(实验具体步骤和实验截图说明)
(一) MySQL 数据库操作
学生表 Student
Name English Math Computer zhangsan
lisi 根据上面给出的 Student 表,在 MySQL 数据库中完成如下操作:
()在 MySQL 中创建 Student 表,并录入数据;
()用 SQL 语句输出 Student 表中的所有记录;
()查询 zhangsan 的 Computer 成绩;
()修改 lisi 的 Math 成绩, 改为 。
根据上面已经设计出的 Student 表,使用 MySQL 的 JAVA 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 源代码:
package com.mysql; import java.sql.*; public class MysqlTest {
static final String driver="com.mysql.jdbc.Driver";
static final String DB="jdbc:mysql://localhost/test1";
static final String user="root";
static final String password="wangli";
public static void main(String[] args) {
Connection conn=null;
Statement stmt=null;
try {
Class.forName(driver);
conn=DriverManager.getConnection(DB,user,password);
stmt=conn.createStatement();
String sql="insert into Student values('scofied',45,89,100)";
stmt.executeUpdate(sql);
System.out.println("插入成功!"); } catch (SQLException | ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
if(stmt!=null) { try {
stmt.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} }
if(conn!=null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
} }
} (2) 获取 scofield 的 English 成绩信息
源代码:
package com.mysql; import java.sql.*; public class MysqlTest {
static final String driver="com.mysql.jdbc.Driver";
static final String DB="jdbc:mysql://localhost/test1";
static final String user="root";
static final String password="wangli";
public static void main(String[] args) {
Connection conn=null;
Statement stmt=null;
ResultSet rs=null;
try {
Class.forName(driver);
conn=DriverManager.getConnection(DB,user,password);
stmt=conn.createStatement();
String sql="select Name,English from Student where Name='scofied' "; rs=stmt.executeQuery(sql);
System.out.println("name"+"\t\t"+"English");
while(rs.next()) {
System.out.print(rs.getString()+"\t\t");
System.out.println(rs.getString());
}
System.out.println("输出完成!"); } catch (SQLException | ClassNotFoundException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}finally {
if(stmt!=null) { try {
stmt.close();
} catch (SQLException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} }
if(conn!=null) {
try {
conn.close();
} catch (SQLException e) {
e.printStackTrace();
}
}
}
}
}
(二) HBase 数据库操作
学生表 Student
name score
English Math Computer
zhangsan
lisi 根据上面给出的学生表 Student 的信息, 执行如下操作:
() 用 Hbase Shell 命令创建学生表 Student;
()用 scan 命令浏览 Student 表的相关信息;
()查询 zhangsan 的 Computer 成绩;
()修改 lisi 的 Math 成绩, 改为 。
.根据上面已经设计出的 Student 表, 用 HBase API 编程实现以下操作:
()添加数据: English: Math: Computer:
scofield 源代码:
package hbase_test;
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 HBaseTest {
public static Configuration configuration;
public static Connection connection;
public static Admin admin; public static void main(String[] args) {
configuration=HBaseConfiguration.create();
configuration.set("hbase.rootdir", "hdfs://localhost:9000/hbase");
try {
connection=ConnectionFactory.createConnection(configuration);
admin=connection.getAdmin();
insertRow("Student","scofield","score","English","");
insertRow("Student","scofield","score","Math","");
insertRow("Student","scofield","score","Computer","");
System.out.println("插入成功!");
} 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) {
try {
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();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} } public static void close() { try {
if (admin != null) {
admin.close();
}
if(null!=connection) {
connection.close();
}
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} } }
(2)获取 scofield 的 English 成绩信息。
源代码:
package hbase_test; 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 HBaseTest2 {
public static Configuration configuration;
public static Connection connection;
public static Admin admin; public static void main(String[] args) {
configuration=HBaseConfiguration.create();
configuration.set("hbase.rootdir", "hdfs://localhost:9000/hbase");
try {
connection=ConnectionFactory.createConnection(configuration);
admin=connection.getAdmin();
getData("Student","scofield","score","English");
System.out.println("输出完成!");
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} close();
} public static void getData(String tableName, String rowKey, String colFamily, String col) {
try {
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();
} catch (IOException e) {
// TODO Auto-generated catch block
e.printStackTrace();
} } private 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.cloneValue(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) {
// TODO Auto-generated catch block
e.printStackTrace();
} } } (三) Redis 数据库操作
Student 键值对如下:
zhangsan:{
English:
Math:
Computer:
}
lisi:{
English:
Math:
Computer:
} . 根据上面给出的键值对, 完成如下操作:
()用 Redis 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);
() 用 hgetall 命令分别输出 zhangsan 和 lisi 的成绩信息;
() 用 hget 命令查询 zhangsan 的 Computer 成绩;
()修改 lisi 的 Math 成绩, 改为 。
.根据上面已经设计出的学生表 Student, 用 Redis 的 JAVA 客户端编程(jedis),实现如下
操作:
()添加数据: English: Math: Computer:
该数据对应的键值对形式如下:
scofield:{
English:
Math:
Computer: }
(四) MongoDB 数据库操作
Student 文档如下:
{
“name”: “zhangsan”,
“score”: {
“English”: ,
“Math”: ,
“Computer”:
} } {
“name”: “lisi”,
“score”: {
“English”: ,
“Math”: ,
“Computer”:
} } .根据上面给出的文档,完成如下操作:
() 用 MongoDB Shell 设计出 student 集合;
()用 find()方法输出两个学生的信息;
()用 find()方法查询 zhangsan 的所有成绩(只显示 score 列);
()修改 lisi 的 Math 成绩, 改为 。
.根据上面已经设计出的 Student 集合,用 MongoDB 的 Java 客户端编程,实现如下操作:
() 添加数据: English: Math: Computer: 与上述数据对应的文档形式如下:
{
“name”: “scofield”,
“score”: {
“English”: ,
“Math”: ,
“Computer”:
} } 源代码:
package com.mongo; 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 MongoTest {
public static void main(String[] args) {
MongoClient mongoClient=new MongoClient("localhost",);
MongoDatabase mongoDatabase=mongoClient.getDatabase("student");
MongoCollection<Document> collection=mongoDatabase.getCollection("student");
Document document=new Document("name","scofield").append("score",
new Document("English",).append("Math", ).append("Computer",
));
List<Document> documents=new ArrayList<Document>();
documents.add(document);
collection.insertMany(documents);
System.out.println("文档插入成功!");
} }
实验截图: (2)获取 scofield 的所有成绩成绩信息(只显示 score 列)
源代码: package com.mongo; import org.bson.Document; import com.mongodb.MongoClient;
import com.mongodb.client.MongoCollection;
import com.mongodb.client.MongoCursor;
import com.mongodb.client.MongoDatabase; public class MongoTest2 { public static void main(String[] args) {
MongoClient mongoClient=new MongoClient("localhost",);
MongoDatabase mongoDatabase=mongoClient.getDatabase("student");
MongoCollection<Document> collection=mongoDatabase.getCollection("student");
MongoCursor<Document> cursor=collection.find(new Document("name","scofield")).
projection(new Document("score",).append("_id", )).iterator();
while(cursor.hasNext())
System.out.println(cursor.next().toJson());
}
}