求在线考试系统源代码，做好的更好，用java语言写的，连接mysql数据库的，在线等，急！！谢谢

1.Java连接MySQL数据库

Java连接MySql需要下载JDBC驱动MySQL-connector-java-5.0.5.zip（举例，现有新版本）。然后将其解压缩到任一目录。我是解压到D盘，然后将其目录下的MySQL-connector-java-5.0.5-bin.jar加到classpath里，具体如下：

“我的电脑”->“属性” ->“高级” ->“环境变量”，在系统变量那里编辑classpath，将D:\MySQL-connector-java-5.0.5\MySQL-connector-java-5.0.5-bin.jar加到最后，在加这个字符串前要加“”，以与前一个classpath区分开。然后确定。

package hqs

import java.sql.*

public class DataBasePractice {

public static void main(String[] args) {

//声明Connection对象

Connection con

//驱动程序名

String driver = "com.mysql.jdbc.Driver"

//URL指向要访问的数据库名mydata

String url = "jdbc:mysql://localhost:3306/mydata"

//MySQL配置时的用户名

String user = "root"

//MySQL配置时的密码

String password = "root"

//遍历查询结果集

try {

//加载驱动程序

Class.forName(driver)

//1.getConnection()方法，连接MySQL数据库！！

con = DriverManager.getConnection(url,user,password)

if(!con.isClosed())

System.out.println("Succeeded connecting to the Database!")

//2.创建statement类对象，用来执行SQL语句！！

Statement statement = con.createStatement()

//要执行的SQL语句

String sql = "select * from student"

//3.ResultSet类，用来存放获取的结果集！！

ResultSet rs = statement.executeQuery(sql)

System.out.println("-----------------")

System.out.println("执行结果如下所示:")

System.out.println("-----------------")

System.out.println(" 学号" + "\t" + " 姓名")

System.out.println("-----------------")

String name = null

String id = null

while(rs.next()){

//获取stuname这列数据

name = rs.getString("stuname")

//获取stuid这列数据

id = rs.getString("stuid")

//首先使用ISO-8859-1字符集将name解码为字节序列并将结果存储新的字节数组中。

//然后使用GB2312字符集解码指定的字节数组。

name = new String(name.getBytes("ISO-8859-1"),"gb2312")

//输出结果

System.out.println(id + "\t" + name)

}

rs.close()

con.close()

} catch(ClassNotFoundException e) {

//数据库驱动类异常处理

System.out.println("Sorry,can`t find the Driver!")

e.printStackTrace()

} catch(SQLException e) {

//数据库连接失败异常处理

e.printStackTrace()

}catch (Exception e) {

// TODO: handle exception

e.printStackTrace()

}finally{

System.out.println("数据库数据成功获取！！")

}

}

}

2.添加、修改、删除 *** 作

在上面while代码段后面添加以下代码段：String name = null

String id = null

while(rs.next()){

//获取stuname这列数据

name = rs.getString("stuname")

//获取stuid这列数据

id = rs.getString("stuid")

//首先使用ISO-8859-1字符集将name解码为字节序列并将结果存储新的字节数组中。

//然后使用GB2312字符集解码指定的字节数组。

name = new String(name.getBytes("ISO-8859-1"),"gb2312")

//输出结果

System.out.println(id + "\t" + name)

}

PreparedStatement psql

ResultSet res

//预处理添加数据，其中有两个参数--“？”

psql = con.prepareStatement("insert into student values(?,?)")

psql.setInt(1, 8) //设置参数1，创建id为5的数据

psql.setString(2, "xiaogang") //设置参数2，name 为小明

psql.executeUpdate() //执行更新

//预处理更新（修改）数据

psql = con.prepareStatement("update student set stuname = ? where stuid = ?")

psql.setString(1,"xiaowang") //设置参数1，将name改为王五

psql.setInt(2,10) //设置参数2，将id为2的数据做修改

psql.executeUpdate()

//预处理删除数据

psql = con.prepareStatement("delete from student where stuid = ?")

psql.setInt(1, 5)

psql.executeUpdate()

//查询修改数据后student表中的数据

psql = con.prepareStatement("select*from student")

res = psql.executeQuery() //执行预处理sql语句

System.out.println("执行增加、修改、删除后的数据")

while(res.next()){

name = res.getString("stuname")

id = res.getString("stuid")

name = new String(name.getBytes("ISO-8859-1"),"gb2312")

System.out.println(id + "\t" + name)

}

res.close()

psql.close()

该代码段使用到了预处理语句：con.prepareStatement(String sql)

这样生成数据库底层的内部命令，并将该命令封装在preparedStatement对象中，可以减轻数据库负担，提高访问数据库速度。 运行结果：

有完整源代码，附上数据库部分代码参考：

CREATE TABLE [dbo].[JudgeProblem](

[ID] [int] IDENTITY(1,1) NOT NULL,

[CourseID] [int] NOT NULL,

[Title] [varchar](1000) NOT NULL,

[Answer] [bit] NOT NULL,

CONSTRAINT [PK_JudgeProblem] PRIMARY KEY CLUSTERED

(

[ID] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

) ON [PRIMARY]

GO

SET ANSI_PADDING OFF

GO

CREATE TABLE [dbo].[MultiProblem](

[ID] [int] IDENTITY(1,1) NOT NULL,

[CourseID] [int] NOT NULL,

[Title] [varchar](1000) NOT NULL,

[AnswerA] [varchar](500) NOT NULL,

[AnswerB] [varchar](500) NOT NULL,

[AnswerC] [varchar](500) NOT NULL,

[AnswerD] [varchar](500) NOT NULL,

[Answer] [varchar](50) NOT NULL,

CONSTRAINT [PK_MultiProblem] PRIMARY KEY CLUSTERED

(

[ID] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

) ON [PRIMARY]

GO

SET ANSI_PADDING OFF

GO

CREATE TABLE [dbo].[Student](

[ID] [varchar](50) NOT NULL,

[Name] [varchar](20) NULL,

[PWD] [varchar](20) NULL,

[Sex] [varchar](2) NULL,

[JoinTime] [varchar](20) NULL,

[Question] [varchar](50) NULL,

[Answer] [varchar](50) NULL,

[profession] [varchar](50) NULL,

CONSTRAINT [PK_tb_Student] PRIMARY KEY CLUSTERED

(

[ID] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

) ON [PRIMARY]

GO

SET ANSI_PADDING OFF

GO

CREATE TABLE [dbo].[Score](

[ID] [int] IDENTITY(1,1) NOT NULL,

[UserID] [varchar](20) NOT NULL,

[PaperID] [int] NOT NULL,

[Score] [int] NOT NULL,

[ExamTime] [datetime] NOT NULL CONSTRAINT [DF_Score_ExamTime] DEFAULT (getdate()),

CONSTRAINT [PK_Score] PRIMARY KEY CLUSTERED

(

[ID] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

) ON [PRIMARY]

GO

SET ANSI_PADDING OFF

GO

CREATE TABLE [dbo].[Course](

[ID] [int] IDENTITY(1,1) NOT NULL,

[Name] [varchar](200) NOT NULL,

PRIMARY KEY CLUSTERED

(

[ID] ASC

)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]

) ON [PRIMARY]

GO

SET ANSI_PADDING OFF

GO

做这个题库系统需要按照mvc设计一下, 最近我也实现一个类似的, 下面说下我的设计

数据库mysql+开发环境eclipse+jdk1.8, 然后基于一个整合框架把项目搭建起来

设计基础试题表, 这个主要有类型难度等等

设计试卷表, 试卷表由create的时候根据输入的规则自动根据上面的基础题库表组装而成

剩下的用户管理, 导出就比较容易了, 导出可以用poi导出成word

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