基于javaweb+JSP+Servlet学生在线选课系统(管理员、教师、学生)

开发工具：eclipse/idea/myeclipse/sts等均可配置运行

适用

课程设计，大作业，毕业设计，项目练习，学习演示等

}
	#middle > div { display: table-row; }
	#middle > div > div { display: table-cell; vertical-align: top; }

	#mainLeft {
	  width: 190px;
	  transition: width 0.4s;
	  height:400px;
	  padding-left: 7px;
	  padding-top:20px;
	}

	#middle{
		display:table;
		table-layout:fixed;
		background-color:#6495ED;
		margin-top:0;
		width:100%;
		heigth:950px;
	}
	#nav-wrapper{
		margin-top: 2px;
		padding: 0.75em;
		background-color:#ADD8E6;
		border-right: 1px solid #bbb;

				if(rs!=null)rs.close();
				if(pstmt!=null)pstmt.close();
				if(connection!=null)connection.close();
			}catch(SQLException e) {
				e.printStackTrace();
			}		
		}
	}
	
	//查询空闲教室
	public List<Room> roomQuery() {
		Connection connection=null;
		PreparedStatement pstmt=null;
		ResultSet rs=null;
		Room room=null;
		List<Room>rooms=new ArrayList<Room>();
		try{
			DBUtil con=new DBUtil();
			connection=con.getConnection();
			String sql="select * from room";
			pstmt=connection.prepareStatement(sql);
			rs=pstmt.executeQuery();			
			while(rs.next()) {	
				String rname=rs.getString("roomName");
				String rnum=rs.getString("roomNum");
				String rtime=rs.getString("roomTime");
				room=new Room(rname,rnum,rtime);

		}catch(Exception e) {
			e.printStackTrace();
			return null;
		}finally {
			try {
				if(rs!=null)rs.close();
				if(pstmt!=null)pstmt.close();
				if(connection!=null)connection.close();
			}catch(SQLException e) {
				e.printStackTrace();
			}		
		}
	}
	//查询某学生选课情况
	public List<Course> courseQuery(String sid) {
		Connection connection=null;
		PreparedStatement pstmt=null;
		ResultSet rs=null;
		Course course=null;
		List<Course>courses=new ArrayList<Course>();
		try{
			DBUtil con=new DBUtil();
			connection=con.getConnection();
			String sql="select choosecourse.cId,cName,credit,period,cPlace,tName from choosecourse,course,teacher where choosecourse.cId=course.cId and course.tId=teacher.tId and sId=?";
			pstmt=connection.prepareStatement(sql);

	td{text-align:center}
</style>
<style type="text/css">
body, input {
  font-family: 'Open Sans', sans-serif;
  font-size: 10.5pt;
}
table {
  border-collapse: collapse;
  text-align: left;
}
	#middle > div { display: table-row; }
	#middle > div > div { display: table-cell; vertical-align: top; }

	#mainLeft {
	  width: 190px;
	  transition: width 0.4s;
	  height:400px;
	  padding-left: 7px;
	  padding-top:20px;
	}

			}
		}

		public boolean isExistCourse(String cid,String tid) {//true:此人存在	 false：此人不存在
			return queryByCid(cid,tid)==null? false:true;
		}
		public Course queryByCid(String cid, String tid) {
			Connection connection=null;
			PreparedStatement pstmt=null;
			ResultSet rs=null;
			Course course=null;
			try{
				DBUtil con=new DBUtil();
				connection=con.getConnection();
				String sql="select * from course where cId=? and tId=?";
				pstmt=connection.prepareStatement(sql);
				pstmt.setString(1, cid);	//替换上面的？
				pstmt.setString(2, tid);
				rs=pstmt.executeQuery();
				if(rs.next()) {	//只有一条数据，不用循环		
					String cId=rs.getString("cId");
					String cName=rs.getString("cName");
					String tId=rs.getString("tId");
					String credit=rs.getString("credit");
					String period=rs.getString("period");
					String cPlace=rs.getString("cPlace");

		this.tName = tName;
		this.tPass = tPass;
		this.dId = dId;
		this.tSex = tSex;
		this.tAge = tAge;
		this.tEdu = tEdu;
		this.tTitle=tTitle;
		this.tSch=tSch;
		this.tHealth=tHealth;
	}
	
	public String gettId() {
		return tId;
	}
	public void settId(String tId) {
		this.tId = tId;
	}
	public String gettName() {
		return tName;
	}
	public void settName(String tName) {
		this.tName = tName;
	}
	public String gettPass() {
		return tPass;
	}
	public void settPass(String tPass) {
		this.tPass = tPass;

				<div id="mainLeft">
					<div id="nav-wrapper">
						<nav>
							<div>
							<h2 id="hea">学生选课系统</h2><br>
							<ul>
								<li>
								<a href="TeaQueryByTidServlet?tid=<%=(String)session.getAttribute("id")%>">个人信息</a><hr>
								</li>
								<li>
								<a href="teacherMod.jsp">密码修改</a><hr>
								</li>
								<li>
								<a href="TeaAllCourseQueryServlet?tid=<%=(String)session.getAttribute("id")%>">录入成绩</a><hr>
								</li>
								<li>
								<a href="TeaLookcourseQueryServlet?tid=<%=(String)session.getAttribute("id")%>">查询选课</a><hr>
								</li>
								<li>
								<a href="classroom.jsp">查询教室</a><hr>
								</li>
								<li>
								<a href="TeaDeleteServlet?tid=<%=(String)session.getAttribute("id")%>">注销</a><hr>
								</li>
							</ul>
							<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
							</div>
						</nav>

			if(row>0) {
				return true;
			}
			else {
				return false;
			}
		}catch(ClassNotFoundException e) {
			e.printStackTrace();
			return false;
		}catch(SQLException e) {
			e.printStackTrace();
			return false;
		}catch(Exception e) {
			e.printStackTrace();
			return false;
		}finally {
			try {
				if(pstmt!=null)pstmt.close();
				if(connection!=null)connection.close();
			}catch(SQLException e) {
				e.printStackTrace();
			}		
		}
	}	
	

			return false;
		}catch(SQLException e) {
			e.printStackTrace();
			return false;
		}catch(Exception e) {
			e.printStackTrace();
			return false;
		}finally {
			try {
				if(pstmt!=null)pstmt.close();
				if(connection!=null)connection.close();
			}catch(SQLException e) {
				e.printStackTrace();
			}		
		}
	}
	
	//注销前删除该学生的所有选课记录，解决外码约束无法注销的问题

			pstmt.setString(1, cid);
			rs=pstmt.executeQuery();
			if(rs.next()) {	//只有一条数据，不用循环
				String numall=rs.getString("cNumAll");
				String num=rs.getString("cNum");
				count=Integer.parseInt(numall)-Integer.parseInt(num);
			}
			return count;
		}catch(ClassNotFoundException e) {
			e.printStackTrace();
			return 0;
		}catch(SQLException e) {
			e.printStackTrace();
			return 0;
		}catch(Exception e) {
			e.printStackTrace();
			return 0;
		}finally {
			try {
				if(rs!=null)rs.close();

	}
	public String gettPass() {
		return tPass;
	}
	public void settPass(String tPass) {
		this.tPass = tPass;
	}
	public String getdId() {
		return dId;
	}
	public void setdId(String dId) {
		this.dId = dId;
	}
	public String gettSex() {
		return tSex;

								<tr>
									<td>年龄：</td>
									<td><input type="text" name="tAge"></td>
								</tr>
								<tr>
									<td>学历：</td>
									<td><input type="text" name="tEdu"></td>
								</tr>
								<tr>
									<td>职称：</td>
									<td><input type="text" name="tTitle"></td>
								</tr>
								<tr>
									<td>毕业院校：</td>
									<td><input type="text" name="tSch"></td>
								</tr>
								<tr>
									<td>健康状况：</td>
									<td><input type="text" name="tHealth"></td>
								</tr>
								<tr><td><input type="submit" value="确认"/></td></tr>
							</table>	
						</form>
						</center>
					</div>

			DBUtil con=new DBUtil();
			connection=con.getConnection();
			String sql="delete from student where sId=?";
			pstmt=connection.prepareStatement(sql);
			pstmt.setString(1, sid);	//替换上面的？
			row=pstmt.executeUpdate();
			if(row>0) {
				return true;
			}
			else {
				return false;
			}
		}catch(ClassNotFoundException e) {
			e.printStackTrace();
			return false;
		}catch(SQLException e) {
			e.printStackTrace();

		else {
			return false;
		}
	}
	
	//根据学号注销学生
	public boolean deleteBySid(String sid) {
		if(studentDao.isExist(sid)) {	//学生存在
			studentDao.deleteRecordBySid(sid);	//先删除该学生的所有选课记录
			return studentDao.deleteStuBySid(sid) && studentDao.deleteStudetailBySid(sid);		
		}
		else {
			return false;
		}
	}
}
package com.demo.servlet;

import java.io.IOException;
import javax.servlet.ServletException;
import javax.servlet.annotation.WebServlet;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;

								<li>
								<a href="stuMessMod.jsp">密码修改</a><hr>
								</li>
								<li>
								<a href="StuGradeQueryServlet?sid=<%=(String)session.getAttribute("id")%>">成绩查询</a><hr>
								</li>
								<li>
								<a href="StuCourseQueryServlet?sid=<%=(String)session.getAttribute("id")%>">选课查询以及退选</a><hr>
								</li>
								<li>
								<a href="StuAllCourseQueryServlet">选课</a><hr>
								</li>
								<li>
								<a href="StuDeleteServlet?sid=<%=(String)session.getAttribute("id")%>">注销</a><hr>
								</li>
							</ul>
							<br><br><br><br><br><br><br><br><br><br><br><br><br><br><br><br>
							</div>

				String sql="select teacher.*,teadetail.* from teacher,teadetail where teacher.tId=teadetail.tId and teacher.tId=?";
				pstmt=connection.prepareStatement(sql);
				pstmt.setString(1, tid);	//替换上面的？
				rs=pstmt.executeQuery();
				if(rs.next()) {	//只有一条数据，不用循环		
					String tId=rs.getString("teacher.tId");
					String tName=rs.getString("tName");
					String tPass=rs.getString("tPass");
					String dId=rs.getString("dId");
					String tSex=rs.getString("tSex");
					String tAge=rs.getString("tAge");
					String tEdu=rs.getString("tEdu");
					String tTitle=rs.getString("tTitle");
					String tSch=rs.getString("tSch");
					String tHealth=rs.getString("tHealth");

		if(!result) {	//注册失败
			request.setAttribute("error", "addError");
		}
		else {	//注册成功
			request.setAttribute("error", "addSuccess");
		}
		request.getRequestDispatcher("addstudent.jsp").forward(request, response);	//StudentQueryAllServlet直接转发给StudentInfoList.jsp,不需要进行处理
	}
	
	protected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
		doGet(request, response);
	}

}
package com.demo.vo;

		//删除管理员
		public boolean deleteAdminByAid(String aid) {
			Connection connection=null;
			PreparedStatement pstmt=null;
			int row;
			try{
				DBUtil con=new DBUtil();
				connection=con.getConnection();
				String sql="delete from admin where aId=?";
				pstmt=connection.prepareStatement(sql);
				pstmt.setString(1, aid);	//替换上面的？
				row=pstmt.executeUpdate();
				if(row>0) {
					return true;
				}
				else {
					return false;
				}
			}catch(ClassNotFoundException e) {
				e.printStackTrace();
				return false;
			}catch(SQLException e) {
				e.printStackTrace();
				return false;
			}catch(Exception e) {
				e.printStackTrace();
				return false;
			}finally {
				try {

	}
}
package com.demo.service;

import java.util.List;

import com.demo.dao.StudentDao;
import com.demo.vo.Course;
import com.demo.vo.Score;
import com.demo.vo.Student;

//业务逻辑层（逻辑性的增删改）（如 增：查+增 对Dao层进行的组装）
public class StudentService {
	StudentDao studentDao=new StudentDao();
	
	//根据学号查询学生个人信息
	public Student queryBySid(String sid) {

		heigth:950px;
	}
	#nav-wrapper{
		margin-top: 2px;
		padding: 0.75em;
		background-color:#87CEFA;
		border-right: 1px solid #bbb;
		border-bottom: 1px solid #bbb;
		font-size: 10pt;
		border-bottom-right-radius: 0px;
		box-shadow: 0 0 5px #aaa;
		heigth:400px;
	}
	#nav-wrapper1{
		margin-top: 2px;
		padding: 0.75em;

				}		
			}
		}
		//增加学生
		public boolean addStudent(Student student1) {
			Connection connection=null;
			PreparedStatement pstmt=null;
			int row;
			try{
				DBUtil con=new DBUtil();
				connection=con.getConnection();
				String sql="insert into student(sId,sName,sPass,dId) values(?,?,?,?)";
				pstmt=connection.prepareStatement(sql);
				pstmt.setString(1, student1.getsId());	//替换上面第一个？
				pstmt.setString(2, student1.getsName());	//替换上面第二个？
				pstmt.setString(3, student1.getsPass());
				pstmt.setString(4, student1.getdId());

运行环境

Java≥8、Tomcat≥7.0、MySQL≥5.5

开发工具

eclipse/idea/myeclipse/sts等均可配置运行

技术框架

CSS JavaScript JSP Servlet JDBC MySQL

适用

课程设计，大作业，毕业设计，项目练习，学习演示等

功能说明

管理员：个人信息、学生、老师、学生、课程等管理

教师：个人信息、成绩、选课管理、教室查看

学生：个人信息、成绩查看、选课和查看

eclipse或MyEclipse或idea

管理员

学生

教师