学生选课系统（Java语言期末前测试）

  测试具体要求：

2.系统要求与功能设计

2.1 页面要求

（1）能够在Tomcat服务器中正确部署，并通过浏览器查看；

（2）网站页面整体风格统一；

（3）首页(登录页)要求实现不同用户登录后，进入的功能页不相同。

（4）教师功能页：有添加课程、修改个人信息、浏览选课学生信息三个模块。

（5）学生功能页：有修改个人信息、浏览课程信息、选课三个功能模块。

（5）管理员功能页：有添加教师信息、添加学生信息两个模块。

2.2功能要求：

（1）添加教师信息：管理员可以添加教师基本信息，教师基本信息包括：教师工号（八位数字组成，例如02000081）、教师姓名、教师性别、教师所在学院、职称（教授、副教授、讲师、助教）组成；

（2）添加学生信息：管理可以添加学生基本信息，学生基本信息包括学号（八位数字组成，例如20180052）、学生姓名、学生性别、所在班级、所属专业组成；

（3）添加课程信息：教师登陆后，可以添加自己任职的课程基本信息，课程基本信息包括：课程编号（六位数字组成，例如050013），课程名称、选课人数、任课教师（任课教师不需录入，那位教师填写课程信息，那位教师就是任课教师）；

（4）修改个人信息：教师或学生登陆后可以修改个人信息，但教师工号或学号不能修改，另外教师或学生只能修改自己的信息，无法看到或修改其他学生或教师的基本信息。

（5）浏览课程信息：学生登陆后可以看到所有课程的列表信息，点击课程名称可以查看课程的详细信息,包括已选课人数；点击教师名称可以查看教师的详细信息。

（6）选课：进入选课页面，课程信息列表显示所有选课人数未达到课程设置的选课人数上限，点击课程名称可以看到课程详细信息，点击课程详细信息页面的“选课”按钮，可以实现选课功能。

（7）浏览选课学生信息：教师进入该页面后，可以看到自己设置的课程信息列表，点击课程名称，可以看到，选择该课程的所有学生基本信息列表。

（8）登陆功能：管理员、教师、学生登陆后可以看到不同的功能页面，教师或学生登陆后只能看到自己的相关信息，不同教师、不同学生登陆后无法查看其他人的信息。（要求至少创建两个教师用户、十个学生用户演示选课过程）

3数据库设计：

要求实现课程基本信息表、教师基本信息表、学生基本信息表、选课基本信息表。（提示：选课基本信息包括课程编号、教师编号、学号等基本信息）

4、WEB发布：

要求可以实现在浏览器直接访问系统。

如有错误敬请指正

系统简单解释：

1.创建学生或教师的时候id和初始密码一致

2.在程序中使用cookie 来传递参数（emmm  目前只是简单运用）

3.对于身份的判定是在每一个账号后边加status 状态判定

1 为学生  2为教师 3 为管理员

4.对于选课存储时储存在了学生表的class 中，存储类型为课程编号，用String类型进行拼接，查询时进行模糊查询

5.对于选课的人数限制没有完善。

使用jar 包：

数据库建表如下：

代码实现：

com.Bean 类

 package com.Bean;

 public class classes {
     private String name;
     private String teacher;
     private String pid;
     private String number;
     private String count;

     public classes(String name, String teacher, String pid, String number) {
         super();
         this.name = name;
         this.teacher = teacher;
         this.pid = pid;
         this.number = number;
     }
     public classes(String name, String teacher, String pid, String number, String count) {
         super();
         this.name = name;
         this.teacher = teacher;
         this.pid = pid;
         this.number = number;
         this.count = count;
     }
     public String getCount() {
         return count;
     }
     public void setCount(String count) {
         this.count = count;
     }
     public String getName() {
         return name;
     }
     public String getNumber() {
         return number;
     }
     public void setNumber(String number) {
         this.number = number;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getTeacher() {
         return teacher;
     }
     public void setTeacher(String teacher) {
         this.teacher = teacher;
     }
     public String getPid() {
         return pid;
     }
     public void setPid(String pid) {
         this.pid = pid;
     }

 }

 package com.Bean;

 public class premission {

     private String name;
     private String pwd;

     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getPwd() {
         return pwd;
     }
     public void setPwd(String pwd) {
         this.pwd = pwd;
     }

 }

 package com.Bean;

 public class student {
     private String id;
     private String name;
     private String sex;
     private String classes;
     private String zhuanye;
     public String getId() {
         return id;
     }
     public student(String id, String name, String sex, String classes, String zhuanye) {
         super();
         this.id = id;
         this.name = name;
         this.sex = sex;
         this.classes = classes;
         this.zhuanye = zhuanye;
     }
     public void setId(String id) {
         this.id = id;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getSex() {
         return sex;
     }
     public void setSex(String sex) {
         this.sex = sex;
     }
     public String getClasses() {
         return classes;
     }
     public void setClasses(String classes) {
         this.classes = classes;
     }
     public String getZhuanye() {
         return zhuanye;
     }
     public void setZhuanye(String zhuanye) {
         this.zhuanye = zhuanye;
     }

 }

 package com.Bean;

 public class teacher {

     private String id;
     private String name;
     private String sex;
     private String xueyuan;
     private String zhicheng;
     public String getId() {
         return id;
     }
     public void setId(String id) {
         this.id = id;
     }
     public String getName() {
         return name;
     }
     public void setName(String name) {
         this.name = name;
     }
     public String getSex() {
         return sex;
     }
     public void setSex(String sex) {
         this.sex = sex;
     }
     public String getXueyuan() {
         return xueyuan;
     }
     public void setXueyuan(String xueyuan) {
         this.xueyuan = xueyuan;
     }
     public String getZhicheng() {
         return zhicheng;
     }
     public void setZhicheng(String zhicheng) {
         this.zhicheng = zhicheng;
     }
     public teacher(String id, String name, String sex, String xueyuan, String zhicheng) {
         super();
         this.id = id;
         this.name = name;
         this.sex = sex;
         this.xueyuan = xueyuan;
         this.zhicheng = zhicheng;
     }

 }

com.DBUtil类：基础链接

 package com.DBUtil;
 /**
  * 测试时主要要导入jar
  */

 import java.beans.Statement;
 import java.sql.Connection;
 import java.sql.DriverManager;
 import java.sql.PreparedStatement;
 import java.sql.ResultSet;
 import java.sql.SQLException;

 /**
  * 建立数据库连接
  * @author cuixingyu
  *
  */
 public class DBUtil {
     // 连接数据库 url路径和用户名 密码
     public static String db_url="jdbc:mysql://localhost:3306/db_database01?serverTimezone=UTC&characterEncoding=UTF-8&useSSL=false";
     public static String db_user="root";
     public static String db_password="101032";
     public static Connection getConn()  {
         Connection conn=null;
         try {
             // 数据库驱动加载
             Class.forName("com.mysql.cj.jdbc.Driver");
             try {
                 //链接数据库
                 conn=DriverManager.getConnection(db_url, db_user, db_password);
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
             System.out.println("驱动链接加载成功！");
         } catch (ClassNotFoundException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         //返回链接
         return conn;

     }

     //关闭函数
     public static void close(Statement state,Connection conn) {
         //只有状态和连接时，先关闭状态
         if(state!=null) {
             try {
                 ((Connection) state).close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }

         }
         if(conn!=null) {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }
     //关闭函数
     public static void close(PreparedStatement state,Connection conn) {
         if(state!=null) {
             try {
                 ((Connection) state).close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }

         }
         if(conn!=null) {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }

     public static void close(ResultSet rs,Statement state,Connection conn) {
         if(rs!=null) {
             try {
                 rs.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(state!=null) {
             try {
                 ((Connection) state).close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(conn!=null) {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }

   //关闭函数
     public static void close(java.sql.Statement state, Connection conn) {
         // TODO Auto-generated method stub
         if(state!=null)
         {
             try {
                 state.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(conn!=null) {
             try {
                 conn.close();
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }
     //测试主函数  利用Java运行来测试
     @SuppressWarnings("static-access")
     public static void main(String[] args) throws SQLException {
         DBUtil dbu=new DBUtil();
         dbu.getConn();
     }
 }

com.Dao 类

 package com.Dao;

 import java.sql.Connection;
 import java.sql.ResultSet;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.ArrayList;
 import java.util.List;

 import com.Bean.classes;
 import com.Bean.student;
 import com.Bean.teacher;
 import com.DBUtil.DBUtil;

 public class Dao {
         //获取登陆用户的身份信息
     public int login(String username, String password) {

         Connection conn = DBUtil.getConn();
         Statement state =null;
         ResultSet rs = null;
         int flag=0;
         String sql = "select * from login where name='"+username+"' and  pwd = '"+password+"'";
         try {
             state = conn.createStatement();
         } catch (SQLException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         } 

         try {
             rs=state.executeQuery(sql);
         } catch (SQLException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }

          try {
             while(rs.next()) {
                 flag=rs.getInt("status");
              }
         } catch (SQLException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         return flag;
     }
     //在学生界面添加学生信息  --- 未读题
     public void addstudent(String id, String name, String sex, String classes, String zhuanye) throws Exception {
         Connection conn = DBUtil.getConn();
         Statement state =null;
         ResultSet rs = null;
         String sql="insert into student(pid,name,sex,classes,zhuanye) values('"+id+"','"+name+"','"+sex+"','"+classes+"','"+zhuanye+"')";
         state = conn.createStatement();
         state.executeUpdate(sql);
         DBUtil.close(state, conn);
     }
    //遍历所有的课程
     public List<classes> searchclasses() {

             //构建遍历函数
             List<classes>list =new ArrayList<>();
             //建立数据库链接
             Connection conn=DBUtil.getConn();
             //sql 语句 查询
             String sql="select * from classes";
             Statement pstmt = null;
             try {
                 //执行sql语句
                 pstmt = conn.createStatement();
                 ResultSet rs=pstmt.executeQuery(sql);
                 classes use=null;
                 while(rs.next()) {
                     //遍历获取的信息
                     String name=rs.getString("name");
                     String teacher=rs.getString("teacher");
                     String id=rs.getString("pid");
                     String number=rs.getString("number");
                     String count=rs.getString("count");

                     use=new classes(name,teacher,id,number,count);
                     list.add(use);
                 }
             } catch (SQLException e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
             finally {
                 DBUtil.close(pstmt, conn);
                 }

             return list;
             }
     //增设新课程
     public void addclasses(String name, String teacher, String pid, String number,String count) throws SQLException {
         Connection conn = DBUtil.getConn();
         Statement state =null;
         String sql="insert into classes(name,teacher,pid,number,count) values('"+name+"','"+teacher+"','"+pid+"','"+number+"','"+count+"')";
         state = conn.createStatement();
         state.executeUpdate(sql);
         DBUtil.close(state, conn);

     }
     //遍历学生的信息
     public static ArrayList<student> getstudent(String pid) throws Exception{
         ArrayList<student>list =new ArrayList<>();
         Connection conn=DBUtil.getConn();
         Statement pstmt = null;
         String sql="select * from student where pid = '"+pid+"'";
         pstmt = conn.createStatement();
         ResultSet rs=pstmt.executeQuery(sql);
         student student=null;
         while(rs.next()) {
             //遍历获取的信息
             String id=rs.getString("pid");
             String name=rs.getString("name");
             String sex=rs.getString("sex");
             String classes=rs.getString("classes");
             String zy=rs.getString("zhuanye");
             student=new student(id,name,sex,classes,zy);
             list.add(student);
             System.out.println(id);
             System.out.println(name);
             System.out.println(sex);
             System.out.println(classes);
             System.out.println(zy);
         }
         return list;

     }
     //遍历教师的信息
     public static ArrayList<teacher> getteacher(String pid) throws Exception{
         ArrayList<teacher>list =new ArrayList<>();
         Connection conn=DBUtil.getConn();
         Statement pstmt = null;
         String sql="select * from teacher where pid = '"+pid+"'";
         pstmt = conn.createStatement();
         ResultSet rs=pstmt.executeQuery(sql);
         teacher teacher=null;
         while(rs.next()) {
             //遍历获取的信息
             String id=rs.getString("pid");
             String name=rs.getString("name");
             String sex=rs.getString("sex");
             String xy=rs.getString("xueyuan");
             String zc=rs.getString("zhicheng");
             teacher=new teacher(id,name,sex,xy,zc);
             list.add(teacher);
             System.out.println(id);
             System.out.println(name);
             System.out.println(sex);
             System.out.println(xy);
             System.out.println(zc);
         }
         return list;

     }

     //修改学生的个人信息  但是jsp学号不允许修改  在这里当作修改的索引
     public void updatestudent(String id, String name, String sex, String classes, String zhuanye) throws Exception {
         Connection conn = DBUtil.getConn();
         Statement state =null;
         String sql="update student set name='"+name+"',sex='"+sex+"',classes='"+classes+"',zhuanye='"+zhuanye+"'   where pid='"+id+"' ";
         state=conn.createStatement();
         state.executeUpdate(sql);

         DBUtil.close(state, conn);
     }
    // 修改教师个人信息
     public void updateteacher(String id, String name, String sex, String xueyuan, String zhicheng) throws Exception {
         Connection conn = DBUtil.getConn();
         Statement state =null;
         String sql="update teacher set name='"+name+"',sex='"+sex+"',xueyuan='"+xueyuan+"',zhicheng='"+zhicheng+"'   where pid='"+id+"' ";
         state=conn.createStatement();
         state.executeUpdate(sql);
         System.out.println("更新");
         DBUtil.close(state, conn);

     }

     public void addteacher(String id, String name, String sex, String classes, String zhuanye) throws Exception {
         Connection conn = DBUtil.getConn();
         Statement state =null;
         String sql="insert into teacher(pid,name,sex,xueyuan,zhicheng) values('"+id+"','"+name+"','"+sex+"','"+classes+"','"+zhuanye+"')";
         state = conn.createStatement();
         state.executeUpdate(sql);
         DBUtil.close(state, conn);

     }

     public void loginteacher(String id) throws Exception {
         Connection conn = DBUtil.getConn();
         Statement state =null;
         String sql="insert into login(name,pwd,status) values('"+id+"','"+id+"','"+2+"')";
         state = conn.createStatement();
         state.executeUpdate(sql);
         DBUtil.close(state, conn);

     }

     public void loginstudent(String id) throws Exception {
         Connection conn = DBUtil.getConn();
         Statement state =null;
         String sql="insert into login(name,pwd,status) values('"+id+"','"+id+"','"+1+"')";
         state = conn.createStatement();
         state.executeUpdate(sql);
         DBUtil.close(state, conn);

     }
     //选课
     public static void addclass(String name,String studentid,String id) throws Exception {
         Connection conn = DBUtil.getConn();
         Statement state =null;
         //给记录课程的数据库做标记
         String sql="select * from classes where name = '"+name+"'";
         state = conn.createStatement();
         ResultSet rs=state.executeQuery(sql);
         int count=0;
         String a=null;
         //获取已经选取该课程的人数
         while(rs.next()) {
              a=rs.getString("count");
         }
         //将人数加一
         count=Integer.parseInt(a);
         count++;
         a=Integer.toString(count);
         //更新选课人数
         String sql1="update classes set count='"+count+"'   where name='"+name+"' ";
         state.executeUpdate(sql1);
         //获取选课学生的先前选课情况
         String sql2="select * from student where pid = '"+studentid+"'";
         String kecheng=null;
         state = conn.createStatement();
         ResultSet rs1=state.executeQuery(sql2);

         while(rs1.next()) {
             kecheng=rs1.getString("class");
         }
         //添加一个新的编号
         kecheng=kecheng+","+id;
         //给选课的学生做标记  记录学生的选课信息  在学生的数据库内记录
         String sql3="update student set class='"+kecheng+"'   where pid='"+studentid+"' ";
         state.executeUpdate(sql3);
         DBUtil.close(state, conn);
     }
   //通过姓名查询教师信息  不准确
     public static List<teacher> getteachers(String names) throws Exception{
         ArrayList<teacher>list =new ArrayList<>();
         Connection conn=DBUtil.getConn();
         Statement pstmt = null;
         String sql="select * from teacher where name = '"+names+"'";
         pstmt = conn.createStatement();
         ResultSet rs=pstmt.executeQuery(sql);
         teacher teacher=null;
         while(rs.next()) {
             //遍历获取的信息
             String id=rs.getString("pid");
             String name=rs.getString("name");
             String sex=rs.getString("sex");
             String xy=rs.getString("xueyuan");
             String zc=rs.getString("zhicheng");
             teacher=new teacher(id,name,sex,xy,zc);
             list.add(teacher);
             System.out.println("查看教师信息");
         }
         return list;

     }
     //查询教师开设的课程
     public static List<classes> getclass(String names) throws Exception {
         // TODO Auto-generated method stub

         List<classes> list=new ArrayList<>();
         Connection conn = DBUtil.getConn();
         Statement state =null;
         String sql="select * from classes where teacher like '%"+names+"%'";
         state = conn.createStatement();
         ResultSet rs=state.executeQuery(sql);
         classes cs=null;
         while(rs.next()) {
             String name=rs.getString("name");
             String teacher=rs.getString("teacher");
             String id=rs.getString("pid");
             String number=rs.getString("number");
             String count=rs.getString("count");
             cs=new classes(name,teacher,id,number,count);
             list.add(cs);
             System.out.println("教师查询选课结果");
         }
         return list;
     }
     //获取学生信息  通过id查找
     public static List<student> getstudents(String id) throws Exception {
         List<student> list=new ArrayList<>();
         Connection conn = DBUtil.getConn();
         Statement state =null;
         //模糊查询
         String sql="select * from student where class like '%"+id+"%'";
         state = conn.createStatement();
         ResultSet rs=state.executeQuery(sql);
         student s=null;
         while(rs.next()) {
             String pid=rs.getString("pid");
             String name=rs.getString("name");
             String sex=rs.getString("sex");
             String classes=rs.getString("classes");
             String zy=rs.getString("zhuanye");
             s=new student(pid,name,sex,classes,zy);
             list.add(s);
         }
         return list;
     }

 }

com.Servlet 类：学生 教师 管理员 登陆

 package com.Servlet;

 import java.io.IOException;
 import java.io.UnsupportedEncodingException;

 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import com.Dao.Dao;

 /**
  * Servlet implementation class adminServlet
  */
 @WebServlet("/adminServlet")
 public class adminServlet extends HttpServlet {
     private static final long serialVersionUID = 1L;

     protected void service(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException
     {
         req.setCharacterEncoding("UTF-8");

         String method = req.getParameter("method");
         if(method.equals("addstudent"))
         {
             try {
                 addstudent(req,resp);
             } catch (Exception e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }

         if(method.equals("addteacher"))
         {
             try {
                 addteacher(req,resp);
             } catch (Exception e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
     }
             //添加教师信息
     private void addteacher(HttpServletRequest req, HttpServletResponse resp) throws Exception {

         req.setCharacterEncoding("UTF-8");

         String id = req.getParameter("id");
          String name = req.getParameter("name");
          String sex = req.getParameter("sex");
          String classes = req.getParameter("classes");
          String zhuanye = req.getParameter("zhicheng");

          Dao dao=new Dao();
          System.out.println(zhuanye);
          dao.addteacher(id,name,sex,classes,zhuanye);
          dao.loginteacher(id);
          //添加完成重新刷新界面
          req.getRequestDispatcher("addteacher.jsp").forward(req, resp);
     }
         //添加学生信息
     private void addstudent(HttpServletRequest req, HttpServletResponse resp) throws Exception {
         // TODO Auto-generated method stub

         req.setCharacterEncoding("UTF-8");

         String id = req.getParameter("id");
         String name = req.getParameter("name");
         String sex = req.getParameter("sex");
         String classes = req.getParameter("classes");
         String zhuanye = req.getParameter("zhuanye");

         Dao dao=new Dao();
         dao.addstudent(id,name,sex,classes,zhuanye);
         dao.loginstudent(id);
         //跳转到新的界面
         req.getRequestDispatcher("addstudent.jsp").forward(req, resp);
     }

 }

 package com.Servlet;
 /*
  * 登陆界面调用的Servlet
  */

 import java.io.IOException;
 import java.io.UnsupportedEncodingException;

 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.Cookie;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import com.Bean.premission;
 import com.Dao.Dao;

 /**
  * Servlet implementation class LoginServlet
  */
 @WebServlet("/LoginServlet")
 public class LoginServlet extends HttpServlet {
     private static final long serialVersionUID = 1L;

      protected void service(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException
         {
             req.setCharacterEncoding("UTF-8");

             String method = req.getParameter("method");
             if(method.equals("login"))
             {
                 login(req,resp);
             }
         }

     private void login(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
         // TODO Auto-generated method stub
         try {
             req.setCharacterEncoding("UTF-8");
         } catch (UnsupportedEncodingException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
         String username = req.getParameter("user");
         String password = req.getParameter("password");
         System.out.println(username);
         System.out.println(password);
         premission p=new premission();
         p.setName(username);
         p.setPwd(password);
         Dao dao=new Dao();
         //获取登陆账号的身份权限信息
         int status=dao.login(username,password);
         //通过状态来跳转不同界面
         if(status==1) {
             System.out.println("学生");
             //设置cookie 作为边的参数
             Cookie cookie=new Cookie("student", username);
             cookie.setPath("/");
             //设置存活时间
             cookie.setMaxAge(60*60*24);
             resp.addCookie(cookie);
             req.getRequestDispatcher("student.jsp").forward(req, resp);
         }else if(status==2) {
             System.out.println("老师");
             //设置cookie 作为边的参数
             Cookie cookie=new Cookie("teacher", username);
             cookie.setPath("/");
             //设置存活时间
             cookie.setMaxAge(60*60*24);
             resp.addCookie(cookie);
             req.getRequestDispatcher("teacher.jsp").forward(req, resp);
         }else if(status==3) {
             System.out.println("管理员");
             //设置cookie 作为边的参数
             req.getRequestDispatcher("admin.jsp").forward(req, resp);
         }else if(status==0) {
             System.out.println("错误");
             req.getRequestDispatcher("error.jsp").forward(req, resp);
         }

     }

 }

 package com.Servlet;

 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.util.List;

 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import com.Bean.classes;
 import com.Dao.Dao;

 /**
  * Servlet implementation class StudentServlet
  */
 @WebServlet("/StudentServlet")
 public class StudentServlet extends HttpServlet {
     private static final long serialVersionUID = 1L;

      protected void service(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException
         {
             req.setCharacterEncoding("UTF-8");

             String method = req.getParameter("method");
             if(method.equals("add"))
             {
                 try {
                     add(req,resp);
                 } catch (Exception e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }
             }
             if(method.equals("show"))
             {
                 try {
                     show(req,resp);
                 } catch (Exception e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }
             }

             if(method.equals("update"))
             {
                 try {
                     update(req,resp);
                 } catch (Exception e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }
             }

             if(method.equals("addclasses")) {
                 try {
                     addclass(req,resp);
                 } catch (Exception e) {
                     // TODO Auto-generated catch block
                     e.printStackTrace();
                 }
             }

         }
   //选课
     private void addclass(HttpServletRequest req, HttpServletResponse resp) throws Exception {
         req.setCharacterEncoding("UTF-8");
         String name=req.getParameter("name");
         String studentid=req.getParameter("studentid");
         String id=req.getParameter("id");
         Dao.addclass(name,studentid,id);
         req.getRequestDispatcher("show.jsp").forward(req, resp);
     }
  // 修改学生信息
     private void update(HttpServletRequest req, HttpServletResponse resp) throws Exception {

             req.setCharacterEncoding("UTF-8");
             String id = req.getParameter("id");
             String name = req.getParameter("name");
             String sex = req.getParameter("sex");
             String classes = req.getParameter("classes");
             String zhuanye = req.getParameter("zhuanye");
             Dao dao=new Dao();
             dao.updatestudent(id,name,sex,classes,zhuanye);
             req.getRequestDispatcher("update1.jsp").forward(req, resp);

     }
      //展示所有的课程
     private void show(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
         // TODO Auto-generated method stub
         req.setCharacterEncoding("UTF-8");

         Dao dao=new Dao();
         List<classes> list= dao.searchclasses();
         req.setAttribute("list", list);
         req.getRequestDispatcher("show.jsp").forward(req, resp);
     }
     // 添加学生信息
     private void add(HttpServletRequest req, HttpServletResponse resp) throws Exception {
         // TODO Auto-generated method stub
         try {
             req.setCharacterEncoding("UTF-8");
         } catch (UnsupportedEncodingException e) {
             // TODO Auto-generated catch block
             e.printStackTrace();
         }
      String id = req.getParameter("id");
      String name = req.getParameter("name");
      String sex = req.getParameter("sex");
      String classes = req.getParameter("classes");
      String zhuanye = req.getParameter("zhuanye");

      System.out.println(id);
      System.out.println(name);
      System.out.println(sex);
      System.out.println(classes);
      System.out.println(zhuanye);
      Dao dao=new Dao();

      dao.addstudent(id,name,sex,classes,zhuanye);

          //req.getRequestDispatcher("student.jsp").forward(req, resp);

     }

 }

 package com.Servlet;

 import java.io.IOException;
 import java.io.UnsupportedEncodingException;
 import java.sql.SQLException;
 import java.util.List;

 import javax.servlet.ServletException;
 import javax.servlet.annotation.WebServlet;
 import javax.servlet.http.HttpServlet;
 import javax.servlet.http.HttpServletRequest;
 import javax.servlet.http.HttpServletResponse;

 import com.Bean.classes;
 import com.Bean.student;
 import com.Bean.teacher;
 import com.Dao.Dao;

 /**
  * Servlet implementation class TeacherServlet
  */
 @WebServlet("/TeacherServlet")
 public class TeacherServlet extends HttpServlet {
     private static final long serialVersionUID = 1L;

     protected void service(HttpServletRequest req,HttpServletResponse resp)throws ServletException,IOException
     {
         req.setCharacterEncoding("UTF-8");

         String method = req.getParameter("method");
         if(method.equals("add"))
         {
             try {
                 add(req,resp);
             } catch (Exception e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(method.equals("update"))
         {
             try {
                 update(req,resp);
             } catch (Exception e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(method.equals("seacrch")) {
             try {
                 search(req,resp);
             } catch (Exception e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }

         if(method.equals("searchclass")) {
             try {
                 searchclass(req,resp);
             } catch (Exception e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }
         if(method.equals("checkstudent")) {
             try {
                 checkstudent(req,resp);
             } catch (Exception e) {
                 // TODO Auto-generated catch block
                 e.printStackTrace();
             }
         }

     }
     //查询所选课程的学生信息
     private void checkstudent(HttpServletRequest req, HttpServletResponse resp) throws Exception {
         req.setCharacterEncoding("UTF-8");
         String id=req.getParameter("id");
         //获取课程编号 据此查找学生 模糊
         List<student>list =Dao.getstudents(id);
         req.setAttribute("list", list);
         req.getRequestDispatcher("showstudentinfo.jsp").forward(req, resp);
     }
     //教师查询学生选课结果
     private void searchclass(HttpServletRequest req, HttpServletResponse resp) throws Exception {
         req.setCharacterEncoding("UTF-8");
         String name=req.getParameter("name");

         List<classes> list=Dao.getclass(name);
         req.setAttribute("list", list);
         req.getRequestDispatcher("showselectclass.jsp").forward(req, resp);
     }
    //查询教师信息
     private void search(HttpServletRequest req, HttpServletResponse resp) throws Exception {
         req.setCharacterEncoding("UTF-8");
         String name=req.getParameter("name");
         List<teacher> list=Dao.getteachers(name);
         req.setAttribute("list", list);
         req.getRequestDispatcher("showteacherinfo.jsp").forward(req, resp);
     }
     //修改教师个人信息
     private void update(HttpServletRequest req, HttpServletResponse resp) throws Exception {
         req.setCharacterEncoding("UTF-8");
         String id = req.getParameter("id");
         String name = req.getParameter("name");
         String sex = req.getParameter("sex");
         String xueyuan = req.getParameter("xueyuan");
         String zhicheng = req.getParameter("zhicheng");
         Dao dao=new Dao();
         dao.updateteacher(id,name,sex,xueyuan,zhicheng);
         req.getRequestDispatcher("update2.jsp").forward(req, resp);

     }
     //添加新的课程
     private void add(HttpServletRequest req, HttpServletResponse resp) throws UnsupportedEncodingException, SQLException {
         // TODO Auto-generated method stub
         req.setCharacterEncoding("UTF-8");

         String name = req.getParameter("name");
         String  teacher= req.getParameter("teacher");
         String pid = req.getParameter("id");
         String number = req.getParameter("number");
         String count="0";
         Dao dao=new Dao();
         dao.addclasses(name,teacher,pid,number,count);
     }
 }

jsp界面：

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>管理员添加学生</title>

 </head>
 <body>

 <div class="container">
     <section>
         <form action="StudentServlet?method=add" method="post" onsubmit="return check()">
             <span class="cname">学号</span>
             <input type="text" name="id" class="icname" placeholder="  class-name" id="id">
             <br/>

             <span class="teacher">姓名</span>
             <input type="text" name="name" class="iteacher" placeholder="  teacher" id="name">
             <br/>

             <span class="place">性别</span>
             <label><input type="radio" name="sex" id="sex" value="男">男</label>
                <label><input type="radio" name="sex" id="sex" value="女">女</label>
             <br/>

             <span class="place">班级</span>
             <input type="text" name="classes" class="iteacher" placeholder="  teacher" id="classes">
             <br/>

             <span class="place">专业</span>
             <input type="text" name="zhuanye" class="iteacher" placeholder="  teacher" id="zhuanye">
             <br/>

             <input type="submit" value="保存" class="butn">
             <br/>
         </form>
     </section>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

 <%@page import="com.Dao.*"%>
 <%@page import="com.Bean.*"%>
 <%@page import="org.apache.jasper.tagplugins.jstl.core.ForEach"%>
 <%@page import="java.util.ArrayList"%>
 <%@page import="java.util.List" %>
 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>教师添加新课程</title>

 </head>
 <script type="text/javascript">
 function onload()
 {
     <%
     Cookie[] cookies=request.getCookies();
     String value="";
     ArrayList<teacher> list=new ArrayList<>();
     if(cookies!=null){
         System.out.println("cookie的长度为:"+cookies.length);
         for(int i=0;i<cookies.length;i++)
         {

             if(cookies[i].getName().equals("teacher"))
             {
                 value=cookies[i].getValue();
                 System.out.println(value+":");
                 list=Dao.getteacher(value);
             }
         }
     }
     %>
 }
 </script>
 <body>

 <div class="container">
     <section>
         <form action="TeacherServlet?method=add" method="post" onsubmit="return check()">
              <%for(teacher s:list)
             {

             %>
             <span class="cname">课程名称</span>
             <input type="text" name="name" class="icname" placeholder="  class-name" id="name">
             <br/>

             <span class="teacher">课程教师</span>
             <input type="text" name="teacher" class="iteacher" readonly="readonly"  placeholder="  teacher" id="teacher" value=<%=s.getName() %>>
             <br/>
             <% } %>
             <span class="place">课程人数</span>
             <input type="text" name="number" class="iplace" placeholder=" number" id="number">
             <br/>

             <span class="place">课程编号</span>
             <input type="text" name="id" class="iplace" placeholder="  class-id" id="id">
             <br/>

             <input type="submit" value="保&nbsp;存" class="butn">
             <br/>
         </form>
     </section>
 </div>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>管理员添加学生</title>

 </head>
 <body>

 <div class="container">
     <section>
         <form action="adminServlet?method=addstudent" method="post" onsubmit="return check()">
             <span class="cname">学号</span>
             <input type="text" name="id" class="icname" placeholder="  xuehao" id="id">
             <br/>

             <span class="teacher">姓名</span>
             <input type="text" name="name" class="iteacher" placeholder="  name" id="name">
             <br/>

             <span class="place">性别</span>
             <label><input type="radio" name="sex" id="sex" value="男">男</label>
                <label><input type="radio" name="sex" id="sex" value="女">女</label>
             <br/>

             <span class="place">班级</span>
             <input type="text" name="classes" class="iteacher" placeholder="  banji" id="classes">
             <br/>

             <span class="place">专业</span>
             <input type="text" name="zhuanye" class="iteacher" placeholder="  zhuanye" id="zhuanye">
             <br/>

             <input type="submit" value="保存" class="butn">
             <br/>
         </form>
     </section>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>管理员添加教师</title>

 </head>
 <body>

 <div class="container">
     <section>
         <form action="adminServlet?method=addteacher" method="post" onsubmit="return check()">
             <span class="cname">工号</span>
             <input type="text" name="id" class="icname" placeholder="  id" id="id">
             <br/>

             <span class="teacher">姓名</span>
             <input type="text" name="name" class="iteacher" placeholder="  name" id="name">
             <br/>

             <span class="place">性别</span>
             <label><input type="radio" name="sex" id="sex" value="男">男</label>
                <label><input type="radio" name="sex" id="sex" value="女">女</label>
             <br/>

             <span class="place">学院</span>
             <input type="text" name="classes" class="iteacher" placeholder="  xueyuan" id="classes">
             <br/>

             <span class="place">职称</span>
                <select name="zhicheng" id="zhicheng">
                    <option value="教授">教授</option>
                    <option value="副教授">副教授</option>
                    <option value="讲师">讲师</option>
                    <option value="助教">助教</option>
                    </select>
             <br/>

             <input type="submit" value="保存" class="butn">
             <br/>
         </form>
     </section>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>课程信息管理系统:管理员界面</title>

 <style type="text/css">

 .headframe{
     width:100%;
     height:130px;
     border:0;
 }

 .leftframe{
     float:left;
     width:250px;
     height:600px;
     border:0;
 }

 .mainframe{
     float:right;
     width:1200px;
     height:600px;
     border:0;
 }

 </style>

 </head>

 <iframe src="head.jsp" class="headframe" scrolling="no"></iframe>
 <iframe src="left3.jsp" class="leftframe" scrolling="no"></iframe>
 <iframe src="main.jsp" name="mainAction" class="mainframe"></iframe>

 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>错误界面</title>
 </head>
 <body>
     用户不存在或者用户密码错误
 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>标题头</title>
 <style type="text/css">

 .headdiv{
     background-color:#3F51B5;
     width:100%;
     height:130px;
 }

 .headdiv P{
     font-family:YouYuan;
     font-size:20px;
     color:#E8EAF6;
     position:relative;
     left:20px;
     top:45px;
 }

 .headdiv a{
     font-family:YouYuan;
     font-size:20px;
     color:#E8EAF6;

     text-align:right;
 }

 </style>

 </head>
 <body>

 <div class="headdiv">
     <p>课程信息管理 </p> <br>
      &emsp;&emsp;<a href="index.jsp" target="_top">退出</a>
 </div>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>

 <%@page import="com.Servlet.*"%>
 <%@page import="com.Bean.*"%>
 <%@page import="com.DBUtil.*"%>
 <%@page import="com.Dao.*"%>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>登陆界面</title>
 <style type="text/css">

 .colorcloth{
     background-color:#3399FF;
     width:100%;
     height:210px;
 }

 .container{
      background-color:#FFFFFF;
      width:400px;
     height:210px;
     margin:200px auto;
 }

 .buser{
     position:relative;
     left:30px;
     top:5px;
     border-radius:3px;
     width:210px;
     height:20px;
     border:#DCDCDC 1px solid;
 }

 .buser:hover{
     box-shadow:0 0 12px #1E90FF;
 }

 .bpassword{
     position:relative;
     left:45px;
     top:20px;
     border-radius:3px;
     width:210px;
     height:20px;
     border:#DCDCDC 1px solid;
 }

 .bpassword:hover{
     box-shadow:0 0 12px #1E90FF;
 }

 .user{
     position:relative;
     left:20px;
     top:5px;
     font-size:14px;
     font-family:STHeiti;
     font-weight:600;
 }

 .password{
     position:relative;
     left:35px;
     top:20px;
     font-size:14px;
     font-family:STHeiti;
     font-weight:600;
 }

 .butn{
     position:relative;
     left:77px;
     top:55px;
     width:215px;
     height:25px;
     border-radius:3px;
     color:white;
     background-color:#0066CC;
     text-align:center;
     text-decoration:none;
     border:none;
 }

 .butn:hover{
     box-shadow:0 0 10px #0066CC;
 }

 .title{
     background-color:#FFFFFF;
     width:100%;
 }

 .title p{
     font-family:YouYuan;
     font-size:90px;
     color:#0066CC;
     text-align:center;
 }

 </style>
 </head>
 <body>
 <div class="title">
     <p>课程信息登录</p>
 </div>

 <div class="colorcloth">
 <div class="container">
     <section>
         <form action="LoginServlet?method=login" method="post">

             <span class="user">用户名</span>
             <input type="text" name="user" class="buser" placeholder="  Usename">
             <br/>
             <span class="password">密码</span>
             <input type="password" name="password" class="bpassword" placeholder="  Password">
             <br/>
             <input type="submit" value="登录" class="butn">
             <br/>
         </form>
     </section>
 </div>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>学生左侧栏</title>
 <style type="text/css">

 .leftMenu{
     background-color:#7986CB;
     width:250px;
     height:600px;
     position:relative;
     top:0px;
 }

 .menuParent{
     background-color:#BBDEFB;
 }

 </style>
 </head>
 <body>

 <div class="leftMenu">
     <div class="menu">

         <div class="menuParent">
             <div class="ListTitlePanel">
                 <div class="ListTitle">
                     <strong>课程信息管理</strong>
                     <div class="leftbgbt"></div>
                 </div>
             </div>

             <div class="menuList">
 <!--                 <div><a target="mainAction" href="add1.jsp">添加个人信息</a></div> -->
                 <div><a target="mainAction" href="update1.jsp">修改个人信息</a></div>
                 <div><a target="mainAction" href="StudentServlet?method=show">浏览课程信息</a></div>
             </div>
         </div>

     </div>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

 <%@page import="com.Dao.*"%>
 <%@page import="com.Bean.*"%>
 <%@page import="org.apache.jasper.tagplugins.jstl.core.ForEach"%>
 <%@page import="java.util.ArrayList"%>
 <%@page import="java.util.List" %>
 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>教师左侧栏</title>
 <style type="text/css">

 .leftMenu{
     background-color:#7986CB;
     width:250px;
     height:600px;
     position:relative;
     top:0px;
 }

 .menuParent{
     background-color:#BBDEFB;
 }

 </style>

 </head>
 <script type="text/javascript">

 function onload()
 {
     <%
     Cookie[] cookies=request.getCookies();
     String value="";
     ArrayList<teacher> list=new ArrayList<>();
     if(cookies!=null){
         System.out.println("cookie的长度为:"+cookies.length);
         for(int i=0;i<cookies.length;i++)
         {

             if(cookies[i].getName().equals("teacher"))
             {
                 value=cookies[i].getValue();
                 System.out.println(value+":");
                 list=Dao.getteacher(value);
             }
         }
     }
     %>
 }

 </script>
 <body onload="onload()">

 <div class="leftMenu">

     <div class="menu">

         <div class="menuParent">
             <div class="ListTitlePanel">
                 <div class="ListTitle">
                     <strong>课程信息管理</strong>
                     <div class="leftbgbt"></div>
                 </div>
             </div>
              <%for(teacher s:list)
             {

             %>
             <div class="menuList">
                 <div><a target="mainAction" href="add2.jsp">添加课程信息</a></div>
                 <div><a target="mainAction" href="update2.jsp">修改个人信息</a></div>
                 <div><a target="mainAction" href="TeacherServlet?method=searchclass&name=<%=s.getName() %>">浏览选课信息</a></div>
             </div>
             <% } %>
         </div>

     </div>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>管理员左侧栏</title>
 <style type="text/css">

 .leftMenu{
     background-color:#7986CB;
     width:250px;
     height:600px;
     position:relative;
     top:0px;
 }

 .menuParent{
     background-color:#BBDEFB;
 }

 </style>
 </head>
 <body>

 <div class="leftMenu">
     <div class="menu">

         <div class="menuParent">
             <div class="ListTitlePanel">
                 <div class="ListTitle">
                     <strong>课程信息管理</strong>
                     <div class="leftbgbt"></div>
                 </div>
             </div>

             <div class="menuList">
                 <div><a target="mainAction" href="addstudent.jsp">添加学生</a></div>
                 <div><a target="mainAction" href="addteacher.jsp">添加教师</a></div>
             </div>
         </div>

     </div>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>显示界面</title>
 </head>
 <body>

     <div align="left">
     <font style="background-color: blue">显示界面  </font>
     </div>
 </body>
 </html>

 <%@page import="com.Dao.*"%>
 <%@page import="com.Bean.*"%>
 <%@page import="org.apache.jasper.tagplugins.jstl.core.ForEach"%>
 <%@page import="java.util.ArrayList"%>
 <%@page import="java.util.List" %>
 <%@ page language="java" contentType="text/html; charset=utf-8"
     pageEncoding="utf-8"%>
     <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="utf-8">
 <title>课程浏览</title>
 </head>
 <script type="text/javascript">
 function onload()
 {
     <%
     Cookie[] cookies=request.getCookies();
     String value="";
     ArrayList<student> list=new ArrayList<>();
     if(cookies!=null){
         System.out.println("cookie的长度为:"+cookies.length);
         for(int i=0;i<cookies.length;i++)
         {

             if(cookies[i].getName().equals("student"))
             {
                 value=cookies[i].getValue();
                 System.out.println(value+":");
                 list=Dao.getstudent(value);
             }
         }
     }
     %>
 }
 </script >
 <body onload="onload()">
 <div align="center">
 <h1>课程信息浏览：</h1>

 <form action="StudentServlet?method=show" method="post" onsubmit="return check()">
 <table>
 <tr>
 <td>课程名称</td>
 <td>任课教师</td>
 <td>课程编号</td>
 <td>课程人数</td>
  <td align="center" colspan="1">操作</td>
 </tr>
 <c:forEach items="${list}" var="item">
 <tr>
  <td><a href="showclassinfo.jsp?name=${item.name}&teacher=${item.teacher}&pid=${item.pid}&number=${item.number}&count=${item.count}">${item.name}</a></td>
  <td><a href="TeacherServlet?method=seacrch&name=${item.teacher}">${item.teacher}</a></td>
  <td>${item.pid}</td>
  <td>${item.number}</td>
              <%for(student s:list)
             {

             %>
  <td><a href="StudentServlet?method=addclasses&name=${item.name}&studentid=<%=s.getId() %>&id=${item.pid}">选课</a></td>
            <% } %>
 </tr>
 </c:forEach>
 </table>
 </form>
 </div>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 </head>
 <body>
 <div align="center">

 <h1>课程详细信息查询</h1>
 <table border="1">
 <tr>
 <td>课程名称</td>
 <td>任课教师</td>
 <td>课程编号</td>
 <td>课程人数</td>
 <td>选课人数</td>
 </tr>
 <tr>
 <td>${param.name}</td>
 <td>${param.teacher}</td>
 <td>${param.pid}</td>
 <td>${param.number}</td>
 <td>${param.count}</td>
 </tr>
 </table>
 </div>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=utf-8"
     pageEncoding="utf-8"%>
     <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="utf-8">
 <title></title>
 </head>
 <body>
 <div align="center">
 <h1>选课结果浏览：</h1>

 <form action="TeacherServlet?method=searchclass" method="post" onsubmit="return check()">
 <table>
 <tr>
 <td>课程名称</td>
 <td>已选课人数</td>
 <td>课程总人数</td>

 </tr>
 <c:forEach items="${list}" var="item">
 <tr>
  <td><a href="showclassinfo.jsp?name=${item.name}&teacher=${item.teacher}&pid=${item.pid}&number=${item.number}&count=${item.count}">${item.name}</a></td>
  <td><a href="TeacherServlet?method=checkstudent&id=${item.pid}">${item.count}</a></td>
  <td>${item.number}</td>

 </tr>
 </c:forEach>
 </table>
 </form>
 </div>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
     <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 </head>
 <body>
 <div align="center">
 <h1>学生信息浏览</h1>
 <form action="TeacherServlet?method=checkstudent" method="post" >
 <table border="1">
 <tr>
 <td>学生姓名</td>
 <td>学生专业</td>
 </tr>

 <c:forEach items="${list}" var="item">
 <tr>
 <td><a href="showstudentinfos.jsp?id=${item.id}&name=${item.name}&sex=${item.sex}&classes=${item.classes}&zhuanye=${item.zhuanye}">${item.name}</a></td>
 <td>${item.zhuanye}</td>
 </tr>
 </c:forEach>

 </table>
 </form>
 </div>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 </head>
 <body>
 <div align="center">

 <h1>学生详细信息</h1>
 <table border="1">
 <tr>
 <td>学生学号</td>
 <td>学生姓名</td>
 <td>学生性别</td>
 <td>学生班级</td>
 <td>学生专业</td>
 </tr>
 <tr>
 <td>${param.id}</td>
 <td>${param.name}</td>
 <td>${param.sex}</td>
 <td>${param.classes}</td>
 <td>${param.zhuanye}</td>
 </tr>
 </table>
 </div>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
     <%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title></title>
 </head>
 <body>
 <div align="center">
 <h1>教师信息浏览</h1>
 <form action="TeacherServlet?method=seacrch" method="post" >
 <table border="1">
 <tr>
 <td>教师工号</td>
 <td>教师姓名</td>
 <td>教师性别</td>
 <td>所在院系</td>
 <td>教师职称</td>
 </tr>

 <c:forEach items="${list}" var="item">
 <tr>
 <td>${item.id}</td>
 <td>${item.name}</td>
 <td>${item.sex}</td>
 <td>${item.xueyuan}</td>
 <td>${item.zhicheng}</td>
 </tr>
 </c:forEach>

 </table>
 </form>
 </div>

 </body>
 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>课程信息管理系统：学生界面</title>

 <style type="text/css">

 .headframe{
     width:100%;
     height:130px;
     border:0;
 }

 .leftframe{
     float:left;
     width:250px;
     height:600px;
     border:0;
 }

 .mainframe{
     float:right;
     width:1200px;
     height:600px;
     border:0;
 }

 </style>

 <script type="text/javascript">

 </script>

 </head>
 <body onload="onload()">
 </body>

 <iframe src="head.jsp" class="headframe" scrolling="no"></iframe>
 <iframe src="left1.jsp" class="leftframe" scrolling="no"></iframe>
 <iframe src="main.jsp" name="mainAction" class="mainframe"></iframe>

 </html>

 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>课程信息管理系统：教师界面</title>

 <style type="text/css">

 .headframe{
     width:100%;
     height:130px;
     border:0;
 }

 .leftframe{
     float:left;
     width:250px;
     height:600px;
     border:0;
 }

 .mainframe{
     float:right;
     width:1200px;
     height:600px;
     border:0;
 }

 </style>

 </head>

 <iframe src="head.jsp" class="headframe" scrolling="no"></iframe>
 <iframe src="left2.jsp" class="leftframe" scrolling="no"></iframe>
 <iframe src="main.jsp" name="mainAction" class="mainframe"></iframe>

 </html>

 <%@page import="com.Dao.*"%>
 <%@page import="com.Bean.*"%>
 <%@page import="org.apache.jasper.tagplugins.jstl.core.ForEach"%>
 <%@page import="java.util.ArrayList"%>
 <%@page import="java.util.List" %>
 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>修改学生信息</title>

 <style type="text/css">

 /* .butn{ */
 /*     display:inline-block; */
 /*     padding: 8px 35px; */
 /*     background-color:#32CD32; */
 /*      color:white; */
 /*      border:none; */
 /*      text-align:center; */
 /*     text-decoration:none; */
 /*     border-radius:5px;     */
 /*     position:absolute; */
 /*      left:40px; */
 /*      top:95px; */
 /* } */

 </style>

 </head>
 <script type="text/javascript">
 function onload()
 {
     <%
     Cookie[] cookies=request.getCookies();
     String value="";
     ArrayList<student> list=new ArrayList<>();
     if(cookies!=null){
         System.out.println("cookie的长度为:"+cookies.length);
         for(int i=0;i<cookies.length;i++)
         {

             if(cookies[i].getName().equals("student"))
             {
                 value=cookies[i].getValue();
                 System.out.println(value+":");
                 list=Dao.getstudent(value);
             }
         }
     }
     %>
 }
 </script>
 <body onload="onload()">

 <div class="container">
     <section>
         <form action="StudentServlet?method=update" method="post" onsubmit="return check()">
             <%for(student s:list)
             {

             %>

             <span class="cname" style="background-color: red">学号</span>
             <input type="text" name="id" class="icname" placeholder="  class-name" id="id" readonly="readonly" value=<%=s.getId()%> >
             <br/>

             <span class="teacher">姓名</span>
             <input type="text" name="name" class="iteacher" placeholder="  teacher" id="name" value=<%=s.getName()%> >
             <br/>

             <span class="place">性别</span>
             <label><input type="radio" name="sex" id="sex" value="男">男</label>
                <label><input type="radio" name="sex" id="sex" value="女">女</label>
             <br/>

             <span class="place">班级</span>
             <input type="text" name="classes" class="iteacher" placeholder=" classes" id="classes" value=<%=s.getClasses() %>>
             <br/>

             <span class="place">专业</span>
             <input type="text" name="zhuanye" class="iteacher" placeholder="  zhuangye" id="zhuanye" value=<%=s.getZhuanye() %>>
             <br/>
             <% } %>
             <input type="submit" value="保存" class="butn">
             <br/>
         </form>
     </section>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

 <%@page import="com.Dao.*"%>
 <%@page import="com.Bean.*"%>
 <%@page import="org.apache.jasper.tagplugins.jstl.core.ForEach"%>
 <%@page import="java.util.ArrayList"%>
 <%@page import="java.util.List" %>
 <%@ page language="java" contentType="text/html; charset=UTF-8"
     pageEncoding="UTF-8"%>
 <!DOCTYPE html>
 <html>
 <head>
 <meta charset="UTF-8">
 <title>修改教师信息</title>

 <style type="text/css">

 /* .butn{ */
 /*     display:inline-block; */
 /*     padding: 8px 35px; */
 /*     background-color:#32CD32; */
 /*      color:white; */
 /*      border:none; */
 /*      text-align:center; */
 /*     text-decoration:none; */
 /*     border-radius:5px;     */
 /*     position:absolute; */
 /*      left:40px; */
 /*      top:95px; */
 /* } */

 </style>
 <script type="text/javascript">
 function onload()
 {
     <%
     Cookie[] cookies=request.getCookies();
     String value="";
     ArrayList<teacher> list=new ArrayList<>();
     if(cookies!=null){
         System.out.println("cookie的长度为:"+cookies.length);
         for(int i=0;i<cookies.length;i++)
         {

             if(cookies[i].getName().equals("teacher"))
             {
                 value=cookies[i].getValue();
                 System.out.println(value+":");
                 list=Dao.getteacher(value);
             }
         }
     }
     %>
 }
 </script>

 </head>
 <body>

 <div class="container">
     <section>
         <form action="TeacherServlet?method=update" method="post" onsubmit="return check()">
             <%for(teacher s:list)
             {

             %>
             <span class="cname">工号</span>
             <input type="text" name="id" class="icname" placeholder="  class-name" id="id" readonly="readonly" value=<%=s.getId()%>>
             <br/>

             <span class="teacher">姓名</span>
             <input type="text" name="name" class="iteacher" placeholder="  teacher" id="name" value=<%=s.getName()%>>
             <br/>

             <span class="place">性别</span>
             <label><input type="radio" name="sex" id="sex" value="男">男</label>
                <label><input type="radio" name="sex" id="sex" value="女">女</label>
             <br/>

             <span class="place">学院</span>
             <input type="text" name="xueyuan" class="iteacher" placeholder="  teacher" id="xueyuan" value=<%=s.getXueyuan()%>>
             <br/>

             <span class="place">职称</span>
             <input type="text" name="zhicheng" class="iteacher" placeholder="  teacher" id="zhicheng" value=<%=s.getZhicheng()%>>
             <br/>
             <% } %>
             <input type="submit" value="保存" class="butn">
             <br/>
         </form>
     </section>
 </div>

 <script type="text/javascript">

 </script>

 </body>
 </html>

登陆界面：

操作界面：

学生：

老师：

管理员：