目录
一.数据库
1.数据库和表的创建
2.数据插入
二.代码实现
1.pojo类
（1）Course
（2）User
（3）Elective
2.mapper接口
（1）UserMapper
（2）ElectiveMapper
（3）CourseMapper
3.sevlet
（1）LoginServlet：登录处理
（2）IndexServlet：用户主页面处理
（3）ChooseServlet：对选课请求的处理
（4）ViewCourseServlet：选课结果相关数据处理
（5）addCourseServlet：处理添加课程的请求
4.utils工具类
（1）SqlSessionUtil
5.resource
（1）mybatis-config.xml
（2）CourseMapper.xml
（3） jdbc.propetise
（4）log4j.propertise
6.jsp页面
（1）login.jsp:登录页面
（2）chooseList.jsp:学生选课页面、教师浏览学生选课情况
（3）viewCourse.jsp :选课结果一览
（4）addCourse.jsp
（5）error.jsp
三.实施结果
1.学生：
2.老师：
四.系统测试
一.数据库
根据实训题目中给出的表间关系图、数据表结构设计、数据说明等等信息，可创建数据库如下：
1.数据库和表的创建
CREATE DATABASE xuanke;
-- 创建用户表
CREATE TABLE USER (username VARCHAR(20) PRIMARY KEY NOT NULL,PASSWORD VARCHAR(20) NOT NULL,realname VARCHAR(20) NOT NULL,ROLE CHAR(1) NOT NULL CHECK (ROLE IN ('0', '1'))
);-- 创建课程表
CREATE TABLE course (course_id CHAR(6) PRIMARY KEY NOT NULL,course_name VARCHAR(40) NOT NULL,teacher VARCHAR(40) NOT NULL,`point` INT NOT NULL,time_1 CHAR(2) NOT NULL CHECK (time_1 BETWEEN '11' AND '55'),time_2 CHAR(2) NOT NULL CHECK (time_2 BETWEEN '11' AND '55'),location VARCHAR(40) NOT NULL,limited INT NOT NULL CHECK (limited >= 0)
);-- 创建选课表
CREATE TABLE elective (username VARCHAR(20) NOT NULL,course_id CHAR(6) NOT NULL,PRIMARY KEY (username, course_id),FOREIGN KEY (username) REFERENCES USER(username),FOREIGN KEY (course_id) REFERENCES course(course_id)
);
2.数据插入
-- 插入数据到用户表（USER）：
INSERT INTO USER (username, PASSWORD, realname, ROLE)
VALUES ('user1', 'password1', '张三', '1');INSERT INTO USER (username, PASSWORD, realname, ROLE)
VALUES ('user2', 'password2', '李四', '0');INSERT INTO USER (username, PASSWORD, realname, ROLE)
VALUES ('user3', 'password3', '王五', '0');-- 插入数据到课程表（course）
INSERT INTO course (course_id, course_name, teacher, POINT, time_1, time_2, location, limited)
VALUES ('C001', '数学', '张老师', 3, '12', '14', '教室A', 50);INSERT INTO course (course_id, course_name, teacher, POINT, time_1, time_2, location, limited)
VALUES ('C002', '英语', '李老师', 2, '11', '13', '教室B', 40);INSERT INTO course (course_id, course_name, teacher, POINT, time_1, time_2, location, limited)
VALUES ('C003', '物理', '王老师', 3, '15', '17', '教室C', 60);-- 插入数据到选课表（elective）：
INSERT INTO elective (username, course_id)
VALUES ('user1', 'C001');INSERT INTO elective (username, course_id)
VALUES ('user1', 'C002');INSERT INTO elective (username, course_id)
VALUES ('user2', 'C001');
二.代码实现
1.pojo类
（1）Course
此处使用parseTime方法实现题目要求中的数据说明与用户页面的time的转换
package com.hjj.pojo;import lombok.Data;/*** @author:嘉佳 Date:2023/11/27 23:30**/
@Data
public class Course {private String courseId;private String courseName;private String teacher;private int point;private String time1;private String time2;private String location;private int limited;private int choose;public void setTime1(String time1) {this.time1 = parseTime(time1);}public void setTime2(String time2) {this.time2 = parseTime(time2);}public String parseTime(String unTime) {int x = Integer.parseInt(unTime);String time = "星期";switch (x / 10) {case 1:time += "一";break;case 2:time += "二";break;case 3:time += "三";break;case 4:time += "四";break;case 5:time += "五";break;}switch (x % 10) {case 1:time += "8:05~9:50";break;case 2:time += "10:15~12:00";break;case 3:time += "13:35~15:20";break;case 4:time += "15:45~17:30";break;case 5:time += "18:30~20:45";break;}return time;}
}（2）User
package com.hjj.pojo;import lombok.Data;/*** @author:嘉佳 Date:2023/11/27 23:29**/
@Data
public class User {private String username;private String password;private String realName;private char role;
}
（3）Elective
package com.hjj.pojo;import lombok.Data;/*** @author:嘉佳 Date:2023/11/27 23:30**/
@Data
public class Elective {private String username;private String courseId;
}
2.mapper接口
mapper接口中方法名要与映射文件中的sql的id保持一致
使用 MyBatis 框架的注解方式执行 SQL
（1）UserMapper
package com.hjj.mapper;
import com.hjj.pojo.User;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Mapper;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;/*** @author:嘉佳 Date:2023/12/1 17:40**/
@Mapper
public interface UserMapper {@Select("select * from user where username = #{username} and password = #{password} and role = #{role}")User selectAdminByNameAndPassword(@Param("username") String username, @Param("password") String password, @Param("role") Integer role);@Insert("insert into user(username,password,realname,role) values(#{username},#{password},#{realname},#{role})")void insertUser(@Param("username") String username,@Param("password") String password,@Param("realname") String realName,@Param("role") Integer role);
}
（2）ElectiveMapper
package com.hjj.mapper;import com.hjj.pojo.Course;
import com.hjj.pojo.Elective;
import org.apache.ibatis.annotations.Delete;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;import java.util.List;/*** @author:嘉佳 Date:2023/12/3 23:54**/
public interface ElectiveMapper {@Select("SELECT COUNT(*) FROM elective \n" +"WHERE username=#{username} AND course_id=#{course_id}")Integer selectCourse(@Param("username") String username, @Param("course_id") String courseId);@Select("SELECT * FROM elective e LEFT JOIN course c ON c.course_id = e.course_id \n" +"WHERE e.username = #{username}")List<Course> selectElective(@Param("username") String username);@Insert("insert into elective(username,course_id) values(#{username},#{course_id})")void insertElect(@Param("username") String username, @Param("course_id") String courseId);}
（3）CourseMapper
package com.hjj.mapper;import com.hjj.pojo.Course;
import org.apache.ibatis.annotations.Insert;
import org.apache.ibatis.annotations.Param;
import org.apache.ibatis.annotations.Select;import java.time.LocalDateTime;
import java.util.List;/*** @author:嘉佳 Date:2023/12/1 23:54**/
public interface CourseMapper {@Select("select * from course")List<Course> selectAll();@Select("SELECT * FROM course c LEFT JOIN `user` u ON c.teacher = u.realname WHERE username = #{teacher}")List<Course> selectByTeacher(@Param("teacher")String teacher);@Select("SELECT COUNT(e.username) AS selected_count FROM course c\n" +"LEFT JOIN elective e ON c.course_id = e.course_id\n" +"WHERE c.course_id = #{courseId} GROUP BY c.course_id, c.course_name;\n")int countChoose(@Param(("courseId"))String courseId);@Select("select * from course where teacher = #{teacher}")List<Course> selectCourseByName(@Param("teacher") String teacher);@Insert("insert into course(course_id,course_name,teacher,POINT,time_1,time_2,location,limited) " +"values (#{courseId},#{name},#{teacher},#{point},#{time_1},#{time_2},#{location},#{limited})")void insertCourse(@Param("courseId") String courseId, @Param("name") String name, @Param("teacher") String teacher, @Param("point") Integer point, @Param("time_1") String time_1, @Param("time_2")String time_2, @Param("location")String location, @Param("limited")Integer limited);}
3.sevlet
（1）LoginServlet：登录处理
功能:验证用户的输入是否正确，验证输入信息的完整性，然后使用 Mybatis 进行数据库查询操作，如果查询结果不为空则表示登录成功并跳转到主页面，在验证角色时角色编码设置为 0、1。
package com.hjj.servlet;/*** @author:嘉佳 Date:2023/11/27 12:40**///import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;import com.hjj.mapper.UserMapper;
import com.hjj.pojo.User;
import com.hjj.utils.SqlSessionUtil;
import org.apache.ibatis.session.SqlSession;
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 java.io.IOException;@WebServlet("/login01")
public class LoginServlet extends HttpServlet {@Overrideprotected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {request.setCharacterEncoding("UTF-8");response.setContentType("text/html;charset=UTF-8");response.setCharacterEncoding("UTF-8");// 从表单获取输入的用户名和密码String username = request.getParameter("username");String password = request.getParameter("password");String role = request.getParameter("role");request.getSession().setAttribute("username", username);request.getSession().setAttribute("roleType", role);int roleCode = 0;if (role.equals("teacher")) {roleCode = 1;}// 验证用户名和密码是否为空if (username == null || username.isEmpty() || password == null || password.isEmpty()) {request.getRequestDispatcher("xuanke/error.jsp").forward(request, response);}SqlSession sqlSession = SqlSessionUtil.getSqlSession();UserMapper mapper = sqlSession.getMapper(UserMapper.class);User user = mapper.selectAdminByNameAndPassword(username, password, roleCode);if (user == null) {request.getRequestDispatcher("xuanke/error.jsp").forward(request, response);} else {request.getRequestDispatcher("indexServlet").forward(request, response);}}
}（2）IndexServlet：用户主页面处理
针对不同用户设置相关信息，这样不用单独写多个servlet处理多个不同类型用户
功能：获取当前用户的角色类型，并根据用户的角色类型使用 Mybatis 进行不同的数据库查询操作，从而获取课程列表信息。
package com.hjj.servlet;import com.hjj.mapper.CourseMapper;
import com.hjj.pojo.Course;
import com.hjj.utils.SqlSessionUtil;
import org.apache.ibatis.session.SqlSession;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 javax.servlet.http.HttpSession;
import java.io.IOException;
import java.util.List;/*** @author:嘉佳 Date:2023/12/4 0:02**/
@WebServlet("/indexServlet")
public class IndexServlet extends HttpServlet {@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {req.setCharacterEncoding("UTF-8");resp.setContentType("text/html;charset=UTF-8");resp.setCharacterEncoding("UTF-8");SqlSession sqlSession = SqlSessionUtil.getSqlSession();CourseMapper mapper = sqlSession.getMapper(CourseMapper.class);HttpSession session = req.getSession();List<Course> courseList=null;String roleType = session.getAttribute("roleType").toString();if(roleType.equals("student")){courseList = mapper.selectAll();}else{courseList=mapper.selectByTeacher((String) session.getAttribute("username"));}for (int i = 0; i < courseList.size(); i++) {int countChoose = mapper.countChoose(courseList.get(i).getCourseId());courseList.get(i).setChoose(countChoose);}req.setAttribute("lists", courseList);System.out.println("o");req.getRequestDispatcher("xuanke/chooseList.jsp").forward(req, resp);}@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {doPost(req,resp);}
}
（3）ChooseServlet：对选课请求的处理
功能：检验课程是否已选并将数据添加至数据库
package com.hjj.servlet;import com.hjj.mapper.CourseMapper;
import com.hjj.mapper.ElectiveMapper;
import com.hjj.pojo.Course;
import com.hjj.utils.SqlSessionUtil;
import org.apache.ibatis.session.SqlSession;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 java.io.IOException;
import java.util.List;/*** @author:嘉佳 Date:2023/12/4 15:49**/
@WebServlet("/chooseServlet")
public class ChooseServlet extends HttpServlet {@Overrideprotected void doPost(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {req.setCharacterEncoding("UTF-8");resp.setContentType("text/html;charset=UTF-8");resp.setCharacterEncoding("UTF-8");String courseId = req.getParameter("courseId");String username = req.getParameter("username");SqlSession sqlSession = SqlSessionUtil.getSqlSession();ElectiveMapper mapper = sqlSession.getMapper(ElectiveMapper.class);Integer course = mapper.selectCourse(username, courseId);if (course > 0) {req.setAttribute("errorMessage", "请勿选择已选课程");} else {System.out.println(course);mapper.insertElect(username, courseId);sqlSession.commit();sqlSession.close();req.setAttribute("errorMessage", "选课成功");}req.getRequestDispatcher("/indexServlet").forward(req, resp);}
}
（4）ViewCourseServlet：选课结果相关数据处理
功能：查询本人已选课程，计算已选学分
package com.hjj.servlet;import com.hjj.mapper.ElectiveMapper;
import com.hjj.pojo.Course;
import com.hjj.pojo.Elective;
import com.hjj.utils.SqlSessionUtil;
import org.apache.ibatis.session.SqlSession;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 java.io.IOException;
import java.util.List;/*** @author:嘉佳 Date:2023/12/5 22:02**/
@WebServlet("/viewCourseServlet")
public class ViewCourseServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {req.setCharacterEncoding("UTF-8");resp.setContentType("text/html;charset=UTF-8");resp.setCharacterEncoding("UTF-8");String username = (String) req.getSession().getAttribute("username");System.out.println(username);SqlSession sqlSession = SqlSessionUtil.getSqlSession();ElectiveMapper mapper = sqlSession.getMapper(ElectiveMapper.class);List<Course> electives = mapper.selectElective(username);// 计算已选学分int points=0;for (Course elective:electives){points+=elective.getPoint();}req.setAttribute("totalPoint",points);req.setAttribute("lists",electives);req.getRequestDispatcher("xuanke/viewCourse.jsp").forward(req,resp);}
}
（5）addCourseServlet：处理添加课程的请求
功能：获取前端传递过来的课程信息，将用户输入的信息录入数据库
package com.hjj.servlet;import com.hjj.mapper.CourseMapper;
import com.hjj.pojo.Course;
import com.hjj.utils.SqlSessionUtil;
import org.apache.ibatis.session.SqlSession;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 java.io.IOException;
import java.util.List;/*** @author:嘉佳 Date:2023/11/28 12:24**/
@WebServlet("/addCourseServlet")
public class addCourseServlet extends HttpServlet {@Overrideprotected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {req.setCharacterEncoding("UTF-8");resp.setContentType("text/html;charset=UTF-8");resp.setCharacterEncoding("UTF-8");String courseId = req.getParameter("courseId");System.out.println(courseId);String courseName = req.getParameter("courseName");String teacherName = req.getParameter("teacherName");String credits = req.getParameter("credits");String classLocation = req.getParameter("classLocation");String maxStudents = req.getParameter("maxStudents");String weekday1 = req.getParameter("weekday1");String time1 = req.getParameter("time1");String weekday2 = req.getParameter("weekday2");String time2 = req.getParameter("time2");System.out.println(weekday1+time1);String classTime1=weekday1+time1;String classTime2=weekday2+time2;SqlSession sqlSession = SqlSessionUtil.getSqlSession();CourseMapper mapper = sqlSession.getMapper(CourseMapper.class);mapper.insertCourse(courseId,courseName,teacherName,Integer.parseInt(credits),classTime1,classTime2,classLocation,Integer.parseInt(maxStudents));sqlSession.commit();sqlSession.close();req.setAttribute("errorMessage","添加成功");req.getRequestDispatcher("indexServlet").forward(req,resp);}@Overrideprotected void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {doGet(request, response);}}4.utils工具类
（1）SqlSessionUtil
功能：获取一个SqlSession对象，以便后续进行数据库操作。
package com.hjj.utils;import org.apache.ibatis.io.Resources;
import org.apache.ibatis.session.SqlSession;
import org.apache.ibatis.session.SqlSessionFactory;
import org.apache.ibatis.session.SqlSessionFactoryBuilder;import java.io.IOException;
import java.io.InputStream;/*** @author:嘉佳 Date:2023/3/22 15:52**/
public class SqlSessionUtil {public static SqlSession getSqlSession(){SqlSession sqlSession=null;try {
// 获取核心配置文件(读取配置信息)的输入流InputStream is = Resources.getResourceAsStream("mybatis-config.xml");
// 获取SqlSessionFactoryBuilder对象SqlSessionFactoryBuilder sqlSessionFactoryBuilder=new SqlSessionFactoryBuilder();
// 获取SqlSessionFactory对象(从文件或输入流中读取配置)SqlSessionFactory sqlSessionFactory = sqlSessionFactoryBuilder.build(is);
// 获取sql的会话对象SqlSession-》Mybatis提供的操作数据库的对象sqlSession=sqlSessionFactory.openSession(true);} catch (IOException e) {e.printStackTrace();}return sqlSession;}
}
5.resource
（1）mybatis-config.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE configurationPUBLIC "-//mybatis.org//DTD Config 3.0//EN""https://mybatis.org/dtd/mybatis-3-config.dtd">
<configuration><properties resource="jdbc.properties"/><settings><setting name="logImpl" value="LOG4J"/><!-- 开启自动驼峰命名规则映射 --><setting name="mapUnderscoreToCamelCase" value="true"/></settings><!--type：设置需要起别名的类型alias：设置某个类型的别名
--><typeAliases><package name="com.hjj.pojo"/></typeAliases><!--配置连接数据库的环境 --><environments default="development"><environment id="development"><transactionManager type="JDBC"/><dataSource type="POOLED"><property name="driver" value="${jdbc.driver}"/><property name="url" value="${jdbc.url}"/><property name="username" value="${jdbc.username}"/><property name="password" value="${jdbc.password}"/></dataSource></environment></environments><!-- 引入映射文件--><mappers><package name="com.hjj.mapper"/></mappers>
</configuration>（2）CourseMapper.xml
<?xml version="1.0" encoding="UTF-8" ?>
<!DOCTYPE mapperPUBLIC "-//mybatis.org//DTD Mapper 3.0//EN""https://mybatis.org/dtd/mybatis-3-mapper.dtd"><!--命名空间的作用:在 MyBatis 的配置中引用 Mapper 接口或 XML 文件，以实现数据库操作的映射-->
<mapper namespace="com.hjj.mapper.CourseMapper"></mapper>其他两个只是改了
<mapper namespace="com.hjj.mapper.XXMapper">
（3） jdbc.propetise
数据库连接的相关配置信息
jdbc.driver=com.mysql.cj.jdbc.Driver
jdbc.url=按自己
jdbc.username=按自己
jdbc.password=按自己（4）log4j.propertise
log4j.rootLogger=DEBUG,console,filelog4j.appender.console = org.apache.log4j.ConsoleAppender
log4j.appender.console.Target = System.out
log4j.appender.console.Threshold=DEBUG
log4j.appender.console.layout = org.apache.log4j.PatternLayout
log4j.appender.console.layout.ConversionPattern=[%c]-%m%nlog4j.appender.file = org.apache.log4j.RollingFileAppenderlog4j.appender.file.File=./log/mybatis.log
log4j.appender.file.MaxFileSize=10mb
log4j.appender.file.Threshold=DEBUG
log4j.appender.file.layout=org.apache.log4j.PatternLayout
log4j.appender.file.layout.ConversionPattern=[%p][%d{yy-MM-dd}][%c]%m%nlog4j.logger.org.mybatis=DEBUG
log4j.logger.java.sql=DEBUG
log4j.logger.java.sql.Statement=DEBUG
log4j.logger.java.sql.ResultSet=DEBUG
log4j.logger.java.sql.PreparedStatement=DEBUG
6.jsp页面
（1）login.jsp:登录页面
<%@ page language="java" contentType="text/html; charset=UTF-8"pageEncoding="UTF-8"%>
<!DOCTYPE html>
<html>
<head><meta charset="UTF-8"><title>Login</title><link rel="stylesheet" type="text/css" href="css/styles.css">
</head>
<body>
<h1>用户登录</h1><form action="${pageContext.request.contextPath}/login01" method="post"><label for="username">用户名:</label><input type="text" name="username" id="username"><br><br><label for="password">密码:</label><input type="password" name="password" id="password"><br><br><label for="role">角色:</label><select name="role" id="role" required><option value="teacher">Teacher</option><option value="student">Student</option></select><br><br><input type="submit" value="登录"><input type="reset" value="清除">
</form>
</body>
</html>（2）chooseList.jsp:学生选课页面、教师浏览学生选课情况
<%--Created by IntelliJ IDEA.User: ALASIJIADate: 2023/12/4Time: 0:12To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page isELIgnored="false" %>
<html>
<head><title>选择课程</title>
<%-- --%>
<%-- <%--%>
<%-- String path = request.getContextPath();--%>
<%-- String basePath = request.getScheme() + "://" + request.getServerName() + ":" + request.getServerPort() + path + "/css/choose.css";--%>
<%-- %>--%><link rel="stylesheet" href="xuanke/css/choose.css" />
<%-- <link rel="stylesheet" type="text/css" href="css/choose.css">--%>
</head>
<body>
<div><c:if test="${roleType=='student'}"><p>选课界面</p><p>你可以选择的课程列表如下(灰色按钮代表选课人数已满)</p><a href="${pageContext.request.contextPath}/viewCourseServlet">课程情况一览</a></c:if><c:if test="${roleType=='teacher'}"><p>选课情况</p><a href="${pageContext.request.contextPath}/xuanke/addCourse.jsp">添加新课程</a></c:if><a href="xuanke/login.jsp">退出登录</a>
</div>
<p style="color: red">${errorMessage }</p>
<div id="box"><table><thead><tr><th>课程编号</th><th>课程名称</th><th>授课老师</th><th>学分</th><th>上课时间</th><th>上课地点</th><th>限选人数</th><th>已选人数</th><c:if test="${roleType=='student'}"><th>操作</th></c:if></tr></thead><tbody><c:forEach items="${lists}" var="list"><tr><td>${list.courseId}</td><td>${list.courseName}</td><td>${list.teacher}</td><td>${list.point}</td><td>${list.time1}<br>${list.time2}</td><td>${list.location}</td><td>${list.limited}</td><td>${list.choose}</td><c:if test="${roleType=='student'}"><td><form action="${pageContext.request.contextPath}/chooseServlet" method="post"><input type="hidden" name="courseId" value="${list.courseId}"><input type="hidden" name="username" value="${sessionScope.username}"><input type="submit" value="选课" id="submit"></form></td></c:if></tr></c:forEach></tbody></table>
</div>
</body>
</html>
（3）viewCourse.jsp :选课结果一览
<%--Created by IntelliJ IDEA.User: ALASIJIADate: 2023/12/5Time: 21:17To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
<%@ page isELIgnored="false" %>
<html>
<head><title>选课结果</title><link rel="stylesheet" href="xuanke/css/choose.css" />
</head>
<body>
<div><p>选课结果一览</p><a href="${pageContext.request.contextPath}/indexServlet">继续选课</a><a href="${pageContext.request.contextPath}/xuanke/login.jsp">退出登录</a>
</div>
<p>您已选择的课程列表如下：</p>
<div id="box"><table><thead><tr><th>课程编号</th><th>课程名称</th><th>授课老师</th><th>学分</th><th>上课时间</th><th>上课地点</th><th>操作</th></tr></thead><tbody><c:forEach items="${lists}" var="list"><tr><td>${list.courseId}</td><td>${list.courseName}</td><td>${list.teacher}</td><td>${list.point}</td><td>${list.time1}<br>${list.time2}</td><td>${list.location}</td><td><form action="${pageContext.request.contextPath}/chooseServlet" method="post"><input type="hidden" name="courseId" value="${list.courseId}"><input type="hidden" name="username" value="${sessionScope.username}"><input type="submit" value="退课" id="submit"></form></td></tr></c:forEach></tbody></table><c:if test="${empty lists}"><p>无选课记录</p></c:if><c:if test="${not empty lists}"><p>您当前选课总学分为：${totalPoint}</p></c:if>
</div>
</body>
</html>
（4）addCourse.jsp
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
<%@ page isELIgnored="false" %>
<html>
<head><title>添加课程</title>
<%-- <link rel="stylesheet" href="xuanke/css/choose.css" />--%><link rel="stylesheet" href="css/addCourse.css" />
</head>
<body>
<div><p>添加课程</p><p>请输入新课程详细信息，并点击添加课程：</p><a href="${pageContext.request.contextPath}/indexServlet">课程情况一览</a><a href="${pageContext.request.contextPath}/xuanke/login.jsp">退出登录</a>
</div>
<form action="${pageContext.request.contextPath}/addCourseServlet" method="post"><label for="courseId">课程ID:</label><input type="text" id="courseId" name="courseId" required><br><!-- 课程名称 --><label for="courseName">课程名称:</label><input type="text" id="courseName" name="courseName" required><br><!-- 教师姓名 --><label for="teacherName">教师姓名:</label><input type="text" id="teacherName" name="teacherName" required><br><!-- 学分 --><label for="credits">学分:</label><input type="text" id="credits" name="credits" required><br><!-- 上课地点 --><label for="classLocation">上课地点:</label><input type="text" id="classLocation" name="classLocation" required><br><!-- 限制人数 --><label for="maxStudents">限制人数:</label><input type="number" id="maxStudents" name="maxStudents" required><br><!-- 上课时间第一次 -->
<%-- <label for="classTime1">上课时间（第一次）:</label>--%>
<%-- <input type="datetime-local" id="classTime1" name="classTime1" required><br>--%><span>上课时间（第一次）:</span><label for="weekday1">选择星期：</label><select name="weekday1" id="weekday1"><option value="1">星期一</option><option value="2">星期二</option><option value="3">星期三</option><option value="4">星期四</option><option value="5">星期五</option></select><label for="time1">选择上课时间段：</label><select name="time1" id="time1"><option value="1">8:05~9:50</option><option value="2">10:15~12:00</option><option value="3">13:35~15:20</option><option value="4">15:45~17:30</option><option value="5">18:30~20:45</option></select><br><br><!-- 上课时间第二次 --><span>上课时间（第二次）:</span><label for="weekday2">选择星期：</label><select name="weekday2" id="weekday2"><option value="1">星期一</option><option value="2">星期二</option><option value="3">星期三</option><option value="4">星期四</option><option value="5">星期五</option></select><label for="time2">选择上课时间段：</label><select name="time2" id="time2"><option value="1">8:05~9:50</option><option value="2">10:15~12:00</option><option value="3">13:35~15:20</option><option value="4">15:45~17:30</option><option value="5">18:30~20:45</option></select><br><br><!-- 提交按钮 --><input type="submit" value="添加课程">
</form>
</body>
</html>
（5）error.jsp
<%--Created by IntelliJ IDEA.User: ALASIJIADate: 2023/11/27Time: 13:20To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head><title>Title</title><script type="text/javascript">window.onload = function() {var confirmed = confirm("用户名或密码有误");if (confirmed) {window.location.href = "xuanke/login.jsp";}};</script>
</head>
<body></body>
</html>
三.实施结果
1.学生：
2. 老师：
登录页面与学生相同
四.系统测试
