jsp中 Java代码使用js属性作为参数

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mob6454cc7aec82 2024-09-13 10:13:09

文章标签 mysql java bootstrap 信息管理 文章分类 Java 后端开发

基于javaweb+mysql的jsp+servlet学生信息管理系统(java+servlet+jsp+easyui+mysql)

运行环境

Java≥8、MySQL≥5.7、Tomcat≥8

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

功能说明

基于javaweb+mysql的JSP+Servlet学生信息管理系统(java+servlet+jsp+easyui+mysql)

介绍

学生信息管理系统,该项目分为管理员、老师、学生三种角色；管理员主要功能：学生信息管理、班级信息管理、教师信息管理、系统管理；老师主要功能：学生信息管理、班级信息管理、教师信息管理、系统管理；学生主要功能：学生信息管理、系统管理；

环境需要

1.运行环境：最好是java jdk 1.8，我们在这个平台上运行的。其他版本理论上也可以。 2.IDE环境：IDEA，Eclipse,Myeclipse都可以。推荐IDEA; 3.tomcat环境：Tomcat 7.x,8.x,9.x版本均可 4.硬件环境：windows 7/8/10 1G内存以上；或者 Mac OS； 5.是否Maven项目: 否；查看源码目录中是否包含pom.xml；若包含，则为maven项目，否则为非maven项目 6.数据库：MySql 5.7版本；

技术栈

Servlet+Jsp+easyui

使用说明

使用IDEA/Eclipse/MyEclipse导入项目，Eclipse/MyEclipse导入时，若为maven项目请选择maven;若为maven项目，导入成功后请执行maven clean;maven install命令，配置tomcat，然后运行； 2. 使用Navicat或者其它工具，在mysql中创建对应名称的数据库，并导入项目的sql文件； 3. 将项目中DbUtil.java中的数据库配置改为自己的配置 4. 配置tomcat,运行项目，在浏览器中输入localhost:8080/xxx 登录 5.管理员账号：admin 密码：admin 教师账号：王鹤翔老师密码：111 学生账号：江小雷密码：1

case 2:{
				StudentDao studentDao = new StudentDao();
				Student student = studentDao.login(name, password);
				studentDao.closeCon();
				if(student == null){
					response.getWriter().write("loginError");
					return;
				}
				HttpSession session = request.getSession();
				session.setAttribute("user", student);
				session.setAttribute("userType", type);
				loginStatus = "loginSuccess";
				break;
			}
			case 3:{
				TeacherDao teahcerDao = new TeacherDao();
				Teacher teacher = teahcerDao.login(name, password);
				teahcerDao.closeCon();
				if(teacher == null){
					response.getWriter().write("loginError");
					return;
				}
				HttpSession session = request.getSession();
				session.setAttribute("user", teacher);
				session.setAttribute("userType", type);
				loginStatus = "loginSuccess";
				break;
			}
			default:
				break;
			}
		response.getWriter().write(loginStatus);
		
	}
	
	private void logout(HttpServletRequest request,HttpServletResponse response) throws IOException{
		request.getSession().removeAttribute("user");
		request.getSession().removeAttribute("userType");
		response.sendRedirect("index.jsp");
	}
}

e.printStackTrace();
			}
		}
		String ret = "success";
		if(!scoreDao.addScore(score)){
			ret = "error";
		}
		try {
			response.getWriter().write(ret);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

public class AttendanceServlet extends HttpServlet{
	/**
	 * 
	 */
	private static final long serialVersionUID = 1L;
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{
		doPost(request, response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{
		String method = request.getParameter("method");
		if("toAttendanceServletListView".equals(method)){

ret.put("rows", courseList);
		try {
			String from = request.getParameter("from");
			if("combox".equals(from)){
				response.getWriter().write(JSONArray.fromObject(courseList).toString());
			}else{
				response.getWriter().write(JSONObject.fromObject(ret).toString());
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void addScore(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		int studentId = request.getParameter("studentid") == null ? 0 : Integer.parseInt(request.getParameter("studentid").toString());
		int courseId = request.getParameter("courseid") == null ? 0 : Integer.parseInt(request.getParameter("courseid").toString());
		Double scoreNum = Double.parseDouble(request.getParameter("score"));
		String remark = request.getParameter("remark");
		Score score = new Score();
		score.setCourseId(courseId);
		score.setStudentId(studentId);
		score.setScore(scoreNum);
		score.setRemark(remark);
		ScoreDao scoreDao = new ScoreDao();
		if(scoreDao.isAdd(studentId, courseId)){
			try {
				response.getWriter().write("added");
				scoreDao.closeCon();
				return;
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}
		}
		String ret = "success";
		if(!scoreDao.addScore(score)){
			ret = "error";
		}
		try {
			response.getWriter().write(ret);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

String name = request.getParameter("name");
		int teacherId = request.getParameter("teacherid") == null ? 0 : Integer.parseInt(request.getParameter("teacherid").toString());
		Integer currentPage = request.getParameter("page") == null ? 1 : Integer.parseInt(request.getParameter("page"));
		Integer pageSize = request.getParameter("rows") == null ? 999 : Integer.parseInt(request.getParameter("rows"));
		Course course = new Course();
		course.setName(name);
		course.setTeacherId(teacherId);
		CourseDao courseDao = new CourseDao();
		List<Course> courseList = courseDao.getCourseList(course, new Page(currentPage, pageSize));
		int total = courseDao.getCourseListTotal(course);
		courseDao.closeCon();
		response.setCharacterEncoding("UTF-8");
		Map<String, Object> ret = new HashMap<String, Object>();
		ret.put("total", total);
		ret.put("rows", courseList);
		try {
			String from = request.getParameter("from");
			if("combox".equals(from)){
				response.getWriter().write(JSONArray.fromObject(courseList).toString());
			}else{
				response.getWriter().write(JSONObject.fromObject(ret).toString());
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void addCourse(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		String name = request.getParameter("name");
		int teacherId = Integer.parseInt(request.getParameter("teacherid").toString());
		int maxNum = Integer.parseInt(request.getParameter("maxnum").toString());
		String courseDate = request.getParameter("course_date");
		String info = request.getParameter("info");
		Course course = new Course();
		course.setName(name);
		course.setTeacherId(teacherId);
		course.setInfo(info);
		course.setMaxNum(maxNum);
		course.setCourseDate(courseDate);
		CourseDao courseDao = new CourseDao();

course.setInfo(info);
		course.setMaxNum(maxNum);
		course.setCourseDate(courseDate);
		CourseDao courseDao = new CourseDao();
		String msg = "error";
		if(courseDao.addCourse(course)){
			msg = "success";
		}
		try {
			response.getWriter().write(msg);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}finally{
			courseDao.closeCon();
		}
	}
	
}

/**
 * 
 *系统登录后主界面
 */
public class SystemServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = -7258264317769166483L;
	
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{
		doPost(request, response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{
		String method = request.getParameter("method");
		if("toPersonalView".equals(method)){
			personalView(request,response);

Admin admin = adminDao.login(name, password);
				adminDao.closeCon();
				if(admin == null){
					response.getWriter().write("loginError");
					return;
				}
				HttpSession session = request.getSession();
				session.setAttribute("user", admin);
				session.setAttribute("userType", type);
				loginStatus = "loginSuccess";
				break;
			}
			case 2:{
				StudentDao studentDao = new StudentDao();
				Student student = studentDao.login(name, password);
				studentDao.closeCon();
				if(student == null){
					response.getWriter().write("loginError");
					return;
				}
				HttpSession session = request.getSession();
				session.setAttribute("user", student);
				session.setAttribute("userType", type);
				loginStatus = "loginSuccess";
				break;
			}
			case 3:{
				TeacherDao teahcerDao = new TeacherDao();
				Teacher teacher = teahcerDao.login(name, password);
				teahcerDao.closeCon();
				if(teacher == null){
					response.getWriter().write("loginError");
					return;
				}
				HttpSession session = request.getSession();
				session.setAttribute("user", teacher);
				session.setAttribute("userType", type);
				loginStatus = "loginSuccess";
				break;
			}
			default:
				break;
			}
		response.getWriter().write(loginStatus);
		
	}
	
	private void logout(HttpServletRequest request,HttpServletResponse response) throws IOException{
		request.getSession().removeAttribute("user");
		request.getSession().removeAttribute("userType");
		response.sendRedirect("index.jsp");
	}

/**
 * 
 *班级信息管理servlet
 */
public class ClazzServlet extends HttpServlet {
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{
		doPost(request, response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{
		String method = request.getParameter("method");
		if("toClazzListView".equals(method)){
			clazzList(request,response);
		}else if("getClazzList".equals(method)){
			getClazzList(request, response);
		}else if("AddClazz".equals(method)){
			addClazz(request, response);
		}else if("DeleteClazz".equals(method)){
			deleteClazz(request, response);
		}else if("EditClazz".equals(method)){
			editClazz(request, response);
		}
	}
	private void editClazz(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		Integer id = Integer.parseInt(request.getParameter("id"));
		String name = request.getParameter("name"); 
		String info = request.getParameter("info");
		Clazz clazz = new Clazz();
		clazz.setName(name);
		clazz.setInfo(info);
		clazz.setId(id);
		ClazzDao clazzDao = new ClazzDao();
		if(clazzDao.editClazz(clazz)){
			try {
				response.getWriter().write("success");
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally{
				clazzDao.closeCon();
			}
		}
	}
	private void deleteClazz(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		Integer id = Integer.parseInt(request.getParameter("clazzid"));
		ClazzDao clazzDao = new ClazzDao();
		if(clazzDao.deleteClazz(id)){

/**
 * 
 *系统登录后主界面
 */
public class SystemServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = -7258264317769166483L;
	
	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{
		doPost(request, response);
	}
	public void doPost(HttpServletRequest request,HttpServletResponse response) throws IOException{
		String method = request.getParameter("method");
		if("toPersonalView".equals(method)){
			personalView(request,response);
			return;
		}else if("EditPasswod".equals(method)){
			editPassword(request,response);
			return;
		}
		try {
			request.getRequestDispatcher("view/system.jsp").forward(request, response);
		} catch (ServletException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void editPassword(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		String password = request.getParameter("password");
		String newPassword = request.getParameter("newpassword");
		response.setCharacterEncoding("UTF-8");
		int userType = Integer.parseInt(request.getSession().getAttribute("userType").toString());
		if(userType == 1){
			//管理员

}
				if(cell.getCellType() != cell.CELL_TYPE_NUMERIC){
					errorMsg += "第" + rowNum + "行课程id不是整数！\n";
					continue;
				}
				int courseId = new Double(cell.getNumericCellValue()).intValue();
				//获取第2列，成绩
				cell = row.getCell(2);
				if(cell == null){
					errorMsg += "第" + rowNum + "行成绩缺失！\n";
					continue;
				}
				if(cell.getCellType() != cell.CELL_TYPE_NUMERIC){
					errorMsg += "第" + rowNum + "行成绩类型不是数字！\n";
					continue;
				}
				double scoreValue = cell.getNumericCellValue();
				//获取第3列，备注
				cell = row.getCell(3);
				String remark = null;
				if(cell != null){
					remark = cell.getStringCellValue();
				}
				Student student = studentDao.getStudent(studentId);
				if(student == null){
					errorMsg += "第" + rowNum + "行学生id不存在！\n";
					continue;
				}
				Course course = courseDao.getCourse(courseId);
				if(course == null){
					errorMsg += "第" + rowNum + "行课程id不存在！\n";
					continue;
				}
				if(!selectedCourseDao.isSelected(studentId, courseId)){
					errorMsg += "第" + rowNum + "行课程该同学未选，不合法！\n";
					continue;
				}
				if(scoreDao.isAdd(studentId, courseId)){
					errorMsg += "第" + rowNum + "行成绩已经被添加，请勿重复添加！\n";
					continue;
				}
				Score score = new Score();
				score.setCourseId(courseId);
				score.setRemark(remark);
				score.setScore(scoreValue);
				score.setStudentId(studentId);
				if(scoreDao.addScore(score)){
					count++;
				}
			}
			errorMsg += "成功录入" + count + "条成绩信息！";

if(userType == 2){
			//如果是学生，只能查看自己的信息
			Student currentUser = (Student)request.getSession().getAttribute("user");
			studentId = currentUser.getId();
		}
		leave.setStudentId(studentId);
		LeaveDao leaveDao = new LeaveDao();
		List<Leave> leaveList = leaveDao.getLeaveList(leave, new Page(currentPage, pageSize));
		int total = leaveDao.getLeaveListTotal(leave);
		leaveDao.closeCon();
		response.setCharacterEncoding("UTF-8");
		Map<String, Object> ret = new HashMap<String, Object>();
		ret.put("total", total);
		ret.put("rows", leaveList);
		try {
			String from = request.getParameter("from");
			if("combox".equals(from)){
				response.getWriter().write(JSONArray.fromObject(leaveList).toString());
			}else{
				response.getWriter().write(JSONObject.fromObject(ret).toString());
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void addLeave(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		int studentId = Integer.parseInt(request.getParameter("studentid"));
		String info = request.getParameter("info");
		Leave leave = new Leave();
		leave.setStudentId(studentId);
		leave.setInfo(info);
		leave.setRemark("");
		LeaveDao leaveDao = new LeaveDao();
		String msg = "error";
		if(leaveDao.addLeave(leave)){
			msg = "success";
		}
		try {
			response.getWriter().write(msg);
		} catch (IOException e) {

msg = "error";
		}
		scoreDao.closeCon();
		try {
			response.getWriter().write(msg);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void editScore(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		int id = Integer.parseInt(request.getParameter("id"));
		int studentId = request.getParameter("studentid") == null ? 0 : Integer.parseInt(request.getParameter("studentid").toString());
		int courseId = request.getParameter("courseid") == null ? 0 : Integer.parseInt(request.getParameter("courseid").toString());
		Double scoreNum = Double.parseDouble(request.getParameter("score"));
		String remark = request.getParameter("remark");
		Score score = new Score();
		score.setId(id);
		score.setCourseId(courseId);
		score.setStudentId(studentId);
		score.setScore(scoreNum);
		score.setRemark(remark);
		ScoreDao scoreDao = new ScoreDao();
		String ret = "success";
		if(!scoreDao.editScore(score)){
			ret = "error";
		}
		try {
			response.getWriter().write(ret);
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void getScoreList(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		int studentId = request.getParameter("studentid") == null ? 0 : Integer.parseInt(request.getParameter("studentid").toString());
		int courseId = request.getParameter("courseid") == null ? 0 : Integer.parseInt(request.getParameter("courseid").toString());
		Integer currentPage = request.getParameter("page") == null ? 1 : Integer.parseInt(request.getParameter("page"));
		Integer pageSize = request.getParameter("rows") == null ? 999 : Integer.parseInt(request.getParameter("rows"));

int total = studentDao.getStudentListTotal(student);
		studentDao.closeCon();
		response.setCharacterEncoding("UTF-8");
		Map<String, Object> ret = new HashMap<String, Object>();
		ret.put("total", total);
		ret.put("rows", clazzList);
		try {
			String from = request.getParameter("from");
			if("combox".equals(from)){
				response.getWriter().write(JSONArray.fromObject(clazzList).toString());
			}else{
				response.getWriter().write(JSONObject.fromObject(ret).toString());
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void addStudent(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		String name = request.getParameter("name");
		String password = request.getParameter("password");
		String sex = request.getParameter("sex");
		String mobile = request.getParameter("mobile");
		String qq = request.getParameter("qq");
		int clazzId = Integer.parseInt(request.getParameter("clazzid"));
		Student student = new Student();
		student.setClazzId(clazzId);
		student.setMobile(mobile);
		student.setName(name);
		student.setPassword(password);
		student.setQq(qq);
		student.setSex(sex);
		student.setSn(SnGenerateUtil.generateSn(clazzId));
		StudentDao studentDao = new StudentDao();
		if(studentDao.addStudent(student)){
			try {
				response.getWriter().write("success");
			} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally{
				studentDao.closeCon();
			}
		}
	}

//验证码验证通过，对比用户名密码是否正确
		String loginStatus = "loginFaild";
		switch (type) {
			case 1:{
				AdminDao adminDao = new AdminDao();
				Admin admin = adminDao.login(name, password);
				adminDao.closeCon();
				if(admin == null){
					response.getWriter().write("loginError");
					return;
				}
				HttpSession session = request.getSession();
				session.setAttribute("user", admin);
				session.setAttribute("userType", type);
				loginStatus = "loginSuccess";
				break;
			}
			case 2:{
				StudentDao studentDao = new StudentDao();
				Student student = studentDao.login(name, password);
				studentDao.closeCon();
				if(student == null){
					response.getWriter().write("loginError");
					return;
				}
				HttpSession session = request.getSession();
				session.setAttribute("user", student);
				session.setAttribute("userType", type);
				loginStatus = "loginSuccess";
				break;
			}
			case 3:{
				TeacherDao teahcerDao = new TeacherDao();
				Teacher teacher = teahcerDao.login(name, password);
				teahcerDao.closeCon();
				if(teacher == null){
					response.getWriter().write("loginError");
					return;
				}
				HttpSession session = request.getSession();
				session.setAttribute("user", teacher);
				session.setAttribute("userType", type);
				loginStatus = "loginSuccess";
				break;
			}

//学生
			Student student = (Student)request.getSession().getAttribute("user");
			if(!student.getPassword().equals(password)){
				try {
					response.getWriter().write("原密码错误！");
					return;
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			StudentDao studentDao = new StudentDao();
			if(studentDao.editPassword(student, newPassword)){
				try {
					response.getWriter().write("success");
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
				finally{
					studentDao.closeCon();
				}
			}else{
				try {
					response.getWriter().write("数据库修改错误");
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}finally{
					studentDao.closeCon();
				}
			}
		}
		if(userType == 3){
			//教师
			Teacher teacher = (Teacher)request.getSession().getAttribute("user");
			if(!teacher.getPassword().equals(password)){
				try {
					response.getWriter().write("原密码错误！");
					return;
				} catch (IOException e) {
					// TODO Auto-generated catch block
					e.printStackTrace();
				}
			}
			TeacherDao teacherDao = new TeacherDao();
			if(teacherDao.editPassword(teacher, newPassword)){
				try {

String errorMsg = "";
			StudentDao studentDao = new StudentDao();
			CourseDao courseDao = new CourseDao();
			ScoreDao scoreDao = new ScoreDao();
			SelectedCourseDao selectedCourseDao = new SelectedCourseDao();
			for(int rowNum = 1; rowNum <= sheetAt.getLastRowNum(); rowNum++){
				HSSFRow row = sheetAt.getRow(rowNum);
				HSSFCell cell = row.getCell(0);
				//获取第0列，学生id
				if(cell == null){
					errorMsg += "第" + rowNum + "行学生id缺失！\n";
					continue;
				}
				if(cell.getCellType() != cell.CELL_TYPE_NUMERIC){
					errorMsg += "第" + rowNum + "行学生id类型不是整数！\n";
					continue;
				}
				int studentId = new Double(cell.getNumericCellValue()).intValue();
				//获取第1列，课程id
				cell = row.getCell(1);
				if(cell == null){
					errorMsg += "第" + rowNum + "行课程id缺失！\n";
					continue;
				}
				if(cell.getCellType() != cell.CELL_TYPE_NUMERIC){
					errorMsg += "第" + rowNum + "行课程id不是整数！\n";
					continue;
				}
				int courseId = new Double(cell.getNumericCellValue()).intValue();
				//获取第2列，成绩
				cell = row.getCell(2);
				if(cell == null){
					errorMsg += "第" + rowNum + "行成绩缺失！\n";
					continue;
				}
				if(cell.getCellType() != cell.CELL_TYPE_NUMERIC){
					errorMsg += "第" + rowNum + "行成绩类型不是数字！\n";
					continue;
				}
				double scoreValue = cell.getNumericCellValue();
				//获取第3列，备注

Integer pageSize = request.getParameter("rows") == null ? 999 : Integer.parseInt(request.getParameter("rows"));
		Integer clazz = request.getParameter("clazzid") == null ? 0 : Integer.parseInt(request.getParameter("clazzid"));
		//获取当前登录用户类型
		int userType = Integer.parseInt(request.getSession().getAttribute("userType").toString());
		Teacher teacher = new Teacher();
		teacher.setName(name);
		teacher.setClazzId(clazz);
		if(userType == 3){
			//如果是学生，只能查看自己的信息
			Teacher currentUser = (Teacher)request.getSession().getAttribute("user");
			teacher.setId(currentUser.getId());
		}
		TeacherDao teacherDao = new TeacherDao();
		List<Teacher> teacherList = teacherDao.getTeacherList(teacher, new Page(currentPage, pageSize));
		int total = teacherDao.getTeacherListTotal(teacher);
		teacherDao.closeCon();
		response.setCharacterEncoding("UTF-8");
		Map<String, Object> ret = new HashMap<String, Object>();
		ret.put("total", total);
		ret.put("rows", teacherList);
		try {
			String from = request.getParameter("from");
			if("combox".equals(from)){
				response.getWriter().write(JSONArray.fromObject(teacherList).toString());
			}else{
				response.getWriter().write(JSONObject.fromObject(ret).toString());
			}
		} catch (IOException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
	private void addTeacher(HttpServletRequest request,
			HttpServletResponse response) {
		// TODO Auto-generated method stub
		String name = request.getParameter("name");
		String password = request.getParameter("password");
		String sex = request.getParameter("sex");
		String mobile = request.getParameter("mobile");
		String qq = request.getParameter("qq");
		int clazzId = Integer.parseInt(request.getParameter("clazzid"));
		Teacher teacher = new Teacher();
		teacher.setClazzId(clazzId);

} catch (IOException e) {
				// TODO Auto-generated catch block
				e.printStackTrace();
			}finally{
				studentDao.closeCon();
			}
		}
	}
	private void studentList(HttpServletRequest request,
			HttpServletResponse response) throws IOException {
		// TODO Auto-generated method stub
		try {
			request.getRequestDispatcher("view/studentList.jsp").forward(request, response);
		} catch (ServletException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
		}
	}
}

public class SelectedCourseServlet extends HttpServlet {

	/**
	 * 
	 */
	private static final long serialVersionUID = 7120913402001186955L;

	public void doGet(HttpServletRequest request,HttpServletResponse response) throws IOException{

jsp中 Java代码使用js属性作为参数_bootstrap