studentservlet.java

学生考勤管理系统————分为课程选择

package com.ccniit.kaoqin.servlet;

import java.io.IOException;
import java.sql.SQLException;
import java.util.ArrayList;

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

import com.ccniit.kaoqin.db.classes.ClassesDAO;
import com.ccniit.kaoqin.db.student.Student;
import com.ccniit.kaoqin.db.student.StudentDAO;

@SuppressWarnings("serial")
public class StudentServlet extends HttpServlet {

	/**
	 * The doGet method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to get.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		String functionStr = request.getPathInfo();
		StudentDAO studentDAO = null;
		ClassesDAO classesDAO = null;
		try {
			if (functionStr.equals("/OpenStudent")) {
				String successPage = "/student/student.jsp";
				
				request.getRequestDispatcher(successPage).forward(request,
						response);

			} else if (functionStr.equals("/SelectClass")) {

				String successPage = "OpenAddStudent";
				String grade_name = request.getParameter("grade_name");
				classesDAO = new ClassesDAO();
				ArrayList classes = classesDAO.getClassesByGradeId(grade_name);
				request.setAttribute("grade_name", grade_name);
				request.setAttribute("classes", classes);
				request.getRequestDispatcher(successPage).forward(request,
						response);

			} 
			else if (functionStr.equals("/SelectC")) {
				String successPage = "OpenStudent";
				String grade_name = request.getParameter("grade_name");
				classesDAO = new ClassesDAO();
				ArrayList classes = classesDAO.getClassesByGradeId(grade_name);
				
				request.setAttribute("grade_name", grade_name);
				
				request.setAttribute("classes", classes);
				request.getRequestDispatcher(successPage).forward(request,
						response);
			} 
			else if (functionStr.equals("/ModifySelectClas")) {
				String successPage = "OpenModifyStudent";
				String grade_name = request.getParameter("grade_name");
				String class_idStr = request.getParameter("class_id");
				
				classesDAO = new ClassesDAO();
				ArrayList classes = classesDAO.getClassesByGradeId(grade_name);
				
				request.setAttribute("class_id", class_idStr);
				request.setAttribute("grade_name", grade_name);
				
				request.setAttribute("classes", classes);
				request.getRequestDispatcher(successPage).forward(request,
						response);
			} 
			else if (functionStr.equals("/List")) {
				String successPage = "SelectC";
				studentDAO = new StudentDAO();
				String class_idStr = request.getParameter("class_id");
				int class_id = Integer.parseInt(class_idStr);
				ArrayList students = studentDAO.getStudentByClassId(class_id);
				
				//String grade_name = request.getParameter("grade_name");
				//grade_name=new String(grade_name.getBytes("ISO-8859-1"),"gb2312");
				
				request.setAttribute("class_id", class_idStr);
				request.getSession().setAttribute("class_id", class_idStr);
				//request.setAttribute("grade_name", grade_name);
				request.setAttribute("students", students);
				// 获取转发器
				request.getRequestDispatcher(successPage).forward(request,
						response);
			} 
			else if (functionStr.equals("/OpenAddStudent")) {
				String successPage = "/student/addStudent.jsp";
				request.getRequestDispatcher(successPage).forward(request,
						response);
			} 
			else if (functionStr.equals("/AddStudent")) {
				String successPage = "/Info/Student/OpenAddStudent";
				String student_NO = request.getParameter("student_NO");
				String student_name = request.getParameter("student_name");
				String student_sex = request.getParameter("student_sex");
				String class_idStr = request.getParameter("class_id");
				int class_id = Integer.parseInt(class_idStr);
				String student_room = request.getParameter("student_room");
				String student_phone = request.getParameter("student_phone");
				String student_telPhone = request
						.getParameter("student_telPhone");
				String student_email = request.getParameter("student_email");
				studentDAO = new StudentDAO();
				Student student1=studentDAO.getStudentByNo(student_NO);
				
				if(student1==null){
					Student student = new Student();
					student.setStudent_NO(student_NO);
					student.setStudent_name(student_name);
					student.setStudent_sex(student_sex);
					student.setClass_id(class_id);
					student.setStudent_room(student_room);
					student.setStudent_phone(student_phone);
					student.setStudent_telPhone(student_telPhone);
					student.setStudent_email(student_email);
					student.setStudent_password("123456");
					student.setStudent_image("stuimages/error.gif");

				
					studentDAO.addStudent(student);

					request.setAttribute("message", "添加学生信息成功！");
				}else {
					request.setAttribute("message1", "学生号重复！");
				}
				
				 
				
				
				
				
				
				request.getRequestDispatcher(successPage).forward(request,
						response);
			} else if (functionStr.equals("/OpenModifyStudent")) {
				
				String successPage = "/student/modifyStudent.jsp";
				String student_idStr = request.getParameter("student_id");
				int student_id = Integer.parseInt(student_idStr);
				studentDAO = new StudentDAO();
				
				
                       
				Student student = studentDAO.getStudentById(student_id);
				
				classesDAO = new ClassesDAO();
				ArrayList classes = classesDAO.getAllClasses();
				 
				 System.out.println(student.getClass_id());
				 
				request.setAttribute("class_idStr", student.getClass_id()+"");
				
				request.setAttribute("classes", classes);
				request.setAttribute("student", student);
				request.getRequestDispatcher(successPage).forward(request,
						response);
			} else if (functionStr.equals("/ModifyStudent")) {
				String successPage = "/Info/Student/OpenModifyStudent";
				String student_idStr = request.getParameter("student_id");
				int student_id = Integer.parseInt(student_idStr);
				String student_NO = request.getParameter("student_NO");
				String student_name = request.getParameter("student_name");
				String student_sex = request.getParameter("student_sex");
				String class_idStr = request.getParameter("class_id");
				int class_id = Integer.parseInt(class_idStr);
				String student_room = request.getParameter("student_room");
				String student_phone = request.getParameter("student_phone");
				String student_telPhone = request
						.getParameter("student_telPhone");
				String student_email = request.getParameter("student_email");
				String student_password = request
						.getParameter("student_password");

				Student student = new Student();
				student.setStudent_NO(student_NO);
				student.setStudent_name(student_name);
				student.setStudent_sex(student_sex);
				student.setClass_id(class_id);
				student.setStudent_room(student_room);
				student.setStudent_phone(student_phone);
				student.setStudent_telPhone(student_telPhone);
				student.setStudent_email(student_email);
				student.setStudent_password(student_password);
				student.setStudent_id(student_id);
                 
				studentDAO = new StudentDAO();
				studentDAO.modifyStudent(student);

				request.setAttribute("message", "修改学生信息成功！");
				request.getRequestDispatcher(successPage).forward(request,
						response);

			} else if (functionStr.equals("/OpenStudentDetail")) {
				
				
				String successPage = "/student/studentDetail.jsp";
				String student_idStr = request.getParameter("student_id");
				int student_id = Integer.parseInt(student_idStr);
				studentDAO = new StudentDAO();
				Student student = studentDAO.getStudentDeatilById(student_id);
				
				request.setAttribute("student", student);
				request.getRequestDispatcher(successPage).forward(request,
						response);
				
				
			} else if (functionStr.equals("/DeleteStudent")) {
				
				
				
				
					studentDAO = new StudentDAO();
					String student_idStr = request.getParameter("student_id");
					int student_id = Integer.parseInt(student_idStr);
					//Student student=studentDAO.getStudentById(student_id);
					 
					String successPage ="List?class_id="+request.getSession().getAttribute("class_id");
					
					studentDAO.deleteStudent(student_id);
					
					
					
			
				 
				request.getRequestDispatcher(successPage).forward(request,
						response);
			}
		} catch (NumberFormatException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		} catch (ClassNotFoundException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		} catch (SQLException e) {
			// TODO 自动生成 catch 块
			e.printStackTrace();
		} finally {
			try {
				if (studentDAO != null) {
					studentDAO.release();
				}
			} catch (SQLException e) {
				// TODO 自动生成 catch 块
				e.printStackTrace();
			}
		}

	}

	/**
	 * The doPost method of the servlet. <br>
	 * 
	 * This method is called when a form has its tag value method equals to
	 * post.
	 * 
	 * @param request
	 *            the request send by the client to the server
	 * @param response
	 *            the response send by the server to the client
	 * @throws ServletException
	 *             if an error occurred
	 * @throws IOException
	 *             if an error occurred
	 */
	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		// 设定字符为gb2312
		request.setCharacterEncoding("gb2312");
		this.doGet(request, response);

	}

}