studentupdate.java

这是学生管理网站的java源码,可以管理学生信息

package org.myservlets;

import java.io.IOException;
import java.io.PrintWriter;

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

import org.myJavabeans.DataConnection;
import org.myJavabeans.StudentBean;
import org.myJavabeans.TeacherBean;

public class studentUpdate 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 {

		doPost(request, response);
	}

	/**
	 * 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 {

		DataConnection d = new DataConnection();
		StudentBean student = new StudentBean();
		request.setCharacterEncoding("UTF-8");
		String key = request.getParameter("updatestudent");
		if (key.equals("添加")) {
			String stu_sex = null;
			String stu_school = null;
			String stu_id = request.getParameter("stu_id");
			String stu_name = request.getParameter("stu_name");
			if (d.isUseStudentid(stu_id)) {
				request.setAttribute("jsp", "studentUpdate.jsp");
				request.setAttribute("message", "id号不能重复使用");
				request.getRequestDispatcher("/error.jsp").forward(request,
						response);

			} else {

				String sex = request.getParameter("stu_sex");
				String stu_class = request.getParameter("stu_class");
				int school = Integer.parseInt(request
						.getParameter("stu_school"));
				String stu_phone = request.getParameter("stu_phone");
				String stu_text = request.getParameter("stu_text");
				String stu_address = request.getParameter("stu_address");
				if (sex.equals("man")) {
					stu_sex = "男";
				} else {
					stu_sex = "女";
				}
				switch (school) {
				case 1:
					stu_school = "高中";
					break;
				case 2:
					stu_school = "大专";
					break;
				case 3:
					stu_school = "本科";
					break;
				case 4:
					stu_school = "研究生";
					break;
				}
				boolean b = d
						.InsertStudent(stu_name, stu_id, stu_sex, stu_school,
								stu_class, stu_phone, stu_address, stu_text);
				if (b == true) {
					request.setAttribute("message", "添加成功");
					request.getRequestDispatcher("/teacher.jsp").forward(
							request, response);
				} else {
					request.setAttribute("message", "添加失败！");
					request.setAttribute("jsp", "studentUpdate.jsp");
					request.getRequestDispatcher("/error.jsp").forward(request,
							response);
				}
			}
		} else if (key.equals("删除")) {
			String stu_id = request.getParameter("stu_id");
			student = d.returnStudentAll(stu_id);
			if (student == null) {
				request.setAttribute("jsp", "studentUpdate.jsp");
				request.setAttribute("message", "没有找到此学生信息！");
				request.getRequestDispatcher("/error.jsp").forward(request,
						response);
			} else {
				boolean b = d.deleteStudent(stu_id);
				if (b == true) {
					request.setAttribute("message", "删除成功");
					request.getRequestDispatcher("/teacher.jsp").forward(
							request, response);
				} else {
					request.setAttribute("message", "删除失败");
					request.getRequestDispatcher("/teacher.jsp").forward(
							request, response);
				}
			}
		} else if (key.equals("修改")) {
			String stu_id = request.getParameter("stu_id");
			student = d.returnStudentAll(stu_id);
			if (student == null) {
				request.setAttribute("jsp", "studentUpdate.jsp");
				request.setAttribute("message", "没有找到此学生信息！");
				request.getRequestDispatcher("/error.jsp").forward(request,
						response);
			} else {
				request.setAttribute("student", student);
				request.getRequestDispatcher("/teacherUpdatestudent.jsp")
						.forward(request, response);
			}
		} else {
			request.setAttribute("jsp", "studentUpdate.jsp");
			request.setAttribute("message", "不成功");
			request.getRequestDispatcher("/error.jsp").forward(request,
					response);

		}

	}

}