完整简洁的jsp+servlet+jstl实例

package jsp.cotroller; import java.io.IOException; import java.util.ArrayList; import javax.servlet.RequestDispatcher; import javax.servlet.ServletException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; import jsp.impl.Studentimpl; import jsp.model.Student; public class StudentSer extends HttpServlet { Studentimpl studentimpl = new Studentimpl(); /** * Constructor of the object. */ public StudentSer() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * 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 { this.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 { request.setCharacterEncoding("UTF-8"); String status = request.getParameter("status"); if(status.equals("saveStudent")){ Student student = new Student(); String name = request.getParameter("sname"); String address = request.getParameter("saddress"); String[] hobby = request.getParameterValues("shobby"); String str = studentimpl.subString(hobby); student.setName(name); student.setAddress(address); student.setHobby(str); studentimpl.savaStudent(student); }else if(status.equals("queryStudent")){ String sname = request.getParameter("sname"); request.getSession().setAttribute("sname", sname); ArrayList<Student> students = studentimpl.queryStudent(sname); request.setAttribute("studentparam", students); RequestDispatcher dispatcher = request.getRequestDispatcher("/queryStudent.jsp"); dispatcher.forward(request, response); }else if(status.equals("deleteStudent")){ int sid = Integer.parseInt(request.getParameter("sid")); studentimpl.deleteStudent(sid); String sname = request.getSession().getAttribute("sname").toString(); ArrayList<Student> students = studentimpl.queryStudent(sname); request.setAttribute("studentparam", students); RequestDispatcher dispatcher = request.getRequestDispatcher("/queryStudent.jsp"); dispatcher.forward(request, response); //RequestDispatcher dispatcher = request.getRequestDispatcher("/queryStudent.jsp"); //dispatcher.forward(request, response); }else if(status.equals("updateStudent")){ Student student = new Student(); String sid = request.getParameter("sid"); String name = request.getParameter("sname"); String address = request.getParameter("saddress"); String[] hobby = request.getParameterValues("shobby"); String str = studentimpl.subString(hobby); student.setId(sid); student.setName(name); student.setAddress(address); student.setHobby(str); studentimpl.updateStudent(student); } } /** * Initialization of the servlet. <br> * * @throws ServletException if an error occurs */ public void init() throws ServletException { // Put your code here } }