package servlets; 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 entity.*; import DAO.*; publicclass loginservlet extends HttpServlet { /** *//** * 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 */ publicvoid doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { student s=new studentDAO().login(request.getParameter("username"),request.getParameter("password")); if(s !=null){ request.setAttribute("message", "登陸成功"); }else{ request.setAttribute("message", "登陸失敗"); } request.getRequestDispatcher("/result.jsp").forward(request, response); } }