課程教學平臺設計源碼，java實現 <% //設置編碼格式 request.setCharacterEncoding("GB18030"); //取到表單中用戶填寫的username，userpassword，userClass參數的值 String username = request.getParameter("username"); String userpassword = request.getParameter("userpassword"); System.out.println(username); System.out.println(userpassword); int userClass = Integer.parseInt(request.getParameter("userClass")); System.out.println(userClass); //判斷參數是否為空，或者是空字符串，如果是返回到index.jsp界面，如果符合標準跳到相應的管理后臺界面 if (username == null || username.trim().equals("") || userpassword == null || userpassword.trim().equals("")) { request.getRequestDispatcher("index.jsp").forward(request, response); //response.sendRedirect("index.jsp"); } else { //建立數據庫連接，判斷用戶名和密碼是否在數據庫user表中存在 Connection conn = DB1.getConn(); System.out.println(conn); Statement stmt = DB1.createStmt(conn); //sql語句，從user表中選擇出username和userpassword與用戶填入的一樣的數據 String sql = "select * from user where username = '" + username + "' and userpassword = '" + userpassword + "'"; ResultSet rs = DB1.executeQuery(stmt, sql); System.out.println(conn); if (rs.next()) { //設置session，把用戶名添加到seesion屬性中 session.setAttribute("username", username); request.setAttribute("username", username); request.setAttribute("userClass", userClass); //判斷登陸用戶是那種用戶類型，如果是1跳轉到學生頁面student.jsp， //如果是2跳轉到教師頁面teacher.jsp，如果是3跳轉到管理員界面manager.jsp int uc = rs.getInt(3); if (uc == userClass) { if (uc == 1) { //request.getRequestDispatcher("student.jsp").forward(request, response); response.sendRedirect("student.jsp"); } else if (uc == 2) { //request.getRequestDispatcher("teacher.jsp").forward(request, response); response.sendRedirect("teacher.jsp"); } else if (uc == 3) { //request.getRequestDispatcher("manager.jsp").forward(request, response); response.sendRedirect("manager.jsp"); } }