01

複製貼上沒難度, 過不去就是敲錯了...

02

        PrintWriter writer = resp.getWriter();
        String verifycode = req.getParameter("verifycode");
        String username = req.getParameter("username");
        String password = req.getParameter("password");
        HttpSession session =req.getSession();
        String realCode = (String) session.getAttribute("sessionYzm");

        if(!verifycode.equals(realCode)){
            writer.write("驗證碼錯誤");
        }else{
            // writer.write("驗證碼正確");
            if(username.equals("admin") && password.equals("admin123")){
                writer.write("登入成功");
            }else{
                writer.write("登入失敗");
            }
        }
 

03

        PrintWriter writer = resp.getWriter();
       HttpSession session = req.getSession();
       String trueCaptcha = (String)session.getAttribute(Constants.KAPTCHA_SESSION_KEY);
       String inputCaptcha = req.getParameter("captcha");
       if(trueCaptcha.toLowerCase().equals(inputCaptcha.toLowerCase())) {
           writer.write("驗證碼輸入正確");
       } else {
           writer.write("驗證碼輸入錯誤");
       }
 

還有個檔案同 01, 複製貼上沒難度

N/A

本來想發評論區的, 發現還要實名... 算了