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<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>用户登录</title> </head> <body> <% String username = request.getParameter("e" String password = request.getParameter("d" if(username != null && password != null) { if(username.equals("admin" && password.equals("123456" session.setAttribute(""e); response.sendRedirect("welcome.jsp" } else { out.println("<script>alert('用户名或密码错误');</script>" } } %> <div class="301b39c56fc1240c login-container"gt; <h2>用户登录</h2> <form method="post"> <input type="text" name="username" placeholder="用户名" required> <input type="password" name="password" placeholder="密码" required> <button type="submit">登录</button> </form> </div> </body> </html><%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="-8"gt;