<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <html> <head> <title>登录页面</title> <style type="text/css"> body { font-size: 16px; } </style> <script type="text/javascript"> function mycheck() { if (form1.userName.value == "") { alert("用户名不能为空，请输入用户名！"); form1.userName.focus(); return; } if (form1.password.value == "") { alert("密码不能为空，请输入密码！"); form1.password.focus(); return; } if (form1.validationCode.value == "") { alert("验证码不能为空，请输入验证码!"); form1.validationCode.focus(); return; } if (form1.validationCode.value != form1.validationCode1.value) { alert("请输入正确的验证码!"); form1.validationCode.focus(); return; } } </script> </head> <body bgcolor="pink"> <form action="loginCheck.jsp" name="form1" method="post"> 用户名：<input type="text" name="userName" size="16"> <br> 密 码： <input type="password" name="password" size="16"> <br> 验证码：<input type="text" name="validationCode" onKeyDown="if(event.keyCode==13){form1.submit.focus();}" size="6"> <% int intmethod1 = (int) (Math.random() * 10); int intmethod2 = (int) (Math.random() * 10); int intmethod3 = (int) (Math.random() * 10); int intmethod4 = (int) (Math.random() * 10); //将得到的随机数进行连接 String intsum = intmethod1 + "" + intmethod2 + intmethod3 + intmethod4; %> <input type="hidden" name="validationCode1" value="<%=intsum%>"> <img src="image/<%=intmethod1%>.jpg"> <img src="image/<%=intmethod2%>.jpg"> <img src="image/<%=intmethod3%>.jpg"> <img src="image/<%=intmethod4%>.jpg"> <br> <input type="submit" name="submit" value="登录" onfocus="mycheck()"> <input type="reset" value="重置"> </form> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <html> <head> <title>处理登录页面的数据</title> </head> <body bgcolor="pink"> <% request.setCharacterEncoding("UTF-8"); String name = request.getParameter("userName"); String password = request.getParameter("password"); if (request.getParameter("validationCode1").equals( request.getParameter("validationCode"))) { if (name.equals("xinfeng") && (password.equals("981107"))) { session.setAttribute("userName", name); response.sendRedirect("main.jsp"); } else { response.sendRedirect("login.jsp"); } } else { response.sendRedirect("login.jsp"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <html> <head> <title>系统主页面</title> </head> <body bgcolor="pink"> <% Object name = session.getAttribute("userName"); String name1 = (String) name; %> 您好<%=name1%>,欢迎您访问！ <br> <a href="exit.jsp">[退出系统]</a> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%> <html> <head> <title>退出系统</title> </head> <body> <% session.invalidate(); response.sendRedirect("login.jsp"); %> </body> </html>
