<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>登陆验证</title> <script type="text/javascript"> function check(){ if(form1.username.value== ""){ alert("用户名不能为空"); return; } if(form1.password.value== ""){ alert("密码不能为空"); return; } if(form1.validationcode.value== ""){ alert("验证码不能为空"); return; } if(form1.validationcode.value!=form1.validationcode1.value){ alert("请正确输入验证码"); return; } } check(); </script> </head> <body> <form action="text6/logincheck.jsp" method="post" name="form1"> 用户名:<input type="text" name="username" size="16"> 密码:<input type="text" name="password" size="16"> 验证码:<input type="text" name="validationcode"onKeyDown="if(event.keyCode==13){form1.submit.focus();}" size="6"> <% int number1=(int)(Math.random()*10); int number2=(int)(Math.random()*10); int number3=(int)(Math.random()*10); int number4=(int)(Math.random()*10); String numsum = number1+""+number2+number3+number4; %> <input type="hidden" name="validationcode1" value=<%=numsum %>> <img src="image/<%=number1%>.jpg"> <img src="image/<%=number2%>.jpg"> <img src="image/<%=number3%>.jpg"> <img src="image/<%=number4%>.jpg"> <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"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>登陆信息处理页面</title> </head> <body> <% request.setCharacterEncoding("UTF-8"); String name = request.getParameter("username"); String password = request.getParameter("password"); if(name.equals("guoyang")&&password.equals("123456")){ session.setAttribute("username", name); response.sendRedirect("main.jsp"); }else{ response.sendRedirect("login.jsp"); } %> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>主页面</title> </head> <body> <% Object name=session.getAttribute("username"); String name1=(String)name; %> 欢迎<%=name1 %>访问系统<br> <a href="text6/exit.jsp">退出系统</a> </body> </html>
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%> <% String path = request.getContextPath(); String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/"; %> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <head> <base href="<%=basePath%>"> <title>退出系统</title> </head> <body> <% session.invalidate(); response.sendRedirect("login.jsp"); %> </body> </html>