第九个JSP作业-注册验证

<%@ 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>注册</title>   
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>  
  <body>
   <form action="do.jsp" method="post">
用户名:<input type="text" name="uname"/><br>
密   码:<input type="password" name="upwd"/><br>
<input type="submit" value="注册">
</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>登录</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  <script type="text/javascript">
   function mycheck() {
//判断验证码是否为空
 if (form1.validationCode.value==""){
alert("验证码不能为空,请输入验证码!");
 form1.validationCode.focus();
 return;
 }
 //判断验证码是否正确
 if (form1.validationCode.value != form1.validationCode1.value) {
 alert("请输入正确的验证码!!");
 form1.validationCode.focus();
 return;
 }
 form1.submit1();
 }
 </script>
  <body>
   <form action="logincheck.jsp" name="form1" method="post">
   用户名:<input type="text" name="userName" size="18"><br>
   密    码:<input type="password" name="password" size="19"><br>
   验证码:<input type="text" name="validationCode" onKeyDown="if(event.keyCode==13){form1.submit.focus();}"size="4">
  <%
  int intmethod1=(int)((((Math.random())*5))+1);
  int intmethod2=(int)((((Math.random())*5))+1);
  int intmethod3=(int)((((Math.random())*5))+1);
  int intmethod4=(int)((((Math.random())*5))+1);  
  String intsum=intmethod1+""+intmethod2+intmethod3+intmethod4;
   %> 
   <input type="hidden" name="validationCode1" value="<%=intsum%>">
   <img style="height:20px;weight:20px" src="images/<%=intmethod1 %>.png">
   <img style="height:20px;weight:20px" src="images/<%=intmethod2 %>.png">
   <img style="height:20px;weight:20px" src="images/<%=intmethod3 %>.png">
   <img style="height:20px;weight:20px" src="images/<%=intmethod4 %>.png">
   <br>  
<input type="submit" value="登录">
<a href="register.jsp">注册</a>
</form>
  </body>
</html>

  

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%@page import="com.gd.entity.Users"%>
<%@page import="com.gd.entity.Msg"%>
<%@page import="com.gd.dao.MsgDao"%>
<%@page import="com.gd.dao.UsersDao"%>
<%
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>登录</title>
	<meta http-equiv="pragma" content="no-cache">
	<meta http-equiv="cache-control" content="no-cache">
	<meta http-equiv="expires" content="0">    
	<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
	<meta http-equiv="description" content="This is my page">
	<!--
	<link rel="stylesheet" type="text/css" href="styles.css">
	-->
  </head>
  <body>
  <%
  request.setCharacterEncoding("UTF-8");
Users a=new Users();
	String uname = request.getParameter("uname");
	String upwd = request.getParameter("upwd");
	String email = request.getParameter("uemail");
	a.setUsername(uname);
	a.setPassword(upwd);
	a.setEmail(email);
	UsersDao as=new UsersDao();
	as.addUsers(a);
	request.getRequestDispatcher("index.jsp").forward(request, response);
%>
  </body>
</html>

  

<%@page import="com.gd.entity.Users"%>
<%@page import="com.gd.dao.UsersDao"%>
<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<%
	request.setCharacterEncoding(UTF-8");
	String uname = request.getParameter("uname");
	String upwd = request.getParameter("upwd");
	UsersDao ud = new UsersDao();
	if(request.getParameter("validationCode1").equals(request.getParameter("validationCode")))			
{			
	if (ud.login(uname, upwd)){		
	//登录成功,创建User对象,并放入session
		Users u=new Users();
		u.setUsername(uname);
		u.setPassword(upwd);
		session.setAttribute("user", u);
		request.getRequestDispatcher("main.jsp").forward(request, response);
	}
	else{
		response.sendRedirect("index.jsp");
		}
	}
		else{			
                response.sendRedirect("index.jsp");			
                      }		
%>

  

原文地址:https://www.cnblogs.com/minmeishaonv/p/12919572.html