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📄 login.jsp

📁 mysql+连接池+JavaBean 实现用户注册登陆系统
💻 JSP
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<%@ page contentType="text/html; charset=gb2312" language="java"  errorPage="error.jsp" %>
<%@ page import="java.sql.*" %>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">

<html><head>

<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<META HTTP-EQUIV="Pragma" CONTENT="no-cache"> 
<META HTTP-EQUIV="Cache-Control" CONTENT="no-cache"> 
<META HTTP-EQUIV="Expires" CONTENT="0">

<link rel="stylesheet" href="register.css" type="text/css">

<title>用户登陆</title>
</head>

	<!--以下为javascript部分,判断用户名和密码栏是否为空-->
	<script language="javascript">
		<!--
		function loginsubmit()
		{
		   ID = document.form.ID.value;
		   password = document.form.password.value;
		   if(ID==""||ID.length>25){
			 alert("您的用户忘了填写了或者字符数超过规定长度25!");
			 document.form.ID.focus();
		   }
		   else if(password==""||password.length>20||password.length<6){
			 alert("您的密码忘了填写了或者长度不正确[6-20]!");
			 document.form.password.focus();  
		   }
		   else {
			 document.form.submit();
		   }
		}
		-->
	</script>

<body>

	<table width="90%" border="0" cellspacing="0" cellpadding="0" align="center">
	<tr>
	  <td height="35">&nbsp;</td>
	</tr>  

	<tr>
	  <td height="1" align="center">
	<%
	String info = request.getParameter("info");  
	   
	  if(("1").equals(info))
		out.println("<font size=4 color='red'>用户名不存在,请重新登陆!</font><br><br><br>");	
	  else if(("2").equals(info))
		out.println("<font size=4 color='red'>密码不正确,请重新登陆!</font><br><br><br>");	
	  else if(info.equals("3"))
		out.println("<font size=4 color='red'>验证码不正确,请重新登陆!</font><br><br><br>");	   		
	  else
		out.println("<font size=4 color='red'>请登陆!</font><br><br><br>");
		
	%>  
	  </td>
	</tr> 	
	
	<tr> 
	  <td align="center">
	  <!--登陆部分-->
	  <form method=post action="chek_login.jsp" name="form">

		<table width="170" border="0" cellspacing="0" cellpadding="0">
		  <tr>
			<td><img src="imags/userlogin.gif" border="0"></td>
		  </tr>
		</table>		
		
		<table width="170" bgcolor="D2E8FF" 
				style="border-bottom:1px solid #0079CE; 
				border-left:1px solid #0079CE; 
				border-right:1px solid #0079CE ">
		  <tr><td height="5"></td></tr>

		  <tr><td><img src="imags/username2.gif"></td>
		  <td><input type="text" name="ID" size="13" value="jkh"></td></tr>     

		  <tr><td width="56"><img src="imags/userps2.gif"></td>
		  <td width="113"><input type="Password" name="password" size="13" value="123456"></td></tr>

		  <tr><td width="56"><img src="imags/userym2.gif"></td><td width="113">
		  <input type="text" name="chkcode" size="4">&nbsp;<img border=1 src="createMa.jsp"></td></tr>

		  <tr>
			<td align="center" colspan="2" height="30"><a href="javascript:loginsubmit();">
			<img src="imags/log_button.gif" border="0"></a>&nbsp;<a href="register.jsp">
			<img src="imags/reg_button.gif" border="0"></a></td>
		  </tr>

		  <tr><td colspan="2" align="right"></td></tr>
		</table>  
	  </form>				
	  <!--登陆部分-->		
	  </td>
	</tr>
	<tr> 
	  <td> 
	  </td>
	</tr>
	</table>
</body>
</html>

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