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cookie与session的区别

2015-07-26 12:27 399 查看 


















<%@page import="java.net.URLDecoder"%>
<%@ page language="java" import="java.util.*" contentType="text/html; charset=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>My JSP 'login.jsp' starting page</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="dologin.jsp" name="loginForm" method="post">
<table>
<%
request.setCharacterEncoding("utf-8");
String username = "";
String password = "";
Cookie[] cookies = request.getCookies();
if(cookies != null && cookies.length > 0){
for(Cookie c: cookies){
if("username".equals(c.getName())){
username = URLDecoder.decode(c.getValue(), "utf-8");
}
if("password".equals(c.getName())){
password = URLDecoder.decode(c.getValue(),"utf-8");
}
}
}
%>
<tr>
<td>用户名：</td>
<td><input type="text" name="username" value="<%=username%>"/></td>
</tr>
<tr>
<td>密码：</td>
<td><input type="password" name="password" value="<%=password%>"/></td>
</tr>
<tr>
<td colspan="2" align="center"><input type="checkbox" name="useCookie">下次自动登陆</td>
</tr>
<tr>
<td colspan="2" align="center">
<input type="submit" value="登陆"/>
</td>
</tr>
</table>
</form>
</body>
</html>


<%@page import="java.net.URLEncoder"%>
<%@ page language="java" import="java.util.*" contentType="text/html; charset=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>My JSP 'dologin.jsp' starting page</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");
String username = "";
String password = "";
if(request.getParameter("username") != null){
username = URLEncoder.encode(request.getParameter("username").toString(),"utf-8");
}
if(request.getParameter("password") != null){
password = URLEncoder.encode(request.getParameter("password").toString(),"utf-8");
}
if(request.getParameter("useCookie") != null){
Cookie c1 = new Cookie("username", username);
Cookie c2 = new Cookie("password", password);
c1.setMaxAge(864000);
c1.setMaxAge(864000);
response.addCookie(c1);
response.addCookie(c2);
}else{
Cookie[] cookies = request.getCookies();
if(cookies != null && cookies.length > 0){
for(Cookie c: cookies){
if("username".equals(c.getName()) || "password".equals(c.getName())){
c.setMaxAge(0);
response.addCookie(c);
}
}
}
}
%>
<a href="userInfo.jsp">查看用户信息</a>
</body>
</html>


<%@page import="java.net.URLDecoder"%>
<%@page import="java.net.URLEncoder"%>
<%@ page language="java" import="java.util.*" contentType="text/html; charset=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>My JSP 'dologin.jsp' starting page</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>
<%
String username = "";
String password = "";
Cookie[] cookies = request.getCookies();
if(cookies != null && cookies.length > 0){
for(Cookie c: cookies){
if("username".equals(c.getName())){
username = URLDecoder.decode(c.getValue(),"utf-8");
}
if("password".equals(c.getName())){
password = URLDecoder.decode(c.getValue(),"utf-8");
}
}
}
%>
用户名：<%=username %><br/>
密码：<%=password %>
</body>
</html>
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