中文乱码？？cookie保存中文用户名出现“？？”
显示结果为 用户名??
源程序如下
login.jsp
<%@ page language="java" import="java.util.*,java.net.*" contentType="text/html; utf-8"%>
<%@ page import="java.text.*" %>
<%
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 'index.jsp' starting page名字</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>
<h1>用户登录</h1>
<hr>
<%
request.setCharacterEncoding("utf-8");
String username="";
String password="";
Cookie[] cookies=request.getCookies();
if (cookies!=null && cookies.length>0){
for (Cookie c:cookies){
if (c.getName().equals("username")){
username = URLDecoder.decode(c.getValue(),"utf-8");
}
if (c.getName().equals("password")){
password = URLDecoder.decode(c.getValue(),"utf-8");
}
}
}
%>
<div id="container">
<div class="logo">
<a href="#"><img src="assets/logo.png" alt="" /></a>
</div>
<div id="box">
<form action="dologin.jsp" method="post">
<table>
<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"><input type="checkbox" name="isUseCookie"
checked="checked" />十天内记住我的登录状态</td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="登录" />
<input type="reset" value="取消" /></td>
</tr>
</table>
</form>
</div>
</div>
</body>
</html>dologin.jsp
<%@ page language="java" import="java.util.*,java.net.*" contentType="text/html; utf-8"%>
<%@ page import="java.text.*" %>
<%
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 'index.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");//防止中文乱码
%>
<%
String[] isUseCookie=request.getParameterValues("isUseCookie");
if (isUseCookie!=null && isUseCookie.length>0){
String username=URLEncoder.encode(request.getParameter("username"),"utf-8");
String password=URLEncoder.encode(request.getParameter("password"),"utf-8");
Cookie usernameCookie=new Cookie("username",username);
Cookie passwordCookie=new Cookie("password",password);
usernameCookie.setMaxAge(86400);
passwordCookie.setMaxAge(86400);
response.addCookie(usernameCookie);
response.addCookie(passwordCookie);
}
else{
Cookie[] cookies=request.getCookies();
if (cookies!=null && cookies.length>0){
for (Cookie c:cookies){
if (c.getName().equals("username") || c.getName().equals("password")){
c.setMaxAge(0);
response.addCookie(c);
}
}
}
}
%>
<a href="users.jsp" target="_blank">查看用户信息</a>
</body>
</html>
users.jsp
<%@ page language="java" import="java.util.*,java.net.*" contentType="text/html; utf-8"%>
<%@ page import="java.text.*" %>
<%
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 'index.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>
<h1>用户信息</h1>
<hr>
<%
request.setCharacterEncoding("utf-8");
String username="";
String password="";
Cookie[] cookies=request.getCookies();
for (Cookie c:cookies){
if (c.getName().equals("username")){
username=URLDecoder.decode(c.getValue(),"utf-8");
}
if (c.getName().equals("password")){
password=URLDecoder.decode(c.getValue(),"utf-8");
}
}
%>
<br>
<br>
用户名<%=username %><br>
密码<%=password %><br>
</body>
</html>
