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                        /JAVA遇见HTML——JSP篇

cookie只记住了密码，没记住用户名是什么情况？

我的代码是这样的

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
    pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
<h1>Login</h1>
<hr>
<%
       String username = "";
       String password = "";
       Cookie[] cookies = request.getCookies();
       if (cookies != null && cookies.length > 0) {
           for (Cookie c : cookies) {
               if (c.getName().equals("usename")) {
                   username = c.getValue();
               }
               if (c.getName().equals("password")) {
                   password = c.getValue();
               }
           }
       }
   %>
<form action="dologin.jsp" method="post" name="loginForm">
<table>
<tr>
<td>Username</td>
<td><input type="text" name="username" value="<%=username%>"/></td>
</tr>
<tr>
<td>Password</td>
<td><input type="password" name="password" value="<%=password%>"/></td>
</tr>
<tr>
<td colspan="2"><input type="checkbox" name="isUseCookie" checked="checked"/>10days</td>
</tr>
<tr>
<td colspan="2" align="center"><input type="submit" value="Login"></td>
</table>
</form>

</body>
</html>

-----------------------

dologin.jsp

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
   pageEncoding="ISO-8859-1"%>
<!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=ISO-8859-1">
<title>Insert title here</title>
</head>
<body>
   <h1>Success</h1>
   <hr>

   <%
       //remenber or not
       String[] isUseCookies = request.getParameterValues("isUseCookie");
       if (isUseCookies != null && isUseCookies.length > 0) {

           //create username and password in cookies
           String username = request.getParameter("username");
           String password = request.getParameter("password");
           Cookie usernameCookie = new Cookie("username", username);
           Cookie passwordCookie = new Cookie("password", password);
           response.addCookie(usernameCookie);
           response.addCookie(passwordCookie);
           //10days
           usernameCookie.setMaxAge(864000);
           passwordCookie.setMaxAge(864000);
       } else {
           Cookie[] cookies = request.getCookies();
           if (cookies != null && cookies.length > 0) {
               for (Cookie c : cookies) {
                   if (c.getName().equals("usename")
                           || c.getName().equals("password")) {
                       c.setMaxAge(0);
                       response.addCookie(c);
                   }
               }
           }
       }
   %>

   <a href="users.jsp">Check User Info</a>
</body>
</html>

---------------------------

users.jsp

<!DOCTYPE HTML><%@page language="java"
   contentType="text/html; charset=ISO-8859-1" pageEncoding="ISO-8859-1"%>
<html>
<head>
<title>index</title>
<meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
</head>
<body>

   <h1>Users</h1>

   <%
       String username = "";
       String password = "";
       Cookie[] cookies = request.getCookies();
       if (cookies != null && cookies.length > 0) {
           for (Cookie c : cookies) {
               if (c.getName().equals("usename")) {
                   username = c.getValue();
               }
               if (c.getName().equals("password")) {
                   password = c.getValue();
               }
           }
       }
   %>
   Username=<%=username%><br> Password=<%=password%><br>
</body>
</html>