jsp 保存用户名密码有关问题
日期：2014-05-17 浏览次数：20863 次
jsp 保存用户名密码问题
index.jsp
<%@ page contentType="text/html;charset=gb2312"%>
<html>
<head>
<title>登陆</title>
</head>
<body>
<center>
<h1>
<font color="blue">
用户登录
</font>
</h1>
<hr>
<form action=1.jsp method=post>
用户名称：<input type="text" value=<%=request.getAttribute("loginname")%> name=loginname /><br>
密码： <input type="Password" value=<%=request.getAttribute("loginpass")%> name=loginpass /><br>
<input type=checkbox name=rememberme1 value=on>记住用户名<br>
<input type=checkbox name=rememberme2 value=on>记住密码<br>
<input type=submit value="登陆">
<input type=reset value="重置"><BR>
</center>
</body>
</html>
1.jsp
<%@ page contentType="text/html;charset=gb2312"%>
<%!String name;%>
<%!String pass; %>
<%
String userName=request.getParameter("loginname");
String userPass=request.getParameter("loginpass");
String rememberMe1=request.getParameter("rememberme1");
String rememberMe2=request.getParameter("rememberme2");
boolean bool=false;
if (userName.equals("abc") && userPass.equals("123")){
if(rememberMe1 != null && rememberMe1.equals("on")){
Cookie myCookie1=new Cookie("cookiename",userName);
response.addCookie(myCookie1);
myCookie1.setMaxAge(60*60*24);
session.setAttribute("loginname",name);
}
if(rememberMe2 != null && rememberMe2.equals("on")){
Cookie myCookie2=new Cookie("cookiepass",userPass);
response.addCookie(myCookie2);
myCookie2.setMaxAge(60*60*24);
session.setAttribute("loginpass",pass);
}
bool=true;
}
Cookie cookies[]=request.getCookies();
if (cookies != null) {
name=null;
pass=null;
for (int i = 0; i < cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookie.getName().equals("cookiename")) {
name = cookie.getValue();
System.out.println("1234");
}
if (cookie.getName().equals("cookiepass")) {
pass = cookie.getValue();
System.out.println("4");
}
}
if(bool){
response.sendRedirect("login.jsp");
}
}
%>
login.jsp
<%@ page contentType="text/html;charset=gb2312"%>
登陆成功
<a href=index.jsp>重新登录</a>
能获取到cookie但是密码和用户名不保存求助
------解决方案--------------------
你放值的时候用的是session，session.setAttribute("loginpass",pass);
取值时却是request，value=<%=request.getAttribute("loginname")%肯定取不到的啊，要一致
index.jsp
<%@ page contentType="text/html;charset=gb2312"%>
<html>
<head>
<title>登陆</title>
</head>
<body>
<center>
<h1>
<font color="blue">
用户登录
</font>
</h1>
<hr>
<form action=1.jsp method=post>
用户名称：<input type="text" value=<%=request.getAttribute("loginname")%> name=loginname /><br>
密码： <input type="Password" value=<%=request.getAttribute("loginpass")%> name=loginpass /><br>
<input type=checkbox name=rememberme1 value=on>记住用户名<br>
<input type=checkbox name=rememberme2 value=on>记住密码<br>
<input type=submit value="登陆">
<input type=reset value="重置"><BR>
</center>
</body>
</html>
1.jsp
<%@ page contentType="text/html;charset=gb2312"%>
<%!String name;%>
<%!String pass; %>
<%
String userName=request.getParameter("loginname");
String userPass=request.getParameter("loginpass");
String rememberMe1=request.getParameter("rememberme1");
String rememberMe2=request.getParameter("rememberme2");
boolean bool=false;
if (userName.equals("abc") && userPass.equals("123")){
if(rememberMe1 != null && rememberMe1.equals("on")){
Cookie myCookie1=new Cookie("cookiename",userName);
response.addCookie(myCookie1);
myCookie1.setMaxAge(60*60*24);
session.setAttribute("loginname",name);
}
if(rememberMe2 != null && rememberMe2.equals("on")){
Cookie myCookie2=new Cookie("cookiepass",userPass);
response.addCookie(myCookie2);
myCookie2.setMaxAge(60*60*24);
session.setAttribute("loginpass",pass);
}
bool=true;
}
Cookie cookies[]=request.getCookies();
if (cookies != null) {
name=null;
pass=null;
for (int i = 0; i < cookies.length; i++) {
Cookie cookie = cookies[i];
if (cookie.getName().equals("cookiename")) {
name = cookie.getValue();
System.out.println("1234");
}
if (cookie.getName().equals("cookiepass")) {
pass = cookie.getValue();
System.out.println("4");
}
}
if(bool){
response.sendRedirect("login.jsp");
}
}
%>
login.jsp
<%@ page contentType="text/html;charset=gb2312"%>
登陆成功
<a href=index.jsp>重新登录</a>
能获取到cookie但是密码和用户名不保存求助
------解决方案--------------------
你放值的时候用的是session，session.setAttribute("loginpass",pass);
取值时却是request，value=<%=request.getAttribute("loginname")%肯定取不到的啊，要一致
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