我想实现的功能是:第一次在login.jsp页面输入任意用户名和密码登录后,自动跳转到home.jsp。
第二次打开home.jsp,能够自动登录。
因为我也是参考别人的做的,home.jsp的程序有错误,不知道怎么改。
<%@ page contentType="text/html;charset=GB2312" language="java" import="java.sql.*"
errorPage="" %>
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html;
charset=GB2312"/>
<title>登录界面</title>
</head><body>
<form id="form1" name="form1" method="post" action="login.jsp">
<p>用户名:<input name="userName" type="text" id="userName"/><p>口令:<input name="pw" type="password" id="pw"/><p> <input type="submit" name="submit" value="登录"/></form>
<%String UserName = request.getParameter("userName");
String UserCode = request.getParameter("pw");
Cookie a=new Cookie("Name1",UserName);
Cookie b=new Cookie("Name2",UserCode);
response.addCookie(a);
response.addCookie(b);
a.setMaxAge(1000*24*60*60);
b.setMaxAge(1000*24*60*60);
<java:forward page="home.jsp"/>
%>
</body>
</html>
<%@ page contentType="text/html;charset=GB2312" language="java" import="java.sql.*"
errorPage="" %>
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html;
charset=GB2312"/>
<title>主页</title>
</head>
<body>
<%String usernameCookie = null;
String passwordCookie = null;
Cookie[] cookies = request.getCookies();
if (cookies != null) {
for (Cookie cookie : cookies) {
if ("Name1".equals(cookie.getName())) {
usernameCookie = cookie.getValue(); // 得到cookie的用户名
}
if ("Name2".equals(cookie.getName())) {
passwordCookie = cookie.getValue(); // 得到cookie的密码
}
}
if (usernameCookie != null && passwordCookie != null) { // 如果存在
if(login.checkLogin(usernameCookie ,passwordCookie)){
response.sendRedirect("home.jsp"); // 登陆成功的处理
}else{
<jsp:forward page="login.jsp"/>
}
}
}
%>
</body>
</html>
第二次打开home.jsp,能够自动登录。
因为我也是参考别人的做的,home.jsp的程序有错误,不知道怎么改。
<%@ page contentType="text/html;charset=GB2312" language="java" import="java.sql.*"
errorPage="" %>
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html;
charset=GB2312"/>
<title>登录界面</title>
</head><body>
<form id="form1" name="form1" method="post" action="login.jsp">
<p>用户名:<input name="userName" type="text" id="userName"/><p>口令:<input name="pw" type="password" id="pw"/><p> <input type="submit" name="submit" value="登录"/></form>
<%String UserName = request.getParameter("userName");
String UserCode = request.getParameter("pw");
Cookie a=new Cookie("Name1",UserName);
Cookie b=new Cookie("Name2",UserCode);
response.addCookie(a);
response.addCookie(b);
a.setMaxAge(1000*24*60*60);
b.setMaxAge(1000*24*60*60);
<java:forward page="home.jsp"/>
%>
</body>
</html>
<%@ page contentType="text/html;charset=GB2312" language="java" import="java.sql.*"
errorPage="" %>
<html>
<head>
<meta http-equiv="Content-Type"
content="text/html;
charset=GB2312"/>
<title>主页</title>
</head>
<body>
<%String usernameCookie = null;
String passwordCookie = null;
Cookie[] cookies = request.getCookies();
if (cookies != null) {
for (Cookie cookie : cookies) {
if ("Name1".equals(cookie.getName())) {
usernameCookie = cookie.getValue(); // 得到cookie的用户名
}
if ("Name2".equals(cookie.getName())) {
passwordCookie = cookie.getValue(); // 得到cookie的密码
}
}
if (usernameCookie != null && passwordCookie != null) { // 如果存在
if(login.checkLogin(usernameCookie ,passwordCookie)){
response.sendRedirect("home.jsp"); // 登陆成功的处理
}else{
<jsp:forward page="login.jsp"/>
}
}
}
%>
</body>
</html>
String userName = "";
String password = ""; Cookie[] cookies = request.getCookies();
if (cookies != null) {
for (int i = 0; i < cookies.length; i++) {
Cookie c = cookies[i];
if(c.getName().equalsIgnoreCase("UserName")) {
userName = c.getValue();
}
if(c.getName().equalsIgnoreCase("Password")) {
password = c.getValue();
}
}
}
if (userName != null && !userName.trim().equals("") && password != null && !password.trim().equals("")) {
<java:forward page="home.jsp"/>
}
%>
2.home页面中判断Cookie中记录的用户名密码是否可以登录。可以登录转到home页面;不可以登录清除Cookie,转到登录页面。
<%
String usernameCookie = null;
String passwordCookie = null;
Cookie[] cookies = request.getCookies();
if (cookies != null) {
for (Cookie cookie : cookies) {
if ("Name1".equals(cookie.getName())) {
usernameCookie = cookie.getValue(); // 得到cookie的用户名
}
if ("Name2".equals(cookie.getName())) {
passwordCookie = cookie.getValue(); // 得到cookie的密码
}
}
if (usernameCookie != null && passwordCookie != null) { // 如果存在
if(login.checkLogin(usernameCookie ,passwordCookie)){
response.sendRedirect("home.jsp"); // 登陆成功的处理
}else{
Cookie cookie = new Cookie("UserName", null);
cookie.setMaxAge(0);
response.addCookie(cookie);
cookie = new Cookie("Password", null);
cookie.setMaxAge(0);
response.addCookie(cookie);
cookie = new Cookie("Remember", null);
cookie.setMaxAge(0);
response.addCookie(cookie);
<jsp:forward page="login.jsp"/>
}
}
}
%>