JSP cookie记住用户名密码

在这里插入图片描述

login.jsp

<body>
	<%
		// 获取cookie
		Cookie[] cookies = request.getCookies();
		String username="";
		String password="";
		if(cookies!=null){
			for(Cookie c:cookies){
				if("USERNAME".equals(c.getName())){
					username=c.getValue();
				}
				if("PASSWORD".equals(c.getName())){
					password=c.getValue();
				}
			}
		}
		
	%>

	<form action="check.jsp" method="get">
		<input type="text" name="username" placeholder="请输入用户名" value="<%=username %>">
		<br> <br> <input type="password" name="password"
			placeholder="请输入用密码" value="<%=password %>"> <br> <br> <input
			type="checkbox" name="logincheck">是否记住用户名及密码 <br> <br>
		<input type="submit" value="登录">
	</form>
</body>

check.jsp

<body>
	<%
	
		String username=request.getParameter("username");
		String password=request.getParameter("password");
		String logincheck=request.getParameter("logincheck");
		
		request.setAttribute("book", "javaWeb");
		if("admin".equals(username)&&"123456".equals(password)){	
			//
			if(logincheck!=null){
				// 创建cookie
				Cookie USERNAME=new Cookie("USERNAME",username);
				Cookie PASSWORD=new Cookie("PASSWORD",password);		
				// 设置有效期
				USERNAME.setMaxAge(60);
				PASSWORD.setMaxAge(60);		
				response.addCookie(USERNAME);
				response.addCookie(PASSWORD);			
			}		
			session.setAttribute("UserName", username);
			// 重定向
			response.sendRedirect("main.jsp");		
			// 转发
			//request.getRequestDispatcher("main.jsp").forward(request, response);		
			//RequestDispatcher rd=request.getRequestDispatcher("main.jsp");
			//rd.forward(request, response);
		}else{
			
			response.sendRedirect("login.jsp");
		}
	%>
</body>

loginout.jsp

<body>
	<%
		session.invalidate();
		response.sendRedirect("login.jsp");
	%>
</body>

main.jsp

<body>
	<%
		Object  obj =session.getAttribute("UserName");
	
		if(obj==null){
			response.sendRedirect("login.jsp");
		}
		
	%>
	<h1>login seccess</h1>
	欢迎
	<h1><%=session.getAttribute("UserName") %></h1>
	<a href="logout.jsp">退出登录</a>
  
</body>

来源：CSDN

作者：小红帽与灰太狼

链接：https://blog.csdn.net/weixin_42277719/article/details/103482632

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用户名