J2EE实验4：Cookie操作

来源：互联网发布：原生js实现数据绑定编辑：程序博客网时间：2024/04/29 13:58

实验4：Cookie操作

实验要求：

编写主页index.jsp，可参考如下页面：
在登录验证页面login.jsp中只需简单判断用户名为abc、密码为123即可。关键操作是判断复选框选中与否状态，并将用户名称或密码值保存到cookie中，最后通过简单的链接返回到index.jsp。

index.jsp

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><body><center><h1>实验004登录</h1></center><hr/><%String CookieUserName = "";String CookiePassWord = "";Cookie[] CookieArray = request.getCookies();if (CookieArray != null){for (int i = 0;i < CookieArray.length;i ++){if (CookieArray[i].getName().equals("CookieUserName")){CookieUserName = CookieArray[i].getValue();}else if (CookieArray[i].getName().equals("CookiePassWord")){CookiePassWord = CookieArray[i].getValue();}}} %><form name=myform action="login.jsp" method="post"><table width="100%"><tr><td colspan="2" align="center"><img src="img/icon.bmp"></td></tr><tr><td align="right" width="45%">用户名称：</td><td><input type="text" name="UserName" value="<%=CookieUserName%>"/></td></tr><tr><td align="right">密码：</td><td><input type="password" name="PassWord" value="<%=CookiePassWord%>"/></td></tr><tr><td colspan="2" align="center"><input type="checkbox" name="UserNameCheckBox" value="true">自动记录名称</td></tr><tr><td colspan="2" align="center"><input type="checkbox" name="PassWordCheckBox" value="true">自动记录密码</td></tr><tr><td colspan="2" align="center"><input type="submit" value="登录"> <input type="reset" value="重置"></td></tr></table></form><hr/></body>

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%><center><%final String DBUserName = "abc";final String DBPassWord = "123";String UserName = request.getParameter("UserName");String PassWord = request.getParameter("PassWord");if (UserName.equals(DBUserName)){if (PassWord.equals(DBPassWord)){out.print("<strong>登录成功。<strong><br/>");String RememberUserName = request.getParameter("UserNameCheckBox");String RememberPassWord = request.getParameter("PassWordCheckBox");if (RememberUserName != null && RememberUserName.equals("true")){Cookie CookieUserName = new Cookie("CookieUserName",UserName);CookieUserName.setMaxAge(7 * 24 * 60 * 60);//设置有效期7天   response.addCookie(CookieUserName); }if (RememberPassWord != null && RememberPassWord.equals("true")){Cookie CookiePassWord = new Cookie("CookiePassWord",PassWord);CookiePassWord.setMaxAge(7 * 24 * 60 * 60);//设置有效期7天   response.addCookie(CookiePassWord); }}else{out.print("<strong>密码不正确。<strong><br/>");}}else{out.print("<strong>账号不正确。<strong><br/>");} %><a href="index.jsp">重新登录</a> </center>

Cookie的内容都保存在客户端，所以一般用来保存表单、记住账号密码等。

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