<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>登录页面</title>
</head>
<body>
<form action="doLogin.jsp" method="post">
<table>
<tr>
<td>用户名：</td>
<td><input type="text" name="name"></td>
</tr>
<tr>
<tr>
<td>密 码：</td>
<td><input type="password" name="pwd"></td>
</tr>
<tr>
<td colspan="2"><input type="checkbox" name="mdl"/>7日内免登录</td>
</tr>
<tr>
<td><input type="submit" value="提交"></td>
<td><input type="reset" value="重置"></td>
</tr>
</table>
</form>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Insert title here</title>
</head>
<body>
<%
//设置请求对象的字符集为utf-8
request.setCharacterEncoding("UTF-8");
//获取用户名和密码信息
String username = request.getParameter("name");
String password = request.getParameter("pwd");
/*
如果输入的用户名、密码不正确，则跳转到login.jsp页面重新输入，
否则，跳转到welcome.jsp文件
*/
if(username.equals("lxy") && password.equals("123456")){
Cookie cookie1 = new Cookie("username", username);
Cookie cookie2 = new Cookie("password", password);
cookie1.setMaxAge(7*24*60*60);
cookie2.setMaxAge(7*24*60*60);
response.addCookie(cookie1);
response.addCookie(cookie2);
session.setAttribute("username", username);
session.setAttribute("password", password);
response.sendRedirect("welcome.jsp");
} else{
response.sendRedirect("login.jsp");
}
%>
</body>
</html>
<%@ page import="java.util.Date" %>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<meta charset="UTF-8">
<title>Insert title here</title>
</head>
<body>
<h1>
<%-- 使用request对象获取客户端IP地址，并显示出来 --%>
IP地址：<%= request.getRemoteAddr()%><br>
<!-- 显示系统当前时间 -->
现在时间：<%= new Date().toLocaleString()%>
</h1>
<%
response.setHeader("refresh", "1");//设置每秒刷新一次
%>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>显示客户端请求信息</title>
</head>
<body>
<%
//获取并显示客户端提交请求的方式
String method = request.getMethod();
//获取并显示客户端请求的URL
StringBuffer url = request.getRequestURL();
//获取并显示客户端请求的URI
String uri = request.getRequestURI();
//获取并显示客户端请求的查询字符串
String str = request.getQueryString();
//获取并显示客户端提交请求的服务器端路径
String path = request.getServletPath();
//获取并显示协议名称
String host = request.getProtocol();
//获取并显示服务器名称
String server = request.getServerName();
//获取并显示服务器端口号
int port = request.getServerPort();
//获取并显示客户端的IP地址
String addr = request.getRemoteAddr();
out.println("提交请求的方式：" + method + "<br>");
out.println("请求的URL地址：" + url + "<br>");
out.println("请求的URI：" + uri + "<br>");
out.println("请求查询的字符串：" + str + "<br>");
out.println("客户端提交请求的服务器路径：" + path + "<br>");
out.println("协议名称：" + host + "<br>");
out.println("服务器名称：" + server + "<br>");
out.println("服务器端口号：" + port + "<br>");
out.println("远程客户端的IP地址：" + addr + "<br>");
%>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%
String ip = request.getRemoteAddr();
if(ip.startsWith("127", 0)){
out.print("禁止访问！");
}else{
out.print("welcome:" + ip);
}
%>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" buffer="4kb"%>
<html>
<head>
<title>Title</title>
</head>
<body>
<p>使用out对象管理缓冲区</p>
<p>缓冲区大小：<%= out.getBufferSize()%></p>
<p>缓冲区剩余大小：<%= out.getRemaining()%></p>
<p>是否自动清空缓冲区：<%= out.isAutoFlush()%></p>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%
session.invalidate();<%--强制会话失败--%>
response.sendRedirect("login.jsp");
%>
</body>
</html>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>Title</title>
</head>
<body>
<%
Integer count = (Integer) application.getAttribute("count");
if(count == null){
count = 0;
}
count++;
application.setAttribute("count", count);
%>
您是给页面的第<%= count%>个访问者
</body>
</html>
