java中response对象用法实例分析

2019-11-26 14:42:38

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本文实例讲述了java中response对象用法。分享给大家供大家参考，具体如下：

<jsp:forward>动作元素用于运行时在服务器端结束当前页面的执行，并从当前页面转向指定页面。

使用response对象的setHeader()方法可以设置页面的自动刷新时间间隔。实现每隔60秒重新加载本页面的语句为：

复制代码代码如下:

response.setHeader("refresh",60);

而实现3秒后浏览器加载新页面//www.VeVB.COm的语句为：

复制代码代码如下:

response.setHeader("refresh","3;URL=//www.VeVB.COm");

response的方法：void sendRedirect(String url)，将页面重定向到指定的URL地址上。

实例：使用response实现用户登录功能

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head>  <title>登录功能实例</title>  <meta http-equiv="keywords" content="keyword1,keyword2,keyword3">  <meta http-equiv="description" content="this is my page">  <meta http-equiv="content-type" content="text/html; charset=UTF-8">  <!--<link rel="stylesheet" type="text/css" href="./styles.css">--> </head> <body>  <center>  <h1>登录界面</h1>  <form action="login.jsp" method="post">        姓名：<input type="text" name="name"><br>    密码：<input type="password" name="pwd"><br>    <input type="submit" name="submit" value="登录">    <input type="reset" name="reset" value="重置">  </form>  </center> </body></html>

<%@ page language="java" import="java.util.*" contentType="text/html;charset=UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head>  <base href="<%=basePath%>">  <title>登录功能实例</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0">   <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body>  <center>  <h1>登录功能实例</h1>  <%   request.setCharacterEncoding("UTF-8");   String name = request.getParameter("name");   String pwd = request.getParameter("pwd");   if(name != null && pwd != null && name.equals("guanlin") && pwd.equals("123"))   {    //response.sendRedirect("success.jsp");  %>  <jsp:forward page="success.jsp"></jsp:forward>  <%}else  {  out.println("<font color='red'>用户名或密码错误，5秒钟回到登录页面，如果不想等待请点<a href='response/login.html'>返回登录</a></font>");  response.setHeader("refresh","5;url = login.html");  }  %>  </center> </body></html>

success.jsp的源代码如下：

<%@ page language="java" import="java.util.*" contentType="text/html;charset=UTF-8"%><%String path = request.getContextPath();String basePath = request.getScheme()+"://"+request.getServerName()+":"+request.getServerPort()+path+"/";%><!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"><html> <head>  <base href="<%=basePath%>">  <title>登录功能实例</title> <meta http-equiv="pragma" content="no-cache"> <meta http-equiv="cache-control" content="no-cache"> <meta http-equiv="expires" content="0">   <meta http-equiv="keywords" content="keyword1,keyword2,keyword3"> <meta http-equiv="description" content="This is my page"> <!-- <link rel="stylesheet" type="text/css" href="styles.css"> --> </head> <body>  <center>  <h1 style="green">登录成功!</h1>  <%   request.setCharacterEncoding("UTF-8");   String name = request.getParameter("name");   String pwd = request.getParameter("pwd");   %>   登录的用户名为：<%=name %><br>   登录的密码为：<%=pwd %>  </center> </body></html>

希望本文所述对大家Java程序设计有所帮助。

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