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:
而实现3秒后浏览器加载新页面//www.zzvips.com的语句为:
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
login.html为登录表单页面
login.jsp为信息处理页面,用来验证用户登录是否成功。
success.jsp为登录成功后的跳转页面。
login.html的源代码如下:
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<!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 > |
login.jsp的源代码如下:
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<%@ 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:
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<%@ 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。