JSP實時顯示當(dāng)前系統(tǒng)時間的四種方式示例解析
JSP顯示當(dāng)前系統(tǒng)時間的四種方式:
第一種java內(nèi)置時間類實例化對象:
<%@ page language="java" import="java.util.*" pageEncoding="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%>" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <title>My JSP 'time4.jsp' starting page</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" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > --> </head> <body> <% java.text.SimpleDateFormat simpleDateFormat = new java.text.SimpleDateFormat( "yyyy-MM-dd HH:mm:ss"); java.util.Date currentTime = new java.util.Date(); String time = simpleDateFormat.format(currentTime).toString(); out.println("當(dāng)前時間為:"+time); %> </body> </html>
第二種方式使用JSP內(nèi)置USEBEAN實例化時間類:
<%@ page language="java" import="java.util.*" pageEncoding="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%>" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <title>顯示系統(tǒng)時間方法一:</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" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > --> </head> <body> <jsp:useBean id="time" class="java.util.Date"/> 現(xiàn)在時間:<%=time%> </body> </html>
第三種方式使用JSP USEBEAN type與beanName配對使用:
<%@ page language="java" import="java.util.*" pageEncoding="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%>" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <title>My JSP 'time2-useBean-type-beanName.jsp' starting page</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" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > --> </head> <body> <jsp:useBean id="time" type="java.io.Serializable" beanName="java.util.Date"/> 現(xiàn)在時間:<%=time%> </body> </html>
第四種方式使用JSP setproperty設(shè)置屬性:
<%@ page language="java" import="java.util.*" pageEncoding="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%>" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > <title>My JSP 'time3-setproperty.jsp' starting page</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" rel="external nofollow" rel="external nofollow" rel="external nofollow" rel="external nofollow" > --> </head> <body> jsp:setproperty 實例<hr> <jsp:useBean id="time" class="java.util.Date"> <jsp:setProperty name="time" property="hours" param="hh"/> <jsp:setProperty name="time" property="minutes" param="mm"/> <jsp:setProperty name="time" property="seconds" param="ss"/> </jsp:useBean> <br> 設(shè)置屬性后的時間:${time} } <br> </body> </html>
所有代碼均能直接復(fù)制到MYECLIPSE2010
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