JSP实时显示当前系统时间的四种方式示例解析(在jsp页面中显示变量的值)满满干货

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JSP显示当前系统时间的四种方式:

第一种java内置时间类实例化对象:

<%@ 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=”https://www.jb51.net/article/<%=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=”https://www.jb51.net/article/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(“当前时间为:”+time);
%>

</body>
</html>

第二种方式使用JSP内置USEBEAN实例化时间类:

<%@ 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=”https://www.jb51.net/article/<%=basePath%>” rel=”external nofollow” rel=”external nofollow” rel=”external nofollow” rel=”external nofollow” >

<title>显示系统时间方法一:</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=”https://www.jb51.net/article/styles.css” rel=”external nofollow” rel=”external nofollow” rel=”external nofollow” rel=”external nofollow” >
–>

</head>

<body>
<jsp:useBean id=”time” class=”java.util.Date”/>
现在时间:<%=time%>
</body>
</html>

第三种方式使用JSP USEBEAN type与beanName配对使用:

<%@ 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=”https://www.jb51.net/article/<%=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=”https://www.jb51.net/article/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”/>
现在时间:<%=time%>
</body>
</html>

第四种方式使用JSP setproperty设置属性:

<%@ 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=”https://www.jb51.net/article/<%=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=”https://www.jb51.net/article/styles.css” rel=”external nofollow” rel=”external nofollow” rel=”external nofollow” rel=”external nofollow” >
–>

</head>

<body>
jsp:setproperty 实例<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>
设置属性后的时间:${time} }
<br>

</body>
</html>

所有代码均能直接复制到MYECLIPSE2010

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