JSP第二周作业

1.p39   实验2 显示当前时间,并输出上午(0-12)好,下午好(13-17),晚上好(18-23)

<%@ 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%>">

<title>My JSP 'index.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">
    -->
</head>

<body>
    <%
        //java注释
        Calendar c = Calendar.getInstance();
        int hour = c.get(Calendar.HOUR);//获取小时
        int minute = c.get(Calendar.MINUTE);//获取分钟
        int second = c.get(Calendar.SECOND);//获取秒
        System.out.println("当前时间:" + hour + ":" + minute + ":" + second);//控制台输出
        if (hour >= 0 && hour <= 12) {
            System.out.println("早上好");
        } else if (hour >= 13 && hour <= 17) {
            System.out.println("下午好");
        } else if (hour >= 18 && hour <= 23) {
            System.out.println("晚上好");
        }
        Date d = new Date();
        int h = d.getHours(); //获取小时
        int m = d.getMinutes();//获取分钟
        int s = d.getSeconds();//获取秒
        out.print("当前时间:" + h + ":" + m + ":" + s + "<br>");//网页输出
        if (h >= 0 && h <= 12) {
            out.print("早上好!");
        } else if (h >= 13 && h <= 17) {
            out.print("下午好!");
        } else if (h >= 18 && h <= 23) {
            out.print("晚上好!");
        }
    %>
</body>
</html>

 

 

 

2. 使用声明方法,在页面调用该方法,判断2023是不是闰年
闰年:能被4整除但不能被100整除或者能被400整

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%
    String path = request.getContextPath();
    String basePath = request.getScheme() + "://"
            + request.getServerName() + ":" + request.getServerPort()
            + path + "/";
%>

<%!boolean isRun(int year) {
        if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
            return true;
        }
        return false;
    }%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<!-- HTML注释 -->
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.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">
    -->
</head>

<body>
    <%
        boolean a = isRun(2023);
        out.print(a);
    %>
</body>
</html>

 

3.表达式+程序段   循环输出5条<hr>,长度分别为100px-500px

<hr width="<%=i%>"

<%@ 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注释 -->
<html>
<head>
<base href="<%=basePath%>">

<title>My JSP 'index.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">
    -->
</head>
<%--jsp注释 --%>
<body>
    <%
        for (int i = 1; i <= 5; i++) {
    %>
    <hr width="<%=i * 100%>px">
    <%
        }
    %>
</body>
</html>

 

 

 

 

 

4.在第一题上加Java注释,第二题加html注释,第三题加jsp注释

 

posted @ 2022-03-09 11:50  Wowbubble  阅读(16)  评论(0编辑  收藏  举报