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 import="java.util.Date" %>
<%@ page import="java.text.SimpleDateFormat" %>
<%--
Created by IntelliJ IDEA.
User: 97442
Date: 2022/3/21
Time: 16:13
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
当前时间为：
<%
Date d = new Date();//获取系统时间
SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");//设置时间格式
out.print(sdf.format(d)+"</br>");//输出系统时间
int h = d.getHours();//得到系统小时数
if(h>=0&&h<=12){//判断时间范围并输出相应的问候语
out.print("上午好");
}else if(h>=13&&h<=17){
out.print("下午好");
}else{
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
<!--判断是否为闰年--><%!
boolean isRun(int year){
if (year %4==0&& year%100!=0||year %400==0){
return true;
}
else{
return false;
}
}
%>
<%--
Created by IntelliJ IDEA.
User: 97442
Date: 2022/3/21
Time: 16:13
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body><!--调用isRun方法-->
<%
if(isRun(2023)){
out.print("2023年是闰年");
}else{
out.print("2023年不是闰年");
}
%>
</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%>"
<!--设置全局变量--><%! int i = 0; %>
<%--
Created by IntelliJ IDEA.
User: 97442
Date: 2022/3/21
Time: 16:13
To change this template use File | Settings | File Templates.
--%>
<%@ page contentType="text/html;charset=UTF-8" language="java" %>
<html>
<head>
<title>$Title$</title>
</head>
<body>
<%
for(i = 100; i <= 500; i += 100){
%>
<hr width="<%=i%>px"/>
<%} %>
</body>
</html>
