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>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<%
Calendar c = Calendar.getInstance();
int year = c.get(Calendar.YEAR);//获取年份
int month = c.get(Calendar.MONTH);//获取月份
int date = c.get(Calendar.DATE);//获取天数
int hour = c.get(Calendar.HOUR_OF_DAY);//获取小时
int minute = c.get(Calendar.MINUTE);//获取分钟
int second = c.get(Calendar.SECOND);//获取秒
out.print("当前时间:"+year+":"+month+":"+date+":"+hour+":"+minute+":"+second+"<br>");
if(hour>=0&&hour<=12){//选择语句输出结果
out.print("上午好!");
}else if(hour>=13&&hour<=17){
out.print("下午好!");
}else if(hour>=18&&hour<=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整除
<%@ 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>
<title>My JSP 'second.jsp' starting page</title>
<%!boolean x(int year) {
if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
return true;
} else {
return false;
}
}%>
</head>
<!-- HTML注释 -->
<body>
<%
boolean y = x(2023);
out.print(y);
%>
</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>
<head>
<title>My JSP 'third.jsp' starting page</title>
</head>
<%--jsp注释 --%>
<body>
<%
for (int i = 1; i <= 5; i++) {
%>
<hr width="<%=i * 100%>px">
<%
}
%>
</body>
</html>
