1. 显示当前时间，并输出上午(0-12)好,下午好(13-17),晚上好(18-23)
<title>My JSP 'index.jsp' starting page</title></head>
<body>
<%
//java注释
Calendar y=Calendar.getInstance();
int year=y.get(Calendar.YEAR);
int month=y.get(Calendar.MONTH)+1;
int day=y.get(Calendar.DAY_OF_MONTH);
int hour=y.get(Calendar.HOUR_OF_DAY);
int minute=y.get(Calendar.MINUTE);
if(hour<12){
out.print("早上好~");}
else if(hour==12){
out.print("中午好~");
}
else{
out.print("下午好~");}
%>
<h2>
用户在<%=year %>/<%=month %>/<%=day %>
<%=hour %>:<%=minute %>使用浏览器
</h2>
</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
<title>My JSP 'index2.jsp' starting page</title>
</head>
<body>
<%!
boolean sf(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>
<head>
<!-- HTML注释 -->
<title>My JSP 'index1.jsp' starting page</title>
</head>
<body>
<%
boolean f=sf(2023);
out.print(f);
%>
</body>
</html>
3.表达式+程序段 循环输出5条<hr>,长度分别为100px-500px
<html>
<head>
<base href="<%=basePath%>">
<title>My JSP 'index2.jsp' starting page</title>
</head>
<body>
<%--jsp注释 --%>
<%
for (int i = 1; i <= 5; i++) {
%>
<hr width="<%=i * 100%>px">
<%
}
%>
</body>
</html>
