JAVA第二次作业
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"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>My JSP 'index.jsp' starting page</title>
</head>
<body>
<%
Date d=new Date();
int h=d.getHours();
int m=d.getMinutes();
int s=d.getSeconds();
out.print("当前时间："+h+":"+m+":"+s+"<br>");
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
<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<%!
int i = 0;
int j = 0;%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<%!
boolean isRun(int year){
if(year%4==0&&year%100!=0||year%400==0){
return true;
}
return false;
} %>
<html>
<head>
<title>
My JSP 'index.jsp' starting page
</title>
</head>
<body>
<%
boolean f=isRun(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
<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 'index.jsp' starting page</title> </head> <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
