jsp第二次作业

1.输出当前时间，并根据时间输出早上好，下午好，晚上好

<%@ page language="java" import="java.util.*" pageEncoding="UTF-8"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    
    <title>My JSP 'zy.jsp' starting page</title>
    

  </head>
  
  <body>
    <%
        Calendar c = Calendar.getInstance();
        int year = c.get(Calendar.YEAR);
        int month = c.get(Calendar.MONTH) + 1;
        int date = c.get(Calendar.DATE);
        int hour = c.get(Calendar.HOUR_OF_DAY);
        int minute = c.get(Calendar.MINUTE);
        int second = c.get(Calendar.SECOND);
        String x = "";   
        if (hour >= 0 && hour <= 12) { 
            x = "上午好！";
        } else if (hour >= 13 && hour <= 17) {
            x = "下午好！";
        } else if (hour >= 18 && hour <= 23) {
            x = "晚上好！";
        }
    %>
    <p>
        当前时间为：<%=year%>/<%=month%>/<%=date%>
        <%=hour%>:<%=minute%>:<%=second%><br>
    </p>
    <p><%=x%></p> <br>
  </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"%>

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
    
    <title>My JSP 'zy.jsp' starting page</title>
    <%!boolean a(int year) {
        if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
            return true;
        } else {
            return false;
        }
    }%>

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

　　

 

 

3.表达式+程序段   循环输出5条hr,长度分别为100px-500px

<%@ 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 'zy.jsp' starting page</title>
    

  </head>
  
  <body>
    <%
        for (int i = 1; i <= 5; i++) {
    %>
    <%--JSP注释 --%>
    <hr width="<%=i * 100%>px" size="5" color="green">
    <%
        }
    %>
  </body>
</html>

　　

 

posted @ 2022-03-20 18:27  吴显平  阅读(45)  评论(0)    收藏  举报