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)

<body>
    <%
        Date date = new Date();/* 获取方法 */
        int hour = date.getHours();
        int minute = date.getMinutes();
        int second = date.getSeconds();
        out.print("当前时间：" + hour + ":" + minute + ":" + second + "<br>");//获取时间
        if (hour >= 0 && hour <= 12) {
            out.print("早上好");
        } else if (hour >= 13 && hour <= 17) {
            out.print("中午好");
        } else if (hour >= 18 && hour <= 23) {
            out.print("晚上好");
        }
    %>
</body>

2. 使用声明方法,在页面调用该方法,判断2023是不是闰年

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <!-- 判断润年 -->
  <body>
     <%!String y(int year) {
        if (year % 4 == 0 && year % 100 != 0 || year % 400 == 0) {
            return "该年是闰年";
        } else {
            return "该年不是闰年";
        }
    }%>
    <%
        String year = y(2023);
        out.print(year);
    %>
</body>
</html>

3.表达式+程序段循环输出5条hr,长度分别为100px-500px

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
  <head>
  </head>
  <body>
     <%-- 循环输出--%>
    <%
        int i = 100;
    %>
 
    <%
        for (i = 100; i <= 500; i = i + 100) {
    %>
    <hr width="<%=i%>px">
    <%
        }
    %>
</body>
</html>