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

 

posted @ 2022-03-10 20:05  33。  阅读(46)  评论(0)    收藏  举报