jsp日历问题

hniyani 2010-11-24 06:14:21

if(hour<10) hour="0"+hour;
if(minu<10) minu="0"+minu;
if(sec<10) sec="0"+sec;
求解释？？？？

<%@ page language="java" contentType="text/html; charset=gb2312" %>

<%@ page language="java" import="java.util.*" %>

<%

    String[] weekdays={"","日","一","二","三","四","五","六"};

    String[] days=new String[42];

    for(int i=0;i<42;i++)

    	days[i]="";



    GregorianCalendar currentDay = new GregorianCalendar();

    int year= currentDay.get(Calendar.YEAR);

    int month=currentDay.get(Calendar.MONTH);

    int today=currentDay.get(Calendar.DAY_OF_MONTH);

    int weekday=currentDay.get(Calendar.DAY_OF_WEEK);

    

    String now=year+"年"+(month+1)+"月"+today+"日"+" 星期"+weekdays[weekday];

    

    Calendar thisMonth=Calendar.getInstance();

    thisMonth.set(Calendar.MONTH, month );

    thisMonth.set(Calendar.YEAR, year );

    thisMonth.setFirstDayOfWeek(Calendar.SUNDAY);

    thisMonth.set(Calendar.DAY_OF_MONTH,1);

    

    int firstIndex=thisMonth.get(Calendar.DAY_OF_WEEK)-1;

    int maxIndex=thisMonth.getActualMaximum(Calendar.DAY_OF_MONTH);

    for(int i=0;i<maxIndex;i++){

        days[firstIndex+i]=String.valueOf(i+1);

    }

%>



<html>

    <head>

      <title>简易万年历</title>

      <link type="text/css" rel="stylesheet" href="<s2:url value='css/style.css'/>">

      <script type="text/javascript">

        function showTime(showWhere){

            var now=new Date();

	        var hour=now.getHours();

	        var minu=now.getMinutes();

	        var sec=now.getSeconds();

         

            if(hour<10) hour="0"+hour;

         	if(minu<10) minu="0"+minu;

         	if(sec<10) sec="0"+sec;

         	

         	showWhere.value=hour+":"+minu+":"+sec;

            setTimeout("showTime(time)",1000)

        }

      </script>

    </head>

    <body onload="showTime(time)">

        <table width="210" border="0" align="center" cellspacing="1" >            

            <tr height="25"><td colspan="7" align="center" style="border:0 solid"><%=now%> <input type="text" style="border:0;background-color:#F9F9F9" disable="true" id="time" size="9"></td></tr>

            <tr height="25" bgcolor="#F0F0F0" align="center">

                <td style="border:1 solid">日</td>

                <td style="border:1 solid">一</td>

                <td style="border:1 solid">二</td>

                <td style="border:1 solid">三</td>

                <td style="border:1 solid">四</td>

                <td style="border:1 solid">五</td>

                <td style="border:1 solid">六</td>

            </tr>

            <tr height="4"><td colspan="7"></td></tr>

            <% for(int j=0;j<6;j++) { %>

            <tr>

                <% 

                  for(int i=j*7;i<(j+1)*7;i++) { 

                      if((i-firstIndex+1)==today){%>    

                      <td width="30" height="23" align="center" bgcolor="gray" style="border:1 solid"><font color="#FFFFFF"><b><%=days[i]%></b></font></td>

                <%    }else{ %>

                      <td width="30" height="23" align="center" style="border:1 solid"><%=days[i]%></td>

                <%    }

                  }%>

            </tr>

            <% } %>

            <tr height="10"><td colspan="7"></td></tr>

        </table>

    </body>

</html>