calTest-优快云博客

本文链接：https://blog.youkuaiyun.com/WdWheyr/article/details/84091654

本文介绍了一个使用JavaBean实现的日历功能，该功能能够显示当前月份的日历视图，并正确处理不同月份天数及闰年的情况。通过JavaBean封装了获取日期、星期和月份长度等方法，并结合JSP页面展示。

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JAVABEAN:

package com.calendar;
import java.util.Calendar;

public class test {
Calendar   calendar   =   Calendar.getInstance();
int year=calendar.get(Calendar.YEAR);
int month=calendar.get(Calendar.MONTH)+1;
int firstDay=getFirstDayOfMonth(year,month);
int day=getDay();
int monthlength=getMonthLength(year,month);
String[] s = new String[monthlength+firstDay];
int i=0,j=1;
public String[] getCalendar()
{
   System.out.println("date:"+day);
   for(i=firstDay;i<(firstDay+monthlength);i++)
    {
     if(j<=monthlength){  
                 s[i]=j+"";  
                 j++;  
             }  
             else{  
                 break;  
             }
    }
   return s;

}
private int getMonthLength(int y,int m)
{
   if(m==2)
    {
    if((y%4==0)&&(y%100!= 0)||(y%400==0))  
     monthlength=29;
    else
     monthlength=28;
    }
   else if(m==4||m==6||m==9||m==11)
    monthlength=30;
   else
    monthlength=31;
   return monthlength;
}

private int getDay()
{
   day=calendar.get(Calendar.DATE);
   return day;
}

private int getFirstDayOfMonth(int y,int m)
{
   calendar.set(y,m-1,1);  
      firstDay=calendar.get(Calendar.DAY_OF_WEEK);
      return firstDay;
}
}

页面部分：

<%@ page language="java" import="java.util.*" pageEncoding="utf-8"%>
<jsp:useBean   id="date"   scope="page"   class="com.calendar.test"   />  

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title>JSP日历</title>
</head>
<body>
<%
int j=1;
String ss[]= date.getCalendar();

%>
<table align="center" width="140">
<tr>
<td width="20">日</td>
<td width="20">一</td>
<td width="20">二</td>
<td width="20">三</td>
<td width="20">四</td>
<td width="20">五</td>
<td width="20">六</td>
</tr>
<%
for(int z=1;z<ss.length;z++)
System.out.println("ss["+z+"]="+ss[z]);
out.print("<tr>");
for(int i=1;i<ss.length;i++)
{
if(j<=7)
{
    if(ss[i]==null)   
      out.print("<td>"+" "+"</td>");   
    else
     out.print("<td>"+ss[i]+"</td>");     
    j++;
}
else
{
out.print("</tr><tr>");
i--;
j=1;
}
}
out.print("</tr>");
%>
</table>
</body>
</html>