jsp日历.小疑点

2012-07-28

jsp日历...小问题%@ page languagejava importjava.util.* pageEncodingutf-8%%String path

jsp日历...小问题
<%@ 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>
<base href="<%=basePath%>">

<title>日历</title>

<meta http-equiv="pragma" content="no-cache">
<meta http-equiv="cache-control" content="no-cache">
<meta http-equiv="expires" content="0">
<meta http-equiv="keywords" content="keyword1,keyword2,keyword3">
<meta http-equiv="description" content="This is my page">


<%!
String year;//年
String month;//月
String days[];//日历表数组
%>
<%
//获得客户表单参数
month = request.getParameter("month");
year = request.getParameter("year");
%>
<script type="text/javascript">
function changeMonth(){
var mm = "calendar.jsp?month="+document.sm.elements[0].selectedIndex+"&year="+<%=year%>;
window.open(mm,"_self");
}
</script>
</head>

<%
//每个月的日历为6行*7列
days = new String[42];
//日历表数组初始化
for(int i = 0 ; i<42;i++){
days[i]="";
}
//获得Calendar类的一个实例
Calendar thisMonth = Calendar.getInstance();
//设置月份
if(month !=null && (!month.equals("null"))){
thisMonth.set(Calendar.MONTH,Integer.parseInt(month));
}
//设置年份
if(year !=null && (!year.equals("null"))){
thisMonth.set(Calendar.YEAR,Integer.parseInt(year));
}
//重置年分和月份的变量
year = String.valueOf(thisMonth.get(Calendar.YEAR));
month = String.valueOf(thisMonth.get(Calendar.MONTH));
//设置每星期第一天为星期日
thisMonth.setFirstDayOfWeek(Calendar.SUNDAY);
//将日期设置为一个月的第一天
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);
}
//日历表数组值设置完毕
%>
<body>
<div align="center">
<form name="sm" method="post" action="calendar.jsp">
<%=year %>年 <%=Integer.parseInt(month)+1 %>月
<table border="0" height="90">

<TR>
<td width="25" headers="16" bgcolor="#ffff00"><font color="red">日</font></td>
<td width="25" headers="16" bgcolor="#ffff00">一</td>
<td width="25" headers="16" bgcolor="#ffff00">二</td>
<td width="25" headers="16" bgcolor="#ffff00">三</td>
<td width="25" headers="16" bgcolor="#ffff00">四</td>

<td width="25" headers="16" bgcolor="#ffff00">五</td>
<td width="25" headers="16" bgcolor="#ffff00"><font color="red">六</font></td>
</TR>

<% for(int j = 0 ; j<6 ; j++){ %>
<tr>
<%for(int i=j*7;i<(j+1)*7;i++){ %>
<td bgcolor="#c0c0c0" valign="middle" align="center">
<%=days[i] %>
</td>
<%} %>
</tr>
<%} %>
<tr>
<td bgcolor="#ffff00" colspan="7">
<select name="month" size="1" onChange="changeMonth()">
<option value="0">一月</option>
<option value="1">二月</option>
<option value="2">三月</option>
<option value="3">四月</option>
<option value="4">五月</option>
<option value="5">六月</option>
<option value="6">七月</option>
<option value="7">八月</option>
<option value="8">九月</option>
<option value="9">十月</option>
<option value="10">十一月</option>
<option value="11">十二月</option>
</select>
<input type="text" name="year" value="<%=year %>" size="4" maxlength="4">年
<input type="submit" value="提交">
</td>
</tr>
</table>
</form>
</div>
<script type="text/javascript">
document.sm.month.options.selectedIndex = <%=month%>;
</script>
</body>
</html>

<script type="text/javascript">
document.sm.month.options.selectedIndex = <%=month%>;
</script>
这句的作用我始终想不明白....它是在什么时候执行的呢,起的什么作用呢,虽然我上机实践过,但是还是不懂..各位...请帮帮忙吧

[解决办法]
用日历控件把，百度 my97date

http://www.my97.net/

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jsp日历.小疑点