是我刚做的，这种东西大家都用得着。我把他贴出来大家看看。
<!-- File name:calendar.jsp -->
<!-- 显示任意年、月的日历，可选择不同的年、月。
author:wildfield -->
<%@ page language=\"java\" import=\"java.util.*\" %>
<%! String year;
String month;
%>
<% month=request.getParameter(\"month\");
year =request.getParameter(\"year\");
%>
<html>
<head>
<meta http-equiv=\"Content-Type\" content=\"text/html; charset=gb2312\">
<title>日</title>
<script Language=\"JavaScript\">
<!--
function changeMonth()
{
var mm=\"calendar.jsp?month=\"+document.sm.elements[0].selectedIndex+\"&year=\"
+<%=year%>;
window.open(mm,\"_self\");
}
//--></script>
</head>
<%! String days[]; %>
<%
days=new String[42];
for(int i=0;i<42;i++)
{
days=\"\";
}
%>
<%
Calendar thisMonth=Calendar.getInstance();
if(month!=null&&(!month.equals(\"null\")))
thisMonth.set(Calendar.MONTH, Integer.parseInt(month) );
if(year!=null&&(!year.equals(\"null\")))
thisMonth.set(Calendar.YEAR, Integer.parseInt(year) );
year=String.valueOf(thisMonth.get(Calendar.YEAR));
month=String.valueOf(thisMonth.get(Calendar.MONTH));
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);
}
%>
<body>
<FORM name=\"sm\" method=\"post\" action=\"calendar.jsp\">
<%=year%>年 <%=Integer.parseInt(month)+1%>月
<table border=\"0\" width=\"168\" height=\"81\">
<div align=center>
<tr>
<th width=\"25\" height=\"16\" bgcolor=\"#FFFF00\"><font color=\"red\">日</font>
</th>
<th width=\"25\" height=\"16\" bgcolor=\"#FFFF00\">一</th>
<th width=\"25\" height=\"16\" bgcolor=\"#FFFF00\">二</th>
<th width=\"25\" height=\"16\" bgcolor=\"#FFFF00\">三</th>
<th width=\"25\" height=\"16\" bgcolor=\"#FFFF00\">四</th>
<th width=\"25\" height=\"16\" bgcolor=\"#FFFF00\">五</th>
<th width=\"25\" height=\"16\" bgcolor=\"#FFFF00\"><font color=\"green\">六</fon
t></th>
</tr>
<% for(int j=0;j<6;j++) { %>
<tr>
<% for(int i=j*7;i<(j+1)*7;i++) { %>
<td width=\"15%\" height=\"16\" bgcolor=\"#C0C0C0\" valign=\"middle\" align=\"ce
nter\">
<a href=\"jump.jsp?year=<%=year%>&month=<%=Integer.parseInt(month)+1%>&d
ate=<%=days[i]%>\" target=\"main\"><%=days[i]%></a></td>
<% } %>
</tr>
<% } %>
</div>
</table>
<table border=\"0\" width=\"168\" height=\"20\">
<tr>
<td width=30%><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></td>
<td width=28%><input type=text name=\"year\" value=<%=year%> size=4 maxlength
=4></td>
<td>年</td>
<td width=28%><input type=submit value=\"提交\"></td>
</tr>
</table>
</FORM>
<script Language=\"JavaScript\">
<!--
document.sm.month.options.selectedIndex=<%=month%>;
//-->
</script>
</body>
</html>