一个JSP+JAVABEANS实现的WEB日历程序，主要使用了Calendar类！
monthBean.java
package test;
import java.text.DateFormat;
import java.text.DateFormatSymbols;
import java.util.*;
public class monthBean {
public final static int[]DAYSINMONTH={31,28,31,30,31,30,31,31,30,31,30,31};
public String []monthNames=null;
protected DateFormatSymbols symbols=null;
protected Calendar cal=Calendar.getInstance();
protected int today=cal.get(Calendar.DAY_OF_MONTH);
protected int month=cal.get(Calendar.MONTH);
protected int year=cal.get(Calendar.YEAR);
public monthBean() {
symbols=new DateFormatSymbols();
monthNames=symbols.getMonths();
}
public void setMonth(int monthArg){
this.month=monthArg;
}
public void setYear(int yearArg) {
this.year=yearArg;
}
public void setMonth(String monthArg) {
try{
int month=Integer.parseInt(monthArg);
setMonth(month);
}catch(Exception exc){
}
}
public void setYear(String yearArg){
try{
int year=Integer.parseInt(yearArg);
setYear(year); }catch(Exception exc){
}
}
public String getMonthName() {
return monthNames[cal.get(Calendar.MONTH)];
}
public int getToday(){
return today;
}
public int getStartCell() {
Calendar beginOfMonth=Calendar.getInstance();
beginOfMonth.set(year,month,0);
return beginOfMonth.get(Calendar.DAY_OF_WEEK);
}
public int getEndCell() {
cal.set(year,month,1); int endCell=DAYSINMONTH[month]+getStartCell()-1;
if(month==Calendar.FEBRUARY && ((GregorianCalendar)cal).isLeapYear(year)){
endCell++;
}
return endCell;
}
public void update() {
cal.set(this.year,this.month,1);
}
public String getDayName(int day,boolean longFormat) {
if(longFormat)
return symbols.getWeekdays()[day];
return symbols.getShortWeekdays()[day];
}
}
month.jsp
<%@ page contentType="text/html;charset=gb2312" %>
<%@ page import="test.monthBean"%>
<jsp:useBean id="cal" class="test.monthBean" scope="request"/>
<%
int today=cal.getToday();
%>
<html>
<head>
<title>
日历
</title>
</head>
<body bgcolor="silver" ><br><br><br>
<table border="1" align="center" width="40%" height="100"><tr bgcolor="silver" >
<td colspan="7"> <font size="+2">
<%=cal.getMonthName()%>
</font></td></tr>
<tr bgcolor="black" align="center">
<% for(int i=1;i<8;i++) {
out.print("<td width=\"70\">");
out.print("<font size\"-1\" color=\"white\">");
out.print(cal.getDayName(i,true));
out.print("</front> </td>");
} %>
</tr>
<% int startcell=cal.getStartCell();
int endcell=cal.getEndCell();
for(int cellNo=0,day=1;cellNo<42;cellNo++) {
if(cellNo%7==0) { out.print("<tr>"); }
out.print("<td valign=top height=57");
if(cellNo<startcell||cellNo>endcell) {
out.print(" bgcolor=\"gray\">"); }
else {
if(day==today){ //如果为当前日期，背景色设为绿色
out.print(" bgcolor=\"green\">");
}
else
out.print(">");
%>
<%=day%>
<%
day++;
}
out.println("</td>");
if(cellNo+1%7==0) {
out.print("</tr>"); }
} //end for loop
%>
</table>
</body>
</html>