1.日期打印
需要用到的java类
import java.util.Calendar;
import java.text.DateFormatSymbols;
import java.util.GregorianCalendar;
主要代码
GregorianCalendar gre = new GregorianCalendar();
//获得当前日期
int today = gre.get(Calendar.DAY_OF_MONTH);
//获得当前月份
int month = gre.get(Calendar.MONTH);
//设置这个月第一天
gre.set(Calendar.DAY_OF_MONTH, 1);
//获得第一天是周几
int weekDay = gre.get(Calendar.DAY_OF_WEEK);
System.out.println("gre="+gre);
System.out.println("today="+today+"\n"+"month="+month+"\n"+"week="+weekDay);
//获得这周第一天星期几
int firstdayofWeek = gre.getFirstDayOfWeek();
System.out.println("firstdayofWeek="+firstdayofWeek);
//获取需要打印空格的数量
int indent= 0;
while(firstdayofWeek != weekDay)
{
indent++;
gre.add(Calendar.DAY_OF_MONTH, -1);
weekDay = gre.get(Calendar.DAY_OF_WEEK);
}
//获得星期
String[] weeksStrs = new DateFormatSymbols().getShortWeekdays();
//打印星期
do
{
String week = weeksStrs[weekDay];
System.out.print(week);
gre.add(Calendar.DAY_OF_MONTH, 1);
weekDay = gre.get(Calendar.DAY_OF_WEEK);
}
while(weekDay != firstdayofWeek);
//换行
System.out.println("");
for (int i = 0;i<indent;i++)
{
System.out.print（“”）；
}
//设置这个月第一天
gre.set(Calendar.DAY_OF_MONTH, 1);
do
{
int day = gre.get(Calendar.DAY_OF_MONTH);
System.out.printf("%3d", day);
if(day == today)
{
System.out.print("*");
}
gre.add(Calendar.DAY_OF_MONTH, 1);
weekDay = gre.get(Calendar.DAY_OF_WEEK);
if(weekDay == firstdayofWeek)
{
System.out.println("");
}
}
while(gre.get(Calendar.MONTH) == month);
if(weekDay != firstdayofWeek)
{
System.out.println("");
}
结果
星期日星期一星期二星期三星期四星期五星期六
1 2 3 4 5 6 7
8 9 10 11 12 13 14
15 16 17 18 19 20 21
22 23 24 25 26 27 28
29* 30 31
