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JavaÖÐÌṩÁ˷ḻµÄÈÕÆÚ±íʾ·½Ê½¡£ÆäÖаüÀ¨Date¡¢Timestamp¡¢Calendar¡¢GregorianCalendarÀà¡£GregorianCalendarÀàÖÐÌṩÁËÓÃÓÚ¼ÆËãÈÕÆÚµÄadd()·½·¨£¬¿ÉÒԺܷ½±ãµØ¼ÆËãÈô¸ÉÄê¡¢Ô¡¢ÈÕºóµÄÈÕÆÚ¡£

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package testjava;

import java.sql.Timestamp;
import java.text.SimpleDateFormat;
import java.util.Date;
import java.util.GregorianCalendar;

public class DateTest {

public static void main(String[] args) {

SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd");
DateTest test = new DateTest();
//Date
Date currentDate = new Date();
System.out.println("µ±Ç°ÈÕÆÚÊÇ£º" + df.format(currentDate));
System.out.println("Ò»ÖܺóµÄÈÕÆÚÊÇ£º" + df.format(test.nextWeek(currentDate)));
System.out.println("Ò»ÔºóµÄÈÕÆÚÊÇ£º" + df.format(test.nextMonth(currentDate)));
System.out.println("Ò»ÄêºóµÄÈÕÆÚÊÇ£º" + df.format(test.nextYear(currentDate)));
//Timestamp
Timestamp currentTime = new Timestamp(System.currentTimeMillis());
System.out.println("µ±Ç°ÈÕÆÚÊÇ£º" + df.format(currentTime));
System.out.println("Ò»ÖܺóµÄÈÕÆÚÊÇ£º" + df.format(test.nextWeek(currentTime)));
System.out.println("Ò»ÔºóµÄÈÕÆÚÊÇ£º" + df.format(test.nextMonth(currentTime)));
System.out.println("Ò»ÄêºóµÄÈÕÆÚÊÇ£º" + df.format(test.nextYear(currentTime)));

//ÁíÒ»ÖÖ¼ÆË㷽ʽ£¬ÕâÖÖ·½Ê½¼ÆËãÔºÍÄêµÄÈÕÆÚ±È½ÏÀ§ÄÑ
Timestamp nextTime = new Timestamp(currentTime.getTime() + 7 * 24 * 60 * 60 * 1000);
System.out.println("µ±Ç°ÈÕÆÚÊÇ£º" + df.format(currentTime));
System.out.println("Ò»ÖܺóµÄÈÕÆÚÊÇ£º" + df.format(nextTime));

}

//»ñÈ¡ÏÂÒ»ÖܵÄÈÕÆÚ
public Date nextWeek(Date currentDate) {
GregorianCalendar cal = new GregorianCalendar();
cal.setTime(currentDate);
cal.add(GregorianCalendar.DATE, 7);//ÔÚÈÕÆÚÉϼÓ7Ìì
return cal.getTime();
}

//»ñÈ¡±¾ÖÜÈÕµÄÈÕÆÚ
public Date getSunday(Date monday) {
GregorianCalendar cal = new GregorianCalendar();
cal.setTime(monday);
cal.add(GregorianCalendar.DATE, 6);//ÔÚÈÕÆÚÉϼÓ6Ìì
return cal.getTime();
}

//»ñÈ¡ÏÂÒ»ÔµÄÈÕÆÚ
public Date nextMo


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Calendar time=Calendar.getInstance();
time.clear();
time.set(Calendar.YEAR,year); //year Ϊ int
time.set(Calendar.MONTH,i-1);//×¢Òâ,Calendar¶ÔÏóĬÈÏÒ»ÔÂΪ0
int day=time.getActualMaximum(Calendar.DAY_OF_MONTH);//±¾Ô·ݵÄÌìÊý
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