- import java.text.ParseException;
- import java.text.SimpleDateFormat;
- import java.util.Calendar;
- import java.util.Date;
- /**
- *
- * @ClassName: BeforeOrAfterDate
- *
- * @Description: 获得当前输入日期前(后)x天的日期
- * @author PineTree
- * @date 2014年12月29日 下午3:52:46
- * @version
- */
- public class BeforeOrAfterDate {
- /**
- *
- * 查询当前日期前(后)x天的日期
- *
- * @param date 当前日期
- * @param day 天数(如果day数为负数,说明是此日期前的天数)
- * @return yyyy-MM-dd
- */
- public String beforNumDay(Date date, int day) {
- Calendar c = Calendar.getInstance();
- c.setTime(date);
- c.add(Calendar.DAY_OF_YEAR, day);
- return new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());
- }
- /**
- *
- * 查询当前日期前(后)x天的日期
- *
- * @param date 当前日期
- * @param day 天数(如果day数为负数,说明是此日期前的天数)
- * @return yyyyMMdd
- */
- public String beforNumberDay(Date date, int day) {
- Calendar c = Calendar.getInstance();
- c.setTime(date);
- c.add(Calendar.DAY_OF_YEAR, day);
- return new SimpleDateFormat("yyyyMMdd").format(c.getTime());
- }
- /**
- * 查询当前日期前(后)x天的日期
- *
- * @param millis 当前日期毫秒数
- * @param day 天数(如果day数为负数,说明是此日期前的天数)
- * @return long 毫秒数只显示到天,时间全为0
- * @throws ParseException
- */
- public long beforDateNum(long millis, int day) throws ParseException {
- Calendar c = Calendar.getInstance();
- c.setTimeInMillis(millis);
- c.add(Calendar.DAY_OF_YEAR, day);
- SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
- Date date = new Date(c.getTimeInMillis());
- Date newDate = sdf.parse(sdf.format(date));
- return newDate.getTime();
- }
- /**
- * 查询当前日期前(后)x天的日期
- *
- * @param millis 当前日期毫秒数
- * @param day 天数(如果day数为负数,说明是此日期前的天数)
- * @return yyyy-MM-dd
- */
- public String beforLongDate(long millis, int day) {
- Calendar c = Calendar.getInstance();
- c.setTimeInMillis(millis);
- c.add(Calendar.DAY_OF_YEAR, day);
- SimpleDateFormat sdf = new SimpleDateFormat("yyyy-MM-dd");
- Date date = new Date(c.getTimeInMillis());
- return sdf.format(date);
- }
- public static void main(String[] args) {
- try{
- BeforeOrAfterDate bd = new BeforeOrAfterDate();
- long nowDate = System.currentTimeMillis();
- System.out.println("nowDate = " + nowDate);
- long beforDate = bd.beforDateNum(nowDate, 3);
- System.out.println("beforDate = " + beforDate);
- Date date = new Date(beforDate);
- System.out.println("毫秒值结果日期 = " + date.toLocaleString());
- System.out.println("yyyyMMdd结果日期 = " + bd.beforNumberDay(new Date(nowDate), 3));
- System.out.println("yyyy-MM-dd结果日期 = " + bd.beforNumDay(new Date(nowDate), 3));
- System.out.println("毫秒值获取日期结果 = " + bd.beforLongDate(nowDate, 3));
- }catch(Exception e) {
- e.printStackTrace();
- }
- }
- }
来源: http://www.phpxs.com/code/1002385/