@Test public void dateTest() { Date today = new Date(); for(int i=0;i<10;i++) { today = yesterday(today); System.out.println(today); } System.out.println("------------"); for(int i=0;i<10;i++) { today = tomorrow(today); System.out.println(today); } } /** * 返回昨天 * @param today * @return */ public Date yesterday(Date today) { Calendar calendar = Calendar.getInstance(); calendar.setTime(today); calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) - 1); return calendar.getTime(); } /** * 返回明天 * @param today * @return */ public Date tomorrow(Date today) { Calendar calendar = Calendar.getInstance(); calendar.setTime(today); calendar.set(Calendar.DATE, calendar.get(Calendar.DATE) + 1); return calendar.getTime(); }