ps:代码有参考别人的,非全部原创。已在正式项目上使用
import java.text.SimpleDateFormat; import java.util.Calendar; import java.util.Date; /** * 获取 当前年、半年、季度、月、日、小时 开始结束时间 */
private final SimpleDateFormat shortSdf; private final SimpleDateFormat longHourSdf; private final SimpleDateFormat longSdf; public RemindDateUtils(){ this.shortSdf = new SimpleDateFormat("yyyy-MM-dd"); this.longHourSdf = new SimpleDateFormat("yyyy-MM-dd HH"); this.longSdf = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss"); } /** * 获得本周的第一天,周一 * * @return */ public Date getCurrentWeekDayStartTime() { Calendar c = Calendar.getInstance(); try { int weekday = c.get(Calendar.DAY_OF_WEEK) - 2; c.add(Calendar.DATE, -weekday); c.setTime(longSdf.parse(shortSdf.format(c.getTime()) + " 00:00:00")); } catch (Exception e) { e.printStackTrace(); } return c.getTime(); } /** * 获得本周的最后一天,周日 * * @return */ public Date getCurrentWeekDayEndTime() { Calendar c = Calendar.getInstance(); try { int weekday = c.get(Calendar.DAY_OF_WEEK); c.add(Calendar.DATE, 8 - weekday); c.setTime(longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59")); } catch (Exception e) { e.printStackTrace(); } return c.getTime(); } /** * 获得本天的开始时间,即2012-01-01 00:00:00 * * @return */ public Date getCurrentDayStartTime() { Date now = new Date(); try { now = shortSdf.parse(shortSdf.format(now)); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 获得本天的结束时间,即2012-01-01 23:59:59 * * @return */ public Date getCurrentDayEndTime() { Date now = new Date(); try { now = longSdf.parse(shortSdf.format(now) + " 23:59:59"); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 获得本小时的开始时间,即2012-01-01 23:59:59 * * @return */ public Date getCurrentHourStartTime() { Date now = new Date(); try { now = longHourSdf.parse(longHourSdf.format(now)); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 获得本小时的结束时间,即2012-01-01 23:59:59 * * @return */ public Date getCurrentHourEndTime() { Date now = new Date(); try { now = longSdf.parse(longHourSdf.format(now) + ":59:59"); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 获得本月的开始时间,即2012-01-01 00:00:00 * * @return */ public Date getCurrentMonthStartTime() { Calendar c = Calendar.getInstance(); Date now = null; try { c.set(Calendar.DATE, 1); now = shortSdf.parse(shortSdf.format(c.getTime())); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 当前月的结束时间,即2012-01-31 23:59:59 * * @return */ public Date getCurrentMonthEndTime() { Calendar c = Calendar.getInstance(); Date now = null; try { c.set(Calendar.DATE, 1); c.add(Calendar.MONTH, 1); c.add(Calendar.DATE, -1); now = longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59"); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 当前年的开始时间,即2012-01-01 00:00:00 * * @return */ public Date getCurrentYearStartTime() { Calendar c = Calendar.getInstance(); Date now = null; try { c.set(Calendar.MONTH, 0); c.set(Calendar.DATE, 1); now = shortSdf.parse(shortSdf.format(c.getTime())); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 当前年的结束时间,即2012-12-31 23:59:59 * * @return */ public Date getCurrentYearEndTime() { Calendar c = Calendar.getInstance(); Date now = null; try { c.set(Calendar.MONTH, 11); c.set(Calendar.DATE, 31); now = longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59"); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 当前季度的开始时间,即2012-01-1 00:00:00 * * @return */ public Date getCurrentQuarterStartTime() { Calendar c = Calendar.getInstance(); int currentMonth = c.get(Calendar.MONTH) + 1; Date now = null; try { if (currentMonth >= 1 && currentMonth <= 3) c.set(Calendar.MONTH, 0); else if (currentMonth >= 4 && currentMonth <= 6) c.set(Calendar.MONTH, 3); else if (currentMonth >= 7 && currentMonth <= 9) c.set(Calendar.MONTH, 4); else if (currentMonth >= 10 && currentMonth <= 12) c.set(Calendar.MONTH, 9); c.set(Calendar.DATE, 1); now = longSdf.parse(shortSdf.format(c.getTime()) + " 00:00:00"); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 当前季度的结束时间,即2012-03-31 23:59:59 * * @return */ public Date getCurrentQuarterEndTime() { Calendar c = Calendar.getInstance(); int currentMonth = c.get(Calendar.MONTH) + 1; Date now = null; try { if (currentMonth >= 1 && currentMonth <= 3) { c.set(Calendar.MONTH, 2); c.set(Calendar.DATE, 31); } else if (currentMonth >= 4 && currentMonth <= 6) { c.set(Calendar.MONTH, 5); c.set(Calendar.DATE, 30); } else if (currentMonth >= 7 && currentMonth <= 9) { c.set(Calendar.MONTH, 8); c.set(Calendar.DATE, 30); } else if (currentMonth >= 10 && currentMonth <= 12) { c.set(Calendar.MONTH, 11); c.set(Calendar.DATE, 31); } now = longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59"); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 获取前/后半年的开始时间 * @return */ public Date getHalfYearStartTime(){ Calendar c = Calendar.getInstance(); int currentMonth = c.get(Calendar.MONTH) + 1; Date now = null; try { if (currentMonth >= 1 && currentMonth <= 6){ c.set(Calendar.MONTH, 0); }else if (currentMonth >= 7 && currentMonth <= 12){ c.set(Calendar.MONTH, 6); } c.set(Calendar.DATE, 1); now = longSdf.parse(shortSdf.format(c.getTime()) + " 00:00:00"); } catch (Exception e) { e.printStackTrace(); } return now; } /** * 获取前/后半年的结束时间 * @return */ public Date getHalfYearEndTime(){ Calendar c = Calendar.getInstance(); int currentMonth = c.get(Calendar.MONTH) + 1; Date now = null; try { if (currentMonth >= 1 && currentMonth <= 6){ c.set(Calendar.MONTH, 5); c.set(Calendar.DATE, 30); }else if (currentMonth >= 7 && currentMonth <= 12){ c.set(Calendar.MONTH, 11); c.set(Calendar.DATE, 31); } now = longSdf.parse(shortSdf.format(c.getTime()) + " 23:59:59"); } catch (Exception e) { e.printStackTrace(); } return now; } }
/** * 获取前一天日期 及星期 */ public class RemindDateUtils { private void initDate(){ String[] weekDays = {"周日","周一","周二","周三","周四","周五","周六"}; Calendar cal = Calendar.getInstance(); cal.add(Calendar.Date,-1); int i = cal.get(Calendar.DAY_OF_WEEK)-1; if(i<0){ i=0; } String yesterday = new SimpleDateFormate("yyyy年MM月dd日").format(cal.getTime());
String w = weekDays[i]; } }
PS:SimpleDateFormat是线程不安全的
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