JAVA獲取日期:今天,昨天,本週,本月,本年
阿新 • • 發佈:2018-11-08
/** * 日期工具類 */ public class DateUtils { /** * 獲取今天 * @return String * */ public static String getToday(){ return new SimpleDateFormat("yyyy-MM-dd").format(new Date()); } /** * 獲取昨天 * @return String * */ public static String getYestoday(){ Calendar cal=Calendar.getInstance(); cal.add(Calendar.DATE,-1); Date time=cal.getTime(); return new SimpleDateFormat("yyyy-MM-dd").format(time); } /** * 獲取本月開始日期 * @return String * **/ public static String getMonthStart(){ Calendar cal=Calendar.getInstance(); cal.add(Calendar.MONTH, 0); cal.set(Calendar.DAY_OF_MONTH, 1); Date time=cal.getTime(); return new SimpleDateFormat("yyyy-MM-dd").format(time); } /** * 獲取本月最後一天 * @return String * **/ public static String getMonthEnd(){ Calendar cal=Calendar.getInstance(); cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH)); Date time=cal.getTime(); return new SimpleDateFormat("yyyy-MM-dd").format(time); } /** * 獲取本週的第一天 * @return String * **/ public static String getWeekStart(){ Calendar cal=Calendar.getInstance(); cal.add(Calendar.WEEK_OF_MONTH, 0); cal.set(Calendar.DAY_OF_WEEK, 2); Date time=cal.getTime(); return new SimpleDateFormat("yyyy-MM-dd").format(time); } /** * 獲取本週的最後一天 * @return String * **/ public static String getWeekEnd(){ Calendar cal=Calendar.getInstance(); cal.set(Calendar.DAY_OF_WEEK, cal.getActualMaximum(Calendar.DAY_OF_WEEK)); cal.add(Calendar.DAY_OF_WEEK, 1); Date time=cal.getTime(); return new SimpleDateFormat("yyyy-MM-dd").format(time); } /** * 獲取本年的第一天 * @return String * **/ public static String getYearStart(){ return new SimpleDateFormat("yyyy").format(new Date())+"-01-01"; } /** * 獲取本年的最後一天 * @return String * **/ public static String getYearEnd(){ Calendar calendar = Calendar.getInstance(); calendar.set(Calendar.MONTH,calendar.getActualMaximum(Calendar.MONTH)); calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH)); Date currYearLast = calendar.getTime(); return new SimpleDateFormat("yyyy-MM-dd").format(currYearLast); } }