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/** * 獲取上個月第一天 * @return */ public String getLastMonthFirstDayStr(){ SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); Calendar cal = Calendar.getInstance(); cal.setTime(new Date() ); //獲取當(dāng)前時間上一個月 cal.add(Calendar.MONTH, -1); //獲取上個月的第一天 cal.set(Calendar.DAY_OF_MONTH, cal.getActualMinimum(Calendar.DAY_OF_MONTH)); return df.format(cal.getTime()); } /** * 獲取上個月最后一天 * @return */ public String getLastMonthLastDayStr(){ SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); Calendar cal = Calendar.getInstance(); cal.setTime(new Date() ); //獲取當(dāng)前時間上一個月 cal.add(Calendar.MONTH, -1); //獲取上個月的最后一天 cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH)); return df.format(cal.getTime()); } /** * 獲取上周第一天 * @return */ public String getLastWeekFirstDayStr(){ SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); Calendar calWeek = Calendar.getInstance(); calWeek.setTime(new Date() ); int n1 = -1;// n為推遲的周數(shù),，-1上周,，0本周，1下周,，2下下周,，依次類推 calWeek.add(Calendar.DATE, n1 * 7); //上周周一 calWeek.set(Calendar.DAY_OF_WEEK, Calendar.MONDAY); return df.format(calWeek.getTime()); } /** * 獲取上周最后一天 * @return */ public String getLastWeekLastDayStr(){ SimpleDateFormat df = new SimpleDateFormat("yyyy-MM-dd"); Calendar calWeek = Calendar.getInstance(); calWeek.setTime(new Date() ); int n1 = -1;// n為推遲的周數(shù)，-1上周,，0本周,，1下周，2下下周，依次類推 calWeek.add(Calendar.DATE, n1 * 7); //上周周日 calWeek.set(Calendar.DAY_OF_WEEK, Calendar.SUNDAY); return df.format(calWeek.getTime()); } public static void main(String[] args) { System.out.println(numberFormateDown(2,0.0)); |
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來自： hongjing_z > 《Java》
