1. /**
    2. * 获取日期
    3. * 格式： 2020-10-12
    4. */
    5. private static String getDateToday(int period){
    6. Calendar calendar = Calendar.getInstance();
    7. calendar.add(Calendar.DATE,period);
    8. return new SimpleDateFormat("yyyy-MM-dd").format(calendar.getTime());
    9. }
    11. /**
    12.  * 获取周的第一天
    13.  * @param period 期数
    14.  * @return String
    15.  * **/
    16. private static String getWeekStart(int period){
    17.     Calendar cal=Calendar.getInstance();
    18.     cal.add(Calendar.WEEK_OF_MONTH, period);
    19.     cal.set(Calendar.DAY_OF_WEEK, 2);
    20.     return new SimpleDateFormat("yyyy-MM-dd").format(cal.getTime());
    21. }
    23. /**
    24.  * 获取周的最后一天
    25.  * 期次
    26.  * @return String
    27.  * **/
    28. private static String getWeekEnd(int period){
    29.     Calendar cal=Calendar.getInstance();
    30.     cal.add(Calendar.WEEK_OF_MONTH, period);
    31.     cal.set(Calendar.DAY_OF_WEEK, cal.getActualMaximum(Calendar.DAY_OF_WEEK));
    32.     cal.add(Calendar.DAY_OF_WEEK, 1);
    33.     return new SimpleDateFormat("yyyy-MM-dd").format(cal.getTime());
    34. }
    36. /**
    37.  * 获取本月开始日期
    38.  * @return String
    39.  * **/
    40. public static String getMonthStart(int period){
    41.     Calendar cal=Calendar.getInstance();
    42.     cal.add(Calendar.MONTH, period);
    43.     cal.set(Calendar.DAY_OF_MONTH, 1);
    44.     return new SimpleDateFormat("yyyy-MM-dd").format(cal.getTime());
    45. }
    47. /**
    48.  * 获取本月最后一天
    49.  * @return String
    50.  * **/
    51. public static String getMonthEnd(int period){
    52.     Calendar cal=Calendar.getInstance();
    53.     cal.add(Calendar.MONTH, period);
    54.     cal.set(Calendar.DAY_OF_MONTH, cal.getActualMaximum(Calendar.DAY_OF_MONTH));
    55.     return new SimpleDateFormat("yyyy-MM-dd").format(cal.getTime());
    56. }
    58. /**
    59.  * 获取季度开始日期
    60.  * @return
    61.  */
    62. private static String getSeasonStart(int period) {
    63.     Calendar calendar = Calendar.getInstance();
    64.     int month = calendar.get(Calendar.MONTH) + 1+(period*3);
    65.     //根据月份获取所在季度
    66.     int quarter = new Double(Math.ceil(month / 3.0D)).intValue();
    67.     //所在季度的第一个月
    68.     int startMonth = quarter * 3 - 2;
    69.     Calendar a = Calendar.getInstance();
    70.     a.set(Calendar.YEAR, calendar.get(Calendar.YEAR));
    71.     a.set(Calendar.MONTH, startMonth - 1);
    72.     a.set(Calendar.DATE, 1);
    73.     return new SimpleDateFormat("yyyy-MM-dd").format(a.getTime());
    74. }
    76. /**
    77.  * 获取季度开始日期
    78.  * @return
    79.  */
    80. private static String getSeasonEnd(int period) {
    81.     Calendar calendar = Calendar.getInstance();
    82.     int month = calendar.get(Calendar.MONTH) + 1+(period*3);
    83.     //根据月份获取所在季度
    84.     int quarter = new Double(Math.ceil(month / 3.0D)).intValue();
    85.     //所在季度的第一个月
    86.     int startMonth = quarter * 3;
    87.     Calendar a = Calendar.getInstance();
    88.     a.set(Calendar.YEAR, calendar.get(Calendar.YEAR));
    89.     a.set(Calendar.MONTH, startMonth - 1);
    90.     a.set(Calendar.DATE, 1);
    91.     a.set(Calendar.DAY_OF_MONTH, a.getActualMaximum(Calendar.DAY_OF_MONTH));
    92.     return new SimpleDateFormat("yyyy-MM-dd").format(a.getTime());
    93. }
    95. /**
    96.  * 获取年的第一天
    97.  * @return String
    98.  * **/
    99. public static String getYearStart(int period){
    100.     Calendar cal = Calendar.getInstance();
    101.     cal.add(Calendar.YEAR, period);
    102.     return new SimpleDateFormat("yyyy").format(cal.getTime())+"-01-01";
    103. }
    105. /**
    106.  * 获取本年的最后一天
    107.  * @return String
    108.  * **/
    109. public static String getYearEnd(int period){
    110.     Calendar calendar = Calendar.getInstance();
    111.     calendar.add(Calendar.YEAR, period);
    112.     calendar.set(Calendar.MONTH,calendar.getActualMaximum(Calendar.MONTH));
    113.     calendar.set(Calendar.DAY_OF_MONTH,calendar.getActualMaximum(Calendar.DAY_OF_MONTH));
    114.     return new SimpleDateFormat("yyyy-MM-dd").format(calendar.getTime());
    115. }
    117. /**
    118.  * 获取后半年的开始时间
    119.  */
    120. private static String getHalfYearStart(){
    121.     Calendar c = Calendar.getInstance();
    122.     c.set(Calendar.MONTH, 6);
    123.     c.set(Calendar.DATE, 1);
    124.     return new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());
    125. }
    127. /**
    128.  * 获取前半年的结束时间
    129.  */
    130. private static String getHalfYearEnd(){
    131.     Calendar c = Calendar.getInstance();
    132.     c.set(Calendar.MONTH, 5);
    133.     c.set(Calendar.DATE, 30);
    134.     return new SimpleDateFormat("yyyy-MM-dd").format(c.getTime());
    135. }