JS获取本周、本季度、本月、上月的开始日期、结束日期

Js代码

1. /**
2. * 获取本周、本季度、本月、上月的开始日期、结束日期
3. */
4. var now = new Date(); //当前日期
5. var nowDayOfWeek = now.getDay(); //今天本周的第几天
6. var nowDay = now.getDate(); //当前日
7. var nowMonth = now.getMonth(); //当前月
8. var nowYear = now.getYear(); //当前年
9. nowYear += (nowYear < 2000) ? 1900 : 0; //
11. var lastMonthDate = new Date(); //上月日期
12. lastMonthDate.setDate(1);
13. lastMonthDate.setMonth(lastMonthDate.getMonth()-1);
14. var lastYear = lastMonthDate.getYear();
15. var lastMonth = lastMonthDate.getMonth();
17. //格式化日期：yyyy-MM-dd
18. function formatDate(date) {
19. var myyear = date.getFullYear();
20. var mymonth = date.getMonth()+1;
21. var myweekday = date.getDate();
23. if(mymonth < 10){
24. mymonth = "0" + mymonth;
25. }
26. if(myweekday < 10){
27. myweekday = "0" + myweekday;
28. }
29. return (myyear+"-"+mymonth + "-" + myweekday);
30. }
32. //获得某月的天数
33. function getMonthDays(myMonth){
34. var monthStartDate = new Date(nowYear, myMonth, 1);
35. var monthEndDate = new Date(nowYear, myMonth + 1, 1);
36. var days = (monthEndDate - monthStartDate)/(1000 * 60 * 60 * 24);
37. return days;
38. }
40. //获得本季度的开始月份
41. function getQuarterStartMonth(){
42. var quarterStartMonth = 0;
43. if(nowMonth<3){
44. quarterStartMonth = 0;
45. }
46. if(2<nowMonth && nowMonth<6){
47. quarterStartMonth = 3;
48. }
49. if(5<nowMonth && nowMonth<9){
50. quarterStartMonth = 6;
51. }
52. if(nowMonth>8){
53. quarterStartMonth = 9;
54. }
55. return quarterStartMonth;
56. }
58. //获得本周的开始日期
59. function getWeekStartDate() {
60. var weekStartDate = new Date(nowYear, nowMonth, nowDay - nowDayOfWeek);
61. return formatDate(weekStartDate);
62. }
64. //获得本周的结束日期
65. function getWeekEndDate() {
66. var weekEndDate = new Date(nowYear, nowMonth, nowDay + (6 - nowDayOfWeek));
67. return formatDate(weekEndDate);
68. }
70. //获得本月的开始日期
71. function getMonthStartDate(){
72. var monthStartDate = new Date(nowYear, nowMonth, 1);
73. return formatDate(monthStartDate);
74. }
76. //获得本月的结束日期
77. function getMonthEndDate(){
78. var monthEndDate = new Date(nowYear, nowMonth, getMonthDays(nowMonth));
79. return formatDate(monthEndDate);
80. }
82. //获得上月开始时间
83. function getLastMonthStartDate(){
84. var lastMonthStartDate = new Date(nowYear, lastMonth, 1);
85. return formatDate(lastMonthStartDate);
86. }
88. //获得上月结束时间
89. function getLastMonthEndDate(){
90. var lastMonthEndDate = new Date(nowYear, lastMonth, getMonthDays(lastMonth));
91. return formatDate(lastMonthEndDate);
92. }
94. //获得本季度的开始日期
95. function getQuarterStartDate(){
97. var quarterStartDate = new Date(nowYear, getQuarterStartMonth(), 1);
98. return formatDate(quarterStartDate);
99. }
101. //或的本季度的结束日期
102. function getQuarterEndDate(){
103. var quarterEndMonth = getQuarterStartMonth() + 2;
104. var quarterStartDate = new Date(nowYear, quarterEndMonth, getMonthDays(quarterEndMonth));
105. return formatDate(quarterStartDate);
106. }