### 获取近一周时间 ```js var end = new Date(); var year = end.getFullYear(); var month = end.getMonth() + 1;//0-11表示1-12月 var day = end.getDate(); var dateObj = {}; dateObj.end = year + '-' + month + '-' + day; if (day - 7 <= 0) { //如果在当月7日之前 var startMonthDay = new Date(year, (parseInt(month) - 1), 0).getDate(); //1周前所在月的总天数 if (month - 1 <= 0) { //如果在当年的1月份 dateObj.start = (year - 1) + '-' + 12 + '-' + (31 - (7 - day)); } else { dateObj.start = year + '-' + (month - 1) + '-' + (startMonthDay - (7 - day)); } } else { dateObj.start = year + '-' + month + '-' + (day - 7); } console.log(JSON.stringify(dateObj)) 1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17. ``` ### 获取近一个月时间 ```js var end = new Date(); var year = end.getFullYear(); var month = end.getMonth() + 1;//0-11表示1-12月 var day = end.getDate(); var dateObj = {}; dateObj.end = year + '-' + month + '-' + day; var endMonthDay = new Date(year, month, 0).getDate(); //当前月的总天数 if(month - 1 <= 0){ //如果是1月，年数往前推一年
　　　　 dateObj.start = (year - 1) + '-' + 12 + '-' + day; }else{ var startMonthDay = new Date(year, (parseInt(month) - 1), 0).getDate(); if(startMonthDay < day){ //1个月前所在月的总天数小于现在的天日期 if(day < endMonthDay){ //当前天日期小于当前月总天数 dateObj.start = year + '-' + (month - 1) + '-' + (startMonthDay - (endMonthDay - day)); }else{ dateObj.start = year + '-' + (month - 1) + '-' + startMonthDay; } }else{ dateObj.start = year + '-' + (month - 1) + '-' + day; } } console.log(JSON.stringify(dateObj)) 1.2.3.4.5.6.7.8.9.10.11.12.13.14.15.16.17.18.19.20.21.22. ``` ### 获取近三个月时间 ```js var end = new Date(); var year = end.getFullYear(); var month = end.getMonth() + 1;//0-11表示1-12月 var day = end.getDate(); var dateObj = {}; dateObj.end = year + '-' + month + '-' + day; var endMonthDay = new Date(year, month, 0).getDate(); //当前月的总天数 if(month - 3 <= 0){ //如果是1、2、3月，年数往前推一年 var start3MonthDay = new Date((year - 1), (12 - (3 - parseInt(month))), 0).getDate(); //3个月前所在月的总天数 if(start3MonthDay < day){ //3个月前所在月的总天数小于现在的天日期 dateObj.start = (year - 1) + '-' + (12 - (3 - month)) + '-' + start3MonthDay; }else{ dateObj.start = (year - 1) + '-' + (12 - (3 - month)) + '-' + day; } }else{ var start3MonthDay = new Date(year, (parseInt(month) - 3), 0).getDate(); //3个月前所在月的总天数 if(start3MonthDay < day){ //3个月前所在月的总天数小于现在的天日期 if(day < endMonthDay){ //当前天日期小于当前月总天数,2月份比较特殊的月份 dateObj.start = year + '-' + (month - 3) + '-' + (start3MonthDay - (endMonthDay - day)); }else{ dateObj.start = year + '-' + (month - 3) + '-' + start3MonthDay; } }else{ dateObj.start = year + '-' + (month - 3) + '-' + day; } } console.log(JSON.stringify(dateObj)) ```