项目需要获取本周及任意一天的周一及周末 需格式化，示例代码如下：
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml"> <head> <meta http-equiv="Content-Type" content="text/html; charset=utf-8" /> <title>星期</title> <script type="text/javascript" language="javascript" > /** * @author zhuyangxing */ (function() { function util_date() { var _today=new Date(); this.today=_today; this.year=_today.getYear()+1900;//当前年份 this.Month_a=_today.getMonth(); this.Month=this.Month_a+1;//当前月份 this.day=_today.getDate();//当前日期 this.date=_today.getDay()==0?7:_today.getDay();//本周第几天 因系统会把周日作为第0天 this.Monday=""; this.Sunday=""; this.day_one=""; } Date.prototype.pattern=function(fmt) { var o = { "M+" : this.getMonth()+1, //月份 "d+" : this.getDate(), //日 "h+" : this.getHours()%12 == 0 ? 12 : this.getHours()%12, //小时 "H+" : this.getHours(), //小时 "m+" : this.getMinutes(), //分 "s+" : this.getSeconds(), //秒 "q+" : Math.floor((this.getMonth()+3)/3), //季度 "S" : this.getMilliseconds() //毫秒 }; var week = { "0" : "/u65e5", "1" : "/u4e00", "2" : "/u4e8c", "3" : "/u4e09", "4" : "/u56db", "5" : "/u4e94", "6" : "/u516d" }; if(/(y+)/.test(fmt)){ fmt=fmt.replace(RegExp.$1, (this.getFullYear()+"").substr(4 - RegExp.$1.length)); } if(/(E+)/.test(fmt)){ fmt=fmt.replace(RegExp.$1, ((RegExp.$1.length>1) ? (RegExp.$1.length>2 ? "/u661f/u671f" : "/u5468") : "")+week[this.getDay()+""]); } for(var k in o){ if(new RegExp("("+ k +")").test(fmt)){ fmt = fmt.replace(RegExp.$1, (RegExp.$1.length==1) ? (o[k]) : (("00"+ o[k]).substr((""+ o[k]).length))); } } return fmt; }, util_date.prototype = { newToday : function(_today){ this.today=_today; this.year=_today.getYear()+1900;//当前年份 this.Month_a=_today.getMonth(); this.Month=this.Month_a+1;//当前月份 this.day=_today.getDate();//当前日期 this.date=_today.getDay()==0?7:_today.getDay();//本周第几天 因系统会把周日作为第0天 this.Monday=""; this.Sunday=""; this.day_one=""; }, getMonday:function(){ if(this.Monday.length!=0){ return this.Monday; }else{ var _monday = new Date(this.year,this.Month_a,this.day-this.date+1); this.Monday = _monday; return _monday; } }, getSunday:function(){ if(this.Sunday.length!=0){ return this.Sunday; }else{ var _Sunday = new Date(this.year,this.Month_a,this.day-this.date+7); this.Sunday = _Sunday; return _Sunday; } }, getPreviousMonday:function(Monday){ var _monday = new Date(Monday.getYear()+1900,Monday.getMonth(),Monday.getDate()-7); return _monday; }, getPreviousSunday:function(Monday){ var _Sunday = new Date(Monday.getYear()+1900,Monday.getMonth(),Monday.getDate()-1); this.Sunday = _Sunday; return _Sunday; }, getNextMonday:function(Monday){ var _monday = new Date(Monday.getYear()+1900,Monday.getMonth(),Monday.getDate()+7); return _monday; }, getNextSunday:function(Monday){ var _Sunday = new Date(Monday.getYear()+1900,Monday.getMonth(),Monday.getDate()+13); this.Sunday = _Sunday; return _Sunday; } }; window.util_date = new util_date(); })(); document.write(window.util_date.getMonday().pattern("yyyy-MM-dd")); </script> </head> <body > </body> </html>
如果需要可直接在项目中引入该文件 使用window.util_date.getMonday().pattern("yyyy-MM-dd");可获得2017-1-24类型的字符串
window.util_date.newToday("2017-1-1");设置当前日期
PS：这里再为大家推荐几款时间及日期相关工具供大家参考使用：
更多关于JavaScript相关内容感兴趣的读者可查看本站专题：《JavaScript时间与日期操作技巧总结》、《JavaScript查找算法技巧总结》、《JavaScript错误与调试技巧总结》、《JavaScript数据结构与算法技巧总结》、《JavaScript遍历算法与技巧总结》及《JavaScript数学运算用法总结》