JS获取本周周一，周末及获取任意时间的周一周末功能示例

2024-05-06 15:01:26

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本文实例讲述了JS获取本周周一，周末及获取任意时间的周一周末功能。分享给大家供大家参考，具体如下：

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>

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