//日期转时间戳

functiongetUnixTime(dateStr){var newstr = dateStr.replace(/-/g,'/');var date = newDate(newstr);var time_str =date.getTime().toString();return time_str.substr(0, 10);

}//时间戳转日期,falg:true表示只要年月日,part: year month date

functiontoDate(number,flag,part) {var n =number;var date = new Date(parseInt(n) * 1000);var y =date.getFullYear();var m = date.getMonth() + 1;

m= m < 10 ? ('0' +m) : m;var d =date.getDate();

d= d < 10 ? ('0' +d) : d;var h =date.getHours();

h= h < 10 ? ('0' +h) : h;var minute =date.getMinutes();var second =date.getSeconds();

minute= minute < 10 ? ('0' +minute) : minute;

second= second < 10 ? ('0' +second) : second;if(flag){if(part == "year"){returny;

}else if(part == "month"){returnm;

}else if(part == "date"){returnn;

}return y + '-' + m + '-' +d;

}return y + '-' + m + '-' + d + ' ' + h + ':' + minute+':' +second;

}//判断两个日期时间戳相差多少天,参数为时间戳

functiondateCompare(dateTimeStamp1,dateTimeStamp2){var dayNum = 0;if(dateTimeStamp1 >dateTimeStamp2){

dayNum= Math.floor((dateTimeStamp1 - dateTimeStamp2) / 86400);

}else{

dayNum= Math.floor((dateTimeStamp2 - dateTimeStamp1) / 86400);

}returndayNum;

}//判断过去某个时间点到当前时间是否达到多少天,可以用来定期清理缓存

functiondatePassDays(dateTimeStamp,days){var now = getUnixTime(formatDateThis(newDate()));var diffValue = now -dateTimeStamp;var limitTime = days * 86400;if(diffValue >=limitTime){return true;

}return false;

}//当前日期加减天数,falg:true表示只要年月日

functionmathChangeDate(date,method,days,flag){//method:'+' || '-'

//ios不解析带'-'的日期格式，要转成'/'，不然Nan，切记

var dateVal = date.replace(/-/g, '/');var timestamp =Date.parse(dateVal);if(method == '+'){

timestamp= timestamp / 1000 + 24 * 60 * 60 *days;

}else if (method == '-'){

timestamp= timestamp / 1000 - 24 * 60 * 60 *days;

}returntoDate(timestamp,flag);

}//时间戳转换具体时间描述(传入数值型时间戳)

functiongetDateDiff(dateTimeStamp) {var result = '';var minute = 1 * 60;var hour = minute * 60;var day = hour * 24;var halfamonth = day * 15;var month = day * 30;var now = getUnixTime(formatDateThis(new Date()));//有些特殊 不能使用 new Date()

var diffValue = now -dateTimeStamp;if (diffValue < 0) { return; }var monthC = diffValue /month;var weekC = diffValue / (7 *day);var dayC = diffValue /day;var hourC = diffValue /hour;var minC = diffValue /minute;if (monthC >= 1) {

result= "" + parseInt(monthC) + "月前";

}else if (weekC >= 1) {

result= "" + parseInt(weekC) + "周前";

}else if (dayC >= 1) {

result= "" + parseInt(dayC) + "天前";

}else if (hourC >= 1) {

result= "" + parseInt(hourC) + "小时前";

}else if (minC >= 1) {

result= "" + parseInt(minC) + "分钟前";

}elseresult= "刚刚";returnresult;

};//获取当前年份，月份， 例： getCurrentTime(new Date(),"year")

const getCurrentTime = (date,method) =>{if(method == "year"){returndate.getFullYear();

}else if(method == "month"){return date.getMonth() + 1;

}returndate;

}//获取当前服务器时间,参数直接用 new Date() 就可以了

const formatDateThis = date =>{

const year=date.getFullYear();

const month= date.getMonth() + 1;

const day=date.getDate();

const hour=date.getHours();

const minute=date.getMinutes();

const second=date.getSeconds();return [year, month, day].map(formatNumber).join('-') +' '+ [hour, minute, second].map(formatNumber).join(':');

}

const formatTime= date =>{

const year=date.getFullYear();

const month= date.getMonth() + 1;

const day=date.getDate();return [year, month, day].map(formatNumber).join('-');

}

const formatTimes= time =>{

const hour=time.getHours();

const minute=time.getMinutes();

const second=time.getSeconds();return [hour, minute,second].map(formatNumber).join(':');

}//补0

const formatNumber = n =>{

n=n.toString();return n[1] ? n : '0' +n;

}//比较两个时间大小(格式参考yyyy-mm-dd hh:mm:ss)

functioncompareTime(startTime,endTime){//结束时间大于开始时间就是true ， 反之则为 false

var sn = getUnixTime(startTime) * 1;var en = getUnixTime(endTime) * 1;if(en >sn){return true;

}return false;

}

module.exports={

dateCompare:dateCompare,

getCurrentTime:getCurrentTime,

getUnixTime:getUnixTime,

formatDateThis:formatDateThis,

formatTime: formatTime,

formatTimes: formatTimes,

toDate: toDate,

getDateDiff: getDateDiff,

mathChangeDate: mathChangeDate,

compareTime: compareTime,

datePassDays:datePassDays

}