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<!DOCTYPE html>
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<title>JSDoc: Source: date.js</title>
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<h1 class="page-title">Source: date.js</h1>
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<article>
<pre class="prettyprint source linenums"><code>/*
对Date对象的操作
*/
/**
* [dateToString description] 获取字符串形式的年月日，使用数组的join方法返回连接起来的字符串
* @param date {Date} 需要转换成字符串格式的日期
* @return {String} 字符串格式的日期
*/
function dateToString(date) {
return [date.getFullYear(),
(date.getMonth() + 1 < 10) ? '0' + (date.getMonth() + 1) : date.getMonth() + 1,
(date.getDate() < 10) ? '0' + (date.getDate()) : date.getDate()
].join("-");
}
/**
* [stringToDate description] 使字符串形式的日期返回为Date型的日期
* @param str {String} 需要转换成日期格式的字符串
* @return {Date} 日期
*/
function stringToDate(str) {
const strArr = str.split('-');
return new Date(strArr[0], strArr[1] - 1, strArr[2]);
}
/**
* [formatDate description] 时间戳转换
* @param date {Date} Date对象
* @param fmt {String} 转换格式
* @return {String} 返回一个转换后的字符串
*/
function formatDate (date, fmt) {
var o = {
'M+': date.getMonth() + 1,
'd+': date.getDate(),
'h+': date.getHours(),
'm+': date.getMinutes(),
's+': date.getSeconds(),
'q+': Math.floor((date.getMonth() + 3) / 3),
S: date.getMilliseconds(),
};
if (/(y+)/.test(fmt)) {
fmt = fmt.replace(RegExp.$1, (date.getFullYear() + '').substr(4 - RegExp.$1.length));
}
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;
}
/**
* [genTimeStamp description] 生成一个随机数时间戳，来自：Coco
* @return {String} 随机数时间戳
*/
function genTimeStamp() {
var a = Math.random,
b = parseInt;
return Number(new Date()).toString() + b(10 * a()) + b(10 * a()) + b(10 * a());
}
/**
* [timeAgo description] 时间转换，转换为'几分钟前'、'几个月前'、'几天前'这种，来自：http://caibaojian.com/timestamp.html
* @param agoTimeStamp {Number} 之前的时间戳
* @param nowTimeStamp {Number} 当前时间戳，默认为new Date().getTime()
* @return {String} 返回一个转换后的字符串
*/
function timeAgo(agoTimeStamp, nowTimeStamp){
var now = new Date().getTime() || nowTimeStamp;
var minute = 1000 * 60;
var hour = minute * 60;
var day = hour * 24;
var month = day * 30;
var diffValue = now - agoTimeStamp;
if(diffValue < 0){
return false;
}
var monthC =diffValue/month;
var weekC =diffValue/(7*day);
var dayC =diffValue/day;
var hourC =diffValue/hour;
var minC =diffValue/minute;
var result = '';
if(monthC>=1){
result="" + parseInt(monthC) + "个月前";
}
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";
}else{
result="刚刚";
}
return result;
}
/**
* [generateDaysArray description] 根据开始时间和结束时间，返回其间所有天组成的数组
* @param start {String} 字符串格式的开始日期
* @param end {String} 字符串格式的结束日期
* @return {Array} 其间所有天组成的数组
*/
function generateDaysArray(start, end) {
// 获取传入字符串形式参数的Date型日期
const retArr = [];
if (start && end) {
if (start === end) { // TODO: 优化这部分逻辑
retArr.push(dateToString(stringToDate(start)));
return retArr;
}
var st = stringToDate(start);
const et = stringToDate(end);
// 获取开始日期的年，月，日
const yyyy = st.getFullYear(),
mm = st.getMonth();
var dd = st.getDate();
// 循环
while (st.getTime() !== et.getTime()) {
// 使用dd++进行天数的自增
st = new Date(yyyy, mm, dd++);
retArr.push(dateToString(st));
}
}
return retArr;
}
/**
* [getDateDiff description] 根据开始时间和结束时间，计算相差的天数
* @param start {String} 字符串格式的开始日期->"YYYY-MM-DD"
* @param end {String} 字符串格式的结束日期->"YYYY-MM-DD"
* @return {Number} 相差天数
*/
function getDateDiff(start, end) {
var aDate, oDate1, oDate2, iDays;
aDate = start.split("-");
oDate1 = new Date(aDate[1] + '-' + aDate[2] + '-' + aDate[0]); // 转换为12-18-2002格式
aDate = end.split("-");
oDate2 = new Date(aDate[1] + '-' + aDate[2] + '-' + aDate[0]);
iDays = parseInt(Math.abs(oDate1 - oDate2) / 1000 / 60 / 60 /24); // 把相差的毫秒数转换为天数
return iDays + 1; // 需要将最后一天加上
}</code></pre>
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