javascript Date 操作日期

分手后的思念是犯贱 2024-04-20 08:46 81阅读 0赞

/**
     * 功能：获取中文星期
     * 参数：date日期类型
     */
    function getChineseWeek(date) {
    	var week = date.getDay();
    	var chineseWeek = "";
    	switch(week) {
    		case 0: chineseWeek = "星期日"; break;
    		case 1: chineseWeek = "星期一"; break;
    		case 2: chineseWeek = "星期二"; break;
    		case 3: chineseWeek = "星期三"; break;
    		case 4: chineseWeek = "星期四"; break;
    		case 5: chineseWeek = "星期五"; break;
    		case 6: chineseWeek = "星期六"; break;
    	}
    	return chineseWeek;
    }
    
    /**
     * 功能：获取指定日期格式化后的前一天字符串
     * 参数：date 日期字符串
     * 参数：format 格式化字符串 yyyymmdd、yyyy-MM-dd、yyyy-MM-dd hh:mm:ss
     */
    function beforeDayByDate(date, format) {
    	var oneDay = 1000 * 60 * 60 * 24;
    	var retDate = "";
    	if (typeof date != "string" || date.length != 8) {
    		return;
    	}
    	var year  = parseInt(date.substring(0, 4));
    	var month = parseInt(date.substring(4, 6)) - 1;
    	var day   = parseInt(date.substring(6, 8));
    
    	var _date = new Date();
    	_date.setFullYear(year);
    	_date.setMonth(month);
    	_date.setDate(day);
    	_date = new Date(_date.getTime() - oneDay);
    	switch(format) {
    		case "yyyy-MM-dd":          retDate = getDate1(_date); break;
    		case "yyyy-MM-dd hh:mm:ss": retDate = getDate2(_date); break;
    		case "yyyymmdd":            retDate = getDate3(_date); break;
    		default: retDate = "date format error.";
    	}
    	return retDate;
    }
    
    /**
     * 功能：获取指定日期格式化后的后一天字符串
     * 参数：date 日期字符串
     * 参数：format 格式化字符串 yyyymmdd、yyyy-MM-dd、yyyy-MM-dd hh:mm:ss
     */
    function nextDayByDate(date, format) {
    	var oneDay = 1000 * 60 * 60 * 24;
    	var retDate = "";
    	if (typeof date != "string" || date.length != 8) {
    		return;
    	}
    	var year  = parseInt(date.substring(0, 4));
    	var month = parseInt(date.substring(4, 6)) - 1;
    	var day   = parseInt(date.substring(6, 8));
    
    	var _date = new Date();
    	_date.setFullYear(year);
    	_date.setMonth(month);
    	_date.setDate(day);
    	_date = new Date(_date.getTime() + oneDay);
    	switch(format) {
    		case "yyyy-MM-dd":          retDate = getDate1(_date); break;
    		case "yyyy-MM-dd hh:mm:ss": retDate = getDate2(_date); break;
    		case "yyyymmdd":            retDate = getDate3(_date); break;
    		default: retDate = "date format error.";
    	}
    	return retDate;
    }
    
    /**
     * 功能：获取指定日期格式化后的符串
     * 参数：date 日期字符串
     * 参数：format 格式化字符串 yyyymmdd、yyyy-MM-dd、yyyy-MM-dd hh:mm:ss
     */
    function formatDate(date, format) {
    	var retDate = "";
    	if (typeof date != "string" || date.length != 8) {
    		return;
    	}
    	var year  = parseInt(date.substring(0, 4));
    	var month = parseInt(date.substring(4, 6)) - 1;
    	var day   = parseInt(date.substring(6, 8));
    
    	var _date = new Date();
    	_date.setFullYear(year);
    	_date.setMonth(month);
    	_date.setDate(day);
    	switch(format) {
    		case "yyyy-MM-dd":          retDate = getDate1(_date); break;
    		case "yyyy-MM-dd hh:mm:ss": retDate = getDate2(_date); break;
    		case "yyyymmdd":            retDate = getDate3(_date); break;
    		default: retDate = "date format error.";
    	}
    	return retDate;
    }
    
    /**
     * 功能：当前日期前一天
     * 参数format格式有：
     * 1、yyyy-MM-dd 
     * 2、yyyy-MM-dd hh:mm:ss
     * 3、yyyymmdd
     */
    function beforeDay(format) {
    	var oneDay = 1000 * 60 * 60 * 24;
    	var date = "";
    	switch(format) {
    		case "yyyy-MM-dd": date = getDate1(new Date(Date.now() - oneDay)); break;
    		case "yyyy-MM-dd hh:mm:ss": date = getDate2(new Date(Date.now() - oneDay)); break;
    		default: date = "date format error.";
    	}
    	return date;
    }
    
    /**
     * 功能：当前日期后一天
     * 参数format格式有：
     * 1、yyyy-MM-dd 
     * 2、yyyy-MM-dd hh:mm:ss
     */
    function nextDay(format) {
    	var oneDay = 1000 * 60 * 60 * 24;
    	var date = "";
    	switch(format) {
    		case "yyyy-MM-dd": date = getDate1(new Date(Date.now() + oneDay)); break;
    		case "yyyy-MM-dd hh:mm:ss": date = getDate2(new Date(Date.now() + oneDay)); break;
    		default: date = "date format error.";
    	}
    	return date;
    }
    
    /**
     * 功能：根据指定格式获取格式化后的日期字符串
     * 参数format格式有：
     * 1、yyyy-MM-dd 
     * 2、yyyy-MM-dd hh:mm:ss
     * 3、yyyymmdd
     */
    function getCurrentTime(format) {
    	var date = "";
    	switch(format) {
    		case "yyyy-MM-dd":          date = getDate1(new Date()); break;
    		case "yyyy-MM-dd hh:mm:ss": date = getDate2(new Date()); break;
    		case "yyyymmdd":            date = getDate3(new Date()); break;
    		default: date = "date format error.";
    	}
    	return date;
    }
    
    /**
     * 功能：返回yyyymmdd格式日期字符串
     * 参数：date Date类型
     */
    function getDate3(date) {
    	var _date = "";
    	var year  = date.getFullYear();
    	var month = addZero(date.getMonth() + 1);
    	var day   = addZero(date.getDate());
    	_date = year + month + day;
    	return _date;
    }
    
    /**
     * 功能：返回yyyy-MM-dd格式日期字符串
     * 参数：date Date类型
     */
    function getDate1(date) {
    	var _date = "";
    	var year  = date.getFullYear();
    	var month = addZero(date.getMonth() + 1);
    	var day   = addZero(date.getDate());
    	_date = year + "-" + month + "-" + day;
    	return _date;
    }
    
    /**
     * 功能：返回yyyy-MM-dd hh:mm:ss格式日期字符串
     * 参数：date Date类型
     */
    function getDate2(date) {
    	var _date  = "";
    	var year   = date.getFullYear();
    	var month  = addZero(date.getMonth() + 1);
    	var day    = addZero(date.getDate());
    	var hours  = addZero(date.getHours());
    	var minute = addZero(date.getMinutes());
    	var second = addZero(date.getSeconds());
    	_date = year + "-" + month + "-" + day + " " + hours + ":" + minute + ":" + second;
    	return _date;
    }
    
    /**
     * 功能：前补0
     * 参数：str 字符串类型
     */
    function addZero(str) {
    	if ((typeof str) != "string") {
    		str += "";
    	}
    	if (str.length < 2) {
    		str = "0" + str;
    	}
    	return str;
    }