常用的js处理方法(数字每隔三位加逗号分开，日期) web前端

(1)把数字每隔三位加逗号分开

function FormatNum(str){ var str = ''+str; var newStr = ""; var count = 0; if(str.indexOf(".")==-1){ for(var i=str.length-1; i>=0; i--){ if(count % 3 == 0 && count != 0){ newStr = str.charAt(i) + "," + newStr; }else{ newStr = str.charAt(i) + newStr; } count++; } //str = newStr + ".00"; //自动补小数点后两位 str = newStr; } else { for(var i = str.indexOf(".")-1; i>=0; i--){ if(count % 3 == 0 && count != 0){ newStr = str.charAt(i) + "," + newStr; }else{ newStr = str.charAt(i) + newStr; //逐个字符相接起来 } count++; } str = newStr + (str + "00").substr((str + "00").indexOf("."),3); } return str; }

【常用的js处理方法(数字每隔三位加逗号分开，日期)】(2)日期处理

/*@description：获取星期几 * @param: 当前周几的基础上，往后加多少天，若为空则表示当天是周几 * */ function getWeek(param){ var param = param==undefined?0:param; var date = new Date(); var day = date.getDay(); var week=['周日','周一','周二','周三','周四','周五','周六']; var add=parseInt((day+param))%7; return week[add]; }/*@description：获取年月日 yyyy-mm-dd * @param: 当前日期的基础上，往后加多少天，若为空则表示当天 * */ function getYMD(param){ var param = param==undefined?0:param; var seperator1 = "-"; var date = new Date(); date.setDate(date.getDate()+param); var year = date.getFullYear(); var month = parseInt(date.getMonth() + 1); month = month<10?'0'+month:month; var strDate = parseInt(date.getDate()); strDate = strDate<10?'0'+strDate:strDate; var strdate = year + seperator1 + month + seperator1 + strDate; return strdate; }/*@description：获取当前时间 yyyy-mm-dd hh:mm:ss * */ function getNowFormatDate() { var date = new Date(); var seperator1 = "-"; var seperator2 = ":"; var year = date.getFullYear(); var month = date.getMonth() + 1; var second = date.getSeconds(); var strDate = date.getDate(); if (month >= 1 && month <= 9) { month = "0" + month; } if (second <= 9) { second = "0" + second; } if (strDate >= 0 && strDate <= 9) { strDate = "0" + strDate; } var currentdate = year + seperator1 + month + seperator1 + strDate + " " + date.getHours() + seperator2 + date.getMinutes() + seperator2 + second; return currentdate; }