public class Util { public function Util() { } /**  * 時(shí)間處理類，相加返回相加后的date  * @param datepart 要相加的時(shí)間位置  * @param number 相加的數(shù)值  * @param date 相加的date沒(méi)有傳入是當(dāng)前時(shí)間  * @return 返回的是相加后的date  * yxy  */ public function dateAdd(datepart:String = "", number:Number = 0, date:Date = null):Date {  if (date == null) {  /* Default to current date. */  date = new Date();  }  var returnDate:Date = new Date(date.time);;  switch (datepart.toLowerCase()) {  case "fullyear":  case "month":  case "date":  case "hours":  case "minutes":  case "seconds":  case "milliseconds":   returnDate[datepart] += number;   break;  default:   /* Unknown date part, do nothing. */   break;  }  return returnDate; } /**  * 兩個(gè)date的的時(shí)間差  * @param dataBegin 開(kāi)始時(shí)間  * @param dateEnd 結(jié)束時(shí)間  * @return 返回差的天數(shù)  *  */ public function dateDiff(dataBegin:Date,dateEnd:Date):Number{  var diff:Number = (dateEnd.time-dataBegin.time)/new Number(24*60*60*1000);  return diff; } /**  * 比較兩date的大小  * @param date1  * @param date2  * @return date1<date2返回-1，date1=date2返回0，date1>date2返回1。  *  */ public function dateCompare(date1:Date, date2:Date):int {   if (Number(date1) < Number(date2)) {   return -1   }  if (Number(date1) == Number(date2)) {   return 0;   }   return 1;  } }