ActionScript3:日期工具类

DateUtils.as

package com.ultrapower.tomas.special.utils
{
	import mx.formatters.DateFormatter;

	/*************************************************************\
	 * 相关日期工具类
	 *
	 * @author liekkas.zeng
	 * @since  2012.03.31
	 \*************************************************************/
	public class DateUtils
	{
		private static var df:DateFormatter = new DateFormatter();
		
		/**
		 * 根据日期字符返回日期类型
		 * 例如：2012-03-31 18:37:46
		 * */
		public static function string2Date(parStr:String):Date
		{
			var arr1:Array = parStr.split(' ');
			if(arr1.length==2)
			{
				var dateAry:Array = (arr1[0] as String).split('-');
				var timeAry:Array = (arr1[1] as String).split(':');
				
				return new Date(dateAry[0],dateAry[1],dateAry[2],timeAry[0],timeAry[1],timeAry[2]);
			}
			
			return new Date();
		}
		
		/**
		 * 日期转字符串
		 * */
		public static function date2String(date:Date,format:String="YYYY-MM-DD HH:NN:SS"):String
		{
			df.formatString = format;
			return df.format(date);
		}
		
		/** 年 月 日 计算
		 * datepart值:"fullyear":"month":"date":"hours":"minutes":"seconds":"milliseconds":
		 * ("fullYear", 2)两年后
		 * ("fullYear", -2)两年前
		 * ("month", 11)11个月后的日期
		 * ("month", 11)11个月前的日期
		 * ("date", 4)4天后的日期
		 * ("date", -4)4天前的日期 
		 * */
		public static  function dateAdd(datepart:String = "", number:Number = 0, date:Date = null):Date 
		{
			if (date == null) {
				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:
					break;
			}
			return returnDate;
		}
	}
}