[AS3]StringUtil类-更新方法

发布:kinglong | 发布时间: 2009年1月6日

[AS3]StringUtil类-更新方法

增加方法:

1、添加新字符到指定位置

public static function addAt(char:String, value:String, position:int):String

2、替换指定位置字符

public static function replaceAt(char:String, value:String, beginIndex:int, endIndex:int):String

3、删除指定位置字符

public static function removeAt(char:String, beginIndex:int, endIndex:int):String

4、修复双换行符

public static function fixNewlines(char:String):String

/** * @link http://www.klstudio.com * @author Kinglong * @playerversion flash player 9+ * @asversion 3.0 * @version 0.6 * @builddate 20081023 * @updatedate 20090106 */ package com.klstudio.util{ 	 	import flash.utils.ByteArray; 	 	public class StringUtil{ 				 		//忽略大小字母比较字符是否相等; 		public static function equalsIgnoreCase(char1:String,char2:String):Boolean{ 			return char1.toLowerCase() == char2.toLowerCase(); 		} 		 		//比较字符是否相等; 		public static function equals(char1:String,char2:String):Boolean{ 			return char1 == char2; 		} 		 		//是否为Email地址; 		public static function isEmail(char:String):Boolean{ 			if(char == null){ 				return false; 			} 			char = trim(char); 			var pattern:RegExp = /(\w|[_.\-])+@((\w|-)+\.)+\w{2,4}+/; 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		 		//是否是数值字符串; 		public static function isNumber(char:String):Boolean{ 			if(char == null){ 				return false; 			} 			return !isNaN(Number(char)); 		} 		 		//是否为Double型数据; 		public static function isDouble(char:String):Boolean{ 			char = trim(char); 			var pattern:RegExp = /^[-\+]?\d+(\.\d+)?$/; 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		//Integer; 		public static function isInteger(char:String):Boolean{ 			if(char == null){ 				return false; 			} 			char = trim(char); 			var pattern:RegExp = /^[-\+]?\d+$/; 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		//English; 		public static function isEnglish(char:String):Boolean{ 			if(char == null){ 				return false; 			} 			char = trim(char); 			var pattern:RegExp = /^[A-Za-z]+$/; 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		//中文; 		public static function isChinese(char:String):Boolean{ 			if(char == null){ 				return false; 			} 			char = trim(char); 			var pattern:RegExp = /^[\u0391-\uFFE5]+$/; 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		//双字节 		public static function isDoubleChar(char:String):Boolean{ 			if(char == null){ 				return false; 			} 			char = trim(char); 			var pattern:RegExp = /^[^\x00-\xff]+$/; 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		 		//含有中文字符 		public static function hasChineseChar(char:String):Boolean{ 			if(char == null){ 				return false; 			} 			char = trim(char); 			var pattern:RegExp = /[^\x00-\xff]/; 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		//注册字符; 		public static function hasAccountChar(char:String,len:uint=15):Boolean{ 			if(char == null){ 				return false; 			} 			if(len < 10){ 				len = 15; 			} 			char = trim(char); 			var pattern:RegExp = new RegExp("^[a-zA-Z0-9][a-zA-Z0-9_-]{0,"+len+"}$", ""); 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		//URL地址; 		public static function isURL(char:String):Boolean{ 			if(char == null){ 				return false; 			} 			char = trim(char).toLowerCase(); 			var pattern:RegExp = /^http:\/\/[A-Za-z0-9]+\.[A-Za-z0-9]+[\/=\?%\-&_~`@[\]\':+!]*([^<>\"\"])*$/; 			var result:Object = pattern.exec(char); if(result == null) { return false; } return true; 		} 		 		// 是否为空白;		 		public static function isWhitespace(char:String):Boolean{ 			switch (char){ 	 case " ": 	 case "\t": 	 case "\r": 	 case "\n": 	 case "\f": 	 return true;	 				default: 	 return false; 	 } 		} 		 		//去左右空格; 		public static function trim(char:String):String{ 			if(char == null){ 				return null; 			} 			return rtrim(ltrim(char)); 		} 		 		//去左空格; 		public static function ltrim(char:String):String{ 			if(char == null){ 				return null; 			} 			var pattern:RegExp = /^\s*/; 			return char.replace(pattern,""); 		} 		 		//去右空格; 		public static function rtrim(char:String):String{ 			if(char == null){ 				return null; 			} 			var pattern:RegExp = /\s*$/; 			return char.replace(pattern,""); 		} 		 		//是否为前缀字符串; 		public static function beginsWith(char:String, prefix:String):Boolean{			 			return (prefix == char.substring(0, prefix.length)); 		} 		 		//是否为后缀字符串; 		public static function endsWith(char:String, suffix:String):Boolean{ 			return (suffix == char.substring(char.length - suffix.length)); 		} 		 		//去除指定字符串; 		public static function remove(char:String,remove:String):String{ 			return replace(char,remove,""); 		} 		 		//字符串替换; 		public static function replace(char:String, replace:String, replaceWith:String):String{			 			return char.split(replace).join(replaceWith); 		} 		 		//utf16转utf8编码; 		public static function utf16to8(char:String):String{ 			var out:Array = new Array(); 			var len:uint = char.length; 			for(var i:uint=0;i<len;i++){ 				var c:int = char.charCodeAt(i); 				if(c >= 0x0001 && c <= 0x007F){ 					out[i] = char.charAt(i); 				} else if (c > 0x07FF) { 					out[i] = String.fromCharCode(0xE0 | ((c >> 12) & 0x0F), 												 0x80 | ((c >> 6) & 0x3F), 												 0x80 | ((c >> 0) & 0x3F)); 				} else { 					out[i] = String.fromCharCode(0xC0 | ((c >> 6) & 0x1F), 												 0x80 | ((c >> 0) & 0x3F)); 				} 			} 			return out.join(''); 		} 		 		//utf8转utf16编码; 		public static function utf8to16(char:String):String{ 			var out:Array = new Array(); 			var len:uint = char.length; 			var i:uint = 0; 			var char2:int,char3:int; 			while(i<len){ 				var c:int = char.charCodeAt(i++); 				switch(c >> 4){ 					case 0: case 1: case 2: case 3: case 4: case 5: case 6: case 7: 						// 0xxxxxxx 						out[out.length] = char.charAt(i-1); 						break; 					case 12: case 13: 						// 110x xxxx 10xx xxxx 						char2 = char.charCodeAt(i++); 						out[out.length] = String.fromCharCode(((c & 0x1F) << 6) | (char2 & 0x3F)); 						break; 					case 14: 						// 1110 xxxx 10xx xxxx 10xx xxxx 						char2 = char.charCodeAt(i++); 						char3 = char.charCodeAt(i++); 						out[out.length] = String.fromCharCode(((c & 0x0F) << 12) | 							((char2 & 0x3F) << 6) | ((char3 & 0x3F) << 0)); 						break; 				} 			} 			return out.join(''); 		} 		 		//转换字符编码; 		public static function encodeCharset(char:String,charset:String):String{ 			var bytes:ByteArray = new ByteArray(); 			bytes.writeUTFBytes(char); 			bytes.position = 0; 			return bytes.readMultiByte(bytes.length,charset); 		} 		 		//添加新字符到指定位置;		 		public static function addAt(char:String, value:String, position:int):String { 			if (position > char.length) { 				position = char.length; 			} 			var firstPart:String = char.substring(0, position); 			var secondPart:String = char.substring(position, char.length); 			return (firstPart + value + secondPart); 		} 		 		//替换指定位置字符; 		public static function replaceAt(char:String, value:String, beginIndex:int, endIndex:int):String { 			beginIndex = Math.max(beginIndex, 0);			 			endIndex = Math.min(endIndex, char.length); 			var firstPart:String = char.substr(0, beginIndex); 			var secondPart:String = char.substr(endIndex, char.length); 			return (firstPart + value + secondPart); 		} 		 		//删除指定位置字符; 		public static function removeAt(char:String, beginIndex:int, endIndex:int):String { 			return StringUtil.replaceAt(char, "", beginIndex, endIndex); 		} 		 		//修复双换行符; 		public static function fixNewlines(char:String):String { 			return char.replace(/\r\n/gm, "\n"); 		} 	} }

标签:

as3 类 StringUtil

发布:kinglong | 分类:Flash相关 | 评论:4 | 引用:0 | 浏览: | TrackBack引用地址

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1.cc
修复双换行符,常用到
2009-1-6 10:53:23 回复该留言

2.chuyue
http://www.chuyue.net/blog/
建立到 google code 更方便
2009-1-7 18:25:00 回复该留言

3.一溜烟
http://ezzz.5dblog.com
好东西!收藏了。可以再增加一个左右补位

例如 1:
trace("KingLong's Record is <"+StringUtil.AddLeft("65535",5,"0")+"> !");

output:

KingLong's Record is <0000065535> !

例如 2:

trace(StringUtil.AddRight("2009-01-22 23",2,":00"));

output:

2008-10-01 17:00:00
2009-1-22 23:37:57 回复该留言

4.Ephay
isWhitespace，如果连续输入" \t \n \r"，怎么办呢？为啥不用正则表达式来实现啊
public static function isEmptyOrNull(s:String):Boolean {
if(s == null || s == "") return true;
var r:RegExp = /\S/;
return !r.test(s);
}
2009-2-3 9:23:58 回复该留言

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