最近发现Flex处理字符串的工具类一共有三个,分别是:
下面分别整理及介绍下这三个工具类的用法:
1.trim()
2.isWhitespace() 判断是否是空白字符
3.trimArrayElements()
删除数组中每个元素的开头和末尾的所有空格字符,此处数组作为字符串存储。
4.substitute()
使用传入的各个参数替换指定的字符串内的“{n}”标记。
示例:
var str:String = "here is some info '{0}' and {1}"; trace(StringUtil.substitute(str, 15.4, true)); // this will output the following string: // "here is some info '15.4' and true"
mx.utils下包StringUtil的子集,用法同StringUtil
<?xml version="1.0" encoding="utf-8"?> <mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" backgroundColor="#ffffff" layout="absolute"> <mx:Script> <![CDATA[ import com.adobe.utils.StringUtil; ]]> </mx:Script> <mx:VBox> <mx:HBox> <mx:Label text="input1"/> <mx:TextInput id="input1" text="input1"/> </mx:HBox> <mx:HRule width="100%" height="1"/> <mx:HBox> <mx:Label text="is input1 begins with:"/> <mx:TextInput id="beginsWith" text="i"/> </mx:HBox> <mx:HRule width="100%" height="1"/> <mx:Text text="beginsWith:{ StringUtil.beginsWith(input1.text,beginsWith.text)}"/> <mx:HRule width="100%" height="1"/> <mx:Text text="input1 has value ?:{ StringUtil.stringHasValue(input1.text) }"/> <mx:HRule width="100%" height="1"/> <mx:HBox> <mx:Label text="is input1 ends with:"/> <mx:TextInput id="endsWith" text="1"/> </mx:HBox> <mx:Text text="endsWith:{ StringUtil.endsWith(input1.text,endsWith.text)}"/> <mx:HRule width="100%" height="1"/> <mx:HBox> <mx:Label text="string to be removed from input1"/> <mx:TextInput id="removeString"/> </mx:HBox> <mx:Text text="remove:{ StringUtil.remove(input1.text,removeString.text)}"/> <mx:HRule width="100%" height="1"/> <mx:HBox> <mx:Label text="string to be replaced from input1"/> <mx:TextInput id="replace"/> </mx:HBox> <mx:HBox> <mx:Label text="string to be replace with"/> <mx:TextInput id="replaceWith"/> </mx:HBox> <mx:Text text="replace:{ StringUtil.replace(input1.text,replace.text,replaceWith.text) }"/> <mx:HRule width="100%" height="1"/> <mx:Text text="ltrim:{ StringUtil.ltrim(input1.text)}"/> <mx:Text text="trim:{StringUtil.trim(input1.text)}"/> <mx:Text text="rtrim:{StringUtil.rtrim(input1.text)}"/> <mx:HRule width="100%" height="1"/> <mx:HBox> <mx:Label text="input2"/> <mx:TextInput id="input2" text="input1"/> <mx:Label text="is case sensitive?"/><mx:CheckBox id="caseSensitive" selected="true"/> </mx:HBox> <mx:Text text="input1 and input2 are equal?:{ StringUtil.stringsAreEqual(input1.text,input2.text,caseSensitive.selected)}"/> </mx:VBox> </mx:Application>
输出结果: