Flex xml的实用操作

　　XML类包含用于处理XML对象的工作方法和属性。 XML类（以及XMLList，命名空间和QName类）基于ECMAScript中定义的XML（E4X）规范（ECMA - 357第2版）标准，实现了强大的XML处理在。使用toXMLString（）方法返回的XML对象的字符串表示不论XML对象具有简单内容还是复杂内容。
　　但是flex的xml操作还不支持xquery等简便、强大的查询操作，但是对于一般的xml结点读取、属性读取、结点查找、属性查找、结点遍历等还是完全可以胜任。
　　本文提供了一个xml操作的实用Demo，主要有下述3部分内容：
　　1）构建xml；
　　2）xml结点读取、属性读取、结点遍历等；
　　3）用户可以利用..先得到所有结点列表xmllist，然后遍历该xmllist查找任何元素、结点。   flex/spark"                xmlns:mx="library://ns.adobe.com/flex/mx" width="800"                height="600" creationComplete="init()" fontSize="11">                                                                                                                                                              11 Main St.                             San Francisco                             CA                             98765                                                                                                                                                       99 Broad St.                             Newton                             MA                             01234                                                                   ;               //显示xml               XML.prettyIndent = 2;    //设置xml缩进量               txtSrc.text = employees.toXMLString();            }                        protectedfunction btnShow_clickHandler(event:MouseEvent):void            {               var  output:String = "";               //employees.employee[0].address.zip, 98765               output+="employees.employee[0].address.zip: "+employees.employee[0].address.zip+"\r\n\r\n";               //employees.employee[1].@ssn, 789-789-7890               output+="employees.employee[1].@ssn: "+employees.employee[1].@ssn+"\r\n\r\n";               //employees.employee.name,                //               output+="employees.employee.name: "+employees.employee.name+"\r\n\r\n";               //employees..zip[0], 98765               output+="employees..zip[0]: "+employees..zip[0]+"\r\n\r\n";               //employees..@ssn[1], 789-789-7890               output+="employees..@ssn[1]: "+employees..@ssn[1]+"\r\n\r\n";               //employees..name,                //               output+="employees..name: "+employees..name+"\r\n\r\n";               //employees.employee[0].address.*, 11 Main St.                //San Francisco               //CA               //98765               output+="employees.employee[0].address.*: "+employees.employee[0].address.*+"\r\n";                 txtOpreate.text = output;              }        ]]>