Flex 操作xml 例子

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本文介绍了一个使用ActionScript 3 (AS3) 进行XML解析的例子，展示了如何通过AS3内置的XML类来访问和操作XML文档中的数据。

package {
    import flash.display.Sprite;

    public class XmlExample extends Sprite {        
        public function XmlExample() {
            var employees:XML =
                <employees>
                    <employee ssn="123-123-1234">
                        <name first="John" last="Doe"/>
                        <address>
                            <street>11 Main St.</street>
                            <city>San Francisco</city>
                            <state>CA</state>
                            <zip>98765</zip>
                        </address>
                    </employee>
                    <employee ssn="789-789-7890">
                        <name first="Mary" last="Roe"/>
                        <address>
                            <street>99 Broad St.</street>
                            <city>Newton</city>
                            <state>MA</state>
                            <zip>01234</zip>
                        </address>
                    </employee>
                </employees>;

            trace(employees.employee[0].address.zip);   // 98765

            trace(employees.employee[1].@ssn);          // 789-789-7890

            trace(employees.employee.name);             // <name first="John" last="Doe"/>
                                                        // <name first="Mary" last="Roe"/>

            trace(employees..zip[0]);                   // 98765

            trace(employees..@ssn[1]);                  // 789-789-7890

            trace(employees..name);                     // <name first="John" last="Doe"/>
                                                        // <name first="Mary" last="Roe"/>

            trace(employees.employee[0].address.*);     // <street>11 Main St.</street>    
                                                        // <city>San Francisco</city>
                                                        // <state>CA</state>
                                                        // <zip>98765</zip>
            var node:String = "zip";
            trace(employees.employee[0].address[node]); // 98765
            
            var attribute:String = "ssn";
            trace(employees.employee[1].@[attribute]);  // 789-789-7890
            
            for each (var num:XML in employees..@ssn) {
                trace(num);                             // 123-123-1234
            }                                           // 789-789-7890
            
            var ssnToFind:String = "789-789-7890";
            trace(employees.employee.(@ssn == ssnToFind).toXMLString());
                                                        // <employee ssn="789-789-7890">
                                                        // <name first="Mary" last="Roe"/>
                                                        // <address>
                                                        // <street>99 Broad St.</street>
                                                        // <city>Newton</city>
                                                        // <state>MA</state>
                                                        // <zip>01234</zip>
                                                        // </address>
                                                        // </employee>
        }
    }
}