FLEX/flash/ajax利用压缩解决大数据量异步传输优化问题

               xmlns:s=“library://ns.adobe.com/flex/spark”   

               xmlns:mx=“library://ns.adobe.com/flex/mx” minWidth=“955″ minHeight=“600″ creationComplete=“init()”> 

            /*  

            * deflate.mxml  

            * 作者：偶尔陶醉  blog:www.stutostu.com  

            * 功能: 模拟股票K线图，向PHP接口调用大量数据  

            */  

            import flash.utils.ByteArray;  

            import mx.collections.ArrayCollection;  

            import mx.controls.Alert;  

            import mx.controls.Label;  

            import mx.rpc.events.ResultEvent;  

            import mx.utils.Base64Decoder;  

            import spark.components.TextArea;  

            private var str:String;  

            [Bindable]   

            private var _myData:ArrayCollection;  

            private var big:ArrayCollection;  

            private var page:int=1;  

            private var allpage:int;  

            private var start:int = 0;  

            private function init():void{  

                this.systemManager.stage.addEventListener(KeyboardEvent.KEY_DOWN ,_keyDownHandler);  

                srv.url = “http://localhost/test.php”;  

                srv.send();  

            }  

            private function resultDatas(event:ResultEvent):void{  

                str = event.result.toString();  

                var base64:Base64Decoder = new Base64Decoder();  

                base64.decode( str );  

                var byte:ByteArray = new ByteArray();  

                byte = base64.toByteArray();  

                byte.inflate();  

                var result:String = byte.toString();  

                var words:Array=result.split(‘;’);  

                var subwords:Array=[];    

                allpage = words.length-1;  

                var max:Number=1;  

                var min:Number=100000;  

                big = new ArrayCollection();  

                Alert.show(“ooxx”);  

                for(var i:int = 0;i <= allpage;i++)  

                {  

                    subwords=words[i].split(‘,’);  

                    subwords[0] = subwords[0].substr(0,10);  

                    big.addItem({“Date”: subwords[0], “Open”: Number(subwords[1]), “High”:Number(subwords[2]),   

                        “Low”:Number(subwords[3]),”Close”:Number(subwords[4]),”Vol”:Number(subwords[5]),  

                        “Amount”:subwords[6],”VMa5″:subwords[7],”VMa10″:subwords[8],”VMa20″:subwords[9],  

                        “Ma5″:subwords[10],”Ma10″:subwords[11],”Ma20″:subwords[12],”Ma30″:subwords[13],  

                        “K”:subwords[14],”D”:subwords[15],”J”:subwords[16],”Diff”:subwords[17],  

                        “Dea”:subwords[18],”Macd”:subwords[19]});  

                }  

                extrude();  

            }  

            public function extrude():void{  

                page <= 0 ? page = 1 : ”;  

                var end:int = page*30;  

                _myData = new ArrayCollection();  

                for(var i:int=0;i<=end;i++)  

                {  

                    _myData.addItem( {“Date”: big[i]['Date'], “Open”: big[i]['Open'], “High”:big[i]['High'],   

                        “Low”:big[i]['Low'],”Close”:big[i]['Close'],”Vol”:big[i]['Vol'],  

                        “Amount”:big[i]['Amount'] } );  

                }  

            }  

            protected function _keyDownHandler(event:KeyboardEvent):void{  

                switch(event.keyCode)  

                {  

                    case 38:  

                        page–;  

                        extrude();  

                        break;  

                    case 40:  

                        page++;  

                        extrude();  

                        break;  

                }  

            }  

        ]]> 

                         color=“#FFFFFF” dataProvider=“{_myData}” 

                         paddingLeft=“2″ showDataTips=“false” 

                         textAlign=“right” > 

                                  openField=“Open” 

                                  highField=“High” 

                                  lowField=“Low” 

                                  closeField=“Close” 

                                  fill=“{up}” 

                                  declineFill=“{down}” 

                                  />