本文来自:http://java-007.iteye.com/blog/381617
最近看一些文档,总结了一些<mx:HTTPService>给后台传递参数的方法,列举如下:
方法1:采用URLVariables对象
- <?xml version=”1.0″ encoding=”utf-8″?>
- <mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml”
- layout=”absolute” fontSize=”12″
- >
- <mx:Script>
- <![CDATA[
- import mx.controls.Alert;
- import mx.rpc.events.ResultEvent;
- //对提交给后台的参数进行UTF-8的编码处理
- private function httpEncoding(param:String):String{
- return encodeURIComponent(param);
- }
- private function httpEncoding0(param:String):String{
- return param;//encodeURI(param);
- }
- private function doRequest():void{
- btn_do.enabled=false;
- var url:String = "http://localhost:8600/grid.jsp";
- //以下那样写后台会乱码,不管是否做URI编码转换
- //url += "?user="+httpEncoding0("用户名");
- //url += "&psw="+httpEncoding0("密码");
- //trace(url);
- srv.url = url;
- //srv.send();
- //以下这样写正常
- var params:URLVariables = new URLVariables();
- //这个user,psw就是传入后台的参数user,jsp就用 request.getParameter("user")来取
- params.user = httpEncoding("用户名");
- params.psw = httpEncoding("密码");
- srv.send(params);
- }
- private function resultHandler(event:ResultEvent):void{
- Alert.show("与后台交互结束,前台开始取得的数据...","提示信息");
- btn_do.enabled=true;
- }
- ]]>
- </mx:Script>
- <mx:HTTPService id=”srv” result=”resultHandler(event);”/>
- <mx:Panel title=”测试与jsp后台交互” layout=”absolute” width=”100%” height=”90%”>
- <mx:Button id=”btn_do” label=”取得数据” click=”doRequest();”/>
- <mx:Spacer height=”1″/>
- <mx:DataGrid dataProvider=”{srv.lastResult.catalog.product}” width=”100%” height=”100%” y=”28″/>
- </mx:Panel>
- </mx:Application>
<?xml version=”1.0″ encoding=”utf-8″?> <mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml” layout=”absolute” fontSize=”12″ > <mx:Script> <![CDATA[ import mx.controls.Alert; import mx.rpc.events.ResultEvent; //对提交给后台的参数进行UTF-8的编码处理 private function httpEncoding(param:String):String{ return encodeURIComponent(param); } private function httpEncoding0(param:String):String{ return param;//encodeURI(param); } private function doRequest():void{ btn_do.enabled=false; var url:String = "http://localhost:8600/grid.jsp"; //以下那样写后台会乱码,不管是否做URI编码转换 //url += "?user="+httpEncoding0("用户名"); //url += "&psw="+httpEncoding0("密码"); //trace(url); srv.url = url; //srv.send(); //以下这样写正常 var params:URLVariables = new URLVariables(); //这个user,psw就是传入后台的参数user,jsp就用 request.getParameter("user")来取 params.user = httpEncoding("用户名"); params.psw = httpEncoding("密码"); srv.send(params); } private function resultHandler(event:ResultEvent):void{ Alert.show("与后台交互结束,前台开始取得的数据...","提示信息"); btn_do.enabled=true; } ]]> </mx:Script> <mx:HTTPService id=”srv” result=”resultHandler(event);”/> <mx:Panel title=”测试与jsp后台交互” layout=”absolute” width=”100%” height=”90%”> <mx:Button id=”btn_do” label=”取得数据” click=”doRequest();”/> <mx:Spacer height=”1″/> <mx:DataGrid dataProvider=”{srv.lastResult.catalog.product}” width=”100%” height=”100%” y=”28″/> </mx:Panel> </mx:Application>
方法2:采用<mx:request/>,同时也演示了mx:State的用法
- <?xml version=”1.0″ encoding=”utf-8″?>
- <mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml” layout=”absolute”>
- <mx:states>
- <mx:State name=”Logged In”>
- <mx:SetProperty target=”{panel1}” name=”width” value=”95%”/>
- <mx:SetProperty target=”{panel1}” name=”height” value=”95%”/>
- <mx:RemoveChild target=”{password}”/>
- <mx:RemoveChild target=”{username}”/>
- <mx:RemoveChild target=”{label1}”/>
- <mx:RemoveChild target=”{Submit}”/>
- <mx:RemoveChild target=”{label2}”/>
- <mx:SetProperty target=”{panel1}” name=”title” value=”Members Section”/>
- <mx:AddChild relativeTo=”{panel1}” position=”lastChild”>
- <mx:Label x=”10″ y=”10″ text=”Welcome to the Members Section!”/>
- </mx:AddChild>
- <mx:AddChild relativeTo=”{panel1}” position=”lastChild”>
- <mx:Label x=”10″ y=”36″ text=”Here you can do great things, like join the forums @ Viper Creations!”/>
- </mx:AddChild>
- <mx:AddChild relativeTo=”{panel1}” position=”lastChild”>
- <mx:Label x=”10″ y=”62″ text=”Label”/>
- </mx:AddChild>
- </mx:State>
- </mx:states>
- <mx:Script>
- <![CDATA[
- import mx.rpc.events.ResultEvent;
- ]]>
- </mx:Script>
- <mx:Script>
- <![CDATA[
- private function checkLogin(evt:ResultEvent):void
- {
- if(evt.result.loginsuccess == "yes")
- {
- currentState = "Logged In";
- }
- if(evt.result.loginsuccess == "no")
- {
- mx.controls.Alert.show('Invalid username/password');
- }
- }
- ]]>
- </mx:Script>
- <mx:HTTPService id=”login_user” result=”checkLogin(event)” showBusyCursor=”true” method=”POST” url=”http://www.vipercreations.com/site_admin/login.php” useProxy=”false”>
- <mx:request xmlns=”">
- <username>
- {username.text}
- </username>
- <password>
- {password.text}
- </password>
- </mx:request>
- </mx:HTTPService>
- <mx:Panel resizeEffect=”Resize” width=”250″ height=”200″ layout=”absolute” title=”Login System” horizontalCenter=”0″ verticalCenter=”-2″ id=”panel1″>
- <mx:Label x=”10″ y=”10″ text=”Username:” id=”label1″/>
- <mx:TextInput x=”10″ y=”36″ id=”username”/>
- <mx:Label x=”10″ y=”66″ text=”Password:” id=”label2″/>
- <mx:TextInput x=”10″ y=”92″ id=”password” displayAsPassword=”true”/>
- <mx:Button x=”10″ y=”122″ label=”Submit” id=”Submit” click=”login_user.send();”/>
- </mx:Panel>
- </mx:Application>
<?xml version=”1.0″ encoding=”utf-8″?> <mx:Application xmlns:mx=”http://www.adobe.com/2006/mxml” layout=”absolute”> <mx:states> <mx:State name=”Logged In”> <mx:SetProperty target=”{panel1}” name=”width” value=”95%”/> <mx:SetProperty target=”{panel1}” name=”height” value=”95%”/> <mx:RemoveChild target=”{password}”/> <mx:RemoveChild target=”{username}”/> <mx:RemoveChild target=”{label1}”/> <mx:RemoveChild target=”{Submit}”/> <mx:RemoveChild target=”{label2}”/> <mx:SetProperty target=”{panel1}” name=”title” value=”Members Section”/> <mx:AddChild relativeTo=”{panel1}” position=”lastChild”> <mx:Label x=”10″ y=”10″ text=”Welcome to the Members Section!”/> </mx:AddChild> <mx:AddChild relativeTo=”{panel1}” position=”lastChild”> <mx:Label x=”10″ y=”36″ text=”Here you can do great things, like join the forums @ Viper Creations!”/> </mx:AddChild> <mx:AddChild relativeTo=”{panel1}” position=”lastChild”> <mx:Label x=”10″ y=”62″ text=”Label”/> </mx:AddChild> </mx:State> </mx:states> <mx:Script> <![CDATA[ import mx.rpc.events.ResultEvent; ]]> </mx:Script> <mx:Script> <![CDATA[ private function checkLogin(evt:ResultEvent):void { if(evt.result.loginsuccess == "yes") { currentState = "Logged In"; } if(evt.result.loginsuccess == "no") { mx.controls.Alert.show('Invalid username/password'); } } ]]> </mx:Script> <mx:HTTPService id=”login_user” result=”checkLogin(event)” showBusyCursor=”true” method=”POST” url=”http://www.vipercreations.com/site_admin/login.php” useProxy=”false”> <mx:request xmlns=”"> <username> {username.text} </username> <password> {password.text} </password> </mx:request> </mx:HTTPService> <mx:Panel resizeEffect=”Resize” width=”250″ height=”200″ layout=”absolute” title=”Login System” horizontalCenter=”0″ verticalCenter=”-2″ id=”panel1″> <mx:Label x=”10″ y=”10″ text=”Username:” id=”label1″/> <mx:TextInput x=”10″ y=”36″ id=”username”/> <mx:Label x=”10″ y=”66″ text=”Password:” id=”label2″/> <mx:TextInput x=”10″ y=”92″ id=”password” displayAsPassword=”true”/> <mx:Button x=”10″ y=”122″ label=”Submit” id=”Submit” click=”login_user.send();”/> </mx:Panel> </mx:Application>
本文参考:冰山上的播客
http://xinsync.xju.edu.cn/index.php/archives/1513