[zz]Flex与服务器端的几种通信方式

1. Flex通过HttpService与服务端Servlet通信

    flex代码：

<?xml version=”1.0″ encoding=”utf-8″?>  

<s:Application xmlns:fx=”http://ns.adobe.com/mxml/2009″    

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

               xmlns:mx=”library://ns.adobe.com/flex/halo”

minWidth=”1024″ minHeight=”768″>  

    <fx:Script>  

        <!–[CDATA[   

            import mx.controls.*;   

            import mx.rpc.events.ResultEvent;   

            import mx.rpc.http.mxml.HTTPService;   

            protected function button1_clickHandler(event:MouseEvent):void   

            {   

                var addNew:HTTPService = new HTTPService();   

                addNew.resultFormat = "text" ;   

                addNew.method = "POST";   

                addNew.url = "http://localhost:8084/Flex_web/flex";   

                addNew.addEventListener(ResultEvent.RESULT,result_Handler);   

                var param:Object = new Object();   

                param.user = user.text;   

                param.pwd = pwd.text;   

                addNew.send(param);   

            }   

            public function result_Handler(event:ResultEvent):void   

            {   

                var mes:String = event.message.body.toString();   

                Alert.show("成功！" + mes,"信息");    

            }   

        ]]–>  

    </fx:Script>  

    <fx:Declarations>  

        <!– Place non-visual elements (e.g., services, value objects) here –>  

    </fx:Declarations>  

    <s:Panel x=”200″ y=”110″ width=”224″ height=”157″ title=”登录系统”>  

        <s:Button x=”24″ y=”92″ label=”登录” click=”button1_clickHandler(event)” width=”171″ focusEnabled=”true”/>  

        <s:TextInput x=”67″ y=”10″ id=”user”/>  

        <s:TextInput x=”67″ y=”49″ id=”pwd”/>  

        <s:Label x=”20″ y=”15″ text=”用户名：”/>  

        <s:Label x=”20″ y=”55″ text=”密码：”/>  

    </s:Panel>  

</s:Application>  

servlet代码：

package advang;   

import java.io.IOException;   

import java.io.PrintWriter;   

import javax.servlet.ServletException;   

import javax.servlet.http.HttpServlet;   

import javax.servlet.http.HttpServletRequest;   

import javax.servlet.http.HttpServletResponse;   

public class flexServlet extends HttpServlet {   

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)   

    throws ServletException, IOException {   

        response.setContentType(“text/html;charset=UTF-8″);   

        String user = request.getParameter(“user”);   

        String pwd = request.getParameter(“pwd”);   

        user = new String(user.getBytes(“ISO8859-1″),”UTF-8″);   

        pwd = new String(pwd.getBytes(“ISO8859-1″),”UTF-8″);   

        PrintWriter out = response.getWriter();   

        try {   

            out.print(“从服务器返回的数据[" + user + "][" + pwd + "]！”);   

        } finally {    

            out.close();   

        }   

    }    

    @Override  

    protected void doGet(HttpServletRequest request, HttpServletResponse response)   

    throws ServletException, IOException {   

        processRequest(request, response);   

    }    

    @Override  

    protected void doPost(HttpServletRequest request, HttpServletResponse response)   

    throws ServletException, IOException {   

        processRequest(request, response);   

    }   

    @Override  

    public String getServletInfo() {   

        return ”Short description”;   

    }   

}  

2. Flex通过HttpService与服务端的XML通信

XML代码

<?xml version=”1.0″ encoding=”UTF-8″?>

<allUnits>

<unit>

<unitName>Red</unitName>

<unitId>1</unitId>

</unit>

<unit>

<unitName>Yellow</unitName>

<unitId>2</unitId>

</unit>

<unit>

<unitName>Green</unitName>

<unitId>3</unitId>

</unit>

<unit>

<unitName>Blue</unitName>

<unitId>4</unitId>

</unit>

<unit>

<unitName>Orange</unitName>

<unitId>5</unitId>

</unit>

</allUnits>

MXML代码：

<?xml version=”1.0″ encoding=”utf-8″?>

<!–初始化是调用inits()函数读取服务端的xml文件–>

<s:Application xmlns:fx=”http://ns.adobe.com/mxml/2009″ 

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

   xmlns:mx=”library://ns.adobe.com/flex/mx” 

   minWidth=”955″ minHeight=”600″

   creationComplete=”inits()” >

<fx:Script>

<![CDATA[

import mx.controls.Alert;

import mx.rpc.events.ResultEvent;

//初始化函数 读取服务端的XML文件

protected function inits():void

{

UnitRPC.send();

}

//对返回的结果进行处理

protected function UnitRPC_resultHandler(event:ResultEvent):void

{

show.dataProvider=event.result.allUnits.unit;

}

]]>

</fx:Script>

<fx:Declarations>

<!–构建HttpService对象 指明请求地址和返回结果处理函数–>

<s:HTTPService id=”UnitRPC” url=”com/iman/demo/units.xml” 

   result=”UnitRPC_resultHandler(event)” />

</fx:Declarations>

<s:layout>

<s:VerticalLayout paddingTop=”20″ horizontalAlign=”center” verticalAlign=”top”/>

</s:layout>

<s:Panel title=”HttpService和XML的通信”>

<s:layout>

<s:VerticalLayout paddingTop=”20″ horizontalAlign=”center” verticalAlign=”top”/>

</s:layout>

<mx:DataGrid id=”show” >

<mx:columns>

<mx:DataGridColumn headerText=”名称” dataField=”unitName” />

<mx:DataGridColumn headerText=”ID” dataField=”unitId”/>

</mx:columns>

</mx:DataGrid>

</s:Panel>

</s:Application>

 

 

出自：http://java-china.cn/?p=88#respond