flex中remoteObject和httpservice的取舍

      remoteObject和java交互的时候需要在remoting-config.xml文件中配置，用httpservice和java交互的时候需要在struts文件中配置action或者在web.xml中配置servlet。httpservice在与action或者servlet交互的时候是可以获取request对象的，所以httpservice可以代替所有remoteObject实现的方法，而remoteObject却不能代替httpservice实现的方法。
      下面来一个httpservice和java交互的例子。
<?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:ns1="iman.sps.component.*"
   preloader="iman.sps.asfile.MyProgressBar"
    creationComplete="bind()"
   xmlns:mx="library://ns.adobe.com/flex/mx"  minWidth="955" minHeight="600" width="100%" height="100%">
<fx:Style source="../cssfile/forms.css"/>
<fx:Declarations>
<!-- 将非可视元素（例如服务、值对象）放在此处 -->
<s:Animate id="bounceEffect" target="{dg}" repeatCount="1" repeatBehavior="reverse" disableLayout="true" duration="1000">
<s:motionPaths>
<s:SimpleMotionPath property="y" valueFrom="{dg.y+10}" valueTo="{dg.y}">
</s:SimpleMotionPath>
<s:SimpleMotionPath property="alpha" valueFrom="0" valueTo="1">
</s:SimpleMotionPath>
</s:motionPaths>
</s:Animate>

<!-- <s:RemoteObject id="allSheet" destination="getAllDoBaseSheet" result="resultHandler(event)"/>-->
<mx:HTTPService
id="allSheet"
method="POST"
url="../../sps/sheet/getAllDoBaseSheet.action"
result="resultHandler(event)"
fault="allSheet_faultHandler(event)"/>
</fx:Declarations>
<fx:Script>
<![CDATA[
import com.adobe.serialization.json.JSON;

import mx.binding.utils.BindingUtils;
import mx.binding.utils.ChangeWatcher;
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.events.ListEvent;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
[Bindable]
public　var　ac:ArrayCollection　=　null;
[Bindable]
private var sheetid:String=null;
private var stuMarkDataArray:ArrayCollection;
[Bindable]
private var workItemId:String = null;
[Bindable]
private var spsCurrentState:String = null;
[Bindable]
private var processDefId:String=null;
[Bindable]
private var activityDefId:String=null;

public function get _processDefId():String{
return processDefId;
}

public function set _processDefId(str:String):void{
processDefId=str;
}

public function get _activityDefId():String{
return activityDefId;
}

public function set _activityDefId(str:String):void{
activityDefId=str;
}

public function get _sheetid():String{
return sheetid;
}

public function set _sheetid(str:String):void{
sheetid=str;
}

public function get _workItemId():String{
return workItemId;
}

public function set _workItemId(str:String):void{
workItemId=str;
}

public function get _spsCurrentState():String{
return spsCurrentState;
}

public function set _spsCurrentState(str:String):void{
spsCurrentState=str;
}

protected function show(event:Event):void
{
bounceEffect.end();
bounceEffect.play();
}

private function toUrl(event:Event):void{
trace("1111");
}

private function init():void{
dg.addEventListener(ListEvent.ITEM_CLICK,handleClickPlay);
}


public　function　bind():void{
　　allSheet.send();
    init();
}　

private　function　resultHandler(event:ResultEvent):void　{

var rawData:String = event.result as String; 
trace(rawData);
var rawArray:Array = JSON.decode(rawData) as Array; 
stuMarkDataArray = new ArrayCollection(rawArray); 
dg.dataProvider = stuMarkDataArray;
//　　 ac　=　ArrayCollection(event.result);
// dg.dataProvider = ac;
}　


private function handleClickPlay(event:ListEvent):void {
//此处得到选中行的对象 selectedItem 返回Object
var obj:Object = (event.currentTarget as DataGrid).selectedItem;
//拿具体值 可根据具体的 dataField 取得 下面是循环拿所有的方法 供参考
// var arr:Array =(event.currentTarget as DataGrid).columns
// for (var i:uint = 0; i < arr.length; i++) {
// var tempCol:DataGridColumn = (event.currentTarget as DataGrid).columns as DataGridColumn;
// trace("属性："+tempCol.dataField+ " =  " + obj[tempCol.dataField]);

// }
// Alert.show(obj.id)

sheetid=(obj.sheetId) as String;
trace("sheetid="+sheetid);
workItemId = (obj.workItemId) as String;
spsCurrentState = (obj.currentState) as String;
activityDefId  = (obj.activityDefId) as String;
processDefId = (obj.processDefId) as String;
}




public function label1_clickHandler(event:MouseEvent):void
{
//调用URL
if(this._sheetid!=null){
var url:String="../../sps/sheet/undoSheetDetail.action?sheetId="+ this._sheetid+"&workItemId="+this._workItemId+"&currentState="+this._spsCurrentState;
url += "&processDefId="+this._processDefId+"&activityDefId="+this._activityDefId;
trace("外部参数="+sheetid);
trace("url="+url);
// Alert.show(url);
var javaeyeUrl:URLRequest = new URLRequest(url);

navigateToURL(javaeyeUrl,"_self");
var n:Object = event.currentTarget as Object;
}
}


public function label1_mouseOverHandler(event:MouseEvent):void
{
var la:Label = event.currentTarget as Label;

la.styleName= "cLable";
}


public function label1_mouseOutHandler(event:MouseEvent):void
{
var la:Label = event.currentTarget as Label;
la.styleName= "aLable";
}


protected function allSheet_faultHandler(event:FaultEvent):void
{
Alert.show("调用失败");
}

]]>
</fx:Script>
<mx:Panel title="待办工单" backgroundColor="#D4E1F2" width="100%" height="100%">
<s:VGroup width="100%" height="100%">
<s:HGroup horizontalAlign="right" width="100%">
<mx:Button label="查询"/>
<mx:Button label="清空"/>
</s:HGroup>
<s:HGroup width="100%">

<mx:Form  width="80%">
<mx:Grid width="99%">
<mx:GridRow width="100%" >
<mx:GridItem width="40%" horizontalAlign="left" verticalAlign="middle" >
<mx:FormItem label="工单号" indicatorGap="25" width="100%">
<mx:TextInput width="60%" />
</mx:FormItem>
</mx:GridItem>
<mx:GridItem width="60%" horizontalAlign="left" verticalAlign="middle">
<mx:FormItem label="工单类型" indicatorGap="25" width="100%">
<mx:TextInput width="40%" />
</mx:FormItem>
</mx:GridItem>
</mx:GridRow>
<mx:GridRow width="100%" >
<mx:GridItem width="40%" horizontalAlign="left" verticalAlign="middle" >
<mx:FormItem label="主    题" indicatorGap="25" width="100%">
<mx:TextInput width="60%" />
</mx:FormItem>
</mx:GridItem>
<mx:GridItem width="60%" horizontalAlign="left" verticalAlign="middle">
<mx:FormItem label="派单时间" indicatorGap="25" width="100%" direction="horizontal" >
<mx:DateField width="48%" textAlign="center" formatString="YYYY-MM-DD"/>
<mx:Label text="至" width="4%"/>
<mx:DateField width="48%" textAlign="center" formatString="YYYY-MM-DD"/>
</mx:FormItem>
</mx:GridItem>
</mx:GridRow>
</mx:Grid>
</mx:Form>
</s:HGroup>
<s:HGroup width="100%" height="80%">

<mx:DataGrid id="dg"  width="100%" doubleClickEnabled="true" doubleClick="label1_clickHandler(event)" creationComplete="show(event)" height="100%">
<mx:columns >
<mx:DataGridColumn id="sheetId" headerText="ID" dataField="id" visible="false">
<mx:itemRenderer>
<fx:Component>
<mx:Label toolTip="双击查看工单" doubleClickEnabled="true" doubleClick="outerDocument.label1_clickHandler(event)">
</mx:Label>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="工单号" dataField="sheetId">
<mx:itemRenderer>
<fx:Component>
<mx:Label toolTip="双击查看工单" doubleClickEnabled="true" doubleClick="outerDocument.label1_clickHandler(event)">
</mx:Label>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="主题" dataField="title">
<mx:itemRenderer>
<fx:Component>
<mx:Label toolTip="双击查看工单" doubleClickEnabled="true" doubleClick="outerDocument.label1_clickHandler(event)">
</mx:Label>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="工单类型"  dataField="type">
<mx:itemRenderer>
<fx:Component>
<mx:Label toolTip="双击查看工单" doubleClickEnabled="true" doubleClick="outerDocument.label1_clickHandler(event)">
</mx:Label>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn id="sheetStep" headerText="当前环节" dataField="currentState">
<mx:itemRenderer>
<fx:Component>
<mx:Label toolTip="双击查看工单" doubleClickEnabled="true" doubleClick="outerDocument.label1_clickHandler(event)">
</mx:Label>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="派单时间" dataField="createTime">
<mx:itemRenderer>
<fx:Component>
<mx:Label toolTip="双击查看工单" doubleClickEnabled="true" doubleClick="outerDocument.label1_clickHandler(event)">
</mx:Label>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
<mx:DataGridColumn headerText="要求完成时间" dataField="createTime">
<mx:itemRenderer>
<fx:Component>
<mx:Label toolTip="双击查看工单" doubleClickEnabled="true" doubleClick="outerDocument.label1_clickHandler(event)">
</mx:Label>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>

<mx:DataGridColumn  headerText="派单部门" dataField="createUser">
<mx:itemRenderer>
<fx:Component>
<mx:Label toolTip="双击查看工单" doubleClickEnabled="true" doubleClick="outerDocument.label1_clickHandler(event)">
</mx:Label>
</fx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
</mx:columns>
</mx:DataGrid>
</s:HGroup>
<!-- <ns1:PagingBar  width="100%" id="myPageBar" > 
</ns1:PagingBar> -->
</s:VGroup>
</mx:Panel>
</s:Application>


struts配置

<action name="getAllDoBaseSheet" class="baseSheetAction" method="getAllDoBaseSheet">


java代码
该action实现了ServletRequestAware,ServletResponseAware接口

public void getAllDoBaseSheet() throws Exception{
String account = this.getSessionValue(SessionUtil.accountName);
String userName = this.getSessionValue(SessionUtil.userName);
request.setCharacterEncoding("UTF-8");
response.setContentType("text/html;charset=utf-8;");
log.info("查询代办工单方法执行了");
try{
baseSheetDtolist = baseSheetService.getAllDoBaseSheet(account,userName);
}catch(Exception e){
e.printStackTrace();
}
StringBuffer josn = new StringBuffer();
josn.append("[");
if(baseSheetDtolist!=null && baseSheetDtolist.size()>0){
for(int i=0;i<baseSheetDtolist.size();i++){
BaseSheetDto bsd = (BaseSheetDto)baseSheetDtolist.get(i);
if(i!=baseSheetDtolist.size()-1){
josn.append("{");
josn.append("\"id\":\""+ bsd.getId()+"\",");
josn.append("\"createTime\":\""+ DateTools.convertDateToString(bsd.getCreateTime(), "yyyy-MM-dd")+"\",");
josn.append("\"createUser\":\""+ bsd.getCreateUser()+"\",");
josn.append("\"sheetId\":\""+ bsd.getSheetId()+"\",");
josn.append("\"title\":\""+ bsd.getTitle()+"\",");
josn.append("\"step\":\""+ bsd.getStep()+"\",");
josn.append("\"workItemId\":\""+ bsd.getWorkItemId()+"\",");
log.info(bsd.getProcessDefId());
josn.append("\"processDefId\":\""+ bsd.getProcessDefId()+"\",");
josn.append("\"activityDefId\":\""+ bsd.getActivityDefId()+"\",");
josn.append("\"processInstId\":\""+ bsd.getProcessInstId()+"\",");
josn.append("\"currentState\":\""+ bsd.getCurrentState()+"\"},");
}else{
josn.append("{");
josn.append("\"id\":\""+ bsd.getId()+"\",");
josn.append("\"createTime\":\""+ DateTools.convertDateToString(bsd.getCreateTime(), "yyyy-MM-dd")+"\",");
josn.append("\"createUser\":\""+ bsd.getCreateUser()+"\",");
josn.append("\"sheetId\":\""+ bsd.getSheetId()+"\",");
josn.append("\"title\":\""+ bsd.getTitle()+"\",");
josn.append("\"step\":\""+ bsd.getStep()+"\",");
josn.append("\"workItemId\":\""+ bsd.getWorkItemId()+"\",");
josn.append("\"processDefId\":\""+ bsd.getProcessDefId()+"\",");
josn.append("\"activityDefId\":\""+ bsd.getActivityDefId()+"\",");
josn.append("\"processInstId\":\""+ bsd.getProcessInstId()+"\",");
josn.append("\"currentState\":\""+ bsd.getCurrentState()+"\"}");
}
}
}
josn.append("]");
log.info(josn.toString());
PrintWriter out = response.getWriter();
out.print(josn.toString());
}

评论

1 楼 caomeiliang 2011-11-28  

如果仅仅是因为request的话
remote-object也能获取，所以你这个文章没什么参考价值