Flex4之DataGrid四个的示例【客户端和服务器端】

由于我的DataGrid与JAVA后台交互需要返回JSON格式的字符串，所以需要在客户端来解析JSON串，用到JSON相关类，所以Flex4还缺少一个文件corelib.swc
将corelib.swc拷贝到Flex安装目录的sdks\4.0.0\frameworks\libs下

这个文件导入后重启MyEclipse就可以使用JSON类了

 

1，客户端、服务端

　　（1）客户端分页：将数据一次性取到客户端，客户要看哪一页的数据，显示哪一页的数据。

　　（2）服务端分页：客户要看哪一页的数据，向服务端请求哪一页的数据，客户端将请求到的数据显示给用户（可以在客户端、服务端分别做缓存，加快数据的读取），由于flex本身不具有数据库访问能力，可以考虑通过 WebServices向服务器传递数据，数据的表示形式可以是XML、JSON（本文采用XML的形式）

2，分页表示层的设计

　　（1）页码条中4个按钮；这四个按钮分别为转到第一页，前一页，后一页，最后一页；当这四个按钮中的任意一点被点击时，页码要重绘，当前页码变化；且还要考虑当页码中有第一页时，前两个按钮要隐藏起来；当页码中有最后一页时，后两个按钮要隐藏起来。

　　（2）页码条中页码；当点击页码条中的页码时，DataGrid中更新显示数据即可，当前页码变化。
　（3）显示总页数，总记录数；

　　（4）每页记录数，让用户通过下拉框选择；当用户选择新的每页显示记录数时，页码要重绘，总页数发生变化，当前页码变化。

　　（5）页码输入框，让用户输入任意页码（要检查输入数据是否合法），DataGrid显示页码中的数据，页码要重绘，总页数变化。

　　（6）查看所有；分页中的特殊情况，将每页记数置为记录总数即可达到要求！页码要重绘，总页数发生变化，当前页码变化

代码说明
（1）分页功能条，做一个自定义组件
（2）页码条绘制方法，传参数为页码中的第一个页码
3.分页触发的方法，组件中有一个属性为pagingFunction，为向服务端请求数据的函数；当该函数为空时，调用客户端分页；反之调用该方法进行服务端分页。

 

首先说明下：以下的四个例子中每一个都含有客户端获取DataGrid数据的代码

下面的每个mxml中都涉及用到的组件mxml,位于com/control目录下

<?xml version="1.0" encoding="utf-8"?>
<mx:HBox xmlns:mx="http://www.adobe.com/2006/mxml" backgroundColor="white">
	<mx:Script>
		<![CDATA[
                  import mx.collections.ArrayCollection;
                  import mx.events.ItemClickEvent;
                  import flash.events.KeyboardEvent;
                  import mx.controls.DataGrid;
                  import mx.validators.NumberValidator;

	      		  [Bindable]
				  [Embed(source='assets/first.jpg')]
				  private var firstIcon:Class;				  
				  private var firstPage:uint; 
				  
	      		  [Bindable]
				  [Embed(source='assets/pre.jpg')]
				  private var preIcon:Class;
				  private var prePage:uint; 
			
	      		  [Bindable]
				  [Embed(source='assets/next.jpg')]
				  private var nextIcon:Class;
				  private var nextPage:uint; 

	      		  [Bindable]
				  [Embed(source='assets/last.jpg')]
				  private var lastIcon:Class;
				  private var lastPage:uint;
                           
                  //页码条数据,绑定
                  [Bindable]
                  private var nav:ArrayCollection = new ArrayCollection();
                  
                  //默认起始页码,第1页
                  private var currentPageIndex:uint = 0;
                  
                  //是否已初始化
                  private var isInit:Boolean=true;                  
  				  
  				  //总页数
				  private var totalPages:uint = 0;
				  
				  //是否重绘页码条，当使用服务端分页时使用
				  private var isCreateNavBar:Boolean = true;
				   				  
				  /************************************************************/
				  
                  //显示到Grid的数据
                  [Bindable]
                  public var viewData:ArrayCollection=null;
                  
                  //所有的数据
                  public var orgData:ArrayCollection=null;
                  
                  //每页记录数下拉框
                  public var pageSizeDropDownListData:ArrayCollection=null;
                  
                  // 每页记录数 
                  public var pageSize:uint = 5; 
				                 
                  // 页码条上显示页码的个数
                  public var navSize:uint = 5;
               	  
               	  //记录总数，调用服务端发页时使用
                  public var totalRecord:int=0;
                  
                  //分页函数
                  public var pagingFunction:Function=null;
                  
                  //分页条对应的Grid
                  public var dataGrid:DataGrid=null;
                  
                  /***************************************************************/
                  
                  public function dataBind(isServerSide:Boolean=false):void{
				        //是否初始化
					    if(isInit){
							if(pageSizeDropDownListData==null){
								pageSizeDropDownListData = new ArrayCollection();
								pageSizeDropDownListData.addItem({label:5,data:5});
								pageSizeDropDownListData.addItem({label:10,data:10});
								pageSizeDropDownListData.addItem({label:20,data:20});
								pageSizeDropDownListData.addItem({label:30,data:30});					        
							}
							pageSizeComobox.dataProvider=pageSizeDropDownListData;
							isInit=false;
					    }
					    //					                        					
					    refreshDataProvider(currentPageIndex,isCreateNavBar,pageSize,isServerSide);
                  }
                  
                  
                  
                  /**
					* 构建页码条
                  	* pages:总页数
                  	* pageIndex:当前页（注意，从0开始）
                  	*
                   */
                  private function createNavBar(pageIndex:uint = 0):void{
                      nav.removeAll();
                      //向前图标操作,first,Pre
                      if( pageIndex > 1 ){
                            firstPage=0;
                            firstNavBtn.visible=true;
                            //
                            var intLFive:int = pageIndex-navSize; // calculate start of last 5;
                            //
                            prePage=intLFive;
                            preNavBtn.visible=true;
                      }
                      else{
                        	firstNavBtn.visible=false;
                        	preNavBtn.visible=false;
                      }
                      //页码条        
                      for( var x:uint = 0; x < navSize; x++){
                            var pg:uint = x + pageIndex;
                            nav.addItem({label: pg + 1,data: pg});
							//	
							var pgg:uint = pg+1;
							if(pgg>=totalPages){ //搜索到最后一个页码，停止添加到navbar
								x=navSize; 
							}
                      }
					  //计算最后一组页码条中第一个页码的页码编号
					  var lastpage:Number = 0;
					  for( var y:uint = navSize; y <= totalPages-1;y = y + navSize ){ //lets calculate the lastpage button
						  	if(y+5 > navSize){
						  		lastpage = y;
						  	}
					  }					  
					  //向后图标
                      if( pg < totalPages - 1 ){
                            nextPage=pg + 1;
                            nextNavBtn.visible=true;
                            lastPage=lastpage;
                      		lastNavBtn.visible=true;
                      }
                      else{                              
                      		nextNavBtn.visible=false;
                      		lastNavBtn.visible=false;
                      }
                  }
                  
                  /**
                  * 页码按钮按下(页码条点击)
                  */ 
                  private function navigatePage(event:ItemClickEvent):void
                  {
                        refreshDataProvider(event.item.data,false);   
                  }
                  
                  /**
                  * 页码按钮按下,first,pre,next,last
                  */ 
                  private function navigateButtonClick(pageString:String):void{
                  		var pageIndex:uint=0;
                  		switch(pageString){
                  			case "firstPage":
                  				pageIndex=firstPage;
                  				break;
                  			case "prePage":
                  				pageIndex=prePage;
                  				break;
                  			case "nextPage":
                  				pageIndex=nextPage;
                  				break;
                  			default:	//lastPage
                  				pageIndex=lastPage;
                  		}
                  		//
                  		refreshDataProvider(pageIndex);
                  }
                  
                  /**
                  * 更新数据源,更新表格显示数据
                  */ 
                  private function refreshDataProvider(pageIndex:uint,isCreateNavBar:Boolean=true,pageSize:uint=0,resultReturn:Boolean=false):void{
	                  //分页函数
	                  if(dataGrid==null) return;
	                  currentPageIndex=pageIndex;
			          if(pageSize==0){
			          		pageSize=this.pageSize;	
			          }else{
			          		this.pageSize=pageSize;
			         		if(!resultReturn) totalPages = Math.ceil(orgData.length/pageSize);
			          }	                  
	                  if(!resultReturn){	                  		  			             		                  	
			                  if(this.pagingFunction!=null){
									pagingFunction(pageIndex,pageSize);
									this.isCreateNavBar=isCreateNavBar;	
			                  }
			                  else{
			                  		viewData = new ArrayCollection( orgData.source.slice((pageIndex * pageSize),(pageIndex * pageSize) + pageSize) );                  	
			                  		dataGrid.dataProvider=viewData;
			                  		pageNumber.text=(pageIndex+1).toString();
			               	  		
			              	  		totalRecordLabel.text = '总记录数：' + orgData.length.toString();				              	  		                  
			                  }
	                  }
	                  else{
	                  		dataGrid.dataProvider=orgData;
	                  		totalPages = Math.ceil(totalRecord/pageSize);
	                  		pageNumber.text=(pageIndex+1).toString();
	                  		totalRecordLabel.text = '总记录数：' + totalRecord.toString()			
	                  }
	                  totalPagesLabel.text = '总页数：' + totalPages;
	                  if(isCreateNavBar) createNavBar(pageIndex);
                  }
                  //
                  /**
                  * 每页记录数变更（下拉框选择）
                  */ 
                  private function pageSizeSelectChange():void{
                  		refreshDataProvider(0,true,uint(pageSizeComobox.value));
                  }                
                  /**
                  * 页码变更（直接输入）
                  */ 
                  private function pageIndexInsertChange(event:Event):void{
                  		var keyboardEvent:KeyboardEvent=event as KeyboardEvent;
                  		if(keyboardEvent!=null&&keyboardEvent.keyCode== Keyboard.ENTER){
                  			var pageIndex:uint=uint(pageNumber.text)-1;
                  			if(pageIndex>0&&pageIndex<totalPages&&pageIndex!=currentPageIndex){
                   				refreshDataProvider(pageIndex);
                   			}
                   			else{                				
                   				pageNumber.text = (currentPageIndex+1).toString();
                   			}
                  		}
                  }     
                  /**
                  * 查看所有
                  */ 
                  private function viewAll():void{
                  		var tempTotalRecord:uint=0;               
						if(pagingFunction!=null) tempTotalRecord=totalRecord;
						else tempTotalRecord=orgData.length;
						//
						pageSizeComobox.text=tempTotalRecord.toString();
						pageSizeComobox.selectedIndex=-1;
						refreshDataProvider(0,true,tempTotalRecord);
                  }
		]]>
	</mx:Script>
    <mx:HBox paddingTop="8">
		<mx:Button id="firstNavBtn" icon="{firstIcon}" width="10" height="10" click="navigateButtonClick('firstPage');" />
	    <mx:Button id="preNavBtn" icon="{preIcon}" width="7" height="10" click="navigateButtonClick('prePage');"/>
	</mx:HBox>
	<mx:LinkBar id="pageNav" itemClick="navigatePage(event)" dataProvider="{nav}"/>
	<mx:HBox paddingTop="8">
	    <mx:Button id="nextNavBtn" icon="{nextIcon}" width="7" height="10" click="navigateButtonClick('nextPage');"/>
	    <mx:Button id="lastNavBtn" icon="{lastIcon}" width="10" height="10" click="navigateButtonClick('lastPage');"/>
	</mx:HBox>
	<mx:VRule height="25"/>
	<mx:Label paddingTop="3" id="totalPagesLabel" text=""/>
	<mx:Label paddingTop="3" id="totalRecordLabel" text=""/>
	<mx:Label paddingTop="3" text="每页记录:"/>
	<mx:ComboBox id="pageSizeComobox" cornerRadius="0" paddingLeft="0" fontWeight="normal" width="50" arrowButtonWidth="10" change="pageSizeSelectChange()"/>
	<mx:Label paddingTop="3" text="页码:"/>
	<mx:TextInput id="pageNumber" width="40" keyDown="pageIndexInsertChange(event);"/>
	<mx:LinkButton id="viewAllLinkBtn" label="查看所有" click="viewAll();"/>	            
</mx:HBox>   

 

 

 

第一：  HTTPService获取服务器端数据显示DataGrid

         HTTPService的方式一

         mxml内容

     

<?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/mx"
			   xmlns:control="com.control.*" 
			   creationComplete="creationCompleteHandle();myservice.send()"
			   minWidth="955" minHeight="600">
	<fx:Style>
		Application{
			fontSize:12;
		}
	</fx:Style>
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 这个HTTPService使用时一定要提前调用send方法-->
		<s:HTTPService id="myservice" url="http://localhost:8080/ClientServerDataGrid/find.do" result="myservice_resultHandler(event)" />
	</fx:Declarations>
	
	<fx:Script>
		<![CDATA[
			import com.adobe.serialization.json.JSON;
			
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
			
			private var pageIndex:int=0;
			
			private var pageSize:int=5;
			
			private function creationCompleteHandle():void{
				var orgData:ArrayCollection = new ArrayCollection();
				for( var x:uint = 1; x <= 555; x++ )
				{
					var obj:Object = new Object();
					obj.ID = "id " + x.toString();
					obj.Code="order "+x;
					obj.Total=x*1000;
					obj.Customer= "customer "+x;
					obj.Register = "employee";
					obj.Memo="memo "+x;	            	
					obj.State="auditing state";	            	
					orgData.addItem(obj);
				}
				clientPagingBar1.dataGrid=DataGrid1;
				clientPagingBar1.orgData=orgData;
				clientPagingBar1.dataBind();
				
				
			}
			
		
			
			
			 protected function myservice_resultHandler(event:ResultEvent):void
			{
			var rawData:String = String(event.result);  
			//decode the data to ActionScript using the JSON API  
			//in this case, the JSON data is a serialize Array of Objects.
			
			var arr:Array = (JSON.decode(rawData) as Array);  
			var dataArray:ArrayCollection = new ArrayCollection(arr); 
			//Alert.show(dataArray.getItemAt(0).id);
			clientPagingBar2.dataGrid=DataGrid2;
			clientPagingBar2.orgData=dataArray;
			clientPagingBar2.dataBind();
			} 
			
		]]>
	</fx:Script>
	
	<mx:VBox>		
		<mx:Label text="客户端分页" />
		<mx:Canvas backgroundColor="white">
			<mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalScrollPolicy="off" horizontalScrollPolicy="off">
				<mx:DataGrid id="DataGrid1" verticalScrollPolicy="on" horizontalScrollPolicy="off">
					<mx:columns>
						<mx:DataGridColumn headerText="订单ID" dataField="ID" />
						<mx:DataGridColumn headerText="订单编码" dataField="Code" />
						<mx:DataGridColumn headerText="金额" dataField="Total" />
						<mx:DataGridColumn headerText="客户" dataField="Customer" />
						<mx:DataGridColumn headerText="销售员" dataField="Register" />
						<mx:DataGridColumn headerText="备注说明" dataField="Memo" />
						<mx:DataGridColumn headerText="状态" dataField="State" />		    	
					</mx:columns>
				</mx:DataGrid>
				<control:PagingBar id="clientPagingBar1" />
			</mx:VBox>
		</mx:Canvas>
		
		<mx:Label text="服务器端分页" />
		<mx:Canvas backgroundColor="white">
			<mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalScrollPolicy="off" horizontalScrollPolicy="off">
				<mx:DataGrid id="DataGrid2" verticalScrollPolicy="on" horizontalScrollPolicy="off">
					<mx:columns>
						<mx:DataGridColumn headerText="订单ID" dataField="id" />
						<mx:DataGridColumn headerText="订单编码" dataField="code" />
						<mx:DataGridColumn headerText="金额" dataField="total" />
						<mx:DataGridColumn headerText="客户" dataField="customer" />
						<mx:DataGridColumn headerText="销售员" dataField="register" />
						<mx:DataGridColumn headerText="备注说明" dataField="memo" />
						<mx:DataGridColumn headerText="状态" dataField="state" />		    	
					</mx:columns>
				</mx:DataGrid>
				<control:PagingBar id="clientPagingBar2" />
			</mx:VBox>
		</mx:Canvas>
	</mx:VBox>
	
</s:Application>

 

     HTTPService的方式二

  

<?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/mx"
			   xmlns:control="com.control.*" 
			   creationComplete="creationCompleteHandle()"
			   minWidth="955" minHeight="600">
	<fx:Style>
		Application{
			fontSize:12;
		}
	</fx:Style>
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 这个HTTPService使用时一定要提前调用send方法-->
		<s:HTTPService id="myservice"  />
	</fx:Declarations>
	
	<fx:Script>
		<![CDATA[
			import com.adobe.serialization.json.JSON;
			
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
			import mx.utils.URLUtil;
			
			private var pageIndex:int=0;
			
			private var pageSize:int=5;
			
			private function creationCompleteHandle():void{
				var orgData:ArrayCollection = new ArrayCollection();
				for( var x:uint = 1; x <= 555; x++ )
				{
					var obj:Object = new Object();
					obj.ID = "id " + x.toString();
					obj.Code="order "+x;
					obj.Total=x*1000;
					obj.Customer= "customer "+x;
					obj.Register = "employee";
					obj.Memo="memo "+x;	            	
					obj.State="auditing state";	            	
					orgData.addItem(obj);
				}
				clientPagingBar1.dataGrid=DataGrid1;
				clientPagingBar1.orgData=orgData;
				clientPagingBar1.dataBind();
				
				myservice.url="http://localhost:8080/ClientServerDataGrid/find.do";
				myservice.showBusyCursor=true;
				myservice.send();
				myservice.addEventListener(ResultEvent.RESULT,hsResultHandler); 
				myservice.addEventListener(FaultEvent.FAULT,hsFaultHandler); 
			}
			private function hsResultHandler(event:ResultEvent):void{   
				var rawData:String = String(event.result);  
				//decode the data to ActionScript using the JSON API  
				//in this case, the JSON data is a serialize Array of Objects.
				
				var arr:Array = (JSON.decode(rawData) as Array);  
				var dataArray:ArrayCollection = new ArrayCollection(arr); 
				//Alert.show(dataArray.getItemAt(0).id);
				clientPagingBar2.dataGrid=DataGrid2;
				clientPagingBar2.orgData=dataArray;
				clientPagingBar2.dataBind();
			}   
			private function hsFaultHandler(e:FaultEvent):void{   
				Alert.show(e.fault.toString(),'http请求错误');   
			}   
			
			
			
		]]>
	</fx:Script>
	
	<mx:VBox>		
		<mx:Label text="客户端分页" />
		<mx:Canvas backgroundColor="white">
			<mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalScrollPolicy="off" horizontalScrollPolicy="off">
				<mx:DataGrid id="DataGrid1" verticalScrollPolicy="on" horizontalScrollPolicy="off">
					<mx:columns>
						<mx:DataGridColumn headerText="订单ID" dataField="ID" />
						<mx:DataGridColumn headerText="订单编码" dataField="Code" />
						<mx:DataGridColumn headerText="金额" dataField="Total" />
						<mx:DataGridColumn headerText="客户" dataField="Customer" />
						<mx:DataGridColumn headerText="销售员" dataField="Register" />
						<mx:DataGridColumn headerText="备注说明" dataField="Memo" />
						<mx:DataGridColumn headerText="状态" dataField="State" />		    	
					</mx:columns>
				</mx:DataGrid>
				<control:PagingBar id="clientPagingBar1" />
			</mx:VBox>
		</mx:Canvas>
		
		<mx:Label text="服务器端分页" />
		<mx:Canvas backgroundColor="white">
			<mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalScrollPolicy="off" horizontalScrollPolicy="off">
				<mx:DataGrid id="DataGrid2" verticalScrollPolicy="on" horizontalScrollPolicy="off">
					<mx:columns>
						<mx:DataGridColumn headerText="订单ID" dataField="id" />
						<mx:DataGridColumn headerText="订单编码" dataField="code" />
						<mx:DataGridColumn headerText="金额" dataField="total" />
						<mx:DataGridColumn headerText="客户" dataField="customer" />
						<mx:DataGridColumn headerText="销售员" dataField="register" />
						<mx:DataGridColumn headerText="备注说明" dataField="memo" />
						<mx:DataGridColumn headerText="状态" dataField="state" />		    	
					</mx:columns>
				</mx:DataGrid>
				<control:PagingBar id="clientPagingBar2" />
			</mx:VBox>
		</mx:Canvas>
	</mx:VBox>
	
</s:Application>

第二：URLRequest方式获取

  mxml内容

   

<?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/mx"
			   xmlns:control="com.control.*" 
			   creationComplete="creationCompleteHandle()"
			   minWidth="955" minHeight="600">
	<fx:Style>
		Application{
			fontSize:12;
		}
	</fx:Style>
	<fx:Declarations>
		<!-- 将非可视元素（例如服务、值对象）放在此处 这个HTTPService使用时一定要提前调用send方法-->
	</fx:Declarations>
	
	<fx:Script>
		<![CDATA[
			import com.adobe.serialization.json.JSON;
			
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
			import mx.utils.URLUtil;
			
			private var pageIndex:int=0;
			
			private var pageSize:int=5;
			
			private function creationCompleteHandle():void{
				var orgData:ArrayCollection = new ArrayCollection();
				for( var x:uint = 1; x <= 555; x++ )
				{
					var obj:Object = new Object();
					obj.ID = "id " + x.toString();
					obj.Code="order "+x;
					obj.Total=x*1000;
					obj.Customer= "customer "+x;
					obj.Register = "employee";
					obj.Memo="memo "+x;	            	
					obj.State="auditing state";	            	
					orgData.addItem(obj);
				}
				clientPagingBar1.dataGrid=DataGrid1;
				clientPagingBar1.orgData=orgData;
				clientPagingBar1.dataBind();
				
				
				
				
				//var v:URLVariables = new URLVariables("name=jacky&age=35&address=HongKong China");  
				/* 
				也可以是这种方式
				var vars: URLVariables = new URLVariables ();
				vars["varName"] = varValue;	//把参数键,值对放到vars对象中.
				vars["var2Name"] = var2Value; 
				*/	
				var r:URLRequest = new URLRequest();  
				r.url ="http://localhost:8080/ClientServerDataGrid/find.do";  
				r.method = URLRequestMethod.POST;  
				//r.data = v;  
				
				var l:URLLoader = new URLLoader();  		
				l.load(r);  
				
				l.addEventListener(Event.COMPLETE,txtCompleteHandler); //注册请求完成后 响应获取数据事件方法 
			}
			private function txtCompleteHandler(e:Event):void  
			{  
				
				var l:URLLoader = URLLoader(e.target);  
				/* URLUtil的stringToObject方法解释
				从字符串返回对象。字符串包含 name=value 对，它们成为返回对象的动态属性。这些属性对由指定的 separator 分隔。该方法可转换数字、布尔值、数组（由“[]”定义）以及子类（由“{}”定义）。默认情况下，%XX 格式的 URL 模式将转换为相应的字符串字符。 
				例如： 
				var s:String = "name=Alex;age=21";
				var o:Object = URLUtil.stringToObject(s, ";", true);		
				返回对象：{ name: "Alex", age: 21 }。
				*/
				//直接获取返回值内容:  URLLoader(e.target).data
				//				Alert.show(l.data);
				//				var o:Object = URLUtil.stringToObject(l.data,";",true); //使用URLUtil对将数据进行反序列化以方便使用  
				
				
				var rawData:String = String(l.data);  
				//decode the data to ActionScript using the JSON API  
				//in this case, the JSON data is a serialize Array of Objects.
				
				var arr:Array = (JSON.decode(rawData) as Array);  
				var dataArray:ArrayCollection = new ArrayCollection(arr); 
				//Alert.show(dataArray.getItemAt(0).id);
				clientPagingBar2.dataGrid=DataGrid2;
				clientPagingBar2.orgData=dataArray;
				clientPagingBar2.dataBind();
			}  
			
			
		]]>
	</fx:Script>
	
	<mx:VBox>		
		<mx:Label text="客户端分页" />
		<mx:Canvas backgroundColor="white">
			<mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalScrollPolicy="off" horizontalScrollPolicy="off">
				<mx:DataGrid id="DataGrid1" verticalScrollPolicy="on" horizontalScrollPolicy="off">
					<mx:columns>
						<mx:DataGridColumn headerText="订单ID" dataField="ID" />
						<mx:DataGridColumn headerText="订单编码" dataField="Code" />
						<mx:DataGridColumn headerText="金额" dataField="Total" />
						<mx:DataGridColumn headerText="客户" dataField="Customer" />
						<mx:DataGridColumn headerText="销售员" dataField="Register" />
						<mx:DataGridColumn headerText="备注说明" dataField="Memo" />
						<mx:DataGridColumn headerText="状态" dataField="State" />		    	
					</mx:columns>
				</mx:DataGrid>
				<control:PagingBar id="clientPagingBar1" />
			</mx:VBox>
		</mx:Canvas>
		
		<mx:Label text="服务器端分页" />
		<mx:Canvas backgroundColor="white">
			<mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalScrollPolicy="off" horizontalScrollPolicy="off">
				<mx:DataGrid id="DataGrid2" verticalScrollPolicy="on" horizontalScrollPolicy="off">
					<mx:columns>
						<mx:DataGridColumn headerText="订单ID" dataField="id" />
						<mx:DataGridColumn headerText="订单编码" dataField="code" />
						<mx:DataGridColumn headerText="金额" dataField="total" />
						<mx:DataGridColumn headerText="客户" dataField="customer" />
						<mx:DataGridColumn headerText="销售员" dataField="register" />
						<mx:DataGridColumn headerText="备注说明" dataField="memo" />
						<mx:DataGridColumn headerText="状态" dataField="state" />		    	
					</mx:columns>
				</mx:DataGrid>
				<control:PagingBar id="clientPagingBar2" />
			</mx:VBox>
		</mx:Canvas>
	</mx:VBox>
	
</s:Application>

 

针对上面两种方式的servlet处理类为

  

package com.test;

import java.io.IOException;
import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import net.sf.json.JSONArray;

public class FindDataServlet extends HttpServlet {

	
	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
             this.doPost(request, response);
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		System.out.println("执行Servlet了哦。。。。。。。。。。。。");
		List<MyObject> orgData=new ArrayList<MyObject>();
		for(int x= 1; x <= 555; x++ )
		{
			MyObject ob=new MyObject();
			ob.setId("CHENEY"+x);
	        ob.setCode("HENAN"+x);
			ob.setTotal(x*10);
			ob.setCustomer("CUS"+x);
			ob.setRegister("EMP"+x);
            ob.setMemo("MEMO"+x);
			ob.setState("STATE"+x);
			orgData.add(ob);
		}
	   JSONArray json=JSONArray.fromObject(orgData);
	   String datas=json.toString();
	   System.out.println(datas);
	   response.getWriter().write(datas);
	}

}

 当然这里JAVA程序也用到JSON相关类，一般要使用JSON的话要使用到六个包

 

 第三：RemoteObject 获取方式

    mxml内容

   

<?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/mx"
			   xmlns:control="com.control.*" 
			   creationComplete="creationCompleteHandle()"
			   minWidth="955" minHeight="600">
	<fx:Style>
		Application{
			fontSize:12;
		}
	</fx:Style>
	<fx:Declarations>
		<s:RemoteObject id="findData" destination="findData" result="findDate_resultHandler(event)"/>
	</fx:Declarations>
	
	<fx:Script>
		<![CDATA[
			import com.adobe.serialization.json.JSON;
			
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
			
			private var pageIndex:int=0;
			
			private var pageSize:int=5;
			
			private function creationCompleteHandle():void{
				var orgData:ArrayCollection = new ArrayCollection();
				for( var x:uint = 1; x <= 555; x++ )
				{
					var obj:Object = new Object();
					obj.ID = "id " + x.toString();
					obj.Code="order "+x;
					obj.Total=x*1000;
					obj.Customer= "customer "+x;
					obj.Register = "employee";
					obj.Memo="memo "+x;	            	
					obj.State="auditing state";	            	
					orgData.addItem(obj);
				}
				clientPagingBar1.dataGrid=DataGrid1;
				clientPagingBar1.orgData=orgData;
				clientPagingBar1.dataBind();
				
				
				findData.findData();
			}
			
			 protected function findDate_resultHandler(event:ResultEvent):void
			{
				 var rawData:String = String(event.result);  
				 //decode the data to ActionScript using the JSON API  
				 //in this case, the JSON data is a serialize Array of Objects.
				 
				 var arr:Array = (JSON.decode(rawData) as Array);  
				 var dataArray:ArrayCollection = new ArrayCollection(arr); 
				 //Alert.show(dataArray.getItemAt(0).id);
				 clientPagingBar2.dataGrid=DataGrid2;
				 clientPagingBar2.orgData=dataArray;
				 clientPagingBar2.dataBind();
			} 
			

		

		]]>
	</fx:Script>
	
	<mx:VBox>		
		<mx:Label text="客户端分页" />
		<mx:Canvas backgroundColor="white">
			<mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalScrollPolicy="off" horizontalScrollPolicy="off">
				<mx:DataGrid id="DataGrid1" verticalScrollPolicy="on" horizontalScrollPolicy="off">
					<mx:columns>
						<mx:DataGridColumn headerText="订单ID" dataField="ID" />
						<mx:DataGridColumn headerText="订单编码" dataField="Code" />
						<mx:DataGridColumn headerText="金额" dataField="Total" />
						<mx:DataGridColumn headerText="客户" dataField="Customer" />
						<mx:DataGridColumn headerText="销售员" dataField="Register" />
						<mx:DataGridColumn headerText="备注说明" dataField="Memo" />
						<mx:DataGridColumn headerText="状态" dataField="State" />		    	
					</mx:columns>
				</mx:DataGrid>
				<control:PagingBar id="clientPagingBar1" />
			</mx:VBox>
		</mx:Canvas>
		
		<mx:Label text="服务器端分页" />
		<mx:Canvas backgroundColor="white">
			<mx:VBox width="100%" height="100%" paddingBottom="10" paddingLeft="10" paddingRight="10" paddingTop="10" verticalScrollPolicy="off" horizontalScrollPolicy="off">
				<mx:DataGrid id="DataGrid2" verticalScrollPolicy="on" horizontalScrollPolicy="off">
					<mx:columns>
						<mx:DataGridColumn headerText="订单ID" dataField="id" />
						<mx:DataGridColumn headerText="订单编码" dataField="code" />
						<mx:DataGridColumn headerText="金额" dataField="total" />
						<mx:DataGridColumn headerText="客户" dataField="customer" />
						<mx:DataGridColumn headerText="销售员" dataField="register" />
						<mx:DataGridColumn headerText="备注说明" dataField="memo" />
						<mx:DataGridColumn headerText="状态" dataField="state" />		    	
					</mx:columns>
				</mx:DataGrid>
				<control:PagingBar id="clientPagingBar2" />
			</mx:VBox>
		</mx:Canvas>
	</mx:VBox>
	
</s:Application>

 

  web-info/flex/remote-config.xml

  

<?xml version="1.0" encoding="UTF-8"?>
<service id="remoting-service" 
    class="flex.messaging.services.RemotingService">

    <adapters>
        <adapter-definition id="java-object" class="flex.messaging.services.remoting.adapters.JavaAdapter" default="true"/>
    </adapters>

    <default-channels>
        <channel ref="my-amf"/>
    </default-channels>
     <destination id="findData" >
     <properties>
        <source>com.test.FindGridData</source>
     </properties>
     </destination>
</service>

  处理类

 

package com.test;

import java.util.ArrayList;
import java.util.List;

import net.sf.json.JSONArray;

public class FindGridData {

	public String findData(){
		System.out.println("执行我了。。。。。。。。。。。。。。。");
		List<MyObject> orgData=new ArrayList<MyObject>();
		for(int x= 1; x <= 555; x++ )
		{
			MyObject ob=new MyObject();
			ob.setId("CHENEY"+x);
	        ob.setCode("HENAN"+x);
			ob.setTotal(x*10);
			ob.setCustomer("CUS"+x);
			ob.setRegister("EMP");
            ob.setMemo("MEMO"+x);
			ob.setState("STATE");
			orgData.add(ob);
		}
		 JSONArray json=JSONArray.fromObject(orgData);
		   String datas=json.toString();
		   System.out.println(datas);
	  return datas;
	}
	
}

 

   四种方式显示图效果一样

 

 

最后附上corelib.swc和java相关的json必须jar包