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

第一：  HTTPService获取服务器端数据显示DataGrid

         HTTPService的方式一

         mxml内容

     HTTPService的方式二

第二：URLRequest方式获取

  mxml内容

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