flex 前后台类的传递

最新推荐文章于 2025-03-20 11:54:54 发布

转载最新推荐文章于 2025-03-20 11:54:54 发布 · 469 阅读

本文深入探讨了Java与Flex技术在前后端交互中的应用，详细介绍了Java类如何通过添加特定注解与Flex前端进行对接，并通过Flex代码实现数据获取、展示与保存操作。同时，展示了后台类如何定义与实现数据模型，以及如何通过远程调用与前端进行交互。此文章旨在提供一套完整的解决方案，用于理解并实现Java与Flex技术在实际项目中的高效整合。

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前台的as 类：最重要的是要加com.system.domain.FlowType以便前台的类和后台的类对应。

Java代码

package
{
/**
* 描述：
* 创建时间：2012-12-26 上午10:09:29
*/
[ Bindable]
[ RemoteClass( alias= "com.system.domain.FlowType")]
public class FlowType
{
public function FlowType()
{
}
private var _pkId:int;
private var _flowId:int;
private var _typeId:int;
public function get typeId():int
{
return _typeId;
}
public function set typeId(value:int):void
{
_typeId = value;
}
public function get flowId():int
{
return _flowId;
}
public function set flowId(value:int):void
{
_flowId = value;
}
public function get pkId():int
{
return _pkId;
}
public function set pkId(value:int):void
{
_pkId = value;
}
}
}

package
{
	
	/**
	 * 描述：
	 * 创建时间：2012-12-26 上午10:09:29 
	 */
	[ Bindable]
	[ RemoteClass( alias= "com.system.domain.FlowType")]
	public class FlowType
	{
		public function FlowType()
		{
		}
		
		
		private var _pkId:int;
		private var _flowId:int;
		private var _typeId:int;
		
		
		
		public function get typeId():int
		{
			return _typeId;
		}

		public function set typeId(value:int):void
		{
			_typeId = value;
		}

		public function get flowId():int
		{
			return _flowId;
		}

		public function set flowId(value:int):void
		{
			_flowId = value;
		}

		public function get pkId():int
		{
			return _pkId;
		}

		public function set pkId(value:int):void
		{
			_pkId = value;
		}

	}
}

前台的代码：

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/mx"
creationComplete="application1_creationCompleteHandler(event)"
minWidth="955" minHeight="600">
<s:layout>
<s:BasicLayout/>
</s:layout>
<fx:Declarations>
<mx:RemoteObject id="workflowRO" destination="workflowActionDest" fault="faultHandler(event)"/>
</fx:Declarations>
<fx:Script>
<![CDATA[
import mx.collections.ArrayCollection;
import mx.controls.Alert;
import mx.events.FlexEvent;
import mx.rpc.events.FaultEvent;
import mx.rpc.events.ResultEvent;
[ Bindable]
public var flowtypelist:ArrayCollection;
private function faultHandler(event:FaultEvent):void {
Alert.show(event.toString(), 'FaultHandlerError' );
}
protected function application1_creationCompleteHandler(event:FlexEvent):void
{
workflowRO.addEventListener(ResultEvent.RESULT,findflowTypereturn);
workflowRO.findFlowTypes();
}
private function findflowTypereturn(event:ResultEvent):void
{
workflowRO.removeEventListener(ResultEvent.RESULT,findflowTypereturn);
flowtypelist=event.result as ArrayCollection ;
trace(flowtypelist.getItemAt(0));
var ft:FlowType=flowtypelist.getItemAt(0) as FlowType;
trace(ft.flowId);
}
protected function button1_clickHandler(event:MouseEvent):void
{
var ft:FlowType= dg.selectedItem as FlowType;
Alert.show(ft.flowId.toString());
ft.flowId=1000;
workflowRO.addEventListener(ResultEvent.RESULT,chargereturn);
workflowRO.saveFlowTypes(ft);
}
private function chargereturn(event:ResultEvent):void
{
workflowRO.removeEventListener(ResultEvent.RESULT,chargereturn);
}
]]>
</fx:Script>
<s:VGroup>
<s:Button label="添加" click="button1_clickHandler(event)"/>
<mx:DataGrid id="dg" width="500" height="600" dataProvider="{flowtypelist}">
<mx:columns>
<mx:DataGridColumn dataField="flowId" headerText="flowId"/>
<mx:DataGridColumn dataField="pkId" width="100" headerText="pkId"/>
<mx:DataGridColumn dataField="typeId" headerText="typeId"/>
</mx:columns>
</mx:DataGrid>
</s:VGroup>
</s:Application>

<?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"
			   creationComplete="application1_creationCompleteHandler(event)" 
			   minWidth="955" minHeight="600">
	<s:layout>
		<s:BasicLayout/>
	</s:layout>
	<fx:Declarations>
		<mx:RemoteObject id="workflowRO"  destination="workflowActionDest" fault="faultHandler(event)"/>
	</fx:Declarations>
	<fx:Script>
		<![CDATA[
			import mx.collections.ArrayCollection;
			import mx.controls.Alert;
			import mx.events.FlexEvent;
			import mx.rpc.events.FaultEvent;
			import mx.rpc.events.ResultEvent;
			
			[ Bindable]
			public var flowtypelist:ArrayCollection;
			
			private function faultHandler(event:FaultEvent):void {
				Alert.show(event.toString(), 'FaultHandlerError' );
			}

			protected function application1_creationCompleteHandler(event:FlexEvent):void
			{
				workflowRO.addEventListener(ResultEvent.RESULT,findflowTypereturn);
				workflowRO.findFlowTypes();
			}
			
			private function  findflowTypereturn(event:ResultEvent):void
			{
				workflowRO.removeEventListener(ResultEvent.RESULT,findflowTypereturn);
				flowtypelist=event.result as ArrayCollection ;
				trace(flowtypelist.getItemAt(0));
				var ft:FlowType=flowtypelist.getItemAt(0) as FlowType;
				trace(ft.flowId);
			}


			protected function button1_clickHandler(event:MouseEvent):void
			{
				var ft:FlowType= dg.selectedItem as FlowType;
				Alert.show(ft.flowId.toString());
				ft.flowId=1000;
				workflowRO.addEventListener(ResultEvent.RESULT,chargereturn);
				workflowRO.saveFlowTypes(ft);
					
			}
			
			private function  chargereturn(event:ResultEvent):void
			{
				workflowRO.removeEventListener(ResultEvent.RESULT,chargereturn);
			}

		]]>
	</fx:Script>
	<s:VGroup>
		<s:Button label="添加"  click="button1_clickHandler(event)"/>
		<mx:DataGrid id="dg" width="500" height="600"  dataProvider="{flowtypelist}">
			<mx:columns>
				<mx:DataGridColumn dataField="flowId" headerText="flowId"/>
				<mx:DataGridColumn dataField="pkId" width="100" headerText="pkId"/>
				<mx:DataGridColumn dataField="typeId" headerText="typeId"/>
			</mx:columns>
		</mx:DataGrid>
	</s:VGroup>	
</s:Application>

后台对应的类：

Java代码

ackage com.system.domain;
import java.io.Serializable;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.Id;
import javax.persistence.Table;
@Entity
@Table (name = "flow_type")
public class FlowType implements Serializable {
private Integer pkId;
private Integer flowId;
private Integer typeId;
// empty Constructor
public FlowType(){
super();
}
// full Constructor
public FlowType(Integer pkId , Integer flowId , Integer typeId){
super();
this.pkId = pkId;
this.flowId = flowId;
this.typeId = typeId;
}
// auto Constructor
public FlowType(Integer flowId , Integer typeId){
super();
this.flowId = flowId;
this.typeId = typeId;
}
@Id
@GeneratedValue
@Column(name = "pk_id")
public Integer getPkId() {
return pkId ;
}
public void setPkId( Integer pkId ) {
this.pkId = pkId;
}
@Column(name = "flow_id")
public Integer getFlowId() {
return flowId ;
}
public void setFlowId( Integer flowId ) {
this.flowId = flowId;
}
@Column(name = "type_id")
public Integer getTypeId() {
return typeId ;
}
public void setTypeId( Integer typeId ) {
this.typeId = typeId;
}