flex与java通信的小例子二

 适合初学者理解

1，testflex.mxml

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1. <?xml version="1.0" encoding="utf-8"?>  
2. <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009"   
3.                xmlns:s="library://ns.adobe.com/flex/spark"   
4.                xmlns:mx="library://ns.adobe.com/flex/mx"  
5.                creationComplete="init()"  
6.                minWidth="955" minHeight="600">  
7.     <fx:Declarations>  
8.         <!-- 将非可视元素（例如服务、值对象）放 在此处 -->  
9.     </fx:Declarations>  
10.     <fx:Script>  
11.         <!--[CDATA[  
12.             import mx.collections.ArrayCollection;  
13.             import mx.controls.Alert;  
14.             import mx.rpc.events.FaultEvent;  
15.             import mx.rpc.events.ResultEvent;  
16.             import mx.rpc.http.HTTPService;  
17.               
18.             [Bindable]  
19.             private var selectResponse:String= null;  
20.             [Bindable]  
21.             private var arraylist:ArrayCollection = new ArrayCollection([  
22.                 {name:"CN",data:"中文"},  
23.                 {name:"US",data:"英文"},  
24.             ]);  
25.             private function init():void{  
26. //              fService.addEventListener(ResultEvent.RESULT,successhandler);  
27. //              fService.addEventListener(FaultEvent.FAULT,faulthandler);  
28.             }  
29.             private function dropdownlistChangeHandler(event:Event = null):void{  
30.                 var httpservice:HTTPService = new HTTPService();  
31.                 httpservice.resultFormat = "text";  
32.                 httpservice.url = "http://localhost:8080/testjava/flexServlet";  
33.                 httpservice.method = "POST";  
34.                 var param:Object = new Object;  
35.                 param.selects = select.selectedItem.data;  
36.                 httpservice.send(param);  
37.                 httpservice.addEventListener(ResultEvent.RESULT,successhandler);  
38. //              fService.sendRequest(select.selectedItem.data);  
39. //              Alert.show(select.selectedItem.data);  
40.             }  
41.             private function successhandler(event:ResultEvent):void{  
42.                 selectResponse = event.message.body.toString();  
43.                 languages.text = selectResponse;  
44. //              Alert.show(selectResponse);  
45.             }  
46. //          private function faulthandler(event:FaultEvent):void{  
47. //              selectResponse = event.message.toString();  
48. //              languages.text = selectResponse;  
49. //          }  
50.         ]]-->  
51.     </fx:Script>  
52.     <s:DropDownList x="109" y="66" id="select" labelField="name" dataProvider="{this.arraylist}" change="dropdownlistChangeHandler(event)">  
53.     </s:DropDownList>  
54.     <mx:Text id="languages" text="{selectResponse}" x="288" y="198"/>  
55. </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="init()" minWidth="955" minHeight="600"> <fx:Declarations> <!-- 将非可视元素（例如服务、值对象）放在此处 --> </fx:Declarations> <fx:Script> <!--[CDATA[ import mx.collections.ArrayCollection; import mx.controls.Alert; import mx.rpc.events.FaultEvent; import mx.rpc.events.ResultEvent; import mx.rpc.http.HTTPService; [Bindable] private var selectResponse:String= null; [Bindable] private var arraylist:ArrayCollection = new ArrayCollection([ {name:"CN",data:"中文"}, {name:"US",data:"英文"}, ]); private function init():void{ // fService.addEventListener(ResultEvent.RESULT,successhandler); // fService.addEventListener(FaultEvent.FAULT,faulthandler); } private function dropdownlistChangeHandler(event:Event = null):void{ var httpservice:HTTPService = new HTTPService(); httpservice.resultFormat = "text"; httpservice.url = "http://localhost:8080/testjava/flexServlet"; httpservice.method = "POST"; var param:Object = new Object; param.selects = select.selectedItem.data; httpservice.send(param); httpservice.addEventListener(ResultEvent.RESULT,successhandler); // fService.sendRequest(select.selectedItem.data); // Alert.show(select.selectedItem.data); } private function successhandler(event:ResultEvent):void{ selectResponse = event.message.body.toString(); languages.text = selectResponse; // Alert.show(selectResponse); } // private function faulthandler(event:FaultEvent):void{ // selectResponse = event.message.toString(); // languages.text = selectResponse; // } ]]--> </fx:Script> <s:DropDownList x="109" y="66" id="select" labelField="name" dataProvider="{this.arraylist}" change="dropdownlistChangeHandler(event)"> </s:DropDownList> <mx:Text id="languages" text="{selectResponse}" x="288" y="198"/> </s:Application>

2，testjava.java

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1. package servlet;  
2.   
3. import java.io.IOException;  
4. import java.io.PrintWriter;  
5. import java.io.UnsupportedEncodingException;  
6.   
7. import javax.servlet.http.HttpServlet;  
8. import javax.servlet.http.HttpServletRequest;  
9. import javax.servlet.http.HttpServletResponse;  
10.   
11. public class FlexServlet extends HttpServlet {  
12.     /** 
13.      *  
14.      */  
15.     private static final long serialVersionUID = 1L;  
16.   
17.     public FlexServlet() {  
18.         super();  
19.     }  
20.   
21.     protected void doGet(HttpServletRequest request,  
22.             HttpServletResponse response) {  
23.         doPost(request, response);  
24.     }  
25.   
26.     protected void doPost(HttpServletRequest request,  
27.             HttpServletResponse response) {  
28.         try {  
29.             request.setCharacterEncoding("UTF-8");  
30.         } catch (UnsupportedEncodingException e1) {  
31.             // TODO Auto-generated catch block  
32.             e1.printStackTrace();  
33.         }  
34.         String selects = request.getParameter("selects");  
35.         response.setContentType("text/html;charset=UTF-8");  
36.         PrintWriter pout = null;  
37.         try {  
38.             pout = response.getWriter();  
39.         } catch (IOException e) {  
40.             // TODO Auto-generated catch block  
41.             e.printStackTrace();  
42.         }  
43.         pout.print("选择：" + selects);  
44.     }  
45. }  

package servlet; import java.io.IOException; import java.io.PrintWriter; import java.io.UnsupportedEncodingException; import javax.servlet.http.HttpServlet; import javax.servlet.http.HttpServletRequest; import javax.servlet.http.HttpServletResponse; public class FlexServlet extends HttpServlet { /** * */ private static final long serialVersionUID = 1L; public FlexServlet() { super(); } protected void doGet(HttpServletRequest request, HttpServletResponse response) { doPost(request, response); } protected void doPost(HttpServletRequest request, HttpServletResponse response) { try { request.setCharacterEncoding("UTF-8"); } catch (UnsupportedEncodingException e1) { // TODO Auto-generated catch block e1.printStackTrace(); } String selects = request.getParameter("selects"); response.setContentType("text/html;charset=UTF-8"); PrintWriter pout = null; try { pout = response.getWriter(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } pout.print("选择：" + selects); } }

3，web.xml

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1. <?xml version="1.0" encoding="UTF-8"?>  
2. <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee"  
3.     xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"  
4.     xsi:schemaLocation="http://java.sun.com/xml/ns/javaee   
5.     http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd">  
6.     <servlet>  
7.         <servlet-name>flexServlet</servlet-name>  
8.         <servlet-class>servlet.FlexServlet</servlet-class>  
9.     </servlet>  
10.     <servlet-mapping>  
11.         <servlet-name>flexServlet</servlet-name>  
12.         <url-pattern>/flexServlet</url-pattern>  
13.     </servlet-mapping>  
14.     <welcome-file-list>  
15.         <welcome-file>testflex.html</welcome-file>  
16.     </welcome-file-list>  
17. </web-app>  

<?xml version="1.0" encoding="UTF-8"?> <web-app version="2.5" xmlns="http://java.sun.com/xml/ns/javaee" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://java.sun.com/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"> <servlet> <servlet-name>flexServlet</servlet-name> <servlet-class>servlet.FlexServlet</servlet-class> </servlet> <servlet-mapping> <servlet-name>flexServlet</servlet-name> <url-pattern>/flexServlet</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>testflex.html</welcome-file> </welcome-file-list> </web-app>

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