Flex+struts2+json implementing a Flex and background HTTP service request

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Flex+struts2+json Backstage code I don't say much here. Do not know please read my previous article "Struts2+jquery+json implementation of asynchronous interaction," the article, there is no change in the background.

This focuses on the flex-side implementation code.

The first step:

Download the As3corelib-.92.1.zip file from the http://code.google.com/p/as3corelib/ website and unzip it in as3corelib-.92.1\ There is a AS3CORELIB.SWC file in the As3corelib-.92.1\lib directory that copies the file to the Libs directory of your Flex project. will be able to work. Take a look at the Flex code:

Flex Code Code

2. <?xml version="1.0" encoding="Utf-8"?>
4. <mx:application xmlns:mx="<a href="http://www.adobe.com/2006/mxml">   http://www.adobe.com/2006/mxml</a> "fontsize=" layout= "Absolute">
6. <mx:Script>
8. <! [cdata[
10. Import Com.adobe.serialization.json.JSONDecoder;
12. Import mx.rpc.events.FaultEvent;
14. Import Mx.controls.Alert;
16. Import mx.rpc.events.ResultEvent;
20. Internal function Sendurl (): void{
22. Set the Httpservice URL property to the action connection you want to access after Dd=new Date (). GetTime (); To eliminate browser caching
24. Hs.url = "<a href="http://localhost:8080/fsj/flexstrutsjson!hdlist.action?dd=% +new">http://localhost:8080/fsj/flexstrutsjson!hdlist.action?dd="+new</a> Date   (). GetTime ();
26. Call Httpservice's Send () method
28. Hs.send ();
30. Registering Success Events
32. Hs.addeventlistener (resultevent.result,success);
34. Registering failed Events
36. Hs.addeventlistener (Faultevent.fault,faultresult);
38. }
40. function called by the failed event
42. Internal function Faultresult (event:faultevent): void{
44. Pop-up Failure message
46. Alert.show (Event.fault.message);
48. }
50. Success function
52. Internal function Success (event:resultevent): void{
54. Converts the returned object to a string
56. var userstr:string = event.result.toString ();
58. Convert the string to a Jsondecoder object using the Class Jsondecoder () from the SWC package you just added
60. var userjson:jsondecoder = new Jsondecoder (USERSTR);
62. How to return to map
64. var d:object = Userjson.getvalue (). Uerinfomap;
66. var arryobject:array=[];
68. For each (Var f:object in D) {
70. Arryobject.push (f);
72. //    }
74. Userinfo.dataprovider = Arryobject;
76. Returns how the list is handled
78. Returning an object using the GetValue method of the Jsondecoder object
80. Userinfo.dataprovider = Userjson.getvalue (). Userinfos;
82. }
84. ]]>
86. </mx:Script>
88. <!--Create Httpservice objects--
90. <mx:httpservice id="HS" method="POST" showbusycursor="true"/>
92. <!--Create a Send button and call the Sendurl () function--
94. <mx:button id="requstdate" click="Sendurl ()" label= "send" x=" "y= " "/>"
96. <!--Create a DataGrid control to bind the returned data-
98. <mx:datagrid x=" y=" 131 "width=" 482 "height=" id= "UserInfo">
100. <mx:columns>
102. <mx:datagridcolumn headertext="user name" datafield="userName"/>
104. <mx:datagridcolumn headertext="password" datafield="pwd"/>
106. <mx:datagridcolumn headertext="email " datafield="email"/>
108. <mx:datagridcolumn headertext="Age " datafield= "ages"/>
110. </mx:columns>
112. </mx:DataGrid>
114. </mx:Application>

It is important to note that the method executes more slowly in the case of a large amount of data in JSON.

Related article:Http://www.infoq.com/cn/articles/flex-xml-json

• as3corelib-.92.1.zip (655 KB)

• Flex-side code. RAR (820.9 KB)

• server-side Java code. RAR (3.7 MB)

Flex+struts2+json implementing a Flex and background HTTP service request