Flex + LCDS + J2EE Web 项目(2) Hello World

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首先要搭建好开发环境，并且已经能发布、运行Web项目了
如果还没有，参见http://quasimodo-es.iteye.com/admin/blogs/499584

配置Hello World

如新建的项目名为 TestLCDS

1、TestLCDS.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
	
	<mx:RemoteObject id="MyRO" destination="HelloWorldRO"/>
	
	
	<mx:Script>
		<![CDATA[
			private function onClick() : void{
				MyRO.sayHello("  java ");
			}
		]]>
	</mx:Script>
	
	<mx:Button x="220" y="91" label="hello java" click="onClick()"/>
	
</mx:Application>

2、WebRoot/WEB-INF/flex/remoting-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>
    
    <!--  destinations -->
    <destination id="HelloWorldRO">
    	<properties>
    		<source>com.Hello</source> <!-- Java类 -->
    	</properties>
    </destination>
    

</service>

3、

package com;
public class Hello {
	
//	方法必须是public 
	public void sayHello(String str){
		System.out.println("   hello world , and hello  " + str);
	}
	
}

运行项目，点击" hello java"Button ，在控制台就可以看到
打印出的
hello world , and hello    java

分析一下控制台的输出，可以看到Flex和J2EE是怎么通信的：

[LCDS]Channel endpoint my-amf received request.
[LCDS]Deserializing AMF/HTTP request
Version: 3
  (Message #0 targetURI=null, responseURI=/2)
    (Array #0)
      [0] = (Typed Object #0 'flex.messaging.messages.RemotingMessage')
        operation = "sayHello"
        source = null
        body = (Array #1)
          [0] = "  java "
        messageId = "7DB329E0-34BE-658E-5D84-82242C0DDD0A"
        clientId = "21AEFB2F-101E-8EC5-A34B-86785A7ED457"
        timeToLive = 0
        timestamp = 0
        destination = "HelloWorldRO"
        headers = (Object #2)
          DSId = "nil"
          DSEndpoint = "my-amf"

   hello world , and hello    java
[LCDS]Adapter 'java-object' called 'com.Hello.sayHello(java.util.Arrays$ArrayList (Collection size:1)
  [0] =   java
)'
[LCDS]Result: 'null'
[LCDS]Serializing AMF/HTTP response
Version: 3
  (Message #0 targetURI=/2/onResult, responseURI=)
    (Externalizable Object #0 'DSK')
      1.256313859132E12
(Byte Array #1, Length 16)
(Byte Array #2, Length 16)
(Byte Array #3, Length 16)


如果项目不能和J2EE通信，控制台没有显示通信信息，重新配置Flex Build path 和 Flex Server参数
http://quasimodo-es.iteye.com/blog/486739
建议使用方法2


Flex 和 J2EE之间信息交互：Object 、 array ==
http://quasimodo-es.iteye.com/blog/503830