Flex与服务器通讯有3中方式：HTTPService 组件访问HTTP服务，WebService 组件访问WebService服务，RemoteObject 组件访问Server端对象。第三种方法是最常用最灵活的方法，这种方式通过AMF二进制形式传递数据，需要支持AMF协议的中间件，与java通讯时使用BlazeDS(免费开源)中间件。

新建项目

新建Flex项目，服务器选择J2EE-->BlazeDS，LCDS WAR文件选择blazeds.war文件(下载地址http://download.csdn.net/detail/sjepy/4464788)，完成后在FlexDemo.mxml中添加如下代码：

在Servers视图中添加FlexDemo，启动服务，访问http://localhost:8080/FlexDemo/FlexDemo.html，如果出现空列表则表明项目能正常运行。

使用RemoteObject与java通讯

1.在后台新建EmployeeService，返回员工信息到前台flex

packagedemo.flex.service;

importjava.util.ArrayList;

importjava.util.HashMap;

importjava.util.List;

importjava.util.Map;

publicclassEmployeeService {

publicList getEmpList() {

List empList = newArrayList();

Map emp = null;

for(inti =0; i <5; i++) {

emp = newHashMap();

emp.put("name","name"+ i);

emp.put("age",20+ i);

emp.put("email","email"+ i +"@flex.demo");

empList.add(emp);

}

returnempList;

}

}

package demo.flex.service;

import java.util.ArrayList;

import java.util.HashMap;

import java.util.List;

import java.util.Map;

public class EmployeeService {

public List getEmpList() {

List empList = new ArrayList();

Map emp = null;

for (int i = 0; i < 5; i++) {

emp = new HashMap();

emp.put("name", "name" + i);

emp.put("age", 20 + i);

emp.put("email", "email" + i + "@flex.demo");

empList.add(emp);

}

return empList;

}

}

2.在WEB-INF/flex/remoting-config.xml文件中添加EmployeeService 对应的 destination

demo.flex.service.EmployeeService

demo.flex.service.EmployeeService

3.修改FlexDemo.mxml，通过RemoteObject直接调用后台EmployeeService的getEmpList()方法

xmlns:s="library://ns.adobe.com/flex/spark"

xmlns:mx="library://ns.adobe.com/flex/mx"creationComplete="init()">

import mx.collections.ArrayCollection;

import mx.controls.Alert;

import mx.events.FlexEvent;

import mx.rpc.events.FaultEvent;

import mx.rpc.events.ResultEvent;

[Bindable]

private var empList:ArrayCollection;

protected function empRemote_resultHandler(event:ResultEvent):void

{

empList = event.result as ArrayCollection;

}

protected function empRemote_faultHandler(event:FaultEvent):void

{

Alert.show(event.toString());

}

protected function init():void

{

empRemote.getEmpList();

}

]]>

xmlns:s="library://ns.adobe.com/flex/spark"

xmlns:mx="library://ns.adobe.com/flex/mx" creationComplete="init()">

import mx.collections.ArrayCollection;

import mx.controls.Alert;

import mx.events.FlexEvent;

import mx.rpc.events.FaultEvent;

import mx.rpc.events.ResultEvent;

[Bindable]

private var empList:ArrayCollection;

protected function empRemote_resultHandler(event:ResultEvent):void

{

empList = event.result as ArrayCollection;

}

protected function empRemote_faultHandler(event:FaultEvent):void

{

Alert.show(event.toString());

}

protected function init():void

{

empRemote.getEmpList();

}

]]>

4.重新运行项目，界面显示后台返回的员工信息。如果弹出错误信息：HTTP:Status:url:http://localhost:8080/WebContent/messagebroker/amf....打开项目根目录，修改.flexProperties文件中serverContextRoot="/WebContent"为serverContextRoot="/FlexDemo"，刷新项目重新运行。(注：我在做本测试时没有问题，但做数据推送测试时后台一直收不到前台订阅信息，浪费了很多时间，一直以为是配置问题，最后才发现是serverContextRoot的原因，建议一定修改serverContextRoot)         整合Spring

springframework及依赖包： aopalliance.jar aspectjweaver.jar cglib-nodep-2.1_3.jar(下载地址http://download.csdn.net/detail/sjepy/5516813) org.springframework.aop-3.0.5.RELEASE.jar org.springframework.asm-3.0.5.RELEASE.jar org.springframework.beans-3.0.5.RELEASE.jar org.springframework.context-3.0.5.RELEASE.jar org.springframework.core-3.0.5.RELEASE.jar org.springframework.expression-3.0.5.RELEASE.jar org.springframework.web.servlet-3.0.5.RELEASE.jar org.springframework.web-3.0.5.RELEASE.jar BlazeDS + Spring整合： org.springframework.flex-1.0.3.RELEASE.jar(下载地址http://download.csdn.net/detail/sjepy/5516755)

2.修改web.xml，去掉所有flex相关配置(如果有的话)，添加如下配置：

Spring MVC Dispatcher Servlet

org.springframework.web.servlet.DispatcherServlet

contextConfigLocation

classpath:applicationContext.xml

1

Spring MVC Dispatcher Servlet

/messagebroker/*

Spring MVC Dispatcher Servlet

org.springframework.web.servlet.DispatcherServlet

contextConfigLocation

classpath:applicationContext.xml

1

Spring MVC Dispatcher Servlet

/messagebroker/*

3.在classpath下添加Spring的配置文件applicationContext.xml：

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:flex="http://www.springframework.org/schema/flex"

xmlns:context="http://www.springframework.org/schema/context"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

http://www.springframework.org/schema/flex

http://www.springframework.org/schema/flex/spring-flex-1.0.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-3.0.xsd">

xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"

xmlns:flex="http://www.springframework.org/schema/flex"

xmlns:context="http://www.springframework.org/schema/context"

xsi:schemaLocation="

http://www.springframework.org/schema/beans

http://www.springframework.org/schema/beans/spring-beans-3.0.xsd

http://www.springframework.org/schema/flex

http://www.springframework.org/schema/flex/spring-flex-1.0.xsd

http://www.springframework.org/schema/context

http://www.springframework.org/schema/context/spring-context-3.0.xsd">

4.在EmployeeService上添加注解：

@Component

@RemotingDestination// 把EmployeeService暴露给Flex

@Component

@RemotingDestination// 把EmployeeService暴露给Flex

5.删除WEB-INF/flex下除services-config.xml以外的所有配置文件，修改services-config.xml

前台代码不变，完成后重新运行项目，显示效果和前面一样，至此整合完成。