地球已经调至震动状态使用flex中的httpservice方法与java进行交互： 

 

一、写服务器: 

1.在myeclipse中建立web项目 

2.写一个用来打印xml的servlet 

3.当使用httpservice与java进行交互的时候不用改写remoting-config.xml文件 

4.web.xml文件中配置servlet的访问地址(一般不用配置，当一个servlet建好之后myeclipse就会自动配置好web.xml文 件，不用去改动，但是需要注意的是，当你在导入blazeds开发文件的时候他会改动web.xml文件，这时候你一定要将web.xml文件改过来，要 不然flex在访问服务器的时候则反问不到你的servlet)。 

5.当你的服务器端的servlet写好之后再去建立flex 项目，并且根据你之前建好的servlet项目在flex项目的属性项中配置flex服务器的访问地址。 

6.写flex的mxml文件。 

 

二、一个简单案例： 

1.servlet源代码 

 代码如下:

package com.wle.flex.HttpService.java文件源代码 

 

package com.wle.flex; 

 

import java.io.IOException; 

import java.io.Writer; 

 

import javax.servlet.ServletException; 

import javax.servlet.http.HttpServlet; 

import javax.servlet.http.HttpServletRequest; 

import javax.servlet.http.HttpServletResponse; 

 

public class HttpService01 extends HttpServlet { 

 

public void doGet(HttpServletRequest request, HttpServletResponse response) 

throws ServletException, IOException { 

 

response.setContentType("text/xml;charset=utf-8"); 

Writer out = response.getWriter(); 

out.write("<?xml version='1.0' encoding='utf-8'?>"); 

out.write("<item>"); 

out.write("<student name='林冲' age='23' class='水泊梁山一班'/>"); 

out.write("<student name='李逵' age='24' class='水泊梁山二班'/>"); 

out.write("<student name='扈三娘' age='23' class='水泊梁山一班'/>"); 

out.write("<student name='时迁' age='24' class='水泊梁山二班'/>"); 

out.write("<student name='武松' age='23' class='水泊梁山一班'/>"); 

out.write("<student name='燕青' age='24' class='水泊梁山二班'/>"); 

out.write("</item>"); 

} 

public void doPost(HttpServletRequest request, HttpServletResponse response) 

throws ServletException, IOException { 

this.doGet(request, response); 

} 

} 

 

2.servlet对应的web.xml文件 

代码如下:

<?xml version="1.0" encoding="UTF-8"?> 

<web-app version="3.0" 

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_3_0.xsd"> 

<display-name></display-name> 

<servlet> 

<description>This is the description of my J2EE component</description> 

<display-name>This is the display name of my J2EE component</display-name> 

<servlet-name>HttpService01</servlet-name> 

<servlet-class>com.wle.flex.HttpService01</servlet-class> 

</servlet> 

 

<servlet-mapping> 

<servlet-name>HttpService01</servlet-name> 

<url-pattern>/wl/HttpService01</url-pattern> 

</servlet-mapping> 

 

</web-app> 

 

3.在webroot目录下导入blazeds文件 

 

4.发布servlet项目 

比如讲servlet项目发布到D:/Tomcat 6.0/webapps/flex_service_HttpService这个文件下 

 

5.建立flex项目 

建好flex项目之后，在项目上右键单击选择属性，在属性中的flex服务器选项中设置flex服务器的地址 

配置信息如下: 

文件根目录:D:/Tomcat 6.0/webapps/flex_service_HttpService 

根URL(U)：http://localhost:8089/flex_service_HttpService 

上下文根目录:/flex_service_HttpService 

6.配置好flex项目的服务器之后就开始写flex源文件，如下： 

代码如下:

<?xml version="1.0" encoding="utf-8"?> 

<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" 

layout="vertical" 

fontSize="12" viewSourceURL="srcview/index.html" xmlns:s="library://ns.adobe.com/flex/spark"> 

 

<!--<mx:Style source="DGtoExcel.css"/>--> 

 

 

<mx:Script> 

<![CDATA[ 

import mx.collections.ArrayCollection; 

import mx.controls.Alert; 

import mx.events.FlexEvent; 

import mx.events.ItemClickEvent; 

import mx.rpc.events.FaultEvent; 

 

[Bindable] 

private var myAC:ArrayCollection; 

 

private function faultHandler(event:FaultEvent):void 

{ 

Alert.show(event.fault.faultString, event.fault.message); 

} 

 

// Function to filter out all items with gender 

private function maleFilterFunc(item:Object):Boolean { 

return item.gender == 1; 

} 

 

// Function to apply the filter function the ICollectionView. 

private function filterMale():void { 

myAC.filterFunction = maleFilterFunc; 

//Refresh the collection view to apply the filter. 

myAC.refresh(); 

} 

 

// Function to filter out all items with gender 

private function femaleFilterFunc(item:Object):Boolean { 

return item.gender == 0; 

} 

 

// Function to apply the filter function the ICollectionView. 

private function filterFemale():void { 

myAC.filterFunction = femaleFilterFunc; 

//Refresh the collection view to apply the filter. 

myAC.refresh(); 

} 

 

// Function to Reset the view to its original state. 

private function resetAC():void { 

myAC.filterFunction = null; 

//Refresh the collection view. 

myAC.refresh(); 

} 

 

 

// Event handler function to display the selected button 

private function filterHandler(event:ItemClickEvent):void { 

switch(event.currentTarget.selectedValue){ 

case 1: 

filterMale(); 

break; 

case 0: 

filterFemale(); 

break; 

case 2: 

resetAC(); 

break; 

default: 

break; 

} 

 

} 

 

protected function bt1_clickHandler():void 

{ 

myService.send(); 

} 

 

]]> 

</mx:Script> 

<mx:HTTPService id="myService" 

showBusyCursor="true" 

url="http://localhost:8089/flex_service_HttpService/wl/HttpService01" 

result="myAC = event.result.item.student" 

fault="faultHandler(event)" 

contentType="application/xml" 

/> 

<mx:HBox> 

<mx:RadioButtonGroup id="gendertype" itemClick="filterHandler(event);"/> 

<mx:RadioButton groupName="gendertype" id="rbMale" value="1" label="男" /> 

<mx:RadioButton groupName="gendertype" id="rbFemale" value="0" label="女" /> 

<mx:RadioButton groupName="gendertype" id="rbAll" value="2" label="所有" /> 

</mx:HBox> 

<mx:DataGrid id="myDG" width="100%" rowCount="20" 

dataProvider="{myAC}" > 

<mx:columns> 

<mx:DataGridColumn headerText="姓名" dataField="name"/> 

<mx:DataGridColumn headerText="年龄" dataField="age" /> 

<mx:DataGridColumn headerText="班级" dataField="class"/> 

</mx:columns> 

</mx:DataGrid> 

<mx:HBox> 

<s:Button id="bt1" label="提交" click="bt1_clickHandler()"/> 

</mx:HBox> 

</mx:Application> 

 

这样就实现了flex到javaee 的交互工作