原帖及讨论：http://bbs.bccn.net/thread-227477-1-1.html

  突然看到网上有人在用JavaScript来读取MP3中ID3信息。详细请看!

  我也在网上搜索了用Flex写的实现同样的功能的。详细请看!
  但是我比较熟悉Java.所以也在网上搜索到了用Java实现的读取MP3文件标签信息。代码如下：

import java.io.File;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

public class ReadMp3 {
private SongInfo info = null;
private RandomAccessFile ran = null;
private File file = null;

public ReadMp3() throws FileNotFoundException {
file = new File("simcoder.mp3");
ran = new RandomAccessFile(file, "r");
System.out.println("文件裝載完畢");

}

public static void main(String[] args) throws IOException {
ReadMp3 read = new ReadMp3();
byte[] buffer = new byte[128];

read.ran.seek(read.ran.length() - 128);

read.ran.read(buffer);
SongInfo info = new SongInfo(buffer);
System.out.println("name:" + info.getSongName() + " year:"
+ info.getYear() + " 歌手:" + info.getArtist() + " 專輯名:"
+ info.getAlbum() + " 備注:" + info.getComment());

}
}

 

public class SongInfo {

private final String TAG = "TAG"; // 文件头1-3

private String songName; // 歌曲名4-33

private String artist; // 歌手名34-63

private String album; // 专辑名61-93

private String year; // 年94-97

private String comment; // 备注98-125

private byte r1, r2, r3; // 三个保留位126，127，128

private boolean valid; // 是否合法

public transient String fileName; // 此歌曲对应的文件名,没有封装


public SongInfo(byte[] data) {
if (data.length != 128) {
throw new RuntimeException("数据长度不合法:" + data.length);
}
String tag = new String(data, 0, 3);
// 只有前三个字节是TAG才处理后面的字节

if (tag.equalsIgnoreCase("TAG")) {
valid = true;
songName = new String(data, 3, 30).trim();
artist = new String(data, 33, 30).trim();
album = new String(data, 63, 30).trim();
year = new String(data, 93, 4).trim();
comment = new String(data, 97, 28).trim();
r1 = data[125];
r2 = data[126];
r3 = data[127];
} else {
valid = false;
}
}

public SongInfo() {
}

/**
* 返回是否合法
*
* @return 是否
*/
public boolean isValid() {
return valid;
}

/**
* 得到此对象的128个字节的表示形式
*
* @return
*/
public byte[] getBytes() {
byte[] data = new byte[128];
System.arraycopy(TAG.getBytes(), 0, data, 0, 3);
byte[] temp = songName.getBytes();
System.arraycopy(temp, 0, data, 3, temp.length > 30 ? 30 : temp.length);
temp = artist.getBytes();
System
.arraycopy(temp, 0, data, 33, temp.length > 30 ? 30
: temp.length);
temp = album.getBytes();
System
.arraycopy(temp, 0, data, 63, temp.length > 30 ? 30
: temp.length);
temp = year.getBytes();
System.arraycopy(temp, 0, data, 93, temp.length > 4 ? 4 : temp.length);
temp = comment.getBytes();
System
.arraycopy(temp, 0, data, 97, temp.length > 28 ? 28
: temp.length);
data[125] = r1;
data[126] = r2;
data[127] = r3;
return data;
}

public String getArtist() {
return artist;
}

public void setArtist(String authorName) {
this.artist = authorName;
}

public String getComment() {
return comment;
}

public void setComment(String comment) {
this.comment = comment;
}

public byte getR1() {
return r1;
}

public void setR1(byte r1) {
this.r1 = r1;
}

public byte getR2() {
return r2;
}

public void setR2(byte r2) {
this.r2 = r2;
}

public byte getR3() {
return r3;
}

public void setR3(byte r3) {
this.r3 = r3;
}

public String getSongName() {
return songName;
}

public void setSongName(String songName) {
if (songName == null) {
throw new NullPointerException("歌名不能是null!");
}
valid = true;
this.songName = songName;
}

public String getAlbum() {
return album;
}

public void setAlbum(String specialName) {
this.album = specialName;
}

public String getYear() {
return year;
}

public void setYear(String year) {
this.year = year;
}

}

 

执行结果如下： name:简单程序员 year:2008 歌手:编曲.后期：丙峰 專輯名:电话：011186 備注:QQ ：5104

原文地址 http://xiangzi527.spaces.live.com/Blog/cns!D510D99107C879F4!123.entry

  前面已经介绍如何使用Flex,java,json来更新datagrid中的数据。详细请见：使用Flex,Java，Json更新Mysql数据【1】 和 使用Flex,Java，Json更新Mysql数据 【2】 。但是有一个问题就是在更新的时候都是发送整个datagrid的dataprovider中信息到数据库，无论有的资料并没有需要更新，这样处理起来效率就很低了。所在在高级篇中我想传递的数据只是用户更新的那部分。这样效率就会明显提高了。

 

 首先还是来看后台处理：这次我们除了原有的更新数据的功能，我们将增加删除功能【用户通过delete键删除datagrid中行】。我们的数据传输格式还是json.所以在后台读取的部分保持不变，数据格式更前面的一样，主要是修改更新那部分：

 

public String sendJsonArray(String jsonData){
        String result= new String();
        //jsonData = jsonData.replace("\\", "");

       JSONArray jsonArray = JSONArray.fromObject(jsonData);
      System.out.println(jsonArray.toString());
       try{
           Connection conToDb = conToDB();
           Statement stmt = conToDb.createStatement();
       for(int i=0;i<jsonArray.size();i++){
           JSONObject jsonObject = JSONObject.fromObject(jsonArray.getString(i));
           String operation = jsonObject.getString("operation");

           if(operation.equals("update")){
               String name = jsonObject.getString("name");
               String id = jsonObject.getString("id");
               stmt.executeUpdate("update employee set name='"+name+"' where id='"+id+"'");
               result="恭喜，成功更新"+name+"数据！";
               System.out.println(result);
           }else if(operation.equals("delete")){
               String id = jsonObject.getString("id");
               stmt.executeUpdate("delete from employee where id = '"+id+"'");
                result="恭喜，成功删除"+id+"数据!";
           }
           //String name = jsonObject.getString("name");

           //stmt.executeUpdate("update employee set name='"+name+"' where id='"+id+"'");

       }

        conToDb.close();
       }catch(Exception e){
           result = e.getLocalizedMessage();
       }
      return result;
    }

 我们传递过来的数据经过json解码之后的格式如下：

[{"operation":"delete","id":"MS009"},{"operation":"update","id":"MS008","name":"Luciya6"}]

 

有一个operation选项：这个决定是执行更新还是删除操作，更新就包括id,name了。如果是删除就只有id这个数据。至于数据库操作起来就很简单了。看代码就可以了。操作成功我们有一个返回值：“恭喜，成功更新Luciya6数据！”返回给Flex界面。

接下来解析前台的处理。前台的界面设计还是跟前面的一样，不过增加了一个组件checkbox：用于提供自动更新功能【用户无需手动点击更新按钮】。

<mx:CheckBox id="chkAutoUpdate" x="391" y="268" label="Auto"/>

 原先我们的做法是在dataProvider上直接赋值，那么这次我们就需要另外顶一个类似dataProvider类型的[ArrayCollection]的数组了，这里叫做dataToUpdate;所以在初始化中增加：

private function initDataGrid():void{
      dataArray = new ArrayCollection();
      dataToUpdate = new ArrayCollection;//用来保存用户更新部分数据
          getData.getOperation('getJsonArray').send();
    }

 同时呢，我们开始监听dataProvider中书的数据dataArray的修改的动作。

private function getJsonData(event:ResultEvent):void{
      var rawArray:Array;
      var arraySize:int;
      var rawData:String = event.result as String;
      rawArray = JSON.decode(rawData) as Array;
      dataArray = new ArrayCollection(rawArray);
      arraySize = dataArray.length;
      lblStatus.text="读取成功,总共"+arraySize+"条员工信息";
      dataArray.addEventListener(CollectionEvent.COLLECTION_CHANGE,dataChanged);//监听操作
    }

 

接下来我们定义dataChanged方法：

该方法主要是用来监听修改操作，一旦用户在datagrid中修改数据，就会触发 CollectionEvent.COLLECTION_CHANGE事件，然后根据事件的类型，这里只考虑update类型，如果是update类型执 行记录用户更新的部分资料，然后保存到dataToUpdate数组中：

private function dataChanged(event:CollectionEvent):void{
      var item:Object;
      var updatedObj:Object;
      var i:int;
      if(event.kind == CollectionEventKind.UPDATE){
        for(i=0;i < event.items.length;i++){


          updatedObj = new Object;
          updatedObj.operation = "update"
          updatedObj.id = dgData.selectedItem.id;//get the id

          updatedObj.name =dgData.selectedItem.name;//name
          dataToUpdate.addItem(updatedObj);//push it into array
        }

 这里我们处理完了更新部分，接下来处理键盘的delte事件，首先在dataGrid中添加keyUp事件处理：

<mx:DataGrid id="dgData" toolTip="姓名可编辑" x="10" y="10" width="436" height="250" dataProvider="{dataArray}"
       creationComplete="{initDataGrid()}" editable="true" itemEditEnd="{checkName(event)}" verticalScrollPolicy="on"
        keyUp="checkKeyPress(event)">

 然后具体定义checkKeyPress()事件：

private function checkKeyPress(event:KeyboardEvent):void{
      if(event.keyCode == Keyboard.DELETE){
        var data:ArrayCollection = dgData.dataProvider as ArrayCollection;
        if(dgData.selectedIndex>=0 && dgData.selectedIndex<data.length){
            //save the data before removed
             var updatedObj:Object = new Object;
             updatedObj.operation = "delete";
             updatedObj.id = dgData.selectedItem.id;
             dataToUpdate.addItem(updatedObj);
          data.removeItemAt(dgData.selectedIndex);
        }
      }
    }

 同样把要删除的那行数据先保存到要更新的数组中，然后执行removeItemAt()方法移除那行。这样所有要更新或者要删除的数据都保存在了 dataToUpate数组中。当然我们分别定义了operation的内容，后台程序也会更具operation的内容执行具体的操作。最后是发送数据 给后台程序：我们使用的是remoteObject方法，这里不继续讲了【参考签两篇文章】，给出代码：

private function sendDataAction():void{
      var dataString:String;
      var objSend:Object = new Object();
      if(dataToUpdate.length==0){
          lblStatus.text="没有数据改动...!";
      }else{
      dataString = JSON.encode(dataToUpdate.toArray());
      sendData.sendJsonArray(dataString);
      //clear the dataArray for new operation
      dataToUpdate.removeAll();
      lblStatus.text="正在更新，请稍候...";
      }
    }

 

很简单，把ArrayCollection转化为Array,然后用json的encode方式转化成json格式传输。后台处理也只要更具getString(property)方式拿到对应的值就可以了，参考前面给出的java代码。

效果图：

附件下载：http://download.csdn.net/source/511770

 事前准备就是到http://commons.apache.org 下载common-fileupload-1.1.1.jar以及common-io-1.2.jar两个包。

前台Flex代码：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" xmlns="*" creationComplete="init();">
<mx:Script>
<![CDATA[
import flash.net.FileReference;
import mx.controls.Alert;
import mx.events.CloseEvent;
import flash.events.*;

private var file: FileReference;

private function init(): void{
Security.allowDomain("*");
file = new FileReference();
file.addEventListener(ProgressEvent.PROGRESS, onProgress);
file.addEventListener(Event.SELECT, onSelect);
file.addEventListener(Event.COMPLETE, completeHandle);
}

private function completeHandle(event:Event):void{
    Alert.show("恭喜你，上传成功");
}

private function upload(): void{
var imageTypes:FileFilter = new FileFilter("Images (*.jpg, *.jpeg, *.png)", "*.jpg;*.jpeg;*.png");
var allTypes:Array = new Array(imageTypes);
file.browse(allTypes);
file.browse();
}
private function onSelect(e: Event): void{
Alert.show("上传 " + file.name + " (共 "+Math.round(file.size)+" 字节)?",
"确认上传",
Alert.YES|Alert.NO,
null,
proceedWithUpload);
}

private function onProgress(e: ProgressEvent): void{
lbProgress.text = " 已上传 " + e.bytesLoaded
+ " 字节，共 " + e.bytesTotal + " 字节";
var proc: uint = e.bytesLoaded / e.bytesTotal * 100;
bar.setProgress(proc, 100);
bar.label= "当前进度: " + " " + proc + "%";
}

private function proceedWithUpload(e: CloseEvent): void{
if (e.detail == Alert.YES){
var request: URLRequest = new URLRequest("http://localhost:8080/FileUploaded/FileUploaded");
try {
file.upload(request);
} catch (error:Error) {
trace("上传失败");
}

}
}
]]>
</mx:Script>

<mx:Canvas width="100%" height="100%" x="10" y="170" fontSize="15">
<mx:VBox width="100%" horizontalAlign="center">
<mx:Label id="lbProgress" text="上传"/>
<mx:ProgressBar id="bar" labelPlacement="bottom" themeColor="#F20D7A"
minimum="0" visible="true" maximum="100" label="当前进度: 0%"
direction="right" mode="manual" width="200"/>

<mx:Button label="上传文件" click="upload();"/>
</mx:VBox>
</mx:Canvas>
</mx:Application>

 

http://localhost:8080/FileUploaded/FileUploaded 就是你自己写的servlet的路径了。

接下来写的是Java Servlet:

package upload;
import java.io.File;
import java.io.IOException;
import java.io.PrintWriter;
import java.util.Iterator;
import java.util.List;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.fileupload.FileItem;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

/**
 *
 * @author crystal
 */
public class FileUploaded extends HttpServlet {

    /**
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     */
    // 定义文件的上传路径

    private String uploadPath = "d:\\a\\";

// 限制文件的上传大小

    private int maxPostSize = 100 * 1024 * 1024;

    public FileUploaded() {
        super();
    }

    public void destroy() {
        super.destroy();
    }

    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        System.out.println("Access !");
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();

//保存文件到服务器中

        DiskFileItemFactory factory = new DiskFileItemFactory();
        factory.setSizeThreshold(4096);
        ServletFileUpload upload = new ServletFileUpload(factory);
        upload.setSizeMax(maxPostSize);
        try {
            List fileItems = upload.parseRequest(request);
            Iterator iter = fileItems.iterator();
            while (iter.hasNext()) {
                FileItem item = (FileItem) iter.next();
                if (!item.isFormField()) {
                    String name = item.getName();
                    System.out.println(name);
                    try {
                        item.write(new File(uploadPath + name));
                       // SaveFile s = new SaveFile();

                       // s.saveFile(name);

                    } catch (Exception e) {
                        e.printStackTrace();
                    }
                }
            }
        } catch (FileUploadException e) {
            e.printStackTrace();
            System.out.println(e.getMessage() + "结束");
        }
    }

    // <editor-fold defaultstate="collapsed" desc="HttpServlet methods. Click on the + sign on the left to edit the code.">

    /**
     * Handles the HTTP <code>GET</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     */
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        processRequest(request, response);
    }

    /**
     * Returns a short description of the servlet.
     */
    public String getServletInfo() {
        return "Short description";
    }
    // </editor-fold>

}

 如果使得你的Servlet被访问，你还需要在WEB-INF/web.xml 添加如下的xml语句：[在<web-app>中]

<!-- For file uploaded -->
   <servlet>
        <servlet-name>FileUploaded</servlet-name>
        <servlet-class>upload.FileUploaded</servlet-class>
    </servlet>

    <servlet-mapping>
        <servlet-name>FileUploaded</servlet-name>
        <url-pattern>/FileUploaded</url-pattern>
    </servlet-mapping>

 效果图：

参考：

http://blog.csdn.net/meteorlWJ/archive/2008/06/01/2450234.aspx

http://swingchen.bokee.com/5943371.html

http://www.cnblogs.com/dannyr/archive/2006/11/13/559006.html

在我们开始之前，先来看一个例子：http://scriptplayground.com/article_files/Installing-and-Using-Google-Maps-in-Flex/main.html

本文将介绍如何使用Flex Builder建立一个Flex内嵌Google Map的例子。首先呢,先下载 Google Maps SDK 【解压到某个文件夹内，找到lib内的map_flex_1_1.swc，到时候需要导入Project中 】,以及去申请一个developers API key .【申请的时候需要填写网页地址：如果你使用本地的连接测试：比如http://localhost:8080/GoogleMap ，这样填写就好了，GoogleMap是我们将要建立的一个Flex Project 名字】。打开Flex Builder,新建Flex Project【File > New Flex Project】:GoogleMap 。我使用的BlazeDS建立我的Web形式的Application【使用的服务器是J2EE】。这样最后建立好之后，需要导入map_flex_1_1.swc【右键点击GoogleMap-properties--Flex build path--library path--add swc..】

?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute"
  width="100%" height="100%" initialize="init()">
        
    <mx:Script>
        <![CDATA[
                
        ]]>
    </mx:Script>
        
    <mx:UIComponent id="mapContainer" width="100%" height="100%"/>
    
</mx:Application>

import com.google.maps.Map;
import com.google.maps.MapEvent;
import com.google.maps.MapType;
import com.google.maps.LatLn

private var gMap:Map;

private function init():void
{
    gMap = new Map();
    gMap.key = "{YOUR_API_KEY_HERE}";
    gMap.width = 600;
    gMap.height = 400;
    gMap.addEventListener(MapEvent.MAP_READY, mapReadyHandler);
    
    mapContainer.addChild(gMap);
}

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute" width="100%" height="100%" initialize="init()" viewSourceURL="srcview/index.html">
    
    <mx:Script>
        <![CDATA[
            
            import com.google.maps.Map;
            import com.google.maps.MapEvent;
            import com.google.maps.MapType;
            import com.google.maps.LatLng;
            
            private var gMap:Map;
            
            private function init():void
            {
                gMap = new Map();
                gMap.key = "你申请的key";
                gMap.width = 600;
                gMap.height = 400;
                gMap.addEventListener(MapEvent.MAP_READY, mapReadyHandler);
                
                mapContainer.addChild(gMap);
            }
            
            private function mapReadyHandler(e:MapEvent):void
            {
                gMap.setCenter(new LatLng(42.334184,-71.018372), 13, MapType.HYBRID_MAP_TYPE);
                gMap.setSize(new Point(mapContainer.width, mapContainer.height));
            }
            
        ]]>
    </mx:Script>
    
    <mx:UIComponent id="mapContainer" width="100%" height="100%"/>
    
</mx:Application>

原创作者：mkeefe 。翻译整理：一路风尘

< mx:Application xmlns:mx= “http:/ / www. adobe. com/ 2006/ mxml” viewSourceURL= “srcview/ index. html”>

8.不过都没有什么影响。发布到此结束。

好像Flex3也没有找到可以直接使用的(x,y)的方法来指定Alert窗口的显示位置。但是还是有办法解决这个问题的：

代码1:

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="absolute">
<mx:Script><![CDATA[
  import mx.controls.Alert;
  import mx.managers.PopUpManager;
  private function showAlert():void{
      var alert:Alert = Alert.show("Can you see me on random positions?");
            PopUpManager.centerPopUp (alert);
           var newX:Number = 200;
           var newY:Number = 200;
           callLater (alert.move, [newX, newY]);

  }
]]></mx:Script>
  <mx:Button label="Show Alert" click="showAlert()"/>
</mx:Application>

 代码2：只更改showAlert()方法

private function showAlert():void{
      var alert:Alert = Alert.show("Can you see me on random positions?");
            PopUpManager.centerPopUp (alert);
           var newX:Number = 200;
           var newY:Number = 200;
           //alert.validateNow();

           alert.move(newX,newY);
           //callLater (alert.move, [newX, newY]);


  }

 代码3：添加即时验证：

private function showAlert():void{
      var alert:Alert = Alert.show("Can you see me on random positions?");
            PopUpManager.centerPopUp (alert);
           var newX:Number = 200;
           var newY:Number = 200;
           alert.validateNow();
           alert.move(newX,newY);
           //callLater (alert.move, [newX, newY]);


  }

 原创作者： Abdul Qabiz 。翻译整理：一路风尘

 实现的方法主要是利用MouseEvent.MOUSE_WHEEL事件。在Application中的creationComplete方法中增加以下语句：

systemManager.addEventListener(MouseEvent.MOUSE_WHEEL, onMouseWheel)

 onMouseWheel事件处理器得到这个事件后，我们还需要监听是那个field支持而且触发了滚动事件。需要注意的是MouseEvent的currentTarget并不支持指出当前那个组件是被focus的。但是FocusManager可以帮忙：源代码如下：

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" layout="vertical"
    creationComplete="systemManager.addEventListener(MouseEvent.MOUSE_WHEEL, onMouseWheel)"
    >
    <mx:TextInput id="t1"/>
    <mx:TextInput id="t2"/>  
    <mx:TextArea  id="t3"/>  
    
    <mx:Script>
        <![CDATA[
        import mx.managers.IFocusManagerComponent;
        import mx.managers.SystemManager;
        
        public function onMouseWheel (evt:MouseEvent): void {
            
            var compAtFocus: IFocusManagerComponent = focusManager.getFocus();
            
            // no wheel support unless it's a TextInput field
            if (compAtFocus is TextInput){
                var theValue:Number=Number(compAtFocus["text"]);
                theValue += evt.delta;
                compAtFocus["text"]=""+theValue;
            }  
       }         
        ]]>
    </mx:Script>
    
</mx:Application>

 Demo演示：【或者点击链接测试：http://www.myflex.org/codesamples/mousewheel/MouseWheel.html 】

例子中我们是检查了被focus的组件是否是TextInput,如果是执行递增或者递减的功能。如果不是比如TextArea类型的，就不具有这 个效果了。需要注意的，如果你的系统不支持滑轮滚动可能跟驱动有关，不是Flex的问题。如果你不喜欢例子中的增长或者递减数值，你可以替换掉delta 这个属性。

  本文主要介绍和实现怎么使用Flex-java来实现Email的发送。这尤其是在做用户回馈的时候需要用到。当然这实现的只要是一个简单的例子。正在执行发送Email功能还是使用java来实现的，Flex只不过提供了数据的输入和封装。使用的原理很简单：

Flex-Form <--接受用户输入

   ||

   ||使用RemoteObject方式就用户输入的数据封装成json格式传递到后台java bean

   ||

Java Bean()--->执行真正的Email发送----->回馈消息---->Flex-Form

使用的界面如下图：

简单实现了用户输入的验证以及Email验证(更详细的可以参考Adobe数据验证 )

以下是实现的代码：

1.后台java处理：【你需要两个jar: mail.jar and activation.jar 】

package mail;
import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import net.sf.json.JSONArray;
import net.sf.json.JSONObject;

public class SendFlexMail {
     private static final String SMTP_HOST_NAME = "smtp.163.com";
     private static final String SMTP_AUTH_USER = "feixianryexin";
     private static final String SMTP_AUTH_PWD = "yourpassword";

     // Add List of Email address to who email needs to be sent to

     private String[] emailList;
      public String sendFlexMail(String flexMail){
         String result="";
         JSONArray flexJavaMail = JSONArray.fromObject(flexMail);
         emailList = new String[2];
         JSONObject mailJsonObj = JSONObject.fromObject(flexJavaMail.getString(0));
         emailList[0] = mailJsonObj.getString("senderEmail");//send mail to yourself

         emailList[1] = mailJsonObj.getString("sendToEmail");
         String senderName = mailJsonObj.getString("senderName");
         String sendToName = mailJsonObj.getString("sendToName");
         String senderMail = mailJsonObj.getString("senderEmail");
         String emailMessage = mailJsonObj.getString("emailMessage");
         String emailTopic = sendToName+":A Letter From Your Friend "+senderName;
         try{
         postMail(emailList,emailTopic, emailMessage,senderMail);
         result="Congratulations!";
         }catch (MessagingException e){
             e.printStackTrace();
         }
         return result;
      }
     public void postMail( String recipients[ ], String subject,
     String message , String from) throws MessagingException
     {
     boolean debug = false;

     //Set the host smtp address

     Properties props = new Properties();
     props.put("mail.smtp.host", SMTP_HOST_NAME);
     props.put("mail.smtp.auth", "true");

     Authenticator auth = new SMTPAuthenticator();
     Session session = Session.getDefaultInstance(props, auth);

     session.setDebug(debug);

     // create a message

     Message msg = new MimeMessage(session);

     // set the from and to address

     InternetAddress addressFrom = new InternetAddress(from);
     msg.setFrom(addressFrom);

     InternetAddress[] addressTo = new InternetAddress[recipients.length];
     for (int i = 0; i < recipients.length; i++)
     {
     addressTo[i] = new InternetAddress(recipients[i]);
     }
     msg.setRecipients(Message.RecipientType.TO, addressTo);


     // Setting the Subject and Content Type

     msg.setSubject(subject);
     msg.setContent(message, "text/plain");
     Transport.send(msg);
     }


    /**
    * SimpleAuthenticator is used to do simple authentication
    * when the SMTP server requires it.
    */
    private class SMTPAuthenticator extends javax.mail.Authenticator
    {

     public PasswordAuthentication getPasswordAuthentication()
     {
     String username = SMTP_AUTH_USER;
     String password = SMTP_AUTH_PWD;
     return new PasswordAuthentication(username, password);
     }
    }

}

 2.前台的Flex-Form：

  

<?xml version="1.0" encoding="utf-8"?>
<mx:Application xmlns:mx="http://www.adobe.com/2006/mxml" viewSourceURL="srcview/index.html">

<mx:Script>
    <![CDATA[
        import mx.controls.Alert;
        import mx.controls.TextInput;
        import mx.rpc.events.ResultEvent 
        import mx.collections.ArrayCollection;
        import com.adobe.serialization.json.JSON;
        
        private var flexMail:ArrayCollection;
        public function sendMailAction( ):void
        {
         
            
           flexMail = new ArrayCollection();
           var mailObj:Object = new Object();
           mailObj.senderName = senderName.text;
           mailObj.senderEmail =senderEmail.text;
           mailObj.sendToName = sendToName.text;
           mailObj.sendToEmail = sendToEmail.text;
           mailObj.emailMessage =emailMessage.text;
           
           //check email valid

           if(senderName.text !="" && senderEmail.text!=""&&sendToName.text!=""&& sendToEmail.text!=""&& emailMessage.text!=""){
                 if(senderEmail.text.indexOf("@")==-1 || sendToEmail.text.indexOf("@")==-1){
                   labState.text="Email格式不正确哦！";
                 }else{
                     flexMail.addItem(mailObj); 
                     var emailString:String = JSON.encode(flexMail.toArray());
                     sendMail.sendFlexMail(emailString)
                     labState.text="正在发送请稍候...";
           }
           }else{
                labState.text="请输入所有的选项!";
           }

        } 
        
        public function sendFlexMailResult(event:ResultEvent):void
        {
            Alert.show(event.result as String);
            senderName.text="";
            senderEmail.text="";
            sendToName.text="";
            sendToEmail.text="";
            emailMessage.text="";
            labState.text="恭喜，成功发送邮件！";
        }
        
    ]]>
</mx:Script>

<mx:Style source="mailFormCSS.css" />

<mx:RemoteObject id="sendMail" destination="sendFlexMail" showBusyCursor="true" result="sendFlexMailResult(event)" />
    <mx:Panel width="448" height="474" >
        <mx:Text width="100%" height="29" text="Email Form" styleName="header"/>
        <mx:Text text="Flex3 / BlazeDS / Java" styleName="subHeader" />
        <mx:HRule width="100%"/>
        
         <mx:Form id="emailForm" width="100%" >
         
             <mx:FormItem label="Your Name:" horizontalAlign="left" width="100%">
                <mx:TextInput id="senderName" width="100%"/>
            </mx:FormItem>
            
            <mx:FormItem label="Your E-mail:" width="100%">
                <mx:TextInput id="senderEmail" width="100%"/>
            </mx:FormItem>
         
            <mx:FormItem label="Friends Name:" horizontalAlign="left" width="100%">
                <mx:TextInput id="sendToName" width="100%"/>
            </mx:FormItem>
    
            <mx:FormItem label="Friends E-mail:" width="100%">
                <mx:TextInput id="sendToEmail" width="100%"/>
            </mx:FormItem>
            
            <mx:FormItem label="Message" horizontalAlign="left" width="100%">
                <mx:TextArea id="emailMessage" width="100%" height="100"/>
            </mx:FormItem>
            
             <mx:FormItem width="100%" height="33">
                <mx:Spacer width="200" />
                <mx:Button id="submitBtn" label="Submit" click="sendMailAction()"/>
             </mx:FormItem>
        </mx:Form>
        
     <mx:HBox styleName="cbStyle" width="414">
      <mx:Label id="labState" width="393" fontSize="14" color="#FE0113"/>
           <!-- <mx:CheckBox label="Check to send a copy to yourself" id="cb"/>-->
        </mx:HBox>
        
        <mx:HRule width="100%" height="0"/>
        
        <mx:Label styleName="footer">
               <mx:htmlText><![CDATA[<a href="http://yexin218.cublog.cn" target="_blank" ><b>一路风尘制作</b></a>]]></mx:htmlText>
           </mx:Label>
    
    </mx:Panel>
    
</mx:Application>

 

数据传递使用的是BlazeDS.关于BlazeDS参考：使用BlazeDS实现Java和Flex通信

附件下载【包含Flex-plugin的eclipse工程文件以及源码】：DownLoad