flex文件上传1

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Flex+Java文件上传 2009-12-16 09:17:07| 分类：项目工具的使用 | 标签： |字号大中小订阅 .

在研究Flex DataGrid导入excel时，用到了Flex的文件上传功能。（参见我的Blog：http://cwfmaker.javaeye.com/blog/539449）在Adobe的Flex RIA编程环境下，是无法读取本地文件的（据我所知），但是我们可以依赖于Flex调用后台的代码实现文件上传功能，我这里是利用Flex的URLRequest来向java的Servlet传送一个Http请求（Servlet集成自HttpServlet ，已实现文件上传功能），而Servlet响应请求之后会利用Apcahe的开源Jar包(org.apache.commons.fileupload.servlet.ServletFileUpload类)完成文件的生成。通过以上原理就可以利用Flex+java实现文件上传。（这里也是参考了网上的一些文章）

java Servlet 代码

Java代码
1.package com.yyhy.java.util;
2.
3.//多文件上传的Java端的类   4.import javax.servlet.http.HttpServlet;   5.import javax.servlet.http.HttpServletRequest;   6.import javax.servlet.http.HttpServletResponse;   7.import javax.servlet.ServletException;   8.import java.util.List;   9.import java.util.Iterator;   10.import java.io.File;   11.import java.io.IOException;   12.import java.io.UnsupportedEncodingException;   13.import java.net.URLDecoder;   14.import org.apache.commons.fileupload.FileUploadException;   15.import org.apache.commons.fileupload.disk.DiskFileItemFactory;   16.import org.apache.commons.fileupload.servlet.ServletFileUpload;   17.import org.apache.commons.fileupload.FileItem;   18.import org.apache.log4j.Logger;   19.import org.apache.commons.lang.ObjectUtils;   20.import org.springframework.context.ApplicationContext;   21.import org.springframework.context.support.ClassPathXmlApplicationContext;   22.
23.
24.public class FileUploadAction extends HttpServlet {   25.
26.    // 限制文件的上传大小   27.    private int maxPostSize = 100 * 1024 * 1024;   28.    //文件上传地址   29.    private String uploadPath;   30.
31.    public FileUploadAction() {   32.        //从配置文件中取得文件上传地址   33.        setUploadPath();
34.    }
35.    public String getUploadPath() {   36.        return uploadPath;   37.    }
38.    public void setUploadPath() {   39.        //从配置文件中取得文件上传地址   40.        ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");   41.        ServerAddress serverAddressBean=(ServerAddress)context.getBean("ServerAddressBean");   42.        this.uploadPath = serverAddressBean.getUploadPath().trim();   43.    }
44.    // 文件上传   45.    public void service(HttpServletRequest request, HttpServletResponse response)   46.            throws ServletException   47.            {
48.            this.doUploadAdd(request, response);   49.    }
50.
51.    private void logger(String info) {   52.        System.out.println(info);
53.    }
54.
55.    protected void doGet(HttpServletRequest request, HttpServletResponse response)      56.    throws ServletException, IOException {      57.        doUploadAdd(request, response);
58.     }
59.
60.    protected void doPost(HttpServletRequest request, HttpServletResponse response)      61.    throws ServletException, IOException {      62.        doUploadAdd(request, response);
63.     }
64.
65.    private void doUploadAdd(HttpServletRequest request,   66.            HttpServletResponse response) throws ServletException {   67.        logger("begin to upload");   68.        try {   69.            request.setCharacterEncoding("UTF-8");// 防止文件名称带有汉字后传到服务器乱码        70.            //建立文件夹   71.            this.makeDir(uploadPath);   72.        } catch (UnsupportedEncodingException e) {   73.            // TODO Auto-generated catch block   74.            e.printStackTrace();
75.        }
76.        saveFiletoServer(request,response,uploadPath);
77.    }
78.
79.    private void doUploadDelete(HttpServletRequest request,HttpServletResponse response) throws ServletException    80.    {
81.        String dirtyStr = "";//需要删除的文件名（单个文件）或文件夹名列表   82.        try    83.        {
84.            if (request.getParameter("dirtyStr") != null) {   85.                dirtyStr=URLDecoder.decode(request.getParameter("dirtyStr"),"utf-8");//前台ENCODE,后台DECODE   86.                logger("删除的文件（夹）为:" + dirtyStr);   87.            }
88.        }
89.        catch (Exception e) {   90.            // TODO Auto-generated catch block   91.            logger(e.getMessage());
92.        }
93.
94.        try {   95.            new DeleteFiles().DeleteModifyFiles(dirtyStr, uploadPath);   96.        } catch (Exception e) {   97.            logger(e.getMessage());
98.        }
99.    }
100.    //保存文件到服务器中   101.    private void saveFiletoServer(HttpServletRequest request,HttpServletResponse response,String uploadPath)   102.    {
103.        // 操作文件   104.        response.setContentType("text/html; charset=UTF-8");   105.        DiskFileItemFactory factory = new DiskFileItemFactory();   106.        factory.setSizeThreshold(1024 * 4);   107.        ServletFileUpload upload = new ServletFileUpload(factory);   108.        upload.setFileSizeMax(maxPostSize);
109.        logger("request========" + ObjectUtils.toString(request));   110.        List fileItems = null;   111.        try {   112.            fileItems = upload.parseRequest(request);
113.            logger("============" + ObjectUtils.toString(fileItems));   114.            Iterator iter = fileItems.iterator();
115.            while (iter.hasNext()) {   116.                FileItem item = (FileItem) iter.next();
117.                log(item.toString());
118.                if (!item.isFormField()) {   119.                    String name = item.getName();
120.                    logger("上传的文件名 = " + name);   121.                    try {   122.                        item.write(new File(uploadPath + name));   123.                    } catch (Exception ex) {   124.                        logger(ex.getMessage());
125.                    }
126.                }
127.            }
128.        } catch (FileUploadException ex1) {   129.            logger("FileUploadException->" + ex1.getMessage());   130.        }
131.    }
132.    // 建立文件夹路径   133.    private boolean makeDir(String uploadPath) {   134.        boolean isOK = false;   135.        try {   136.            File file = new File(uploadPath);   137.            file.mkdirs();
138.            isOK = true;   139.        } catch (Exception e) {   140.            isOK = false;   141.        } finally {   142.            return isOK;   143.        }
144.    }
145.    // 建立文件夹路径   146.    private boolean makeDirs(String uploadPath, String newDocStr) {   147.        boolean isOK = false;   148.        File file;
149.        String[] temp;
150.        try {   151.            temp = newDocStr.split(",");   152.            for (int i = 0; i < temp.length; i++) {   153.                file = new File(uploadPath + temp[i] + "\\");   154.                file.mkdirs();
155.            }
156.            isOK = true;   157.        } catch (Exception e) {   158.            isOK = false;   159.        } finally {   160.            return isOK;   161.        }
162.    }
163.}
package com.yyhy.java.util;

//多文件上传的Java端的类
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.ServletException;
import java.util.List;
import java.util.Iterator;
import java.io.File;
import java.io.IOException;
import java.io.UnsupportedEncodingException;
import java.net.URLDecoder;
import org.apache.commons.fileupload.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;
import org.apache.commons.fileupload.FileItem;
import org.apache.log4j.Logger;
import org.apache.commons.lang.ObjectUtils;
import org.springframework.context.ApplicationContext;
import org.springframework.context.support.ClassPathXmlApplicationContext;

public class FileUploadAction extends HttpServlet {

// 限制文件的上传大小
private int maxPostSize = 100 * 1024 * 1024;
//文件上传地址
private String uploadPath;

public FileUploadAction() {
//从配置文件中取得文件上传地址
setUploadPath();
}
public String getUploadPath() {
return uploadPath;
}
public void setUploadPath() {
//从配置文件中取得文件上传地址
ApplicationContext context = new ClassPathXmlApplicationContext("applicationContext.xml");
ServerAddress serverAddressBean=(ServerAddress)context.getBean("ServerAddressBean");
this.uploadPath = serverAddressBean.getUploadPath().trim();
}
// 文件上传
public void service(HttpServletRequest request, HttpServletResponse response)
   throws ServletException
   {
   this.doUploadAdd(request, response);
}

private void logger(String info) {
System.out.println(info);
}

protected void doGet(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
doUploadAdd(request, response);
     }

protected void doPost(HttpServletRequest request, HttpServletResponse response)
    throws ServletException, IOException {
doUploadAdd(request, response);
     }

private void doUploadAdd(HttpServletRequest request,
   HttpServletResponse response) throws ServletException {
logger("begin to upload");
try {
   request.setCharacterEncoding("UTF-8");// 防止文件名称带有汉字后传到服务器乱码
   //建立文件夹
   this.makeDir(uploadPath);
} catch (UnsupportedEncodingException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
}
saveFiletoServer(request,response,uploadPath);
}

private void doUploadDelete(HttpServletRequest request,HttpServletResponse response) throws ServletException
{
String dirtyStr = "";//需要删除的文件名（单个文件）或文件夹名列表
try
{
   if (request.getParameter("dirtyStr") != null) {
    dirtyStr=URLDecoder.decode(request.getParameter("dirtyStr"),"utf-8");//前台ENCODE,后台DECODE
    logger("删除的文件（夹）为:" + dirtyStr);
   }
}
catch (Exception e) {
   // TODO Auto-generated catch block
   logger(e.getMessage());
}

try {
   new DeleteFiles().DeleteModifyFiles(dirtyStr, uploadPath);
} catch (Exception e) {
   logger(e.getMessage());
}
}
//保存文件到服务器中
private void saveFiletoServer(HttpServletRequest request,HttpServletResponse response,String uploadPath)
{
// 操作文件
response.setContentType("text/html; charset=UTF-8");
DiskFileItemFactory factory = new DiskFileItemFactory();
factory.setSizeThreshold(1024 * 4);
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setFileSizeMax(maxPostSize);
logger("request========" + ObjectUtils.toString(request));
List fileItems = null;
try {
   fileItems = upload.parseRequest(request);
   logger("============" + ObjectUtils.toString(fileItems));
   Iterator iter = fileItems.iterator();
   while (iter.hasNext()) {
    FileItem item = (FileItem) iter.next();
    log(item.toString());
    if (!item.isFormField()) {
     String name = item.getName();
     logger("上传的文件名 = " + name);
     try {
      item.write(new File(uploadPath + name));
     } catch (Exception ex) {
      logger(ex.getMessage());
     }
    }
   }
} catch (FileUploadException ex1) {
   logger("FileUploadException->" + ex1.getMessage());
}
}
// 建立文件夹路径
private boolean makeDir(String uploadPath) {
boolean isOK = false;
try {
   File file = new File(uploadPath);
   file.mkdirs();
   isOK = true;
} catch (Exception e) {
   isOK = false;
} finally {
   return isOK;
}
}
// 建立文件夹路径
private boolean makeDirs(String uploadPath, String newDocStr) {
boolean isOK = false;
File file;
String[] temp;
try {
   temp = newDocStr.split(",");
   for (int i = 0; i < temp.length; i++) {
    file = new File(uploadPath + temp[i] + "\\");
    file.mkdirs();
   }
   isOK = true;
} catch (Exception e) {
   isOK = false;
} finally {
   return isOK;
}
}
}

Flex前台代码：

Actionscript代码
1.<?xml version="1.0" encoding="utf-8"?>
2.<mx:TitleWindow xmlns:fx="http://ns.adobe.com/mxml/2009"    3.                xmlns:s="library://ns.adobe.com/flex/spark"    4.                xmlns:mx="library://ns.adobe.com/flex/halo" layout="absolute" width="400" height="300" 5.                creationComplete="CreationCompletedHandler()" 6.                showCloseButton="true">   7.    <fx:Script>
8.        <![CDATA[
9.            import mx.controls.Alert;
10.            import mx.events.CloseEvent;
11.            import mx.managers.PopUpManager;
12.            import mx.utils.StringUtil;
13.
14.            [Bindable]
15.            private var _filename:String;
16.
17.            public function get filename():String
18.            {
19.                return _filename;
20.            }
21.
22.            public function set filename(value:String):void
23.            {
24.                _filename = value;
25.            }
26.
27.
28.            [Bindable]
29.            private var _file:FileReference=new FileReference();
30.
31.            public function get file():FileReference
32.            {
33.                return _file;
34.            }
35.
36.            public function set file(value:FileReference):void
37.            {
38.                _file = value;
39.            }
40.
41.
42.            [Bindable]
43.            private var _serveraddress:String;
44.
45.            public function get serveraddress():String
46.            {
47.                return _serveraddress;
48.            }
49.
50.            public function set serveraddress(value:String):void
51.            {
52.                _serveraddress = value;
53.            }
54.
55.            /**creationComplete完成之后调用，获取服务器地址，建立事件监听
56.             * @param null
57.             * @author 陈文锋 54cwf@163.com   58.             * @return void
59.             * */
60.            public function CreationCompletedHandler():void
61.            {
62.                Security.allowDomain("*");   63.                var urlLoader:URLLoader=new URLLoader(new URLRequest("assets/conf/ServerAddressConfig.xml"));   64.                urlLoader.addEventListener(Event.COMPLETE,CompletedHandler);
65.                this.addEventListener(Event.CLOSE,TitleWindowClose);
66.                file.addEventListener(ProgressEvent.PROGRESS,progressHandler);
67.                file.addEventListener(Event.SELECT,selectedHandler);
68.                file.addEventListener(IOErrorEvent.IO_ERROR,ioErrorHandler);
69.            }
70.
71.            private function ioErrorHandler(e:IOErrorEvent):void
72.            {
73.                Alert.show(e.toString());
74.            }
75.
76.            private function progressHandler(e:ProgressEvent):void
77.            {
78.                lblProgress.text = " 已上传 " + e.bytesLoaded       79.                    + " 字节，共 " + e.bytesTotal + " 字节";      80.                var proc: uint = e.bytesLoaded / e.bytesTotal * 100;      81.                uploadbar.setProgress(proc, 100);      82.                uploadbar.label= "当前进度: " + " " + proc + "%";    83.            }
84.
85.            /**Event事件监听处理函数，弹出上传提示窗口
86.             * @param e，Event类型事件参数
87.             * @author 54cwf@163.com   88.             * @return void
89.             * */
90.            private function selectedHandler(e:Event):void
91.            {
92.                Alert.show("上传 " + file.name + " (共 "+Math.round(file.size/1024)+"KB)?",      93.                    "确认上传",      94.                    Alert.YES|Alert.NO,
95.                    null,
96.                    proceedWithUpload);
97.            }
98.
99.            /**CloseEvent事件监听处理函数，访问upload的servlet服务
100.             * @param e，Event类型事件参数
101.             * @author 54cwf@163.com   102.             * @return void
103.             * */
104.            private function proceedWithUpload(e:CloseEvent): void{
105.                if (e.detail == Alert.YES)
106.                {
107.                    filename=file.name;
108.                    var request:URLRequest = new URLRequest(StringUtil.trim(serveraddress));
109.                    try
110.                    {
111.                        file.upload(request);
112.                    }
113.                    catch (error:Error)
114.                    {
115.                        Alert.show("上传失败","错误");   116.                    }
117.
118.                }
119.            }
120.
121.            private function upload(): void{
122.                var typefiter:FileFilter=new FileFilter("Excel","*.xls");   123.                file.browse([typefiter]);
124.            }
125.
126.            /**CloseEvent事件监听处理函数，关闭TitleWindow弹出窗口
127.             * @param e，事件参数
128.             * @author 54cwf@163.com   129.             * @return void
130.             * */
131.            private function TitleWindowClose(e:CloseEvent):void
132.            {
133.                PopUpManager.removePopUp(this);
134.            }
135.
136.            /**Event事件监听处理函数，获取配置文件的文件上传路径
137.             * @param e，事件参数
138.             * @author 54cwf@163.com   139.             * @return void
140.             * */
141.            private function CompletedHandler(e:Event):void
142.            {
143.                var configurationxml:XML=XML((URLLoader(e.target).data));
144.                serveraddress=configurationxml.filesinservername;
145.            }
146.        ]]>
147.    </fx:Script>
148.    <mx:Canvas width="100%" height="100%">      149.        <mx:VBox width="100%" horizontalAlign="center">      150.            <mx:Label id="lblProgress" text="上传"/>      151.            <mx:ProgressBar id="uploadbar" labelPlacement="bottom" themeColor="#F20D7A"      152.                            minimum="0" visible="true" maximum="100" label="当前进度: 0%"         153.                            direction="right" mode="manual" width="200"/>      154.            <mx:Button label="上传文件" click="upload()"/>                   155.        </mx:VBox>
156.    </mx:Canvas>
157.</mx:TitleWindow>
<?xml version="1.0" encoding="utf-8"?>
<mx:TitleWindow xmlns:fx="http://ns.adobe.com/mxml/2009"
    xmlns:s="library://ns.adobe.com/flex/spark"
    xmlns:mx="library://ns.adobe.com/flex/halo" layout="absolute" width="400" height="300"
       creationComplete="CreationCompletedHandler()"
       showCloseButton="true">
<fx:Script>
<![CDATA[
   import mx.controls.Alert;
   import mx.events.CloseEvent;
   import mx.managers.PopUpManager;
   import mx.utils.StringUtil;

   [Bindable]
   private var _filename:String;

   public function get filename():String
   {
    return _filename;
   }

   public function set filename(value:String):void
   {
    _filename = value;
   }

   [Bindable]
   private var _file:FileReference=new FileReference();

   public function get file():FileReference
   {
    return _file;
   }

   public function set file(value:FileReference):void
   {
    _file = value;
   }

[Bindable]
private var _serveraddress:String;

   public function get serveraddress():String
   {
    return _serveraddress;
   }

   public function set serveraddress(value:String):void
   {
    _serveraddress = value;
   }

   /**creationComplete完成之后调用，获取服务器地址，建立事件监听
    * @param null
    * @author 陈文锋 54cwf@163.com
    * @return void
    * */
   public function CreationCompletedHandler():void
   {
    Security.allowDomain("*");
    var urlLoader:URLLoader=new URLLoader(new URLRequest("assets/conf/ServerAddressConfig.xml"));
    urlLoader.addEventListener(Event.COMPLETE,CompletedHandler);
    this.addEventListener(Event.CLOSE,TitleWindowClose);
    file.addEventListener(ProgressEvent.PROGRESS,progressHandler);
    file.addEventListener(Event.SELECT,selectedHandler);
    file.addEventListener(IOErrorEvent.IO_ERROR,ioErrorHandler);
   }

   private function ioErrorHandler(e:IOErrorEvent):void
   {
    Alert.show(e.toString());
   }

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

   /**Event事件监听处理函数，弹出上传提示窗口
    * @param e，Event类型事件参数
    * @author 54cwf@163.com
    * @return void
    * */
   private function selectedHandler(e:Event):void
   {
    Alert.show("上传 " + file.name + " (共 "+Math.round(file.size/1024)+"KB)?",
     "确认上传",
     Alert.YES|Alert.NO,
     null,
     proceedWithUpload);
   }

   /**CloseEvent事件监听处理函数，访问upload的servlet服务
    * @param e，Event类型事件参数
    * @author 54cwf@163.com
    * @return void
    * */
   private function proceedWithUpload(e:CloseEvent): void{
    if (e.detail == Alert.YES)
    {
     filename=file.name;
     var request:URLRequest = new URLRequest(StringUtil.trim(serveraddress));
     try
     {
      file.upload(request);
     }
     catch (error:Error)
     {
      Alert.show("上传失败","错误");
     }

    }
   }

   private function upload(): void{
    var typefiter:FileFilter=new FileFilter("Excel","*.xls");
    file.browse([typefiter]);
   }

   /**CloseEvent事件监听处理函数，关闭TitleWindow弹出窗口
    * @param e，事件参数
    * @author 54cwf@163.com
    * @return void
    * */
   private function TitleWindowClose(e:CloseEvent):void
   {
    PopUpManager.removePopUp(this);
   }

   /**Event事件监听处理函数，获取配置文件的文件上传路径
    * @param e，事件参数
    * @author 54cwf@163.com
    * @return void
    * */
   private function CompletedHandler(e:Event):void
   {
    var configurationxml:XML=XML((URLLoader(e.target).data));
    serveraddress=configurationxml.filesinservername;
   }
]]>
</fx:Script>
<mx:Canvas width="100%" height="100%">
<mx:VBox width="100%" horizontalAlign="center">
   <mx:Label id="lblProgress" text="上传"/>
   <mx:ProgressBar id="uploadbar" 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:TitleWindow>