资源都是来自网上。本实例将展示使用Flex和java servlet上传文件。
事前准备就是到下载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="" 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(""); 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>
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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 GET and POST 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"); } }
//
/** * Handles the HTTP GET 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 POST 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"; } //
}
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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>
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效果图:
参考:
http://blog.csdn.net/meteorlWJ/archive/2008/06/01/2450234.aspx
http://www.cnblogs.com/dannyr/archive/2006/11/13/559006.html
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