Flex和Servlet结合上传文件
1、准备工作
(1)下载文件上传的组件,commons-fileupload-1.3.1.jar
(2)下载文件输入输出jar,commons-io-2.4.jar
(3)有关servlet的jar包,servlet-api.jar
2、正式开发
(1)新建一个web项目工程,FlexFileUpload
(2)在src新建一个上传文件的servlet
FlexFileUploadServlet.java:
package com.you.upload.servlet; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; 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.FileItemFactory; import org.apache.commons.fileupload.FileUploadException; import org.apache.commons.fileupload.disk.DiskFileItemFactory; import org.apache.commons.fileupload.servlet.ServletFileUpload; public class FlexFileUploadServlet extends HttpServlet { /** * @Fields serialVersionUID:序列化 */ private static final long serialVersionUID = -6839362803884547766L; /** * Constructor of the object. */ public FlexFileUploadServlet() { super(); } /** * Destruction of the servlet. <br> */ public void destroy() { super.destroy(); // Just puts "destroy" string in log // Put your code here } /** * The doGet method of the servlet. <br> * * This method is called when a form has its tag value method equals to get. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { super.doGet(request, response); doPost(request, response); } /** * The doPost method of the servlet. <br> * * This method is called when a form has its tag value method equals to * post. * * @param request * the request send by the client to the server * @param response * the response send by the server to the client * @throws ServletException * if an error occurred * @throws IOException * if an error occurred */ @SuppressWarnings("rawtypes") public void doPost(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException { /** * 防止中文乱码 */ response.setContentType("text/html;charset=gb2312"); /** * 设置编码格式 */ response.setCharacterEncoding("utf-8"); /** * 创建一个工厂类 */ FileItemFactory factory = new DiskFileItemFactory(); /** * 上传对象 */ ServletFileUpload upload = new ServletFileUpload(factory); try { List items = upload.parseRequest(request); Iterator it = items.iterator(); while (it.hasNext()) { FileItem item = (FileItem) it.next(); /** * 判断是表单域 */ if (item.isFormField()) { System.out.println("一个表单域"); } else { /** * 处理文件上传 */ System.out.println("不是一个表单域"); String fileName = item.getName(); byte[] data = item.get(); /** * 获取文件上传路径 */ String file = getServletConfig().getInitParameter("file"); String fileFolderName = getServletContext().getRealPath(file + "\\" + fileName); try { FileOutputStream fileOutSt = new FileOutputStream(fileFolderName); try { fileOutSt.write(data); fileOutSt.close(); } catch (IOException exception) { exception.printStackTrace(); } } catch (FileNotFoundException exception) { exception.printStackTrace(); } } } } catch (FileUploadException exception) { exception.printStackTrace(); } } /** * Initialization of the servlet. <br> * * @throws ServletException * if an error occurs */ public void init() throws ServletException { // Put your code here } }(3)配置web.xml
<?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>FlexFileUploadServlet</servlet-name> <servlet-class>com.you.upload.servlet.FlexFileUploadServlet</servlet-class> <init-param> <description>上传文件临时路径</description> <param-name>file</param-name> <param-value>file</param-value> </init-param> </servlet> <servlet-mapping> <servlet-name>FlexFileUploadServlet</servlet-name> <url-pattern>/FlexFileUploadServlet</url-pattern> </servlet-mapping> <welcome-file-list> <welcome-file>index.jsp</welcome-file> </welcome-file-list> </web-app>
FileUpload.mxml:
<?xml version="1.0" encoding="utf-8"?> <s:Application xmlns:fx="http://ns.adobe.com/mxml/2009" xmlns:s="library://ns.adobe.com/flex/spark" xmlns:mx="library://ns.adobe.com/flex/mx" width="100%" height="100%" creationComplete="initHandler()" fontSize="12" fontWeight="bold" accentColor="#94E1ED"> <fx:Style> @namespace s "library://ns.adobe.com/flex/spark"; @namespace mx "library://ns.adobe.com/flex/mx"; Panel { borderStyle: solid; borderColor: #ff0000; borderAlpha: 0.5; borderThickness: 2; roundedBottomCorners: true; cornerRadius: 10; headerHeight: 50; backgroundAlpha: 0.5; highlightAlphas: 0.4, 0.24; headerColors: #cccc00, #cccc00; footerColors: #660033, #4217c2; backgroundColor: #00ffff; dropShadowEnabled: true; shadowDistance: 1; titleStyleName: "mypanelTitle"; } .mypanelTitle { letterSpacing: 1; color: #6600cc; textAlign: left; fontFamily: Trebuchet MS; fontSize: 16; fontWeight: bold; fontStyle: italic; textDecoration: underline; } </fx:Style> <fx:Script> <![CDATA[ import mx.collections.ArrayCollection; import mx.controls.Alert; import mx.events.FlexEvent; [Bindable] //提示用户选择要上载的文件或用于下载的位置 private var fileRefer:FileReference; [Bindable] //判断文件是否选中 private var fileSelected:Boolean; [Bindable] //上传文件临时路径 private var serverURL:String = "http://localhost:8686/FlexFileUpload/FlexFileUploadServlet"; private var stat:Array = new Array(); [Bindable] private var statusArray:ArrayCollection = new ArrayCollection(); /** * 初始化函数 */ protected function initHandler():void { fileRefer = new FileReference(); fileRefer.addEventListener(Event.SELECT, onFileSelect); fileRefer.addEventListener(ProgressEvent.PROGRESS,onUploadProgress); fileRefer.addEventListener(Event.COMPLETE, onUploadComplete); fileRefer.addEventListener(IOErrorEvent.IO_ERROR, onUploadError); fileRefer.addEventListener(SecurityErrorEvent.SECURITY_ERROR, onUploadError); } /** * 选择文件事件函数 */ private function onFileSelect(event:Event):void { fileSelected = true; fileTxt.text = fileRefer.name; stat.push({status:"准备上传 "+fileTxt.text}); statusArray = new ArrayCollection(stat); } /** * 正在上传事件函数 */ private function onUploadProgress(event:ProgressEvent):void { stat.push({status:"进度.."+((event.bytesLoaded * 100) / event.bytesTotal).toString()+"%"}); statusArray = new ArrayCollection(stat); } /** * 上传完全事件函数 */ private function onUploadComplete(event:Event):void { stat.push({status:"上传成功!"}); statusArray = new ArrayCollection(stat); } /** * 上传出现错误事件函数 */ private function onUploadError(event:Event):void { if (event is IOErrorEvent) { stat.push({status:"输入输出错误: "+(event as IOErrorEvent).text.toString()}); statusArray = new ArrayCollection(stat); } else if (event is SecurityErrorEvent) { stat.push({status:"安全错误: "+(event as IOErrorEvent).text.toString()}); statusArray = new ArrayCollection(stat); } } /** * 浏览按钮事件函数 */ protected function uploadBtn_clickHandler(event:MouseEvent):void { fileRefer.browse(); } /** * 上传文件事件函数 */ protected function uploadClickHandler(event:MouseEvent):void { if (!fileSelected || (urlTxt.text.length == 0)) { Alert.show("请选择一个文件并选择路径"); return; } var urlRequest:URLRequest = new URLRequest(urlTxt.text); fileRefer.upload(urlRequest); } ]]> </fx:Script> <fx:Declarations> <!-- 将非可视元素(例如服务、值对象)放在此处 --> </fx:Declarations> <s:Panel title="上传文件" horizontalCenter="0" verticalCenter="0" width="400" height="400" borderColor="#FFFFFF" backgroundColor="#D1EEEE"> <mx:VBox width="30%" height="40%" horizontalAlign="left" horizontalGap="0" paddingTop="5" paddingLeft="12"> <mx:HBox width="100%" height="10%" horizontalAlign="left"> <mx:VBox width="30%" height="100%" horizontalAlign="right" verticalAlign="middle"> <s:Label text="文件名:" width="80" fontWeight="bold"></s:Label> </mx:VBox> <mx:VBox width="40%" height="100%" horizontalAlign="left"> <s:TextInput id="fileTxt" width="200" editable="false" toolTip="选择上传文件"/> </mx:VBox> <mx:VBox width="30%" height="100%" horizontalAlign="left" verticalAlign="middle"> <s:Button id="uploadBtn" label="浏览..." click="uploadBtn_clickHandler(event)" width="80"/> </mx:VBox> </mx:HBox> <mx:HBox width="100%" height="10%" horizontalAlign="left"> <mx:VBox height="100%" width="30%" horizontalAlign="left" verticalAlign="middle"> <s:Label text="服务器路径:" width="80" fontWeight="bold"></s:Label> </mx:VBox> <mx:VBox height="100%" width="70%" horizontalAlign="left"> <s:TextInput id="urlTxt" width="290" text="{serverURL}"/> </mx:VBox> </mx:HBox> <mx:HBox height="10%" width="100%" horizontalAlign="center"> <s:Button id="uploadBut" label="上传文件" click="uploadClickHandler(event)" enabled="{fileSelected}" /> </mx:HBox> <mx:HBox height="70%" width="100%" horizontalAlign="center"> <mx:DataGrid id="statusDG" width="100%" height="250" dataProvider="{statusArray}" variableRowHeight="true" wordWrap="true"> <mx:columns> <mx:DataGridColumn dataField="status" headerText="上传文件状态" paddingLeft="0" paddingRight="0"> </mx:DataGridColumn> </mx:columns> </mx:DataGrid> </mx:HBox> </mx:VBox> </s:Panel> </s:Application>
(1)初始化时
(2)上传文件
原文地址:http://blog.csdn.net/you23hai45/article/details/24601021