Flex+seam 文件上传

最新推荐文章于 2016-07-14 16:22:02 发布

iteye_9333

最新推荐文章于 2016-07-14 16:22:02 发布

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分类专栏： Seam 文章标签： Seam Flex Java Servlet Apache

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本文介绍了一个使用Flex技术实现的文件上传组件的具体实现细节，包括MXML代码示例及Java Servlet端的处理逻辑。该组件支持文件选择、上传进度显示等功能。

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Flex：
FileUpload.mxml

<?xml version="1.0" encoding="utf-8"?>
<mx:Canvas xmlns:mx="http://www.adobe.com/2006/mxml">


	<mx:Script>
		<![CDATA[
			import com.gptri.core.GlobalParam;
			import flash.net.FileReference;
			import com.gptri.gpweb.component.StatusEnum;
			import org.granite.tide.events.TideUIEvent;
			private var fileRef:FileReference =new FileReference();;

			private var gp:GlobalParam=GlobalParam.getInstance();

			public function get fileName():String
			{
				return fileRef.name;
			}

			private function fileBrowse():void
			{
				fileRef.addEventListener(Event.SELECT, selectHandler);
				fileRef.addEventListener(ProgressEvent.PROGRESS, onProgress);
				fileRef.addEventListener(Event.COMPLETE, completeHandler);	
				var gifFilter:FileFilter=new FileFilter("PowerPoint", "*.ppt", "PPT");
				fileRef.browse([gifFilter]);
			}
			private function onProgress(e:ProgressEvent):void
			{
				var proc:uint=e.bytesLoaded / e.bytesTotal * 100;
				dispatchEvent(new TideUIEvent("statusChange", "当前进度: " + " " + proc + "%", StatusEnum.WORKING));
			}
			private function selectHandler(event:Event):void
			{
				var request:URLRequest=new URLRequest(gp.sysHost + "FileUploadServlet");
				fileRef=FileReference(event.target);

				fileRef.upload(request);

			}

			private function completeHandler(event:Event):void
			{
				dispatchEvent(new Event("uploadComplete"));
			}
		]]>
	</mx:Script>

	<mx:Button click="fileBrowse()" label="上传文件" fontSize="12"/>
</mx:Canvas>

Application


			public function init():void
			{
				fileUpload.addEventListener("uploadComplete", uploadComplete);
			}
		[Observer("uploadComplete")]
			public function uploadComplete(e:Event):void
			{

				weekReportSearch.uploadPPT(uploadPPTResult);
			}
			private function uploadPPTResult(e:TideResultEvent):void
			{
				dispatchEvent(new TideUIEvent("statusChange", e.result as String, StatusEnum.WORKING));
				CursorManager.removeBusyCursor();
			}
			<cs:FileUpload id="fileUpload"/>

java Servelet ：需要common-io,commons-fileupload包



import java.io.File;
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.FileUploadException;
import org.apache.commons.fileupload.disk.DiskFileItemFactory;
import org.apache.commons.fileupload.servlet.ServletFileUpload;

public class FileUploadServlet extends HttpServlet {
	// 定义文件的上传路径
	private String uploadPath = "D:\\upload\\";
	// 限制文件的上传大小
	private int maxPostSize = 100 * 1024 * 1024;

	public FileUploadServlet() {

		super();
	}

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

	public void doGet(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		// 保存文件到服务器中
		response.setContentType("text/html; charset=UTF-8");
		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();
					request.getSession().setAttribute("uploadFile",
							uploadPath + name);
					System.out.println(name);
					try {
						item.write(new File(uploadPath + name));
					} catch (Exception e) {
						e.printStackTrace();
					}
				}
			}
		} catch (FileUploadException e) {
			e.printStackTrace();
		}
	}

	public void doPost(HttpServletRequest request, HttpServletResponse response)
			throws ServletException, IOException {
		doGet(request, response);
	}

	public void init() throws ServletException {
		// Put your code here
	}
}

seam 组件


@Name("weekReportSearch")
@Scope(EVENT)
@TideEnabled
public class WeekReportSearchingAction {
	@In
	private EntityManager entityManager;

	@In(required = false)
	private String uploadFile;
	public String uploadPPT() {
        //SlideShow ppt = new SlideShow(new HSLFSlideShow(uploadFile));
          // Put your code here
	}

配置文件:
web.xml中添加

	<servlet>

	        <servlet-name>FileUploadServlet</servlet-name>
	       <servlet-class>com.gptri.gpweb.service.util.FileUploadServlet</servlet-class>
	</servlet>
	<servlet-mapping>
	        <servlet-name>FileUploadServlet</servlet-name>
	        <url-pattern>/FileUploadServlet</url-pattern>
	</servlet-mapping>
	<filter>
		<filter-name>Seam Multipart Filter</filter-name>
	        <filter-class>org.jboss.seam.web.MultipartFilter</filter-class>
	</filter>

	<filter-mapping>
		<filter-name>Seam Multipart Filter</filter-name>
		<url-pattern>*.seam</url-pattern>
	</filter-mapping>

components.xml 添加

  <web:multipart-filter create-temp-files="true"
	max-request-size="104857600"
        url-pattern="*.seam"/>