一段来自ews.eclipse.technology.rap的关于Upload a file的代码

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Eclipse Servlet JSP CVS HTML

I impleted my File upload/download system with rap internal Browser + servlet. upload dialog：

public class FileUploadDialog extends TitleAreaDialog {
	private Browser browser;

	public FileUploadDialog(Shell parentShell) {
		super(parentShell);
	}

	/**
	 * Create contents of the dialog
	 * @param parent
	 */
	@Override
	protected Control createDialogArea(Composite parent) {
		Composite area = (Composite) super.createDialogArea(parent);
		Composite container = new Composite(area, SWT.NONE);
		container.setLayout(new FillLayout());
		container.setLayoutData(new GridData(GridData.FILL_BOTH));

browser = new Browser(container, SWT.NONE); String url = "http://"+RWT.getRequest().getServerName()+":"+RWT.getRequest().getServerPort()+"/web/fileupload.jsp"; String html = "<?xml version=\"1.0\" encoding=\"utf-8\" ?><html><head><title>upload file</title></head><body>"+ "<form action=\""+url+"\" enctype=\"MULTIPART/FORM-DATA\" method=\"post\"><br />File Name:</br><input type=\"file\""+ " name=\"filename\"/><br><input type=\"submit\" value=\"upload\"/></form></body></html> "; browser.setText(html); setMessage("select a local file"); return area; }

	/**
	 * Return the initial size of the dialog
	 */
	@Override
	protected Point getInitialSize() {
		return new Point(382, 280);
	}

	protected void configureShell(Shell newShell) {
		super.configureShell(newShell);
		newShell.setText("upload file");
	}


file upload sevlet:

public class FileUploadServlet extends HttpServlet {
	private static final long serialVersionUID = -7245361228773015964L;
	private String uploadPath = "/upload/"; // server file repository
	private String tempPath = "/upload/tmp/"; //temp file folder

public void doPost(HttpServletRequest request, HttpServletResponse response) throws IOException, ServletException { try { DiskFileUpload fu = new DiskFileUpload(); // max file size fu.setSizeMax(-1); // buffer size fu.setSizeThreshold(4096); // temp path fu.setRepositoryPath(tempPath);

			// get all uploa file
			List fileItems = fu.parseRequest(request);
			Iterator i = fileItems.iterator();
			while (i.hasNext()) {
				FileItem fi = (FileItem) i.next();
				// get the upload file name
				String fileName = fi.getName();
				String sep = System.getProperty("file.separator");
				int index = fileName.lastIndexOf(sep);
				if(index >-1){
					fileName = fileName.substring(fileName.lastIndexOf(sep));
				}
				fi.write(new File(uploadPath + fileName));
				response.getWriter().println(fileName+"upload success");
			}
		} catch (Exception e) {
		 //do something?
			e.printStackTrace();
		}
	}
	public void init() throws ServletException {
		if (!new File(uploadPath).isDirectory())
			new File(uploadPath).mkdirs();
		if (!new File(tempPath).isDirectory())
			new File(tempPath).mkdirs();
	}
}

registe servlet:


   public class HttpServiceTracker extends ServiceTracker {

       public HttpServiceTracker(BundleContext context) {
           super(context, HttpService.class.getName(), null);
       }

public Object addingService(ServiceReference reference) { final HttpService httpService = (HttpService) context .getService(reference); try { //regist file upload servlet HttpContext commonContext = new BundleEntryHttpContext(context .getBundle(), fileFolder); httpService.registerResources(fileContext, "/", commonContext);
Servlet adaptedJspServlet = new ContextPathServletAdaptor( new FileUploadServlet(), fileContext); httpService.registerServlet(fileContext + "/fileupload.file", adaptedJspServlet, null, commonContext);

           } catch (Exception e) {
               e.printStackTrace();
           }
           return httpService;
       }

public void removedService(ServiceReference reference, Object service) { final HttpService httpService = (HttpService) service; httpService.unregister(fileContext); httpService.unregister(fileContext + "/fileupload.jsp"); super.removedService(reference, service); } }

start servlet:

  add these code to the bundle start up method.
 	public void start(BundleContext context) throws Exception {
		super.start(context);
		plugin = this;
       httpServiceTracker = new HttpServiceTracker(context);
       httpServiceTracker.open();
       System.out.println("IM resource servlet started...");
	}

这个实现是在RAP中使用Browser+servlet实现的文件上传功能；

其实在RAP的cvs上已经放出了org.eclipse.rwt.widgets.upload，专用于上传的组件，测试了一下，效果还不错，有进度条提示；不过在IE6下，有点难看了，在FF3下不能使用；

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RAP官方老窝 | Eclipse-RCP开发者的福音

2008-01-11 13:17
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