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