Java upload file progress bar method of of with demo source download

This article illustrates the implementation of the Java upload file progress bar. Share with you for your reference, as follows:

It's simple, mostly using commons-fileupload, and it has a progressListener interface that updates the size of uploaded files in real time.

Here is the code:

package lc.progress;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import lc.progress.vo.fileUploadStatus;
import org.apache.commons.fileupload.ProgressListener;
public class myProgressListener implements ProgressListener {
  private HttpSession session;
  public myProgressListener(HttpServletRequest req) {
    session=req.getSession();
    fileUploadStatus status = new fileUploadStatus();
    session.setAttribute("status", status);
  }
  
  public void update(long pBytesRead, long pContentLength, int pItems) {
    // TODO Auto-generated method stub
    fileUploadStatus status = (fileUploadStatus) session.getAttribute("status");
    status.setPBytesRead(pBytesRead);
    status.setPContentLength(pContentLength);
    status.setPItems(pItems);
  }
}

You can then add such a snippet to the uploaded servlet or action to add a custom progressListener

myProgressListener getBarListener = new myProgressListener(req);
ServletFileUpload upload = new ServletFileUpload(factory);
upload.setProgressListener(getBarListener);

Finally, js is used to continuously access another servlet to return the upload status in real time. I will not post the code due to the limitation of space. Interested readers can download it by themselves.

Complete sample code click here (link: http://xiazai.jb51.net/201512/yuanma/java-upload-Progress-style-codes (jb51.net). Rar).

I hope this article has been helpful to you in Java programming.