Implementation method of Java upload file progress bar (with demo source code download)

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

Things are very simple. Common fileUpload is mainly used. There is an interface of progresslistener, which can update the size of uploaded files in real time. What else to say with this?

Here is the code:

Then add such a piece of code to the uploaded servlet or action to add the custom progresslistener

Finally, it is OK to continuously access another servlet through JS to return the upload status in real time. I won't post the code due to space limitation. Interested readers can download it by themselves.

Click here to download the complete example code.