java（jdbc，ms sql服务器）如​​何获取指示我的查询已执行？

Question

My application does queries to database (non-queries too).

I show to the user indeterminate progressbar while transaction.

The problem is that I don't know when to close the progressbar, because I have no indication or signal object of query completion.

Answer 1

If your queries are taking so long that you need a progress bar, I'd recommend taking a hard look at your database to see how you can speed them up.

Since a database operation blocks, you know it's done when you return.

The progress bar suggests that you need some kind of polling mechanism to check a metric that indicates how much you have to do and how many have been done. Since you don't give any details, I can only guess what those might be.

But an AJAX call in your JSP to poll and update the progress bar is most likely what you need.