Get the URL of the previous request from request

In the HTTP request object, you can take the HTTP header header, one of which is "Referer", through which we can know the URL of the last request, which is quite useful in some situations.

As in a list page, there is usually a delete link, delete a data in the list, if you want to delete the success and then return to the list page, you can do the following: Java code String Returl = Request.getheader ("Referer"); if (Returl!= null)    {Response.sendredirect (Returl); }

It's just so simple, it's OK.

For add and edit operations, you can do the same, just a little workaround, to pass a referer from the previous page.