问题:

Is there any way to find and replace text string automatically in all folder's files?

回答1:

Yes, there is Multiple Files search and replace.

Press ctrlshiftF (cmdshiftF on MacOS):

In the Where field you can also add filters to search only folders and files that you need. If nothing is set, the search is made on all files listed in the sidebar.

If you double click on a line of the search result, Sublime will jump to that line.

Notice these icons in the search bar:

The first (show context) toggles context in result format (if enabled, some lines of text are shown before and after the matching line). The second allows to show the result in a new buffer, or in a console.

回答2:

Press ctrlshiftF (cmdshiftF on  Mac OS X :) and then put *.* in the where: field

This will open the search up to all files in the project as opposed to only open files or folders.

You can also use this to search only files of a certain type, or with a certain name regardless of type. It's just wildcards for the filename and extension.