VIM Editor: How to do auto formatting in VIM?

Question

I am new to VIM, so still learning. The thing I wanna do is instead of using tabs, I wanna to use 2 spaces to replace A tab. I wanna apply this format to my entire java code. How would I do it? Thanks!

Updated I used this following and it worked

:%s/\t/  /

Answer 1

There is a builtin :retab

You can also use gg=G to reindent the entire source file.

Answer 2

There are many ways of replace tabs with spaces. If you want to use search-and-replace, you need the :s command. Try typing ":help :s" for help. You'll find that the following works:

:%s/<ctrl-v><tab>/  /g

Answer 3

您可以使用=命令来设置代码格式，如果您将一行缩进两个空格，则对它们以下行可以缩进2个空格（如果您对它们使用=<movement>命令）。