vim

行末：$     

行首：^

空格：\s

行末空格：\s+$

行首空格：^\s+

删除行尾多个空格 : %s/\s+$//g

删除行首多个空格 : %s/^ +//g

删除空行：:g/^$/d

set fenc=utf-8

set fencs=utf-8,usc-bom,euc-jp,gb18030,gbk,gb2312,cp936

set nocompatible

set history=50

set tabstop=4

set number

syntax on

set showmatch

set matchtime=5

set expandtab