set testStr=abcdefghijklmnopqrstuvwxyz0123456789
echo 原始字符串 %testStr%
echo 提取前五個(gè)字符串：%testStr:~0,5%
echo 提取最后五個(gè)字符串：%testStr:~-5%
echo 提取第一個(gè)到倒數(shù)第六個(gè)字符串：%testStr:~0,-5%
echo 提取五個(gè)字符串，從第四個(gè)字符開始:%testStr:~3,5%

echo 替換之前:%repStr%
echo 替換后：%repStr:aa=zz%
echo repStr=%repStr%
set "repStr=%aa:aa=zz%"
echo repStr=%repStr%

set aa=aabbcc
set bb=ddeeff
echo %aa%%bb%
echo aa=%aa%
echo bb=%bb%
set "aa=%aa%%bb%"
echo aa=%aa%

Setlocal ENABLEDELAYEDEXPANSION
::啟用命令擴(kuò)展，參加setlocal /?命令
set str1=This is a test string
set ch1=t
::注意，這里是區(qū)分大小寫的！
set str=%str1%
::復(fù)制字符串，用來(lái)截短，而不影響源字符串
:next
if not "%str%"=="" (
set /a num+=1
if "!str:~0,1!"=="%ch1%" goto last
::比較首字符是否為要求的字符，如果是則跳出循環(huán)
set "str=%str:~1%"
goto next
)
set /a num=0
::沒(méi)有找到字符時(shí)，將num置零
:last
echo 字符'%ch1%'在字符串"%str1%"中的首次出現(xiàn)位置為%num%
echo 輸出完畢，按任意鍵退出&&pause>nul&&exit

echo off
echo 完全路徑：%0
echo 去掉引號(hào)：%~0
echo 所在分區(qū)：%~d0
echo 所在路徑：%~p0
echo 文件名：%~n0
echo 拓展名:%~x0
echo 文件屬性：%~a0
echo 修改時(shí)間:%~t0
echo 文件大小:%~z0
echo %d0%
echo dp0 : %~dp0
echo sdp0:%~dp0
echo fo:%~f0
echo cd %cd%
rem set 目標(biāo)字符串=%源字符串:~起始值,截取長(zhǎng)度%
set testStr=abcdefghijklmnopqrstuvwxyz0123456789
echo 原始字符串 %testStr%
echo 提取前五個(gè)字符串：%testStr:~0,5%
echo 提取最后五個(gè)字符串：%testStr:~-5%
echo 提取第一個(gè)到倒數(shù)第六個(gè)字符串：%testStr:~0,-5%
echo 提取五個(gè)字符串，從第四個(gè)字符開始:%testStr:~3,5%
echo ================================================
echo ================ ? ?字符串替換 ? ? ? ===========
echo ================================================
set repStr=aaabbbcccdddeeefff
echo 替換之前:%repStr%
echo 替換后：%repStr:aa=zz%
echo repStr=%repStr%
set "repStr=%aa:aa=zz%"
echo repStr=%repStr%
echo ================================================
echo ================ ? ?字符串合并 ? ? ? ===========
echo ================================================
set aa=aabbcc
set bb=ddeeff
echo %aa%%bb%
echo aa=%aa%
echo bb=%bb%
set "aa=%aa%%bb%"
echo aa=%aa%

Setlocal ENABLEDELAYEDEXPANSION
::啟用命令擴(kuò)展，參加setlocal /?命令
set str1=This is a test string
set ch1=t
::注意，這里是區(qū)分大小寫的！
set str=%str1%
::復(fù)制字符串，用來(lái)截短，而不影響源字符串
:next
if not "%str%"=="" (
set /a num+=1
if "!str:~0,1!"=="%ch1%" goto last
::比較首字符是否為要求的字符，如果是則跳出循環(huán)
set "str=%str:~1%"
goto next
)
set /a num=0
::沒(méi)有找到字符時(shí)，將num置零
:last
echo 字符'%ch1%'在字符串"%str1%"中的首次出現(xiàn)位置為%num%
echo 輸出完畢，按任意鍵退出&&pause>nul&&exit