教你编写bat脚本Windows批处理

@echo off

Rem Remarks

:: Remarks

@echo off 
Rem This is for listing down all the files in the directory Program files 
dir "C:\Program Files" > C:\lists.txt 
echo "The program has completed"

rem Test.bat
@echo off 
echo %1 
echo %2 
echo %3

Test.bat 1 2 3

@echo off 
set message=Hello World 
echo %message%
rem 变量需要包含在％符号中显示

@echo off 
SET /A a=5 
SET /A b=10 
SET /A c=%a% + %b% 
echo %c%

@echo off 
set globalvar=5
SETLOCAL
set var=13145
set /A var=%var% + 5
echo %var%
echo %globalvar%
ENDLOCAL

@echo off 
echo %JAVA_HOME%

set message=Hello World

SET a= 
if [%a%]==[] echo "String A is empty" 

@echo off 
SET a=Hello 
SET b=World 
SET /A d=50 
SET c=%a% and %b% %d%
echo %c%
:: Hello and World 50

@echo off
set str=Hello World
call :strLen str strlen
echo String is %strlen% characters long
exit /b
:strLen
setlocal enabledelayedexpansion
:strLen_Loop
   if not "!%1:~%len%!"=="" set /A len+=1 & goto :strLen_Loop
(endlocal & set %2=%len%)
goto :eof

@echo off
set var=13145
set /A var=%var% + 5
echo %var%

%variable:~num_chars_to_skip% 
%variable:~num_chars_to_skip,num_chars_to_keep%

@echo off 
set x=1000 
set y=1 
set y=%y% 
echo %x% 

set y=%y:~-4% 
echo %y%

@echo off 
set str=Batch scripts is easy. It is really easy. 
echo %str% 
:: 删除is
set str=%str:is=% 
echo %str%
:: Batch scripts easy. It really easy.

@echo off 
set str=Batch scripts is easy. It is really easy 
echo %str% 

set str=%str:~1,-1% 
echo %str%
:: atch scripts is easy. It is really eas

@echo off 
set str=This string    has    a  lot  of spaces 
echo %str% 

set str=%str:=% 
echo %str%
:: Thisstringhasalotofspaces

@echo off 
set str=This message needs changed. 
echo %str% 

set str=%str:needs=has% 
echo %str%
:: This message has changed.

set a[0]=1

@echo off 
set list=1 2 3 4 
(for %%a in (%list%) do ( 
   echo %%a 
))

echo %a[0]%

Set a[3]=4 

@echo off 
setlocal enabledelayedexpansion 
set topic[0]=comments 
set topic[1]=variables 
set topic[2]=Arrays 
set topic[3]=Decision making 
set topic[4]=Time and date 
set topic[5]=Operators 

for /l %%n in (0,1,5) do ( 
   echo !topic[%%n]! 
)

@echo off 
set Arr[0]=1 
set Arr[1]=2 
set Arr[2]=3 
set Arr[3]=4 
set "x=0" 
:SymLoop 

if defined Arr[%x%] ( 
   call echo %%Arr[%x%]%% 
   set /a "x+=1"
   GOTO :SymLoop 
)
echo "The length of the array is" %x%

@echo off 
set len=3 
set obj[0].Name=Joe 
set obj[0].ID=1 
set obj[1].Name=Mark 
set obj[1].ID=2 
set obj[2].Name=Mohan 
set obj[2].ID=3 
set i=0 
:loop 
if %i% equ %len% goto :eof 
set cur.Name= 
set cur.ID=
for /f "usebackq delims==.tokens=1-3" %%j in (`set obj[%i%]`) do ( 
   set cur.%%k=%%l 
) 
echo Name=%cur.Name% 
echo Value=%cur.ID% 
set /a i=%i%+1 
goto loop

if %c%==15 (echo "The value of variable c is 15") else (echo "Unknown value") 

if defined str1 echo "Variable str1 is defined"

if exist C:\set3.txt (echo "File exists") else (echo "File does not exist")

if errorlevel n somecommand

@echo off 
SET /A a=5 

if %a%==5 goto :labela 
if %a%==10 goto :labelb
:labela 
echo "The value of a is 5" 
exit /b 0
:labelb 
echo "The value of a is 10"

echo %DATE%

@echo off 
echo/Today is: %year%-%month%-%day% 
goto :EOF 
setlocal ENABLEEXTENSIONS 
set t=2&if "%date%z" LSS "A" set t=1 

for /f "skip=1 tokens=2-4 delims=(-)" %%a in ('echo/^|date') do ( 
   for /f "tokens=%t%-4 delims=.-/ " %%d in ('date/t') do ( 
      set %%a=%%d&set %%b=%%e&set %%c=%%f)) 
endlocal&set %1=%yy%&set %2=%mm%&set %3=%dd%&goto :EOF

echo %TIME%

DIR C:\ > lists.txt 2> &1

:function_name 
Do_something 
EXIT /B 0

:Display 
SET /A index=2 
echo The value of index is %index% 
EXIT /B 0

@echo off
Rem main
SETLOCAL
CALL :Display 5 , 10
EXIT /B %ERRORLEVEL%
Rem function
:Display
echo The value of parameter 1 is %~1
echo The value of parameter 2 is %~2
EXIT /B 0

:: 获取内存大于40MB的进程
tasklist /fi "memusage gt 40000"

:: 获取内存大于40MB的进程
tasklist /fi "memusage gt 40000"

START "title" [/D path] [options] "command" [parameters]

:: 杀死(终止)打开的记事本任务
taskkill /f /im notepad.exe
:: 杀死了一个ID为9901的进程
taskill /pid 9901

START "title" [/D path] [options] "command" [parameters]

:: 在新窗口中运行批处理脚本test.bat。 窗口将以最小化模式启动，并且指定为:“Test Batch Script”。
START "Test Batch Script" /Min test.bat
:: 在另一个进程中运行Microsoft Word，然后在MS Word中打开文件TESTA.txt
START "" "C:\Program Files\Microsoft Office\Winword.exe" "D:\test\TESTA.txt"

dw=dir /w

DOSKEY [options] [macroname=[text]]

@echo off
doskey cd=cd/test
doskey d=dir

@echo off
doskey cd=cd/test
doskey d=dir
d=

:: 两个命令同时启动，但是sort命令暂停，直到它接收到dir命令的输出。 
:: sort命令使用dir命令的输出作为输入，然后将其输出发送到句柄1(即STDOUT)。
dir C:\ | sort