findstr /i /v /x /g:1.txt 2.txt>3.txt
findstr /i /v /x /g:2.txt 1.txt>>3.txt
findstr /i /x /g:1.txt 2.txt>4.txt
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@echo off

:choose
echo.&echo 请选择操作类型：
echo.&echo 1 - 比较两个文本并将相同内容输出
echo.&echo 2 - 比较两个文本并将不同内容输出
echo.&echo 3 - 两个文本内容合并后将相同内容只保留一个输出 
echo.&echo 0 - 退出批处理

echo.&set choose=&set /p choose=选择要执行的序号：
if %choose% equ 0 exit
for /l %%a in (1,1,3) do if %choose% equ %%a (
call :setfile
call :%%a
cls&echo.&echo 处理完毕！继续选择操作类型：
goto :choose
)
cls&echo.&echo 输入的序号有误，请重新选择！&goto :choose

:setfile
echo.&set file1=&set /p file1=请输入要比较的第一个文件名：
set file1=%file1:"=%
echo.&set file2=&set /p file2=请输入要比较的第二个文件名：
set file2=%file2:"=%
echo.&set outfile=&set /p outfile=请输入最后结果保存的文件名：
set outfile=%outfile:"=%
goto :eof

:1
findstr /i /g:"%file1%" "%file2%">"%outfile%"
goto :eof

:2
call :1
findstr /i /v /g:"%outfile%" "%file1%">"%outfile%.bak"
findstr /i /v /g:"%outfile%" "%file2%">>"%outfile%.bak"
sort "%outfile%.bak">"%outfile%"
del "%outfile%.bak"
goto :eof

:3
(type "%file1%"&echo.&type "%file2%")>"%outfile%"
cd.>"%outfile%.bak"
for /f "delims=" %%i in ('type "%outfile%"') do (if not defined %%i set %%i=A & echo %%i>>"%outfile%.bak")
move /y "%outfile%.bak" "%outfile%"
goto :eof
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