批处理处理文本文件去重复实现代码

@echo off
:: Code by oicu#lsxk.org 2007/11/29

rem chcp 437>nul
:: 看情况使用，utf-8编码的文件不能少了chcp命令，一般无需使用，
:: 但无论是否使用都不支持utf-16的文件。

:: pushd "%~dp1"
:: 如果不用pushd和popd，文件都要用绝对路径不能只用文件名。

if "%~1"=="" goto :EOF
set outputfile=%~dpn1_output%~x1

type nul>"%outputfile%"

echo Waiting...

for /F "tokens=1* delims=:" %%i in ('findstr /n .* "%~1"') do (
  findstr /B /E /C:"%%j" "%outputfile%">nul 2>&1 || echo.%%j>>"%outputfile%"
)

pause
start "" notepad "%outputfile%"
:: popd
exit

Const adOpenStatic = 3
Const adLockOptimistic = 3
Const adCmdText = &H0001 
Set objConnection = CreateObject("ADODB.Connection")
Set objRecordSet = CreateObject("ADODB.Recordset")

strPathToTextFile = "C:\"
strFile = "Test.txt"

objConnection.Open "Provider=Microsoft.Jet.OLEDB.4.0;" & _
   "Data Source=" & strPathtoTextFile & ";" & _
     "Extended Properties=""text;HDR=NO;FMT=Delimited"""

objRecordSet.Open "Select DISTINCT * FROM " & strFile, _
  objConnection, adOpenStatic, adLockOptimistic, adCmdText

Do Until objRecordSet.EOF

Set objFSO = CreateObject("Scripting.FileSystemObject")
   set Fp=objFSO.OpenTextFile("C:\test1.txt",8,True,0)
   fp.WriteLine objRecordSet.Fields.Item(0).Value
   fp.close
   set objFSO = nothing
   objRecordSet.MoveNext
Loop