gawk -F"=" "NR==FNR{A[$1]=$2;next}{print A[$0]}" a.txt b.txt>c.txt
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@echo off&setlocal enabledelayedexpansion
for /f "delims=" %%i in (a.txt) do set "_%%i"
for /f "delims=" %%i in (b.txt) do (
     if defined _%%i (
        echo !_%%i!
     )  else echo;%%i
)
pause
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@if (0)==(0) echo off
cscript //nologo //E:JScript "%~0"<"b.txt" "a.txt" 
pause&exit
content
@end;
var fso = new ActiveXObject("Scripting.FileSystemObject");
function adoLoadText(filename, charset) {
  var stream, text;
  stream = new ActiveXObject("ADODB.Stream");
  stream.type = 2;
  stream.charset = charset;
  stream.open();
  stream.loadFromFile(filename);
  text = stream.readText(-1);
  stream.close();
  return text;
}
var text = adoLoadText(WScript.Arguments.Item(0), 'utf-8');
var arr = [];
var newfile = 'c.txt';//保存文件
while (!WScript.StdIn.AtEndOfStream){
    var str = WScript.StdIn.Readline();
    var re = new RegExp(str + "=(.+)","i");
    var r = text.match(re)
    arr.push(r?r[1]:str)
}
var f = fso.OpenTextFile(newfile,2,true,false);
f.WriteLine(arr.join('\n'));
f.Close()
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$myPath = $MyInvocation.MyCommand.Path -replace '\\[^\\]*$', '\';
$fileA = $myPath + 'a.txt';            #源文本A
$fileB = $myPath + 'b.txt';            #源文本B
$fileC = $myPath + 'c.txt';            #目标文本C

If (![IO.File]::Exists($fileA) -or ![IO.File]::Exists($fileB)){
    echo '源文件不存在';
    [Console]::ReadLine();
    exit;
}

$Hash = New-Object System.Collections.HashTable;                              #HashTable，存放文本A数据
$srA = New-Object System.IO.StreamReader($fileA, [Text.Encoding]::Default);   #读文本A
$srB = New-Object System.IO.StreamReader($fileB, [Text.Encoding]::Default);   #读文本B
$swC = New-Object System.IO.StreamWriter($fileC, $false, [Text.Encoding]::Default); #写文件C

while($srA.Peek() -ge 0){
    $strLine = $srA.ReadLine();           #逐行读文本A
    $arr = $strLine.Split('=', 2);        #用'='分割成数组
    If ($arr.Count -eq 2){
        $key = $arr[0];
        $value = $arr[1];
        If (!$Hash.ContainsKey($key)){
            $Hash.Add($key, $value);      #存入HashTable
        }
    }
}
$srA.Dispose();
$srA.Close();

while($srB.Peek() -ge 0){
    $strLine = $srB.ReadLine();           #逐行读文本B
    If ($Hash.ContainsKey($strLine)){
        $strLine = $Hash[$strLine];       #重新赋值
    }
    $swC.WriteLine($strLine);             #写文件C
    $swC.Flush();
}
$srB.Dispose();
$srB.Close();
$swC.Dispose();

echo 'Done';
[Console]::ReadLine();
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"C:\SoftWare\gawk.exe" -F"=" "NR==FNR{A[$1]=$2;next}{print A[$0]}" "D:\00\a.txt" "D:\11\b.txt">"D:\22\c.txt"
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