Question

我在编写Windows Batch Script时需要一些帮助。我有一个Delimeted Text文件，其数据如下所示：

1|2|3|4|5|6
1|2|3|4|5|6
1|2|3|4|5|6
1|2|3|4|5|6
1|2|3|4|5|6
1|2|3|4|5|6.

我想编写一个脚本，我可以编辑此文本文件以删除数据的第一个和最后一个字段。这样输出文本文件将包含以下数据：

2|3|4|5
2|3|4|5
2|3|4|5
2|3|4|5
2|3|4|5
2|3|4|5.

请帮帮我。

提前致谢。

此致 Vibhor

Answer 1

可以编写纯批处理解决方案，但要编写一个可以处理任何内容的强大解决方案是非常棘手的，最终结果会很慢。

使用JScript和正则表达式完成任务非常容易，但不是每个人都知道这些技术（尽管可能有更多人知道JScript和正则表达式而不是知道批处理！）

我编写了一个名为REPL.BAT的混合JScript /批处理实用程序，可以从命令行或批处理文件中轻松调用。它执行正则表达式搜索并替换stdin并将结果写入stdout。它适用于所有现代版本的Windows，从XP开始。

使用REPL.BAT

轻松有效地完成您的任务

假设每一行都有6个值（空值OK，但总是有5个分隔符）：

type test.txt|repl "^[^|]*\|(.*)\|[^|]*$" "$1" >test.txt.new
move /y test.txt.new test.txt

如果某些行在末尾缺少值（缺少值假定为空）：

type test.txt|repl "(^[^|]*(\|[^|]*){4})\|[^|]*$" "$1"|repl "^[^|]*\|?(.*)$" "$1" >test.txt.new
move /y test.txt.new test.txt

这是REPL.BAT实用程序。它应该放在与批处理脚本和文件相同的文件夹中，或者更好地放在驻留在PATH中的文件夹中。完整的文档内置于脚本中。

@if (@X)==(@Y) @end /* Harmless hybrid line that begins a JScript comment

::************ Documentation ***********
:::
:::REPL  Search  Replace  [Options  [SourceVar]]
:::REPL  /?
:::
:::  Performs a global search and replace operation on each line of input from
:::  stdin and prints the result to stdout.
:::
:::  Each parameter may be optionally enclosed by double quotes. The double
:::  quotes are not considered part of the argument. The quotes are required
:::  if the parameter contains a batch token delimiter like space, tab, comma,
:::  semicolon. The quotes should also be used if the argument contains a
:::  batch special character like &, |, etc. so that the special character
:::  does not need to be escaped with ^.
:::
:::  If called with a single argument of /? then prints help documentation
:::  to stdout.
:::
:::  Search  - By default this is a case sensitive JScript (ECMA) regular
:::            expression expressed as a string.
:::
:::            JScript regex syntax documentation is available at
:::            http://msdn.microsoft.com/en-us/library/ae5bf541(v=vs.80).aspx
:::
:::  Replace - By default this is the string to be used as a replacement for
:::            each found search expression. Full support is provided for
:::            substituion patterns available to the JScript replace method.
:::            A $ literal can be escaped as $$. An empty replacement string
:::            must be represented as "".
:::
:::            Replace substitution pattern syntax is documented at
:::            http://msdn.microsoft.com/en-US/library/efy6s3e6(v=vs.80).aspx
:::
:::  Options - An optional string of characters used to alter the behavior
:::            of REPL. The option characters are case insensitive, and may
:::            appear in any order.
:::
:::            I - Makes the search case-insensitive.
:::
:::            L - The Search is treated as a string literal instead of a
:::                regular expression. Also, all $ found in Replace are
:::                treated as $ literals.
:::
:::            B - The Search must match the beginning of a line.
:::                Mostly used with literal searches.
:::
:::            E - The Search must match the end of a line.
:::                Mostly used with literal searches.
:::
:::            V - Search and Replace represent the name of environment
:::                variables that contain the respective values. An undefined
:::                variable is treated as an empty string.
:::
:::            M - Multi-line mode. The entire contents of stdin is read and
:::                processed in one pass instead of line by line. ^ anchors
:::                the beginning of a line and $ anchors the end of a line.
:::
:::            X - Enables extended substitution pattern syntax with support
:::                for the following escape sequences:
:::
:::                \\     -  Backslash
:::                \b     -  Backspace
:::                \f     -  Formfeed
:::                \n     -  Newline
:::                \r     -  Carriage Return
:::                \t     -  Horizontal Tab
:::                \v     -  Vertical Tab
:::                \xnn   -  Ascii (Latin 1) character expressed as 2 hex digits
:::                \unnnn -  Unicode character expressed as 4 hex digits
:::
:::                Escape sequences are supported even when the L option is used.
:::
:::            S - The source is read from an environment variable instead of
:::                from stdin. The name of the source environment variable is
:::                specified in the next argument after the option string.
:::

::************ Batch portion ***********
@echo off
if .%2 equ . (
  if "%~1" equ "/?" (
    findstr "^:::" "%~f0" | cscript //E:JScript //nologo "%~f0" "^:::" ""
    exit /b 0
  ) else (
    call :err "Insufficient arguments"
    exit /b 1
  )
)
echo(%~3|findstr /i "[^SMILEBVX]" >nul && (
  call :err "Invalid option(s)"
  exit /b 1
)
cscript //E:JScript //nologo "%~f0" %*
exit /b 0

:err
>&2 echo ERROR: %~1. Use REPL /? to get help.
exit /b

************* JScript portion **********/
var env=WScript.CreateObject("WScript.Shell").Environment("Process");
var args=WScript.Arguments;
var search=args.Item(0);
var replace=args.Item(1);
var options="g";
if (args.length>2) {
  options+=args.Item(2).toLowerCase();
}
var multi=(options.indexOf("m")>=0);
var srcVar=(options.indexOf("s")>=0);
if (srcVar) {
  options=options.replace(/s/g,"");
}
if (options.indexOf("v")>=0) {
  options=options.replace(/v/g,"");
  search=env(search);
  replace=env(replace);
}
if (options.indexOf("l")>=0) {
  options=options.replace(/l/g,"");
  search=search.replace(/([.^$*+?()[{\\|])/g,"\\$1");
  replace=replace.replace(/\$/g,"$$$$");
}
if (options.indexOf("b")>=0) {
  options=options.replace(/b/g,"");
  search="^"+search
}
if (options.indexOf("e")>=0) {
  options=options.replace(/e/g,"");
  search=search+"$"
}
if (options.indexOf("x")>=0) {
  options=options.replace(/x/g,"");
  replace=replace.replace(/\\\\/g,"\\B");
  replace=replace.replace(/\\b/g,"\b");
  replace=replace.replace(/\\f/g,"\f");
  replace=replace.replace(/\\n/g,"\n");
  replace=replace.replace(/\\r/g,"\r");
  replace=replace.replace(/\\t/g,"\t");
  replace=replace.replace(/\\v/g,"\v");
  replace=replace.replace(/\\x[0-9a-fA-F]{2}|\\u[0-9a-fA-F]{4}/g,
    function($0,$1,$2){
      return String.fromCharCode(parseInt("0x"+$0.substring(2)));
    }
  );
  replace=replace.replace(/\\B/g,"\\");
}
var search=new RegExp(search,options);

if (srcVar) {
  WScript.Stdout.Write(env(args.Item(3)).replace(search,replace));
} else {
  while (!WScript.StdIn.AtEndOfStream) {
    if (multi) {
      WScript.Stdout.Write(WScript.StdIn.ReadAll().replace(search,replace));
    } else {
      WScript.Stdout.WriteLine(WScript.StdIn.ReadLine().replace(search,replace));
    }
  }
}

Answer 2

从GnuWin

尝试sed

sed "s/^1|//;s/|6//" file

或cmd shell：

for /f "tokens=2-6delims=|6" %a in (file) do @echo(%a^|%b^|%c^|%d%e

用于处理平面文件的Windows Batch脚本

2 个答案: