Regex 使用Ant替换文件中的所有uu，但仅替换特定字符串中的uu？

这看起来应该很简单：使用Ant任务，我可以使用replaceregexp来替换文件中某些字符串中的所有重复字符吗

文件内容：

Blah blah blah <ac:link> words_with_underscores_to_turn_to_spaces</link>
Blah blah blah Blah blah blah Blah blah blah Blah blah blah
Words_with_underscores_that_I_want_to_keep. Blah blah blah Blah blah blah. 

这将用空格替换链接中的下划线，并将链接移动到新文件中，但不包括源文件的其余部分，因为我只匹配了链接。有什么想法吗？

使用

是在

中使用条件逻辑的好方法

在下面的脚本中，

将整个输入文件视为单个令牌。这允许JavaScript跨换行符匹配标记

蚂蚁脚本

-1;
如果（继续）{
var openingAcLinkEndIndex=openingAcLinkBeginIndex+openingTagFormat.length；
var closingAcLinkBeginIndex=originalFile.indexOf（closingTagFormat，openingAcLinkEndIndex）；
keepGoing=ClosingClinkBeginIndex>-1；
如果（继续）{
transformedFile+=originalFile.slice（originalFileIndex，openingAcLinkEndIndex）；
var closingaclinkedindex=closingAcLinkBeginIndex+closingTagFormat.length；
var stringBetweenAcLinkTags=originalFile.slice（打开ClinkIndex，关闭ClinkBeginIndex）；
transformedFile+=stringBetweenAcLinkTags.replace（/g/g'）；
transformedFile+=originalFile.slice（ClosingClinkBeginIndex，ClosingClinkIndex）；
原始文件索引=ClosingClinkendIndex；
}
}
}
transformedFile+=originalFile.substring（originalFileIndex）；
self.setToken（transformedFile）；
]]>

输出

废话废话用下划线变成空格
废话废话废话废话废话废话废话废话
带下划线的单词表示我希望保留的内容。废话废话废话。

Blah blah blah <ac:link> words with underscores to turn to spaces</link> 
Blah blah blah Blah blah blah Blah blah blah Blah blah blah 
Words_with_underscores_that_I_want_to_keep. Blah blah blah Blah blah blah. 

  <copy todir=".\test_output">
   <filterchain>
   <tokenfilter>
     <containsregex pattern="(ac:link.*?link)" flags="gi"/>
    <replacestring from="_" to=" "/>
   </tokenfilter>
  </filterchain>
  <fileset dir=".\underscore_test_output" includes="**/*.txt"/>
 </copy>

<copy todir="${out.dir}">
  <fileset dir="${basedir}" includes="test.txt"/>
  <filterchain>
    <tokenfilter>
      <filetokenizer/>
      <scriptfilter language="javascript"><![CDATA[
        var originalFile = self.getToken();
        var originalFileIndex = 0;
        var transformedFile = '';
        var keepGoing = true;

        // The "ac:" vs no "ac:" discrepency between the opening and closing 
        // tags is in the sample text from the question.
        var openingTagFormat = '<ac:link>';
        var closingTagFormat = '</link>';

        while (keepGoing) {
          var openingAcLinkBeginIndex = originalFile.indexOf(openingTagFormat, originalFileIndex);
          keepGoing = openingAcLinkBeginIndex > -1;
          if (keepGoing) {
            var openingAcLinkEndIndex = openingAcLinkBeginIndex + openingTagFormat.length;
            var closingAcLinkBeginIndex = originalFile.indexOf(closingTagFormat, openingAcLinkEndIndex);
            keepGoing = closingAcLinkBeginIndex > -1;
            if (keepGoing) {
              transformedFile += originalFile.slice(originalFileIndex, openingAcLinkEndIndex);
              var closingAcLinkEndIndex = closingAcLinkBeginIndex + closingTagFormat.length;
              var stringBetweenAcLinkTags = originalFile.slice(openingAcLinkEndIndex, closingAcLinkBeginIndex);
              transformedFile += stringBetweenAcLinkTags.replace(/_/g, ' ');
              transformedFile += originalFile.slice(closingAcLinkBeginIndex, closingAcLinkEndIndex);
              originalFileIndex = closingAcLinkEndIndex;
            }
          }
        }

        transformedFile += originalFile.substring(originalFileIndex);

        self.setToken(transformedFile);
      ]]></scriptfilter>
    </tokenfilter>
  </filterchain>
</copy>

Blah blah blah <ac:link> words with underscores to turn to spaces</link>
Blah blah blah Blah blah blah Blah blah blah Blah blah blah
Words_with_underscores_that_I_want_to_keep. Blah blah blah Blah blah blah.