utf 8 - Get ant concat to ignore BOM's'? - Stack Overflow

admin管理员组

文章数量:1289529

I have an ant build that concatenates my javascript into one file and then presses it. The problem is that Visual Studio's default encoding attaches a BOM to every file. How do I configure ant to strip out BOM's that would otherwise appear in the middle of the resulting concatenated file?

My googl'ing revealed this discussion which is the exact problem I'm having but doesn't provide a solution: /?l=ant-user&m=118598847927096

I have an ant build that concatenates my javascript into one file and then presses it. The problem is that Visual Studio's default encoding attaches a BOM to every file. How do I configure ant to strip out BOM's that would otherwise appear in the middle of the resulting concatenated file?

My googl'ing revealed this discussion which is the exact problem I'm having but doesn't provide a solution: http://marc.info/?l=ant-user&m=118598847927096

• ant
• utf-8
• javascript
• yui-pressor

Share Improve this question Follow asked Apr 30, 2010 at 6:37 Breck FresenBreck Fresen 29555 silver badges1212 bronze badges

Add a ment  | 

1 Answer 1

Sorted by: Reset to default 13

The Unicode byte order mark codepoint is U+FEFF. This concatenation mand will strip out all BOM characters when concatenating two files:

<concat encoding="UTF-8" outputencoding="UTF-8" destfile="nobom-concat.txt">
  <filelist dir="." files="bom1.txt,bom2.txt" />
  <filterchain>
    <deletecharacters chars="&#xFEFF;" />
  </filterchain>
</concat>

This form of the concat mand tells the task to decode the files as UTF-8 character data. I'm assuming UTF-8 as this is usually where Java/BOM issues occur.

In UTF-8, the BOM is encoded as the bytes EF BB BF. If you needed it to appear at the start of the resultant file, you could use a subsequent concatenation to prefix the output file with a BOM again.

Encoded values for U+FEFF in other UTF encodings are listed here.

本文标签： utf 8Get ant concat to ignore BOM39s39Stack Overflow