问题
I have a CSV file with special accents and saving it in Notepad by selecting UTF-8 encoding. When I read the file using Java, it reads the BOM characters too.
So I want to save this file in UTF-8 format without appending a BOM initially in Notepad.
Otherwise is there any built-in class in Java that eliminates the BOM characters that present at beginning, when reading the contents in a file?
回答1:
Use Notepad++ - free and much better than Notepad. It will help to save text without BOM using Enconding > Encode in UTF-8 without BOM:
When I encountered this problem in Java, I haven't found any library to parse these first three bytes (BOM). So my advice:
- Use
PushbackInputStream(in, 3). - Read the first three bytes
- If it's not BOM (EF BB BF), push them back
- Process the stream as UTF-8
- Use
回答2:
Use Notepad++ instead. See my personal blog post on it. From within Notepad++, choose the "Encoding" menu, then "Encode in UTF-8 without BOM".
回答3:
I just learned from this Stack Overflow post, as @martin-geisler points out, that you CAN save files without the BOM in Windows Notepad, by selecting ANSI as the encoding.
I'm assuming that for more advanced uses this won't work because the resulting file is probably not the end encoding wished, but actually ANSI; but I tested and confirmed this works to save a very small .php script without BOM using only Notepad.
I learned the long, hard way that Windows' Notepad is not a true editor, although I'd like to point out for others that, despite this, it is misleadingly called up when you type "editor" on newer Windows machines, at least on one of mine.
I am currently using Emacs and other editors to solve this problem.
回答4:
Notepad on Windows 10 1903 and later versions supoprt saving to UTF-8 without BOM. In fact, UTF-8 is the default file format now.
Reference: https://www.bleepingcomputer.com/news/microsoft/windows-10-notepad-is-getting-better-utf-8-encoding-support/
回答5:
The answer is: Not at all. Notepad can't do that.
In Java you can just skip the first byte in your InputStream and be done.
回答6:
You might want to try out Notepad2 or Notepad++. Those Notepad replacements have the option for you to choose whether to output BOM.
As for a Java solution, as far as I know, Java does not understand the standard UTF-8. I googled and found Java's UTF-8 and Unicode writing is broken - Use this fix that might be the solution.
回答7:
We're using the utility BOMStripperInputStream.java to strip the BOM from our input if present.
来源：https://stackoverflow.com/questions/8432584/how-to-make-notepad-to-save-text-in-utf-8-without-bom