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We've got our servers running on CentOS and our Java backend sometimes has to process a file that was originally generated on a Windows machine (by one of our clients) using CP-1252, however in 95%+ use cases, we are processing UTF-8 files.

My question: if we know that certain files will always be UTF-8, and other files will always be CP-1252, is it possible to specify in Java the character set to use for reading in each file? If so:

  • Do we need to do anything at the systems-level for adding CP-1252 to CentOS? If so, what does this involve?
  • What Java objects would we use to apply the correct encoding on a per file basis?

Thanks in advance!

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All you need to do is specify what charset/encoding the original file was written in while using the XXXReader(InputStream in, Charset cs). For e.g. look at InputStreamReader

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My question: if we know that certain files will always be UTF-8, and other files will always be CP-1252, is it possible to specify in Java the character set to use for reading in each file?

Assuming you're in charge of the code reading the file, it should be fine. Create a FileInputStream, then wrap it in an InputStreamReader specifying the relevant character encoding.

Do we need to do anything at the systems-level for adding CP-1252 to CentOS? If so, what does this involve?

That depends on what the JRE supports. I've never used CentOS, so I don't know whether it's likely to come with the relevant encoding as part of the JRE. You can use Charset.isSupported to check though, and Charset.availableCharsets to list what's available.

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