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18 Dec 09

using Java to get a file's md5 checksum? - Stack Overflow

  • java.security.DigestInputStream
  • MessageDigest md = MessageDigest.getInstance("MD5");
    InputStream is = new FileInputStream("file.txt");
    try {
          is = new DigestInputStream(is, md);
          // read stream to EOF as normal...
    }
    finally {
          is.close();
    }
    byte[] digest = md.digest();
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