How to get the MD5 checksum for a file

MD5 Hashsums are use to confirm the integrity of files. That is especially important when very large files are downloaded or moved from one location to another. To check the integrity of a file, its corresponding MD5 file can be downloaded and compared to the MD5 created locally on the file downloaded.


The program below can be used to create the MD5 hash for a file using the Apache Commons Codec lib:



The Windows program "md5sums" creates MD5 hashes.

In Unix, the BSD program "md5sum" creates MD5 hashes.


Reference
http://www.rgagnon.com/javadetails/java-0416.html

http://commons.apache.org/codec/

http://www.pc-tools.net/win32/md5sums/