MD5 checksums are good to verify the integrity of files and It's easy to generate MD5 checksum in Java. Java provides a couple of ways to generate the MD5 checksum for any file, you can either use java.security.MessageDigest or any open source library like Apache commons-codec or Spring. All 3 ways we have seen in our earlier article about generating the MD5 hash for String is also applicable to generate the MD5 checksum for any file. Since most of the md5() or md5Hex() method takes byte[], you can simply read bytes from InputStream or pass to these md5 methods.