Explain in detail the basic methods of implementing SHA1 and MD5 encryption algorithms in Java

SHA1

MD5

MD5 (message digest algorithm 5), that is, the fifth edition of message digest algorithm. Message digest is an algorithm: no matter how long the original data is, the result of message digest is of fixed length; it is an irreversible algorithm. The change of any bit of the original data will lead to a great difference in the result of message digest, and the probability of calculating the original data according to the result is very low It can be regarded as the fingerprint of the original data, and the original data is different if the fingerprint is different.

PS: here are two MD5 encryption tools for you. Interested friends can refer to:

MD5 online encryption tool:

http://tools.jb51.net/password/CreateMD5Password

http://tools.jb51.net/password/hash_md5_sha