Example of MD5 encryption algorithm of Java irreversible encryption algorithm

The full name of MD5 is message digest algorithm 5. Message digest generally refers to the hash transformation of byte string (message), which is to transform a byte string of any length into a large integer of a certain length. MD5 transforms any length of "byte string" into a 128bit large integer, and it is an irreversible string transformation algorithm. In other words, even if you see the source program and algorithm description, you can't transform the value of MD5 back to the original string. Mathematically speaking, there are infinite original strings, This is a bit like a mathematical function without an inverse function.