Java Web (III) session mechanism, cookie and session details

Most of them should know what the conversational mechanism is and can say a few words. I also know a little about it. However, I don't need to learn it for a few days. I immediately forget it. The reason may be that I can't understand the two conversational mechanisms well, so I will always forget it and always go back to learn it. Today, I'll sum it up, Learn from the content of this article, because I think this article is really well written and answers many of my questions. It is characterized by the understanding of cookies and sessions. The example of membership card is really a striking effect. I rearrange a copy according to my own ideas and show it to myself in the future.