N some summary of JSP after a long time

I have learned JSP for more than a year. I read a lot of related books on and off this year, but I still feel that I am not skilled enough. There are a lot of things that you know about, but you just have to look at the projects you have done before. In the past, Baidu or Google was often used to understand everything. Now, we have to re-check what we know. A serious waste of time.

During the course design last night, even <input type = "hidden" name = "XXX" value = "XXXX"/> in HTML needs Baidu.