Worked for many years, done and learned a lot
Engaged in ORM framework, read spring, struts2, mina, proxool, source code.
studied spring mvc
Engaged in IM architecture and implementation, engaged in hive and hadoop.
Unfortunately, there is no complete record, the only records are fragments, sporadic things, not systematic.
What is even more tragic is that most of them have been forgotten, which is a painful lesson.
Decided to sort out and record what I learned, made up my mind and worked hard.