After reading the reference document, I feel that hibernate is like a bridge, a bridge that leads to a table to the database. In the past, my Java development was written in a class specifically to increase, delete, and changed a table, and I felt very boring. Now there is hibernate, greatly simplifies this, just write a good table's profile, and a basic class (only a table of the set and get method of a table), then in the program As long as you open a session, you can add, delete, change the table directly, and have a transaction processing function. Just temporarily don't know, how to live data, and turn the data, if Hibernate can solve this problem, then I will improve the development model I formed in the past. Ok, continue learning ~~~~