update startup.sh
create the DataSource bean in the .xml way
use the 'xdj' database with the default user 'postgres' and the password as '424242'(you know what '42' means, ^_^)
debug: correct the .sql
add 'users' database table sqlgen
add test data insertion SQL file
refine the persist layer structure with moving the mapper package into persist.impl
node can be queryed