Merge pull request #1 from tedqiao/master

test
test
NEW ER MAP
tables in sql
Merge pull request #3 from ycj28c/master

upload new document
Merge pull request #4 from ycj28c/master

add the jdbc library
Merge pull request #5 from ycj28c/master

upload db connection code and test code
update of DB dict. and unload tables in java
Merge pull request #6 from yzheng2/master

update
Merge pull request #7 from ycj28c/master

update database config file
Merge pull request #4 from tedqiao/master

get new