java，

java，

http://lavasoft.blog.51cto.com/62575/27069/ 多线程

http://blog.csdn.net/maosidiaoxian/article/details/36478397#comments JDBC简单实现

http://blog.csdn.net/dongliheng/article/details/1699280 Log4j

https://code.csdn.net/likerxu/adt_worksheet