oracle的乐观锁和悲观锁

oracle悲观锁和乐观锁，链接：



http://www.2cto.com/database/201405/298075.html

java悲观锁和乐观锁，链接：

http://blog.163.com/ainiyiwannian2046@126/blog/static/4910134020093221132298/