sinoalex

非常好的hibernate教程，简单明了。摘抄一部分，原文地址：http://www.tutorialspoint.com/hibernate/hibernate_query_language.htm Hibernate Query Language (HQL) is an object-oriented query language, similar to SQL, but ins...

  java.sql.Connection接口提供了三个在执行插入语句后可取的自动生成的主键的方法。1//第一个是2PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throwsSQLException;  3其中autoGenerateK...

自己的小网站在测试机器上长时间不访问后（默认8小时过期），再次访问发现有如下错误：Caused by: com.mysql.jdbc.exceptions.jdbc4.CommunicationsException: The last packet successfully received from the server was 63,020,509 milliseconds ago...