zhang_yingjie
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最新评论
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shenzhongji：
不错 对于我来说有很大的帮助谢谢了
绝对定位和相对定位 -
水果硬糖：
果然不报这个错误了
解决tomcat启动产生[SetPropertiesRule]警告问题 -
fjjiaboming：
还是不行.
解决tomcat启动产生[SetPropertiesRule]警告问题 -
ppm10103：
ClassLoader
遗留问题 -
pop1030123：
解析以下面这个字符串命名的目录名是不是就会出错了
~!@#$% ...
file协议
文章列表
http://www.ksvali.com/wp-content/uploads/2009/04/securitiestradeprocessing_04.pdf
http://books.google.co.in/books?id=_vAVps_1K7MC&hl=zh-CN&source=gbs_similarbooks
donot remember where to get the resource, thanks to original writer.
The Managed Servers in a production WebLogic Server environment are often distributed across multiple machines and geographic locations.
Node Manager is a Java utility that runs as separate process from WebLogic Server and allows you to perform common operations tasks for a Managed Server, regardles ...
the tool was found in tibco community, need to validate if it works.
1.note that add ejb to ear as a dependency
http://www.oracle.com/technetwork/cn/topics/entarch/packaging-best-practices-100465-zhs.html
search google to find how to get previous day in shell script
echo "Usage: catalina.sh ( commands ... )"
echo "commands:"
if $os400; then
echo " debug Start Catalina in a debugger (not available on OS400)"
echo " debug -security Debug C ...
inheritance mapping
- 博客分类：
- java
the three strategies:
table per class hierarchy
table per subclass
table per concrete class
1.Table per class hierarchy
Suppose we have an interface Payment with the implementors CreditCardPayment and CashPayment. The table per class hierarchy mapping would display in the following way:
<clas ...
1.用listener初始化log4j
2.servlet的日志记录在应用服务器日志里，servletContext.log();
1.通过抛出异常，然后分析异常串来获得调用日志接口的类
2.将conversionPattern中的pattern解析出来，形成pattern链来实现日志的格式化输出
The Logging package is an ultra-thin bridge between different logging implementations.
Note that commons-logging does not attempt to initialise or terminate the underlying logging implementation that is used at runtime; that is the responsibility of the application.
更新丢失：当有两个写进程同时修改相同的数据时，往往会出现一个写进程做的修改覆盖了另一个写进程的修改。这种情况是完整性问题最常见的类型。互斥锁的设计就是防范这种问题的出现。
脏读：一个事务修改的数据在提交前被另一个事务读取，就会发生脏读。由于事务提交的修改有可能会被回滚，因而其他事务读取的这个数据就可能不正确。为了避免读锁导致的竞争，许多数据库都允许脏读。
不可重复读：由于其他事务的修改，可能出现不可重复的读。例如一个事务根据某个条件做查询。当这个事务得到返回结果集之后，但是在这个事务完成之前，另一个事务修改了数据，使得某些数据不再满足前一个事务的查询条件。如果这个时候前一个事务重复这一个查询操作 ...