J2EE、WEBGIS项目开发 Tapestry、Prado、Zend框架学习

Tomcat启动时classloader加载顺序
  Tomcat的class加载的优先顺序一览  
  1.最先是$JAVA_HOME/jre/lib/ext/下的jar文件。  
  2.环境变量CLASSPATH中的jar和class文件。  
  3.$CATALINA_HOME/common/classes下的class文件。  
  4.$CATALINA_HOME/commons/endorsed下的jar文件。  
  5.$CATALINA_HOME/commons/i18n下的jar文件。  
  6.$CATALINA_HOME/common/lib   下的jar文件。  
  （JDBC驱动之类的jar文件可以放在这里，这样就可以避免在server.xml配置好数据源却出现找不到JDBC   Driver的情况。）  
  7.$CATALINA_HOME/server/classes下的class文件。  
  8.$CATALINA_HOME/server/lib/下的jar文件。  
  9.$CATALINA_BASE/shared/classes   下的class文件。  
  10.$CATALINA_BASE/shared/lib下的jar文件。  
  11.各自具体的webapp   /WEB-INF/classes下的class文件。  
  12.各自具体的webapp   /WEB-INF/lib下的jar文件。

What this means is that leadership involves setting direction, communicating that vision passionately to those they work with, and helping the people they lead understand and commit to that vision. Managers, on the other hand, are responsible for ensuring that the vision is implemented efficiently and successfully.