$CATALINA_HOME/bin/commons-logging-api.jar - Jakarta commons logging API.
$CATALINA_HOME/bin/commons-daemon.jar - Jakarta commons daemon API.
jmx.jar - The JMX 1.2 实现.
Common - 这个类加载器可以使一些附加的类对于Tomcat内部的类和web应用程序可见。正常情况下,应用程序不应该替换它。所有$CATALINA_HOME/common/classes目录下的未打包类和资源,以及$CATALINA_HOME/commons/endorsed、$CATALINA_HOME/commons/i18n、$CATALINA_HOME/common/lib目录下的Jar包中的类和资源都是这个类加载器的加载对象。默认情况,包括如下内容:
commons-el.jar - Jakarta commons el, Jasper用的EL表达式实现
jasper-compiler.jar - The JSP 2.0 编译器.
jasper-compiler-jdt.jar - The Eclipse JDT Java 编译器.
naming-factory-dbcp.jar - Jakarta commons DBCP, 为Web应用程序提供JDBC连接池。这个类已经从默认的org.apache.commons包中移出。
naming-java.jar - java命名空间处理器.
naming-resources.jar - The specialized JNDI naming context implementation used to represent the static resources of a web application. This is not related to the support of the J2EE ENC, and cannot be removed.
servlet-api.jar - The Servlet 2.4 API.
tomcat-i18n-**.jar - Optional JARs containing resource bundles for other languages. As default bundles are also included in each individual JAR, they can be safely removed if no internationalization of messages is needed.