jsp - jsp 2是否需要标准jar

Question

我有一个使用 jsp 2 的 Java EE Web 项目。我的 Web 应用程序中有标准的 1.1.2.jar 和 jsp 2。在tomcat 6.0.35 中没问题。但在 tomcat 7 中，它在 catalina 日志中显示了一些消息

org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jstl/core_rt is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jstl/core is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/core is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jstl/fmt_rt is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jstl/fmt is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/fmt is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/functions is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://jakarta.apache.org/taglibs/standard/permittedTaglibs is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://jakarta.apache.org/taglibs/standard/scriptfree is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jstl/sql_rt is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jstl/sql is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/sql is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jstl/xml_rt is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jstl/xml is already defined 
Jul 26, 2012 10:56:45 AM org.apache.catalina.startup.TaglibUriRule body 
INFO: TLD skipped. URI: http://java.sun.com/jsp/jstl/xml is already defined

我的猜测是 jsp 2 包含了标准标签的特性。因此，我可能不需要为 jsp2 应用程序包含标准 jar。这是正确的还是如果这是错误的，那么为什么会出现此消息？