请教哈，使用tomcat7 启动应用的相关问题?报错

可以试试如下解决方法：

1.调整Tomcat对应类的log级别
修改${tomcat}/conf/log4j.properties
##解除类org.apache.jasper.compiler.TldLocationsCache的log
org.apache.jasper.compiler.TldLocationsCache.level=FINE
 
 2.观察Tomcat日志打印信息
步骤1执行完后，重启Tomcat，观察Tomcat日志，会在日志中发现类似如下打印信息：
九月09,201310:55:37上午org.apache.jasper.compiler.TldLocationsCachetldScanJar
详细:NoTLDfileswerefoundin[file:/E:/devspace/xxt_login/WEB-INF/lib/json-lib-2.3-jdk15.jar].ConsideraddingtheJARtothetomcat.util.scan.DefaultJarScanner.jarsToSkipororg.apache.catalina.startup.TldConfig.jarsToSkippropertyinCATALINA_BASE/conf/catalina.propertiesfile.
九月09,201310:55:37上午org.apache.jasper.compiler.TldLocationsCachetldScanJar
详细:NoTLDfileswerefoundin[file:/E:/devspace/xxt_login/WEB-INF/lib/poi-3.8.jar].ConsideraddingtheJARtothetomcat.util.scan.DefaultJarScanner.jarsToSkipororg.apache.catalina.startup.TldConfig.jarsToSkippropertyinCATALINA_BASE/conf/catalina.propertiesfile.
 
 
3.调整${tomcat}/conf/catalina.properties，将提示的jar添加到不扫描清单中
tomcat.util.scan.DefaultJarScanner.jarsToSkip=<br/>bootstrap.jar,commons-daemon.jar,tomcat-juli.jar,<br/>annotations-api.jar,el-api.jar,jsp-api.jar,servlet-api.jar,<br/>catalina.jar,catalina-ant.jar,catalina-ha.jar,catalina-tribes.jar,<br/>jasper.jar,jasper-el.jar,ecj-.jar,<br/>tomcat-api.jar,tomcat-util.jar,tomcat-coyote.jar,tomcat-dbcp.jar,<br/>tomcat-jni.jar,tomcat-spdy.jar,<br/>tomcat-i18n-en.jar,tomcat-i18n-es.jar,tomcat-i18n-fr.jar,tomcat-i18n-ja.jar,<br/>tomcat-juli-adapters.jar,catalina-jmx-remote.jar,catalina-ws.jar,<br/>tomcat-jdbc.jar,<br/>tools.jar,<br/>commons-beanutils.jar,commons-codec*.jar,commons-collections*.jar,<br/>commons-dbcp*.jar,commons-digester*.jar,commons-fileupload*.jar,<br/>commons-httpclient*.jar,commons-io*.jar,commons-lang*.jar,commons-logging*.jar,<br/>commons-math*.jar,commons-pool*.jar,<br/>jstl.jar,<br/>geronimo-spec-jaxrpc*.jar,wsdl4j*.jar,<br/>ant.jar,ant-junit*.jar,aspectj*.jar,jmx.jar,h2*.jar,hibernate*.jar,httpclient*.jar,<br/>jmx-tools.jar,jta*.jar,log4j*.jar,mail*.jar,slf4j*.jar,<br/>xercesImpl.jar,xmlParserAPIs.jar,xml-apis.jar,<br/>junit.jar,junit-.jar,ant-launcher.jar,<br/>json-lib-.jar,poi-.jar
 
 
【注意】
1.如果使用eclipseserver插件、Sysdeotomcat插件启动Tomcat，此配合可能无效
2.步骤1调整完后，最好清除下以下两个文件夹${tomcat}/conf/Catalina${tomcat}/work/Catalina
3.尽量使用号实现模式匹配，以避免因jar版本升级带来的重复修改代价

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