tomcat啟動報錯：org.apache.tomcat.util.bcel.classfile.ClassFormatException

今天将項目打包，放到tomcat中允許時，點選啟動，報如下錯誤：

 問題：

Unable to process Jar entry [COM/ibm/db2os390/sqlj/custom/DB2SQLJCustomizer.class] from Jar [jar:file:/D:/tomcat/tomcat7/apache-tomcat-7.0.30-windows-x64/apache-tomcat-7.0.30/webapps/emp/WEB-INF/lib/db2jcc.jar!/] for annotations

org.apache.tomcat.util.bcel.classfile.ClassFormatException: null is not a Java .class file

        at org.apache.tomcat.util.bcel.classfile.ClassParser.readID(ClassParser.java:238)

        at org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:114)

        at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:2101)

        at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1977)

        at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1943)

        at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1928)

        at org.apache.catalina.startup.ContextConfig.webConfig(ContextConfig.java:1322)

        at org.apache.catalina.startup.ContextConfig.configureStart(ContextConfig.java:878)

        at org.apache.catalina.startup.ContextConfig.lifecycleEvent(ContextConfig.java:369)

        at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSupport.java:119)

        at org.apache.catalina.util.LifecycleBase.fireLifecycleEvent(LifecycleBase.java:90)

        at org.apache.catalina.core.StandardContext.startInternal(StandardContext.java:5173)

        at org.apache.catalina.util.LifecycleBase.start(LifecycleBase.java:150)

        at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:901)

        at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:877)

        at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:618)

        at org.apache.catalina.startup.HostConfig.deployDirectory(HostConfig.java:1100)

        at org.apache.catalina.startup.HostConfig$DeployDirectory.run(HostConfig.java:1618)

        at java.util.concurrent.Executors$RunnableAdapter.call(Unknown Source)

        at java.util.concurrent.FutureTask$Sync.innerRun(Unknown Source)

        at java.util.concurrent.FutureTask.run(Unknown Source)

        at java.util.concurrent.ThreadPoolExecutor.runWorker(Unknown Source)

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(Unknown Source)

        at java.lang.Thread.run(Unknown Source)

原因：tomcat沒有對解密包db2jcc.jar進行配置。

解決：打開tomcat目錄/conf/catalina.properties檔案，對其進行編輯，

按檔案的格式将包添加到下圖的位置即可解決問題。

在$TOMCAT_HOME/conf/catalina.properties檔案 的tomcat.util.scan.DefaultJarScanner.jarsToSkip中添加DB2驅動的Jar封包件名如”db2jcc.jar” 即可。

然後重新開機tomcat，錯誤不再出現