Failed to scan JAR [jndi:/localhost/WEB-INF/lib/oracle-jdbc-9.2.0.8.jar]

1. Tomcat 8的报错：

Unmapped Spring configuration files found.

 Failed to scan JAR [jndi:/localhost/WEB-INF/lib/oracle-jdbc-9.2.0.8.jar]

Tomcat 7的报错：

Failed to scan JAR [jndi:/localhost/WEB-INF/lib/oracle-jdbc-9.2.0.8.jar] from WEB-INF/lib
java.util.zip.ZipException: error in opening zip file

Tomcat 6的报错：

ERROR org.hibernate.util.JDBCExceptionReporter (234) - Cannot load JDBC driver class \'oracle.jdbc.driver.OracleDriver\'
15:01:35,182 ERROR org.hibernate.util.JDBCExceptionReporter (234) - Cannot load JDBC driver class \'oracle.jdbc.driver.OracleDriver\'
15:01:35,183 ERROR org.hibernate.tool.hbm2ddl.SchemaUpdate (175) - could not get database metadata
org.apache.commons.dbcp.SQLNestedException: Cannot load JDBC driver class \'oracle.jdbc.driver.OracleDriver\'

2. 用的是Intellij IDEA+Maven+Tomcat部署web项目，结果报这个错。打开External Libraries下的oracle-jdbc-9.2.0.8.jar，发现只有20k，猜测应该是jar包不对，删除了这个，把同事的.m2下面的文件夹考过来就行了。需要注意一点：当Maven Projects有红色浪线时是还没有加载好，需要等等才能启动Tomcat。

3. 上面的错误没有了之后，又出现一个错误：

SEVERE: Exception invoking method manageApp
org.apache.tomcat.util.bcel.classfile.ClassFormatException: Invalid byte tag in constant pool: 15
at org.apache.tomcat.util.bcel.classfile.Constant.readConstant(Constant.java:131)
at org.apache.tomcat.util.bcel.classfile.ConstantPool.(ConstantPool.java:60)
at org.apache.tomcat.util.bcel.classfile.ClassParser.readConstantPool(ClassParser.java:209)
at org.apache.tomcat.util.bcel.classfile.ClassParser.parse(ClassParser.java:119)
at org.apache.catalina.startup.ContextConfig.processAnnotationsStream(ContextConfig.java:1917)
at org.apache.catalina.startup.ContextConfig.processAnnotationsJar(ContextConfig.java:1806)
at org.apache.catalina.startup.ContextConfig.processAnnotationsUrl(ContextConfig.java:1765)
at org.apache.catalina.startup.ContextConfig.processAnnotations(ContextConfig.java:1751)

参照了这篇文章（http://www.mincoder.com/web/1426.shtml）解决了。

{tomcatPath}/conf/web.xml 修改方法:

在最后添加：metadata-complete=\"true\"

应用终于成功启动了。太难得了，搞了两三个小时。