转载 http://blog.csdn.net/xinghui_liu/article/details/7287662
(1)org.apache.tomcat.dbcp.dbcp.SQLNestedException: Cannot load JDBC driver class
'com.microsoft.sqlserver.jdbc.SQLServerDriver'
答：sqljdbc.jar
(2)java.lang.ClassNotFoundException: org.springframework.ejb.config.JeeNamespaceHandler
答：spring-remoting.jar
(3)java.lang.ClassNotFoundException: org.springframework.scripting.config.LangNamespaceHandler
答：spring-support.jar
(4)java.lang.ClassNotFoundException: org.springframework.transaction.config.TxNamespaceHandler
答：spring-dao.jar
(5)java.lang.ClassNotFoundException: org.springframework.aop.config.AopNamespaceHandler
答：spring-aop.jar
(6)java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
答：commons-collections-2.1.1.jar
（7）java.lang.ClassNotFoundException：org.springframework.scripting.config.LangNamespaceHandler
答：添加spring-support.jar包，具体路径为：MyEclipse 6.0myeclipseeclipsepluginscom.genuitec.eclipse.springframework_6.0.1.zmyeclipse601200710data2.0distmodules
(8)java.lang.NoClassDefFoundError: org/apache/commons/logging/LogFactory
答：commons-logging.jar
(9)java.lang.NoClassDefFoundError: org/aopalliance/intercept/MethodInterceptor
答：aopalliance.jar包
(10)java.lang.NoClassDefFoundError:org/springframework/remoting/support/RemoteInvocationTraceInterceptor
答：org.springframework.context-3.0.5.RELEASE.jar 包
（11）java.lang.NoClassDefFoundError: org/aopalliance/aop/Advice
答：com.springsource.org.aopalliance-1.0.0.jar包
（12） 使用spring 调试提示：Failed to load or instantiate TagLibraryValidator class: org.apache.taglibs.standard.tlv.JstlCoreTLV
答：原因是：缺少.jar文件
至于是缺少standard.jar还是servlet-api.jar还是两个都缺那就看你引了哪个了。
(13) java.lang.NoSuchMethodError: com.microsoft.util.UtilByteOrderedDataWriter.writeInt32(I)V
sqlserver2000的三个jar包出问题了，注意版本对应，看tomcat的log日志，一切问题就好解决了
（14）java.lang.NoClassDefFoundError:org/aspectj/weaver/reflect/ReflectionWorld$ReflectionWorldException
缺少的两个jar包：aspectjrt.jar;aspectjweaver.jar ，这是springAOP所依赖的包