【转】类找不到总结java.lang.ClassNotFoundException

(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： 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