java异常

java.lang.LinkageError: loader constraint violation: when resolving interface method

错误的原因是tomcat/lib下的el-api.jar与项目WEB-INF/lib目录下的el-api.jar冲突。

把项目目录下的el-api.jar删除即可。

 

unable to create a new writer

处理办法：In woindows, delete C:\Documents and Settings\{user name}\liferay\lucene\0\write.lock

 

java.lang.NoClassDefFoundError:net/sf/cglib/proxy/CallbackFilter 

==》missing cglib-2.1_3.jar

java.lang.NoClassDefFoundError:javax/transaction/TransactionManager 

==》missing jta.jar

java.lang.NoClassDefFoundError: freemarker/template/Configuration 

==》missing freemarker.jar

java.lang.NoClassDefFoundError:org/aspectj/weaver/reflect/ReflectionWorld$ReflectionWorldException  ==》missing aspectjrt.jar;aspectjweaver.jar

java.lang.NoClassDefFoundError: org/dom4j/DocumentException 

==》missing dom4j-1.6.1.jar

java.lang.NoClassDefFoundError: org/apache/commons/fileupload/FileUploadException 

==》missing commons-fileupload-1.2.jar

java.lang.NoClassDefFoundError: org/apache/velocity/context/Context 

==》missing velocity-1.4.jar;velocity-dep-1.4.jar;velocity-tools-1.1.jar

 

spring和Jfreechart的冲突问题

==》删除jfreechart中的gnujaxp.jar