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Question

我正在尝试运行带有Hibernate批注的应用程序。 我收到以下异常

Initial SessionFactory creation failed.java.lang.NoClassDefFoundError: net.sf.cglib.core.DebuggingClassWriter$1
Exception in thread "main" java.lang.ExceptionInInitializerError
   at tapes.test.validation.SessionUtil.<clinit>(SessionUtil.java:17)
   at java.lang.Class.initializeClass(libgcj.so.90)
   at tapes.test.validation.LuceneSearch.dbFullIndex(LuceneSearch.java:34)
   at tapes.test.validation.LuceneSearch.main(LuceneSearch.java:143)
Caused by: java.lang.NoClassDefFoundError: net.sf.cglib.core.DebuggingClassWriter$1
   at java.lang.Class.initializeClass(libgcj.so.90)
   at net.sf.cglib.core.DebuggingClassWriter.toByteArray(DebuggingClassWriter.java:73)
   at net.sf.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:26)
   at net.sf.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:216)
   at net.sf.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145)
   at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:117)
   at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:108)
   at net.sf.cglib.core.KeyFactory.create(KeyFactory.java:104)
   at net.sf.cglib.proxy.Enhancer.<clinit>(Enhancer.java:69)
   at java.lang.Class.initializeClass(libgcj.so.90)
   at org.hibernate.proxy.pojo.cglib.CGLIBLazyInitializer.getProxyFactory(CGLIBLazyInitializer.java:117)
   at org.hibernate.proxy.pojo.cglib.CGLIBProxyFactory.postInstantiate(CGLIBProxyFactory.java:43)
   at org.hibernate.tuple.entity.PojoEntityTuplizer.buildProxyFactory(PojoEntityTuplizer.java:162)
   at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:135)
   at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:55)
   at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:56)
   at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:302)
   at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:434)
   at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:109)
   at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:55)
   at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:226)
   at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1300)
   at org.hibernate.cfg.AnnotationConfiguration.buildSessionFactory(AnnotationConfiguration.java:859)
   at tapes.test.validation.SessionUtil.<clinit>(SessionUtil.java:14)
   ...3 more
Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.util.TraceClassVisitor not found in gnu.gcj.runtime.SystemClassLoader{urls=[file:/usr/local/tomcat/webapps/SearchDoctors/Webcontent/WEB-INF/classes/,file:/usr/local/tomcat/webapps/SearchDoctors/WEB-INF/lib/ant-1.6.5.jar,file:/usr/local/tomcat/webapps/SearchDoctors/WEB-INF/lib/ant-antlr-1.6.5.jar,file:/usr/local/tomcat/webapps/SearchDoctors/WEB-INF/lib/ant-junit-1.6.5.jar,file:/usr/local/tomcat/webapps/SearchDoctors/WEB-INF/lib/ant-launcher-.....

这是代码。

public static void  dbFullIndex() throws CorruptIndexException, LockObtainFailedException, IOException{
        try{
            directory = FSDirectory.getDirectory("/home/athreya/luceneindex/docsIndexFile");
            //Index of the User Table--> /home/araghu/aditya/indexFile
            Session session = SessionUtil.getSessionFactory().getCurrentSession();
            if(IndexReader.indexExists(directory)){
                writer = new IndexWriter(directory, new StandardAnalyzer(),true);
                System.out.println("Index exists");
            }
            else{
                writer = new IndexWriter(directory, new StandardAnalyzer(),true);
                System.out.println("Index doesn't Exist");
            }
            session.beginTransaction();
            org.hibernate.Query query = session.createQuery("from Doctors");
            java.util.List docList = query.list();
            session.getTransaction().commit();
            for( int iter=0;iter< docList.size();iter++){
                Doctors docs=(Doctors) docList.get(iter);
                String pkid=docs.getId()+"";
                String indexString= docs.getFirstName()+" "+docs.getMiddleName()+" "+docs.getLastName()+
                " "+docs.getAddress()+" "+docs.getCity()+" "+docs.getHospitalNames()+" "+docs.getSpecialization()+" "
                +docs.getQualification()+" "+docs.getNatProId();
                //String specialString =docs.getSpecialization()+" "+docs.getHospitalNames();
                writer.addDocument(createDoc(indexString,pkid));
                System.out.println("Name ="+ docs.getFirstName());
                //  writer.addDocument(createSpDoc(specialString));
            }
            writer.close();
        }catch(Exception e){
            e.printStackTrace();
        }
    }       

谁能解释这个问题。 我在lib中有cglib jar。 我的java_home设置如下--export JAVA_HOME = / usr / jdk1.6.0_18 /

请帮助我为此困扰了很长时间。

谢谢，Aditya

Answer 1

如果您的WEB-INF / lib中包含该JAR，则可能是错误的版本。 我将打开JAR并确保所涉及的类确实也包含在其中。

您似乎并不依赖CLASSPATH环境变量。 很好，因为Tomcat完全忽略了它。 您的JAR必须位于Web上下文的WEB-INF / lib或服务器的/ lib中，以便Tomcat类加载器找到它们。

Answer 2

 Caused by: java.lang.ClassNotFoundException: org.objectweb.asm.util.TraceClassVisitor 

您需要在运行时类路径中具有ASM 。 运行Web应用程序时，它必须位于/WEB-INF/lib 。 它通常已经包含在您从Hibernate获得的下载包中。 将其复制到运行时类路径。

Answer 3

非常感谢大家！ 问题是Eclipse中的默认版本与JAVA_HOME路径不同。 我想这就是问题所在。 现在很好。 如果还有其他问题，我知道你们在哪里为我服务。 非常感谢。