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Hibernate Error – 初期のSessionFactory作成が失敗しました.java.lang.NoClassDefFoundError:org/apache/commons/collections/SequencedHashMap

一般的なHibernateのエラーです。これは、依存ライブラリが欠落していることが原因です – Apache Common Collection。

Initial SessionFactory creation failed.java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
Exception in thread "main" java.lang.ExceptionInInitializerError
    at com.mkyong.persistence.HibernateUtil.buildSessionFactory(HibernateUtil.java:18)
    at com.mkyong.persistence.HibernateUtil.<clinit>(HibernateUtil.java:8)
    at com.mkyong.common.App.main(App.java:17)
Caused by: java.lang.NoClassDefFoundError: org/apache/commons/collections/SequencedHashMap
    at org.hibernate.mapping.Table.<init>(Table.java:33)
    at org.hibernate.cfg.Mappings.addTable(Mappings.java:165)
    at org.hibernate.cfg.HbmBinder.bindRootPersistentClassCommonValues(HbmBinder.java:290)
    at org.hibernate.cfg.HbmBinder.bindRootClass(HbmBinder.java:273)
    at org.hibernate.cfg.HbmBinder.bindRoot(HbmBinder.java:144)
    at org.hibernate.cfg.Configuration.add(Configuration.java:669)
    at org.hibernate.cfg.Configuration.addInputStream(Configuration.java:504)
    at org.hibernate.cfg.Configuration.addResource(Configuration.java:566)
    at org.hibernate.cfg.Configuration.parseMappingElement(Configuration.java:1587)
    at org.hibernate.cfg.Configuration.parseSessionFactory(Configuration.java:1555)
    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1534)
    at org.hibernate.cfg.Configuration.doConfigure(Configuration.java:1508)
    at org.hibernate.cfg.Configuration.configure(Configuration.java:1428)
    at org.hibernate.cfg.Configuration.configure(Configuration.java:1414)
    at com.mkyong.persistence.HibernateUtil.buildSessionFactory(HibernateUtil.java:13)
    ... 2 more
Caused by: java.lang.ClassNotFoundException: org.apache.commons.collections.SequencedHashMap
    at java.net.URLClassLoader$1.run(URLClassLoader.java:200)
    at java.security.AccessController.doPrivileged(Native Method)
    at java.net.URLClassLoader.findClass(URLClassLoader.java:188)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:307)
    at sun.misc.Launcher$AppClassLoader.loadClass(Launcher.java:301)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:252)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:320)
    ... 17 more

解決策

ライブラリはhttp://commons.apache.org/collections/からダウンロードできます。

または

Mavenのpom.xmlに依存関係を追加する

      <dependency>
        <groupId>commons-collections</groupId>
        <artifactId>commons-collections</artifactId>
        <version>3.2.1</version>
      </dependency>
モバイルバージョンを終了