JPA 异常 ： java.lang.NoSuchFieldError: NONE

java.lang.NoSuchFieldError: NONEI am getting this run time exception when I am running my hello world program using JPA .The code is as mentioned below --// Second unit of workEntityManager newEm = emf.createEntityManager();EntityTransaction newTx = newEm.getTransaction();newTx.begin(); //Exception is thrown at this point List messages =newEm.createQuery("select m from Message m order by m.text asc").getResultList();for (Object m : messages) {Message loadedMsg = (Message) m;System.out.println(loadedMsg.getText());}newTx.commit();newEm.close();}catch(Exception e){e.printStackTrace();}// Shutting down the applicationemf.close();}The jars which I am using are mentioned below --1)ejb3-persistence-1.0.2.GA2)hibernate33)hibernate-entitymanager-3.5.1-Final4)hibernate-jpa-2.0-api-1.0.0.Final5)hibernate-validator-4.0.2.GADatabase which I am using is hsqldbI will be very much obliged for the solution of the same , I feel that it is related to versions of the jars but not sure which one to use.

 

 

以上内容摘自网络：

 

 List<User> ls = em.createNativeQuery("select * from users").getResultList();

 

在执行到如上代码的时候抛出一个异常：

 

java.lang.NoSuchFieldError: NONE

原因是 jar包重复了，  原来我既导入了 JavaEE 5 又单独导入了 java-persistence-api 

 

删除 JavaEE5 问题解决