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我試圖從SELECT
createQuery
這樣的:轉換查詢到TypeQuery給java.lang.AbstractMethodError異常
Query query3 = em.createQuery("SELECT t FROM Tag t WHERE t.name IN (:tag1, :tag2)");
query3.setParameter("tag1", "tag1");
query3.setParameter("tag2", "tag2");
Set<Tag> tags = new HashSet<Tag>(query3.getResultList());
此代碼工作正常,但我得到了這樣的警告:
類型安全:類型List的表達式需要進行未經檢查的轉換以符合列表
因此,根據this answer,我replce Query
與TypedQuery
這樣的:
TypedQuery<Tag> query2 = em.createQuery("SELECT t FROM Tag t WHERE t.name IN (:tag1, :tag2)", Tag.class);
query2.setParameter("tag1", "tag1");
query2.setParameter("tag2", "tag2");
Set<Tag> tags = new HashSet<Tag>(query2.getResultList());
警告消失,但是當我運行它,它會產生一個運行時錯誤是這樣的:
java.lang.AbstractMethodError: org.apache.openejb.persistence.JtaEntityManager.createQuery(Ljava/lang/String;Ljava/lang/Class;)Ljavax/persistence/TypedQuery;
at ut.ConfTest.testCreatePost(ConfTest.java:269)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27)
at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
at org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86)
at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:675)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382)
at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192)
我想不通我的代碼出了什麼問題。我用TypedQuery搞砸了什麼?
因此,某些事情(OpenEJB)正在使用與您期望的不同版本的JPA。看看各個版本的OpenEJB,你的JPA提供者,JPA API jar等 –
@NeilStockton我正在使用** openejb-3.1.4 **和** EclipseLink 2.6 **,它似乎使用** javax。 persistence_2.1.1 **根據jar文件名。我認爲TypedQuery在JPA 2.x中可用。 – Nier
eclipselink使用JPA 2.1,是的。 OpenEJB嗎?因爲它是OpenEJB,異常抱怨沒有實現JPA 2方法,並且基於該錯誤消息的強烈建議是NO,它不是,它是針對JPA 1構建的! –