org.hibernate.UnknownEntityTypeException: Unable to locate persister: 异常解决-优快云博客

本文链接：https://blog.youkuaiyun.com/qq_27677039/article/details/95387265

博主查看hibernate.hbm.xml文件的mapping时，发现按住ctrl键无法定位resource指向的xml文件。尝试删除、重写mapping，使用class方式均无效，重启myeclipse后问题神奇解决。

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org.hibernate.UnknownEntityTypeException: Unable to locate persister: 异常解决

题主在学习hibernate做测试用例子的时候遇到了一个极其恶心的异常，昨天测试还可以正确运行，今天就不行了，配置文件都没有问题，hibernate.cfg.xml也没有任何问题，题主百度找了大概半个小时的错，几乎崩溃了。

org.hibernate.UnknownEntityTypeException: Unable to locate persister: com.hgh.hibernate.domain.Customer
	at org.hibernate.internal.SessionFactoryImpl.locateEntityPersister(SessionFactoryImpl.java:826)
	at org.hibernate.internal.SessionImpl.locateEntityPersister(SessionImpl.java:2906)
	at org.hibernate.internal.SessionImpl.access$2500(SessionImpl.java:167)
	at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.<init>(SessionImpl.java:2662)
	at org.hibernate.internal.SessionImpl$IdentifierLoadAccessImpl.<init>(SessionImpl.java:2648)
	at org.hibernate.internal.SessionImpl.byId(SessionImpl.java:1105)
	at org.hibernate.internal.SessionImpl.get(SessionImpl.java:978)
	at com.hgh.hibernate.test.HibernateTest.test4(HibernateTest.java:98)
	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.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.runners.ParentRunner.run(ParentRunner.java:363)
	at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:89)
	at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:41)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:541)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:763)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:463)
	at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:209)

    然后我就去看hibernate.hbm.xml文件的mapping，然后发现竟然mapping中的resource定位的xml文件竟然按住ctrl键定位不到了！！！！！！！
    于是乎就觉得肯定是这里的问题，然后删除了所有的mapping，发现和不删除是一样报这个异常，于是乎，我重新写了一遍mapping，并且也试了使用class的方式，但都发现没有任何卵用！！！！！！
    完犊子了，于是乎重启了myeclipse，神奇的事情发生了，竟然好了，好了，好了！！！！！！一脸蒙逼=_=.
心中一万只草泥马飞过！！！！