报错信息
org.hibernate.exception.SQLGrammarException: Cannot open connection at org.hibernate.exception.SQLStateConverter.convert(SQLStateConverter.java92）
报错原因
在数据库中没有对应的配置文件的数据库名称
解决方法
创建或者修改正确的数据库名称即可
报错信息
Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer]
1 java.lang.ExceptionInInitializerError 2 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 3 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 4 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 5 at java.lang.reflect.Constructor.newInstance(Constructor.java:423) 6 at org.junit.runners.BlockJUnit4ClassRunner.createTest(BlockJUnit4ClassRunner.java:217) 7 at org.junit.runners.BlockJUnit4ClassRunner$1.runReflectiveCall(BlockJUnit4ClassRunner.java:266) 8 at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) 9 at org.junit.runners.BlockJUnit4ClassRunner.methodBlock(BlockJUnit4ClassRunner.java:263) 10 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78) 11 at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57) 12 at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290) 13 at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71) 14 at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) 15 at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58) 16 at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268) 17 at org.junit.runners.ParentRunner.run(ParentRunner.java:363) 18 at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:86) 19 at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38) 20 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:459) 21 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:678) 22 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:382) 23 at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:192) 24 Caused by: org.hibernate.HibernateException: Unable to instantiate default tuplizer [org.hibernate.tuple.entity.PojoEntityTuplizer] 25 at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:110) 26 at org.hibernate.tuple.entity.EntityTuplizerFactory.constructDefaultTuplizer(EntityTuplizerFactory.java:135) 27 at org.hibernate.tuple.entity.EntityEntityModeToTuplizerMapping.<init>(EntityEntityModeToTuplizerMapping.java:80) 28 at org.hibernate.tuple.entity.EntityMetamodel.<init>(EntityMetamodel.java:323) 29 at org.hibernate.persister.entity.AbstractEntityPersister.<init>(AbstractEntityPersister.java:475) 30 at org.hibernate.persister.entity.SingleTableEntityPersister.<init>(SingleTableEntityPersister.java:133) 31 at org.hibernate.persister.PersisterFactory.createClassPersister(PersisterFactory.java:84) 32 at org.hibernate.impl.SessionFactoryImpl.<init>(SessionFactoryImpl.java:297) 33 at org.hibernate.cfg.Configuration.buildSessionFactory(Configuration.java:1385) 34 at com.mikey.util.HibernateUtil.<clinit>(HibernateUtil.java:11) 35 ... 22 more 36 Caused by: java.lang.reflect.InvocationTargetException 37 at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method) 38 at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:62) 39 at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45) 40 at java.lang.reflect.Constructor.newInstance(Constructor.java:423) 41 at org.hibernate.tuple.entity.EntityTuplizerFactory.constructTuplizer(EntityTuplizerFactory.java:107) 42 ... 31 more 43 Caused by: org.hibernate.PropertyNotFoundException: Could not find a getter for students in class com.mikey.bean.Classs 44 at org.hibernate.property.BasicPropertyAccessor.createGetter(BasicPropertyAccessor.java:328) 45 at org.hibernate.property.BasicPropertyAccessor.getGetter(BasicPropertyAccessor.java:321) 46 at org.hibernate.mapping.Property.getGetter(Property.java:304) 47 at org.hibernate.tuple.entity.PojoEntityTuplizer.buildPropertyGetter(PojoEntityTuplizer.java:299) 48 at org.hibernate.tuple.entity.AbstractEntityTuplizer.<init>(AbstractEntityTuplizer.java:158) 49 at org.hibernate.tuple.entity.PojoEntityTuplizer.<init>(PojoEntityTuplizer.java:77) 50 ... 36 more
报错原因
在映射文件和持久化类的配置不正确，请检查修改配置参数
解决方法
检查持久化类的映射文件配置参数