hibernate异常（2）

在做hibernate得时候，用Junit4做单元测试，出现了下面这个错误

<span style="font-size:18px;"><span style="color:#ff0000;">com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: Table '</span>at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:57)at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:45)at java.lang.reflect.Constructor.newInstance(Constructor.java:526)at com.mysql.jdbc.Util.handleNewInstance(Util.java:404)at com.mysql.jdbc.Util.getInstance(Util.java:387)at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:939)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3878)at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3814)at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2478)at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2625)at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2551)at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:1861)at com.mysql.jdbc.PreparedStatement.executeQuery(PreparedStatement.java:1962)at org.hibernate.id.enhanced.TableStructure.executeQuery(TableStructure.java:224)at org.hibernate.id.enhanced.TableStructure.access$300(TableStructure.java:46)at org.hibernate.id.enhanced.TableStructure$1$1.execute(TableStructure.java:139)at org.hibernate.id.enhanced.TableStructure$1$1.execute(TableStructure.java:126)at org.hibernate.jdbc.WorkExecutor.executeReturningWork(WorkExecutor.java:55)at org.hibernate.jdbc.AbstractReturningWork.accept(AbstractReturningWork.java:34)at org.hibernate.resource.transaction.backend.jdbc.internal.JdbcIsolationDelegate.delegateWork(JdbcIsolationDelegate.java:56)at org.hibernate.id.enhanced.TableStructure$1.getNextValue(TableStructure.java:125)at org.hibernate.id.enhanced.NoopOptimizer.generate(NoopOptimizer.java:40)at org.hibernate.id.enhanced.SequenceStyleGenerator.generate(SequenceStyleGenerator.java:412)at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:101)at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.saveWithGeneratedOrRequestedId(DefaultSaveOrUpdateEventListener.java:192)at org.hibernate.event.internal.DefaultSaveEventListener.saveWithGeneratedOrRequestedId(DefaultSaveEventListener.java:38)at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.entityIsTransient(DefaultSaveOrUpdateEventListener.java:177)at org.hibernate.event.internal.DefaultSaveEventListener.performSaveOrUpdate(DefaultSaveEventListener.java:32)at org.hibernate.event.internal.DefaultSaveOrUpdateEventListener.onSaveOrUpdate(DefaultSaveOrUpdateEventListener.java:73)at org.hibernate.internal.SessionImpl.fireSave(SessionImpl.java:679)at org.hibernate.internal.SessionImpl.save(SessionImpl.java:671)at org.hibernate.internal.SessionImpl.save(SessionImpl.java:666)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:606)at org.hibernate.context.internal.ThreadLocalSessionContext$TransactionProtectionWrapper.invoke(ThreadLocalSessionContext.java:338)at com.sun.proxy.$Proxy24.save(Unknown Source)at com.eonline.registration.service.UserManager.addUser(UserManager.java:45)at com.eonline.registration.service.UserManagerTest.testAddUser(UserManagerTest.java:29)at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)at java.lang.reflect.Method.invoke(Method.java:606)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:50)at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)23:37:05,188 DEBUG SqlExceptionHelper:122 - error performing isolated work [n/a]</span>

自己上网搜了搜，在stackflow上面看到一个类似的异常，他是在做ssh整合时出现的错误，然后我看了一下解决方案，尝试了一下，只需要在hibernate.cfg.xml中加入下面的一段代码这个错误就可以顺利解决了

<span style="font-size:18px;color:#ff0000;"><property name="hibernate.id.new_generator_mappings">false</property></span>

注：从stackflow上面看到的类似异常的地址：http://stackoverflow.com/questions/32968527/hibernate-sequence-doesnt-exist