Junit4测试testSaveStudents()方法时报错，检查了实体类的对象关系映射没有错，为什么？

org.hibernate.exception.GenericJDBCException: could not execute statement

at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:54)

at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:125)

at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:110)

at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:136)

at org.hibernate.engine.jdbc.batch.internal.NonBatchingBatch.addToBatch(NonBatchingBatch.java:58)

at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3067)

at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3509)

at org.hibernate.action.internal.EntityInsertAction.execute(EntityInsertAction.java:88)

at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:377)

at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:369)

at org.hibernate.engine.spi.ActionQueue.executeActions(ActionQueue.java:286)

at org.hibernate.event.internal.AbstractFlushingEventListener.performExecutions(AbstractFlushingEventListener.java:339)

at org.hibernate.event.internal.DefaultFlushEventListener.onFlush(DefaultFlushEventListener.java:52)

at org.hibernate.internal.SessionImpl.flush(SessionImpl.java:1234)

at org.hibernate.internal.SessionImpl.managedFlush(SessionImpl.java:404)

at org.hibernate.engine.transaction.internal.jdbc.JdbcTransaction.beforeTransactionCommit(JdbcTransaction.java:101)

at org.hibernate.engine.transaction.spi.AbstractTransactionImpl.commit(AbstractTransactionImpl.java:175)

at entity.TestStudents.testSaveStudents(TestStudents.java:62)

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:45)

at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)

at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:42)

at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:20)

at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:263)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:68)

at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:47)

at org.junit.runners.ParentRunner$3.run(ParentRunner.java:231)

at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:60)

at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:229)

at org.junit.runners.ParentRunner.access$000(ParentRunner.java:50)

at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:222)

at org.junit.runners.ParentRunner.run(ParentRunner.java:300)

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)

Caused by: java.sql.SQLException: Incorrect string value: '\xE5\xBC\xA0\xE4\xB8\x89' for column 'sname' at row 1

at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1078)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4187)

at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:4119)

at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2570)

at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2731)

at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2815)

at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2155)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2458)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2375)

at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2359)

at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:133)

... 37 more