Hibernate配置檔案中配置MySQL編碼問題
阿新 • • 發佈：2019-02-18
個人小菜鳥一枚,在使用Hibernate配置MySQL資料庫時,發現又出現中文亂碼問題.於是乎不管三七二十一,在jdbc的url路徑後面新增上
?useUnicode=true&characterEncoding=utf-8; 但是Hibernate卻報錯.我就改變utf-8的大小寫,還是不行,最終在網路上尋找到需要寫成UTF8格式.於是乎便修改了.
再次測試可以了,原以為這樣就可以了.但是資料庫中的表刪除之後,用Hibernate配置建立的表再次插入資料就會報錯,提示:
原因是cust_name的值不正確,我懷疑是url後面的編碼問題,於是去掉了指定編碼,程式可以正常執行,但是插入資料庫的依然是亂碼,後來我在網上尋找Hibernate配置MySQL中文亂碼問題的時候,發現一個問題只要是別人寫的部落格,不管正確與否轉載過來就用,不驗證一下是否正確,結果搜到的答案基本一致,在xml裡面配置指定的編碼格式,.有兩種方式的.org.hibernate.exception.GenericJDBCException: could not execute statement at org.hibernate.exception.internal.StandardSQLExceptionConverter.convert(StandardSQLExceptionConverter.java:47) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:109) at org.hibernate.engine.jdbc.spi.SqlExceptionHelper.convert(SqlExceptionHelper.java:95) at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:207) at org.hibernate.dialect.identity.GetGeneratedKeysDelegate.executeAndExtract(GetGeneratedKeysDelegate.java:57) at org.hibernate.id.insert.AbstractReturningDelegate.performInsert(AbstractReturningDelegate.java:42) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:2792) at org.hibernate.persister.entity.AbstractEntityPersister.insert(AbstractEntityPersister.java:3363) at org.hibernate.action.internal.EntityIdentityInsertAction.execute(EntityIdentityInsertAction.java:81) at org.hibernate.engine.spi.ActionQueue.execute(ActionQueue.java:597) at org.hibernate.engine.spi.ActionQueue.addResolvedEntityInsertAction(ActionQueue.java:232) at org.hibernate.engine.spi.ActionQueue.addInsertAction(ActionQueue.java:213) at org.hibernate.engine.spi.ActionQueue.addAction(ActionQueue.java:256) at org.hibernate.event.internal.AbstractSaveEventListener.addInsertAction(AbstractSaveEventListener.java:317) at org.hibernate.event.internal.AbstractSaveEventListener.performSaveOrReplicate(AbstractSaveEventListener.java:272) at org.hibernate.event.internal.AbstractSaveEventListener.performSave(AbstractSaveEventListener.java:178) at org.hibernate.event.internal.AbstractSaveEventListener.saveWithGeneratedId(AbstractSaveEventListener.java:109) 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 com.csf.test.Demo1.testSave2(Demo1.java:60) at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25) at java.lang.reflect.Method.invoke(Method.java:597) at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:47) at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12) at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:44) at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17) at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:271) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:70) at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50) at org.junit.runners.ParentRunner$3.run(ParentRunner.java:238) at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:63) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:236) at org.junit.runners.ParentRunner.access$000(ParentRunner.java:53) at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:229) at org.junit.runners.ParentRunner.run(ParentRunner.java:309) 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) Caused by: java.sql.SQLException: Incorrect string value: '\xE7\xBE\x8E\xE7\xBE\x8E' for column 'cust_name' at row 1 at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1073) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3609) at com.mysql.jdbc.MysqlIO.checkErrorPacket(MysqlIO.java:3541) at com.mysql.jdbc.MysqlIO.sendCommand(MysqlIO.java:2002) at com.mysql.jdbc.MysqlIO.sqlQueryDirect(MysqlIO.java:2163) at com.mysql.jdbc.ConnectionImpl.execSQL(ConnectionImpl.java:2624) at com.mysql.jdbc.PreparedStatement.executeInternal(PreparedStatement.java:2127) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2427) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2345) at com.mysql.jdbc.PreparedStatement.executeUpdate(PreparedStatement.java:2330) at org.hibernate.engine.jdbc.internal.ResultSetReturnImpl.executeUpdate(ResultSetReturnImpl.java:204) ... 45 more
第一種是傳統的配置方式,在url後面新增?useUnicode=true&characterEncoding=utf-8; 第二種方式是
<propertyname="connectio.useUnicode">true
<propertyname="connection.characterEncoding">utf-8</property>
第一種方式我也是這麼寫的,就不過多贅述,第二種方式我在文件裡面沒找到Hibernate提到過.測試也沒成功,可能是我哪裡配置檔案不對把.
後來找到一個不一樣的帖子我看了一下,文章的博主說主鍵的欄位太長也會報錯.我發現我這個主鍵是用的Long型,在配置檔案裡面設定length指定了欄位長度之後,再次測試通過.滿心感激這位博主解惑.
希望在轉載別人部落格的時候加上自己的測試結果,方便了以後方便別人的尋找答案. 清一色的一個內容的帖子真的沒什麼意思.如果內容是對了還好.