数据库迁移工具Kettle连接Mysql数据库报错：Driver class ‘org.gjt.mm.mysql.Driver‘ could not be found, make sure the解决

报错信息：

错误连接数据库 [test] : org.pentaho.di.core.exception.KettleDatabaseException:
Error occurred while trying to connect to the databaseDriver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed.
org.gjt.mm.mysql.Driverorg.pentaho.di.core.exception.KettleDatabaseException:
Error occurred while trying to connect to the databaseDriver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed.
org.gjt.mm.mysql.Driverat org.pentaho.di.core.database.Database.normalConnect(Database.java:472)at org.pentaho.di.core.database.Database.connect(Database.java:370)at org.pentaho.di.core.database.Database.connect(Database.java:341)at org.pentaho.di.core.database.Database.connect(Database.java:331)at org.pentaho.di.core.database.DatabaseFactory.getConnectionTestReport(DatabaseFactory.java:80)at org.pentaho.di.core.database.DatabaseMeta.testConnection(DatabaseMeta.java:2783)at org.pentaho.ui.database.event.DataHandler.testDatabaseConnection(DataHandler.java:597)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.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke(AbstractXulDomContainer.java:313)at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:157)at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:141)at org.pentaho.ui.xul.swt.tags.SwtButton.access$500(SwtButton.java:43)at org.pentaho.ui.xul.swt.tags.SwtButton$4.widgetSelected(SwtButton.java:137)at org.eclipse.swt.widgets.TypedListener.handleEvent(Unknown Source)at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)at org.eclipse.jface.window.Window.runEventLoop(Window.java:820)at org.eclipse.jface.window.Window.open(Window.java:796)at org.pentaho.di.ui.xul.KettleDialog.show(KettleDialog.java:80)at org.pentaho.di.ui.xul.KettleDialog.show(KettleDialog.java:47)at org.pentaho.di.ui.core.database.dialog.XulDatabaseDialog.open(XulDatabaseDialog.java:116)at org.pentaho.di.ui.core.database.dialog.DatabaseDialog.open(DatabaseDialog.java:60)at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.newConnection(SpoonDBDelegate.java:485)at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.newConnection(SpoonDBDelegate.java:472)at org.pentaho.di.ui.spoon.Spoon.newConnection(Spoon.java:8788)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.pentaho.ui.xul.impl.AbstractXulDomContainer.invoke(AbstractXulDomContainer.java:313)at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:157)at org.pentaho.ui.xul.impl.AbstractXulComponent.invoke(AbstractXulComponent.java:141)at org.pentaho.ui.xul.jface.tags.JfaceMenuitem.access$100(JfaceMenuitem.java:43)at org.pentaho.ui.xul.jface.tags.JfaceMenuitem$1.run(JfaceMenuitem.java:106)at org.eclipse.jface.action.Action.runWithEvent(Action.java:498)at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:545)at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:490)at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:402)at org.eclipse.swt.widgets.EventTable.sendEvent(Unknown Source)at org.eclipse.swt.widgets.Display.sendEvent(Unknown Source)at org.eclipse.swt.widgets.Widget.sendEvent(Unknown Source)at org.eclipse.swt.widgets.Display.runDeferredEvents(Unknown Source)at org.eclipse.swt.widgets.Display.readAndDispatch(Unknown Source)at org.pentaho.di.ui.spoon.Spoon.readAndDispatch(Spoon.java:1366)at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:8022)at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9277)at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:692)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.pentaho.commons.launcher.Launcher.main(Launcher.java:92)
Caused by: org.pentaho.di.core.exception.KettleDatabaseException:
Driver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed.
org.gjt.mm.mysql.Driverat org.pentaho.di.core.database.Database.connectUsingClass(Database.java:515)at org.pentaho.di.core.database.Database.normalConnect(Database.java:456)... 57 more
Caused by: java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driverat java.net.URLClassLoader.findClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)at java.lang.ClassLoader.loadClass(Unknown Source)at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:490)... 58 more主机名       : 192.168.43.253
端口           : 3306
数据库名:test

1.下载连接驱动包（根据Mysql版本下载）：

Java 连接 MySQL 需要驱动包，MySQL驱动包官网下载地址：
https://dev.mysql.com/downloads/connector/j/

2.解压Java连接Mysql 8.0驱动包

解压后取出mysql-connector-java.jar包（这里驱动包有版本号）。放到kettle的lib目录下面。

3.重启Kettle并测试连接

可以看到现在已经连接数据库成功了！

↓↓↓↓↓↓

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