数据库迁移工具Kettle连接Mysql数据库报错：Driver

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 [test1] : org.pentaho.di.core.exception.KettleDatabaseException: 
Error occurred while trying to connect to the database

Driver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed.
org.gjt.mm.mysql.Driver


org.pentaho.di.core.exception.KettleDatabaseException: 
Error occurred while trying to connect to the database

Driver class 'org.gjt.mm.mysql.Driver' could not be found, make sure the 'MySQL' driver (jar file) is installed.
org.gjt.mm.mysql.Driver


    at 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.di.ui.core.database.dialog.DatabaseDialog.test(DatabaseDialog.java:110)
    at org.pentaho.di.ui.core.database.wizard.CreateDatabaseWizardPage2.test(CreateDatabaseWizardPage2.java:157)
    at org.pentaho.di.ui.core.database.wizard.CreateDatabaseWizardPage2$3.widgetSelected(CreateDatabaseWizardPage2.java:147)
    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.core.database.wizard.CreateDatabaseWizard.createAndRunDatabaseWizard(CreateDatabaseWizard.java:131)
    at org.pentaho.di.ui.trans.step.BaseStepDialog$3.widgetSelected(BaseStepDialog.java:709)
    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.pentaho.di.ui.trans.steps.tableinput.TableInputDialog.open(TableInputDialog.java:436)
    at org.pentaho.di.ui.spoon.delegates.SpoonStepsDelegate.editStep(SpoonStepsDelegate.java:127)
    at org.pentaho.di.ui.spoon.Spoon.editStep(Spoon.java:8766)
    at org.pentaho.di.ui.spoon.trans.TransGraph.editStep(TransGraph.java:3217)
    at org.pentaho.di.ui.spoon.trans.TransGraph.mouseDoubleClick(TransGraph.java:783)
    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.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(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:497)
    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.Driver

    at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:515)
    at org.pentaho.di.core.database.Database.normalConnect(Database.java:456)
    ... 44 more
Caused by: java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver
    at java.net.URLClassLoader.findClass(URLClassLoader.java:381)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
    at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
    at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:490)
    ... 45 more

主机名       : 127.0.0.1
端口           : 3306
数据库名:heroes

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

要根据自己的数据库版本来下载

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

4.还是失败

5.下载

6.替换

7.重启Kettle并测试连接成功