kettle 连接数据库报错（错误连接数据库 [mysql] : org.pentaho.di.core.exception.KettleDatabaseException: Error occ）

我就是我 2023-01-17 12:58 90阅读 0赞

### 文章目录 ###

*   *  问题描述
     *  问题分析
     *  问题解决
     *  测试连接

## 问题描述 ##

说的是没有发现org.gjt.mm.mysql.Driver驱动，故而我们下载自己mysql对应的版本。

错误连接数据库 [mysql] : 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:477)
    	at org.pentaho.di.core.database.Database.connect(Database.java:373)
    	at org.pentaho.di.core.database.Database.connect(Database.java:344)
    	at org.pentaho.di.core.database.Database.connect(Database.java:334)
    	at org.pentaho.di.core.database.DatabaseFactory.getConnectionTestReport(DatabaseFactory.java:83)
    	at org.pentaho.di.core.database.DatabaseFactory.getConnectionTestResults(DatabaseFactory.java:112)
    	at org.pentaho.di.core.database.DatabaseMeta.testConnectionSuccess(DatabaseMeta.java:2843)
    	at org.pentaho.ui.database.event.DataHandler.testDatabaseConnection(DataHandler.java:621)
    	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:498)
    	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:61)
    	at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.newConnection(SpoonDBDelegate.java:495)
    	at org.pentaho.di.ui.spoon.delegates.SpoonDBDelegate.newConnection(SpoonDBDelegate.java:482)
    	at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:3096)
    	at org.pentaho.di.ui.spoon.Spoon.doubleClickedInTree(Spoon.java:3066)
    	at org.pentaho.di.ui.spoon.Spoon.access$1700(Spoon.java:372)
    	at org.pentaho.di.ui.spoon.Spoon$26.widgetDefaultSelected(Spoon.java:6205)
    	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:1381)
    	at org.pentaho.di.ui.spoon.Spoon.waitForDispose(Spoon.java:7816)
    	at org.pentaho.di.ui.spoon.Spoon.start(Spoon.java:9178)
    	at org.pentaho.di.ui.spoon.Spoon.main(Spoon.java:707)
    	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:498)
    	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:520)
    	at org.pentaho.di.core.database.Database.normalConnect(Database.java:461)
    	... 49 more
    Caused by: java.lang.ClassNotFoundException: org.gjt.mm.mysql.Driver
    	at java.net.URLClassLoader.findClass(URLClassLoader.java:382)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:418)
    	at java.lang.ClassLoader.loadClass(ClassLoader.java:351)
    	at org.pentaho.di.core.database.Database.connectUsingClass(Database.java:495)
    	... 50 more
    
    主机名       : localhost
    端口           : 3306
    数据库名:test

## 问题分析 ##

分析上面报错原因：是org.gjt.mm.mysql路径下没有找到Driver.class,所以下载的jar包一定要包含这个路径下的Driver.class文件

所以原因有两种：

1 是你没有下载mysql 的jdbc驱动jar包

2 你下载的驱动包下不存在org.gjt.mm.mysql路径下的Driver.class文件

## 问题解决 ##

所以不光是下载jar包， 还要看jar包下是否包含有org.gjt.mm.mysql该路径下的 Driver.class文件  
![在这里插入图片描述][20210429161531370.png]  
把解压的这俩个jar包放到kettle …/lib下面

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjc0MzYw_size_16_color_FFFFFF_t_70]

路径：`D:\kettle\data-integration\lib`  
![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjc0MzYw_size_16_color_FFFFFF_t_70 1]

## 测试连接 ##

1.选择一般模式  
2.自己设置自己的连接名字，最好符合数据名设置  
3.连接的名字或者ip  
4.填写自己的数据库，这里的数据库在mysql里面必须用不然会报错  
5.3306端口默认  
6.用户信息  
7.测试连接  
8.成功

![在这里插入图片描述][watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjc0MzYw_size_16_color_FFFFFF_t_70 2]

[20210429161531370.png]: /images/20221021/8377a5a394b849429ba363c7d6aec2bd.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjc0MzYw_size_16_color_FFFFFF_t_70]: /images/20221021/a2a60db2a5c44976b18ae1490311da85.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjc0MzYw_size_16_color_FFFFFF_t_70 1]: /images/20221021/93cf075d59d944109707c36b1b3a3de8.png
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3FxXzQzNjc0MzYw_size_16_color_FFFFFF_t_70 2]: /images/20221021/860c2b72762c4b9daf1205a631cf851e.png