从 2.6 升级到 3.7 时，BIRT JDBCException“无法加载 JDBC 驱动程序类：com.mysql.jdbc.Driver”

Posted 2023-02-15

【中文标题】从 2.6 升级到 3.7 时，BIRT JDBCException“无法加载 JDBC 驱动程序类：com.mysql.jdbc.Driver”

【英文标题】：BIRT JDBCException "Cannot load JDBC Driver class: com.mysql.jdbc.Driver" while upgrading from 2.6 to 3.7

【发布时间】：2012-03-28 22:44:21

【问题描述】：

我正在尝试在我的 Tomcat 服务器上升级 birt-viewer 的版本，但我似乎在加载 JDBC 驱动程序时出错：

    exception.error ( 1 time(s) )
detail : org.eclipse.birt.report.engine.api.EngineException: An exception occurred during processing. Please see the following message for details:
Cannot open the connection for the driver: org.eclipse.birt.report.data.oda.jdbc.
    org.eclipse.birt.report.data.oda.jdbc.JDBCException: Cannot load JDBC Driver class: com.mysql.jdbc.Driver. (Element ID:1351)
    at org.eclipse.birt.report.engine.executor.ExecutionContext.addException(ExecutionContext.java:1237)
    at org.eclipse.birt.report.engine.executor.ExecutionContext.addException(ExecutionContext.java:1216)
    at org.eclipse.birt.report.engine.executor.QueryItemExecutor.executeQuery(QueryItemExecutor.java:96)
    at org.eclipse.birt.report.engine.executor.TableItemExecutor.execute(TableItemExecutor.java:62)
    at org.eclipse.birt.report.engine.internal.executor.dup.SuppressDuplicateItemExecutor.execute(SuppressDuplicateItemExecutor.java:43)
    at org.eclipse.birt.report.engine.internal.executor.wrap.WrappedReportItemExecutor.execute(WrappedReportItemExecutor.java:46)
    at org.eclipse.birt.report.engine.internal.executor.l18n.LocalizedReportItemExecutor.execute(LocalizedReportItemExecutor.java:34)
    at org.eclipse.birt.report.engine.layout.html.HTMLBlockStackingLM.layoutNodes(HTMLBlockStackingLM.java:65)
    at org.eclipse.birt.report.engine.layout.html.HTMLStackingLM.layoutChildren(HTMLStackingLM.java:26)
    at org.eclipse.birt.report.engine.layout.html.HTMLAbstractLM.layout(HTMLAbstractLM.java:140)
    at org.eclipse.birt.report.engine.layout.html.HTMLInlineStackingLM.resumeLayout(HTMLInlineStackingLM.java:111)
    at org.eclipse.birt.report.engine.layout.html.HTMLInlineStackingLM.layoutNodes(HTMLInlineStackingLM.java:160)
    at org.eclipse.birt.report.engine.layout.html.HTMLStackingLM.layoutChildren(HTMLStackingLM.java:26)
    at org.eclipse.birt.report.engine.layout.html.HTMLAbstractLM.layout(HTMLAbstractLM.java:140)
    at org.eclipse.birt.report.engine.layout.html.HTMLBlockStackingLM.layoutNodes(HTMLBlockStackingLM.java:70)
    at org.eclipse.birt.report.engine.layout.html.HTMLStackingLM.layoutChildren(HTMLStackingLM.java:26)
    at org.eclipse.birt.report.engine.layout.html.HTMLTableLM.layoutChildren(HTMLTableLM.java:132)
    at org.eclipse.birt.report.engine.layout.html.HTMLAbstractLM.layout(HTMLAbstractLM.java:140)
    at org.eclipse.birt.report.engine.layout.html.HTMLBlockStackingLM.layoutNodes(HTMLBlockStackingLM.java:70)
    at org.eclipse.birt.report.engine.layout.html.HTMLPageLM.layout(HTMLPageLM.java:92)
    at org.eclipse.birt.report.engine.layout.html.HTMLReportLayoutEngine.layout(HTMLReportLayoutEngine.java:100)
    at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.doRun(RunAndRenderTask.java:180)
    at org.eclipse.birt.report.engine.api.impl.RunAndRenderTask.run(RunAndRenderTask.java:77)
    at org.eclipse.birt.report.service.ReportEngineService.runAndRenderReport(ReportEngineService.java:929)
    at org.eclipse.birt.report.service.BirtViewerReportService.runAndRenderReport(BirtViewerReportService.java:973)
    at org.eclipse.birt.report.service.actionhandler.BirtRunAndRenderActionHandler.__execute(BirtRunAndRenderActionHandler.java:76)
    at org.eclipse.birt.report.service.actionhandler.AbstractBaseActionHandler.execute(AbstractBaseActionHandler.java:90)
    at org.eclipse.birt.report.presentation.aggregation.layout.EngineFragment.doService(EngineFragment.java:318)
    at org.eclipse.birt.report.presentation.aggregation.AbstractBaseFragment.service(AbstractBaseFragment.java:76)
    at org.eclipse.birt.report.servlet.BirtEngineServlet.__doGet(BirtEngineServlet.java:120)
    at org.eclipse.birt.report.servlet.BaseReportEngineServlet.doGet(BaseReportEngineServlet.java:185)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:617)
    at org.apache.axis.transport.http.AxisServletBase.service(AxisServletBase.java:327)
    at javax.servlet.http.HttpServlet.service(HttpServlet.java:717)
    at org.eclipse.birt.report.servlet.BaseReportEngineServlet.service(BaseReportEngineServlet.java:116)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.eclipse.birt.report.filter.ViewerFilter.doFilter(ViewerFilter.java:68)
    at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
    at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
    at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
    at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
    at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
    at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
    at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
    at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
    at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:859)
    at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
    at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
    at java.lang.Thread.run(Thread.java:662)
Caused by: org.eclipse.birt.report.data.adapter.api.AdapterException: An exception occurred during processing. Please see the following message for details:
Cannot open the connection for the driver: org.eclipse.birt.report.data.oda.jdbc.
    org.eclipse.birt.report.data.oda.jdbc.JDBCException: Cannot load JDBC Driver class: com.mysql.jdbc.Driver.
    at org.eclipse.birt.report.data.adapter.impl.DataRequestSessionImpl.execute(DataRequestSessionImpl.java:644)
    at org.eclipse.birt.report.engine.data.dte.DteDataEngine.doExecuteQuery(DteDataEngine.java:158)
    at org.eclipse.birt.report.engine.data.dte.AbstractDataEngine.execute(AbstractDataEngine.java:267)
    at org.eclipse.birt.report.engine.executor.ExecutionContext.executeQuery(ExecutionContext.java:1939)
    at org.eclipse.birt.report.engine.executor.QueryItemExecutor.executeQuery(QueryItemExecutor.java:80)
    ... 47 more
Caused by: org.eclipse.birt.data.engine.odaconsumer.OdaDataException: Cannot open the connection for the driver: org.eclipse.birt.report.data.oda.jdbc.
    org.eclipse.birt.report.data.oda.jdbc.JDBCException: Cannot load JDBC Driver class: com.mysql.jdbc.Driver.
    at org.eclipse.birt.data.engine.odaconsumer.ExceptionHandler.newException(ExceptionHandler.java:54)
    at org.eclipse.birt.data.engine.odaconsumer.ConnectionManager.openConnection(ConnectionManager.java:177)
    at org.eclipse.birt.data.engine.executor.DataSource.newConnection(DataSource.java:224)
    at org.eclipse.birt.data.engine.executor.DataSource.open(DataSource.java:212)
    at org.eclipse.birt.data.engine.impl.DataSourceRuntime.openOdiDataSource(DataSourceRuntime.java:217)
    at org.eclipse.birt.data.engine.impl.QueryExecutor.openDataSource(QueryExecutor.java:407)
    at org.eclipse.birt.data.engine.impl.QueryExecutor.prepareExecution(QueryExecutor.java:317)
    at org.eclipse.birt.data.engine.impl.PreparedQuery.doPrepare(PreparedQuery.java:455)
    at org.eclipse.birt.data.engine.impl.PreparedDataSourceQuery.produceQueryResults(PreparedDataSourceQuery.java:190)
    at org.eclipse.birt.data.engine.impl.PreparedDataSourceQuery.execute(PreparedDataSourceQuery.java:178)
    at org.eclipse.birt.data.engine.impl.PreparedOdaDSQuery.execute(PreparedOdaDSQuery.java:145)
    at org.eclipse.birt.report.data.adapter.impl.DataRequestSessionImpl.execute(DataRequestSessionImpl.java:624)
    ... 51 more
Caused by: org.eclipse.birt.report.data.oda.jdbc.JDBCException: Cannot load JDBC Driver class: com.mysql.jdbc.Driver.
    at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.findDriver(JDBCDriverManager.java:836)
    at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.loadAndRegisterDriver(JDBCDriverManager.java:941)
    at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.loadAndRegisterDriver(JDBCDriverManager.java:918)
    at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.doConnect(JDBCDriverManager.java:266)
    at org.eclipse.birt.report.data.oda.jdbc.JDBCDriverManager.getConnection(JDBCDriverManager.java:232)
    at org.eclipse.birt.report.data.oda.jdbc.Connection.connectByUrl(Connection.java:243)
    at org.eclipse.birt.report.data.oda.jdbc.Connection.open(Connection.java:162)
    at org.eclipse.datatools.connectivity.oda.consumer.helper.OdaConnection.open(OdaConnection.java:250)
    at org.eclipse.birt.data.engine.odaconsumer.ConnectionManager.openConnection(ConnectionManager.java:165)
    ... 61 more

我的情况有点特殊，因为我不知道我做的是否正确。我自己解释一下。

我有一些使用 BIRT 2.6 设计的报表，还有一些使用 BIRT 3.7 设计的报表。我在 Tomcat 服务器上所做的是创建了两个存储库： - birt-viewer - birt-viewer3.7

我把 MySQL 驱动 (mysql-connector-java-5.0.8-bin.jar) 文件放在 birt-viewer3.7/WEB-INF/lib/ .

但我仍然有错误。我也尝试将其放入 birt-viewer3.7/WEB-INF/platform/plugins/ 但错误仍然相同。

首先：是否可以让两个版本的 birt-viewer 共存？

如果可能的话，我该如何解决这个驱动问题？

谢谢。

【问题讨论】：

这个罐子是我和我的报告设计师一起使用的罐子

【参考方案1】：

您是否在报表设计本身中配置了驱动程序？打开报表设计，双击一个数据源并单击 Manage Drivers... 按钮。

【讨论】：

是的，一切都在那边配置。

【参考方案2】：

将“mysql-connector-java-5.0.8-bin.jar”复制到“WEB-INF\platform\plugins\org.eclipse.birt.report.data.oda.jdbc_INSTALLED_VERSION\drivers”文件夹

【讨论】：

谢谢你，它对我有用。唯一的问题是我必须为报告和我的 Web 应用程序放置两次连接器。有没有办法告诉报表引擎从类路径中选择它？