Eclipse的伯特ClassNotFoundException的

Question

我創建了一個事件處理程序腳本一起在數據集伯特（4.4.0）：

public class ActionsPerDateDataSet extends ScriptedDataSetEventAdapter {  

    @Override 
    public boolean fetch(IDataSetInstance dataSet, IUpdatableDataSetRow row) throws ScriptException { 
    } 

    @Override 
    public void open(IDataSetInstance dataSet) { 
    } 
} 

我用下面的代碼生成報告：

public File actionPdf() throws EngineException, IOException { 
    IReportEngine engine = getEngine(); 

    IReportRunnable design = engine.openReportDesign("c:\\...\\scripted.rptdesign"); 

    IRunAndRenderTask task = engine.createRunAndRenderTask(design); 

    //  Set parent classloader for engine 
    task.getAppContext().put(EngineConstants.APPCONTEXT_CLASSLOADER_KEY, ReportingService.class.getClassLoader());  

    File f = new File(System.nanoTime() + "res.pdf"); 
    final IRenderOption options = new RenderOption(); 
    options.setOutputFormat("pdf");  
    OutputStream os = new FileOutputStream(f); 
    options.setOutputStream(os); 
    task.setRenderOption(options); 
    task.run(); 
    task.close(); 
    os.close(); 
    return f; 
} 

然而伯特可以」找不到類：

Caused by: java.lang.ClassNotFoundException: com.foo.aip.ejb.reporting.action.ActionsPerDateDataSet 
    at org.eclipse.birt.core.framework.URLClassLoader.findClass1(URLClassLoader.java:188) 
    at org.eclipse.birt.core.framework.URLClassLoader$1.run(URLClassLoader.java:156) 
    at org.eclipse.birt.core.framework.URLClassLoader$1.run(URLClassLoader.java:1) 
    at java.security.AccessController.doPrivileged(Native Method) 
    at org.eclipse.birt.core.framework.URLClassLoader.findClass(URLClassLoader.java:151) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:425) 
    at java.lang.ClassLoader.loadClass(ClassLoader.java:358) 
    at org.eclipse.birt.report.engine.executor.ApplicationClassLoader.loadClass(ApplicationClassLoader.java:79) 
    at org.eclipse.birt.report.engine.executor.EventHandlerManager.loadClass(EventHandlerManager.java:99) 
    ... 85 more 

我出出主意:( 你對我有什麼提示

Answer 1

的類加載器應設置在發動機初始化，使用類型的對象org.eclipse.birt.report.engine.api.EngineConfig

EngineConfig config = new EngineConfig(); 
config.getAppContext().put(EngineConstants.APPCONTEXT_CLASSLOADER_KEY,ReportingService.class.getClassLoader()); 

當然這將工作僅在「ReportingService」類與「ActionsPerDateDataSet」處於相同的類加載器中，但不提供有關該類的信息。如果不是這種情況，可以使用

config.setProperty(EngineConstants.WEBAPP_CLASSPATH_KEY,"c:/your-jar-location/actionperdataset.jar;c:/your-class-location");