BIRT导出Excel: BIRT Excel Output

//RunAndRender Task
  IReportRunnable design = null;
  design = engine.openReportDesign("Reports/myreport.rptdesign"); 
  IRunAndRenderTask task = engine.createRunAndRenderTask(design);   
  EXCELRenderOption options = new EXCELRenderOption(); 
  options.setOutputFormat("xls");
  options.setOutputFileName("output/resample/myxls.xls");
  task.setRenderOption(options);
  task.run();
  task.close();

                //or Render Task
  IReportDocument document = null;
  document = engine.openReportDocument("output/resample/myreport.rptdocument"); 
  EXCELRenderOption options = new EXCELRenderOption();
  options.setOutputFormat("xls");
  options.setOutputFileName("output/resample/xlsoutput.xls");
  IRenderTask task = engine.createRenderTask(document);   
  task.setRenderOption(options);
  task.render();