嚴重的: >>org.zkoss.poi.POIXMLException: java.lang.reflect.InvocationTargetException
>>java.lang.reflect.InvocationTargetException: null
>>org.apache.xmlbeans.XmlException: error: Unexpected element: XML_DOC_OR_TEXT_DECL
>>org.xml.sax.SAXParseException: Unexpected element: XML_DOC_OR_TEXT_DECL
>>	at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.reportFatalError(Piccolo.java:1038)
>>	at org.apache.xmlbeans.impl.piccolo.xml.Piccolo.parse(Piccolo.java:723)
>>	at org.apache.xmlbeans.impl.store.Locale$SaxLoader.load(Locale.java:3439)
>>	at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1270)
>>	at org.apache.xmlbeans.impl.store.Locale.parseToXmlObject(Locale.java:1257)
>>	at org.apache.xmlbeans.impl.schema.SchemaTypeLoaderBase.parse(SchemaTypeLoaderBase.java:345)
>>	at org.openxmlformats.schemas.drawingml.x2006.spreadsheetDrawing.WsDrDocument$Factory.parse(Unknown Source)
>>	at org.zkoss.poi.xssf.usermodel.XSSFDrawing.<init>(XSSFDrawing.java:92)
>>	at sun.reflect.NativeConstructorAccessorImpl.newInstance0(Native Method)
>>	at sun.reflect.NativeConstructorAccessorImpl.newInstance(NativeConstructorAccessorImpl.java:39)
>>	at sun.reflect.DelegatingConstructorAccessorImpl.newInstance(DelegatingConstructorAccessorImpl.java:27)
>>	at java.lang.reflect.Constructor.newInstance(Constructor.java:513)
>>	at org.zkoss.poi.xssf.usermodel.XSSFFactory.createDocumentPart(XSSFFactory.java:60)
>>	at org.zkoss.poi.POIXMLDocumentPart.read(POIXMLDocumentPart.java:403)
>>	at org.zkoss.poi.POIXMLDocumentPart.read(POIXMLDocumentPart.java:408)
>>	at org.zkoss.poi.POIXMLDocument.load(POIXMLDocument.java:155)
>>	at org.zkoss.poi.xssf.usermodel.XSSFWorkbook.<init>(XSSFWorkbook.java:271)
>>	at org.zkoss.zss.model.sys.impl.XSSFBookImpl.<init>(XSSFBookImpl.java:101)
>>	at org.zkoss.zss.model.sys.impl.ExcelImporter.importsFromStream(ExcelImporter.java:117)
>>	at org.zkoss.zss.model.sys.impl.ExcelImporter.imports(ExcelImporter.java:78)
>>	at org.zkoss.zss.api.impl.ImporterImpl.imports(ImporterImpl.java:21)
>>	at zss.testapp.ExportComposer.export2Destination(ExportComposer.java:175)
>>	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
>>	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
>>	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
>>	at java.lang.reflect.Method.invoke(Method.java:597)
>>	at org.zkoss.zk.ui.select.Selectors$ComposerEventListener.onEvent(Selectors.java:681)

public class ExportComposer extends SelectorComposer<Component> {

	private static final long serialVersionUID = 1L;
	
	Exporter excelExporter = Exporters.getExporter("excel");
	@Wire("#source")
	private Spreadsheet srcSpreadsheet;
	@Wire("#destination")
	private Spreadsheet dstSpreadsheet;

	@Listen("onClick = #inputPicture")
	public void inputChartPicture() throws IOException{
		Sheet sheet = srcSpreadsheet.getSelectedSheet();
		
		
		SheetOperationUtil.addPicture(range(sheet,3, 8 ), 
				new AImage(ExportComposer.class.getResource("zklogo.png")).getByteData(),
				Format.PNG, 100, 100);

		
	}

	@Listen("onClick = #exportImport")
	public void export2Destination() throws IOException{
		File exportedFile = new File("exported.xlsx");
		FileOutputStream fos = new FileOutputStream(exportedFile);
		excelExporter.export(srcSpreadsheet.getBook(), fos);
		fos.flush();
		fos.close();


		//import
		Importer importer = Importers.getImporter("excel");
		Book book = importer
				.imports(new FileInputStream(exportedFile), "exported");
		dstSpreadsheet.setBook(book);

		exportedFile.delete();
	}
}

<zk>
	<window apply="zss.testapp.ExportComposer" height="100%">
		<button id="inputPicture" label="Input Pictures and Charts"/>
		
		<separator></separator>
		<button id="exportImport" label="Export to destination Spreadsheet"/>
		
		<spreadsheet id="source" src="/export.xlsx" maxrows="150" maxcolumns="40"
			width="100%" height="50%" showContextMenu="true" showSheetbar="true" showToolbar="true"
			ctrlKeys="^c^x^v^d^s^o^b^i^u#del^#del^z^y^e" />
		<spreadsheet id="destination" maxrows="150" maxcolumns="40"
			width="100%" height="40%" showContextMenu="true" showSheetbar="true" showToolbar="true"
			ctrlKeys="^c^x^v^d^s^o^b^i^u#del^#del^z^y^e" />
	</window>
</zk>