我正在尝试实现一个示例应用程序，其中所有javascript（JS）

我参考了许多文章，但它们对我没有帮助。

对于所有的png文件，我得到以下错误：，

样本误差部分，

Jan 29, 2019 3:25:22 PM com.vaadin.server.communication.PublishedFileHandler handleRequest
WARNING: Rejecting published file request for file that has not been published: css/images/chartIcon.png
Jan 29, 2019 3:25:22 PM com.vaadin.server.communication.PublishedFileHandler handleRequest
WARNING: Rejecting published file request for file that has not been published: css/images/sunburst.png
Jan 29, 2019 3:25:22 PM com.vaadin.server.communication.PublishedFileHandler handleRequest
WARNING: Rejecting published file request for file that has not been published: css/images/treemap.png
Jan 29, 2019 3:25:40 PM com.vaadin.server.communication.PublishedFileHandler handleRequest
WARNING: Rejecting published file request for file that has not been published: css/images/sprite.png

以下是我的文件夹结构，

de.qsoft.manatee.web.vaadin.myapp

de.qsoft.manatee.web.vaadin.myapp.css  --> Contains all CSS files
de.qsoft.manatee.web.vaadin.myapp.fileMenu --> Contains all CSS files
de.qsoft.manatee.web.vaadin.myapp.widgets --> Contains all CSS files

de.qsoft.manatee.web.vaadin.myapp.scripts  --> contains all js files
de.qsoft.manatee.web.vaadin.myapp.widgets  --> contains all js files
de.qsoft.manatee.web.vaadin.myapp.colorpicker  --> contains all js files

SpreadJSWidget.Java

@JavaScript({
   "scripts/jquery-1.11.1.min.js",
   "scripts/jquery-ui-1.10.3.custom.min.js",
   "spreadjs_connector.js",
   "colorpicker/colorPicker.js",
   "fileMenu/fileMenu.js",
   "scripts/actionmanager.js",
   "scripts/app.js",
   "scripts/bootstrap.min.js",
   "scripts/FileSaver.min.js",
   "scripts/gc.spread.excelio.12.0.5.min.js",
   "scripts/gc.spread.sheets.all.12.0.5.min.js",
   "scripts/gc.spread.sheets.barcode.12.0.5.min.js",
   "scripts/gc.spread.sheets.charts.12.0.5.min.js",
   "scripts/gc.spread.sheets.pdf.12.0.5.min.js",
   "scripts/gc.spread.sheets.print.12.0.5.min.js",
   "scripts/gc.spread.sheets.shapes.12.0.5.min.js",
   "scripts/license.js",
   "scripts/resources.js",
   "scripts/ribbon-data.js",
   "scripts/ribbon.js",
   "scripts/sample.js",
   "scripts/spreadActions.js",
   "scripts/util.js",
   "widgets/addChartElement/chartAddChartElement.js",
   "widgets/chartColorPicker/chart-colorPicker.js",
   "widgets/chartLayoutPicker/chartLayoutPicker.js",
   "widgets/richText/richTextEditor.js"
   })


@StyleSheet({
   "colorpicker/colorPicker.css",
   "css/font-awesome/css/font-awesome.min.css",
   "css/bootstrap-theme.min.css",
   "css/bootstrap.min.css",
   "css/borderpicker.css",
   "css/colorpicker.css",
   "css/excel2013.css",
   "css/gc.spread.sheets.12.0.5.css",
   "css/gc.spread.sheets.excel2013white.12.0.5.css",
   "css/insp-slicer-format.css",
   "css/insp-table-format.css",
   "css/inspector.css",
   "css/sample.css",
   "css/shapes.css",
   "fileMenu/fileMenu.css",
   "widgets/addChartElement/chartAddChartElement.css",
   "widgets/chartColorPicker/chart-colorPicker.css",
   "widgets/chartLayoutPicker/chartLayoutPicker.css",
   "widgets/richText/richTextWithRichEditor.css",
   })



public class SpreadJSWidget extends AbstractJavaScriptExtension
{
   /**
    * 
    */
   private static final long serialVersionUID = -804316208810859887L;

   public interface ValueChangeListener extends Serializable {
      void valueChange();
   }

   ArrayList<ValueChangeListener> listeners = new ArrayList<ValueChangeListener>();

   public void addValueChangeListener(ValueChangeListener listener) {
      listeners.add(listener);
   }



   /**
    * 
    */
   public SpreadJSWidget() {
      // TODO hari: Auto-generated constructor stub
   }
   /*'***************************************************************************************
   *   Static/Inner class members                                         
   ******************************************************************************************/

   /*'***************************************************************************************
   *   Class members                                         
   ******************************************************************************************/

   public void setValue(String value) {
      getState().value = value;
   }


   @Override 
   protected void extend(AbstractClientConnector target) {
      // TODO hari: Not Yet Implemented
      super.extend(target);
   }


   public String getValue() {
      return getState().value;
   }

   @Override protected SpreadJSWidgetState getState() {
      return (SpreadJSWidgetState) super.getState();
   }

}

我一步一步地尝试了下面的方法，但是没有得到预期的结果，

>

@Override
protected void init(VaadinRequest vaadinRequest) {

SpreadWidget widget = new SpreadWidget();
setContent(widget);


}

@WebServlet(urlPatterns = "/*", name = "MyUIServlet", asyncSupported = true)
@VaadinServletConfiguration(ui = MyUI.class, productionMode = false)
public static class MyUIServlet extends VaadinServlet {
}