GWT Download

GWT 下载导入的模板

final FormPanel download = new FormPanel();
    download.setAction(GWT.getHostPageBaseURL() + "download");
    download.setMethod(FormPanel.METHOD_POST);
    Button dl = new Button("Download");
    dl.addClickHandler(new ClickHandler()
    {
      public void onClick(ClickEvent event)
      {
        download.submit();
      }
    });

servlet:

protected void doPost(HttpServletRequest request, HttpServletResponse response)
          throws ServletException, IOException
  {
    System.out.println("file download");

    String fileName = "ProductImportTemplate.xls";
    response.setContentType("application/force-download;charset=UTF-8");
    response.addHeader("Content-Disposition", "attachment;filename=\"" + fileName + "\"");
//    PrintWriter pw = new PrintWriter(response.getOutputStream());
//    pw.write("test.....");
//    pw.flush();
//    pw.close();
    
//    String path = request.getContextPath()+"/downloads/ProductImportTemplate.xls";
//    System.out.println("path: " + path);
//    response.sendRedirect(path);

  }