pring-flex生成pdf文件

flex中可以生成spring的action的URL，spring而后截获该请求，其对应的requestMap如下：
1）由NativeWebRequest request中获取HttpServletResponse
2）由HttpServletResponse获取OutputStream，这个与普通的Servlet就完全相同了。

3）由PDF模板（见前一篇）或者Java直接生成PDF的Document对象都可以作为PDF的内容

@RequestMapping(params = "action=expor。。。")
    public void exportSearchedAb(ResourceRequest req,ResourceResponse rsp,NativeWebRequest request) throws Exception {

。。。。。。。。。。
            HttpServletResponse response = request
                    .getNativeResponse(HttpServletResponse.class);
            response.setCharacterEncoding("utf-8");
            response.setContentType("application/x-download");
            response.setHeader("Content-Disposition","attachment;filename="abstracts.pdf"");
            OutputStream os = response.getOutputStream();

        Document doc = new Document(PageSize.A4);
        PdfWriter writer = PdfWriter.getInstance(doc,os);
        doc.open();
      
      
        // add content to document
        PdfContentByte cb = writer.getDirectContent();
      
         Paragraph title = new Paragraph();
        title.add(getPhrase("AUTHOR INDEX",size,isBold,isItalic,fontName));
        title.setAlignment(Element.ALIGN_CENTER);
        title.setSpacingBefore(15f);
        title.setSpacingAfter(15f);
        doc.add(title)
     
        doc.close();
        // convert pdf doc to png
        org.icepdf.core.pobjects.Document document = new org.icepdf.core.pobjects.Document();
        DocumentUtils.closeDocument(document);
        os.flush();
        os.close();
}