struts action 文件下载

Question

public ActionForward Download(ActionMapping mapping, ActionForm form, 
        HttpServletRequest request, HttpServletResponse response) throws Exception {
            response.setContentType("APPLICATION/vnd.ms-excel");            ............................//这部分是生成excel文件,文件能正常生成            String filename = sFileName;
            filename = URLEncoder.encode(filename, "GBK");            response.setHeader("Content-Disposition", "attachment;filename=\""
                    + filename + "\"");
            try {
                OutputStream os = response.getOutputStream();
                FileInputStream fis = new FileInputStream(sCurrPath);
                BufferedInputStream bis = new BufferedInputStream(fis);
                BufferedOutputStream bos = new BufferedOutputStream(os);                int r = 0;
                byte[] ba = new byte[4096];
                while ((r = bis.read(ba)) != -1) {
                    bos.write(ba, 0, r);
                    bos.flush();
                }
                bos.close();
                bis.close();
                fis.close();
            } catch (Exception e) {
                log.debug("OutputStream exception");
            }            iFile = new File(sCurrPath);
            if (iFile.exists()) {
                iFile.delete();
            } else {
                log.debug("File not Exsits");
            }            logger.debug("Down Excel OK ");
            return null;
}文件正常生成,但是下载不下来,也根本就没有提示保存框出来.

Answer 1

Down Excel OK 
所有log信息也都能正常输出 

Answer 2

应该是路径的问题sCurrPath这个filename还有这个 多检查下，应该出在这里

Answer 3

            String path="D:\rpt\a.doc";
            File file=new File(path);
            if(file.exists()){
            String fileName=file.getName();
            InputStream is=new FileInputStream(file);
            OutputStream os=response.getOutputStream();
            BufferedInputStream bis = new BufferedInputStream(is);
            BufferedOutputStream bos = new BufferedOutputStream(os);
            
            fileName = java.net.URLEncoder.encode(fileName, "UTF-8");// 处理中文文件名的问题
              fileName = new String(fileName.getBytes("UTF-8"), "GBK");// 处理中文文件名的问题
              response.reset();
            response.setCharacterEncoding("UTF-8");
            response.setContentType("application/x-msdownload");// 不同类型的文件对应不同的MIME类型
            
            response.setHeader("Content-Disposition", "attachment; filename="+fileName);
            int bytesRead = 0;
            byte[] buffer = new byte[1024];
            while ((bytesRead = bis.read(buffer)) != -1){
                bos.write(buffer, 0, bytesRead);// 将文件发送到客户端
            }
            bos.flush();
            bis.close();
            bos.close();
            is.close();
            os.close();
         }
       
        return null;

Answer 4

我原来是用ajax实现 的,改成直接用action提交就没有问题