@RequestMapping("/downloadxls.action")    public void downloadxls(HttpServletRequest request, HttpServletResponse response) {        //获取请求参数        Map
     
       params = ParamsUtil.getParams(request);        String contextPath = request.getSession().getServletContext().getRealPath(File.separator + "report");        String excelName = xxxxx;        String excelFullName = contextPath + File.separator + excelName + ".xls";        InputStream inStream = null, fileInStream = null;        ServletOutputStream outStream = null;        int byteRead;        try {            fileInStream = new FileInputStream(excelFullName);            inStream = new BufferedInputStream(fileInStream);            response.reset();            response.setContentType("APPLICATION/OCTET-STREAM");            response.setHeader("Content-disposition", "attachment; filename=" + excelName + ".xls");            outStream = response.getOutputStream();            byte[] buffer = new byte[1024];            while ((byteRead = inStream.read(buffer)) != -1) {                outStream.write(buffer, 0, byteRead);            }            response.flushBuffer();            outStream.close();            inStream.close();            fileInStream.close();        } catch (Exception e) {            LOGGER.error( e);        }finally{            try {                if(outStream!=null){                    outStream.close();                }            } catch (IOException e2) {                LOGGER.error(e2);            }            try {                if(inStream!=null){                    inStream.close();                }            } catch (IOException e2) {                LOGGER.error(e2);            }            try {                if(fileInStream!=null){                    fileInStream.close();                }            } catch (IOException e2) {                LOGGER.error(e2);            }        }    }