下载excel模板

/*
 *  下载客户档案模板
 * @param response
 */
@ApiOperation(value = "下载客户档案模板", notes = "下载客户档案模板")
@PostMapping(value = "/downloadCustomerTemplate")
public void downloadCustomerTemplate(HttpServletResponse response) {
    fis = null;
    try {
        String filePath = "C:/test/customer_excel_imp.xls";
        File file = new File(filePath);
        if (!file.exists()) {
            response.sendError(404, "File not found!");
        } else {
            // 取得文件名。
            String filename = file.getName();
            // 以流的形式下载文件。
            fis = new BufferedInputStream(new FileInputStream(filePath));
            byte[] buffer = new byte[fis.available()];
            // 清空response
            fis.read(buffer);
            // JSONP 解决跨域问题
            response.reset();
            response.addHeader("Access-Control-Allow-Origin", "*");
            response.addHeader("Access-Control-Allow-Methods", "GET, POST, PUT, DELETE");
            response.addHeader("Access-Control-Allow-Headers", "Content-Type");
            // 设置response的Header
            response.setHeader("Content-Disposition", "attachment;filename=" + new String(filename.getBytes(),"iso-8859-1"));
            response.addHeader("Content-Length", "" + file.length());
            OutputStream toClient = new BufferedOutputStream(response.getOutputStream());
            response.setContentType("application/octet-stream");
            toClient.write(buffer);
            toClient.flush();
            toClient.close();
            fis.close();
        }
    } catch (IOException ex) {
        logger.error("异常：",ex.getMessage());
    }
}