java下载服务器上的文件

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/**
     * @param response 响应
     * @Description: 文件下载
     */
    @RequestMapping(value = "/downFile")
    public void downFile(HttpServletResponse response,HttpServletRequest request) {
        OutputStream out = null;
        FileInputStream fis = null;
        //文件路径
        String filePath= request.getParameter("filePath");
        //文件名
        String fileName= request.getParameter("fileName");
        try {
            out = response.getOutputStream();
            // 设置response的Header 防止文件名乱码
            response.addHeader("Content-Disposition",
                    "attachment;filename="
                            + new String((fileName).getBytes("utf-8"), "ISO-8859-1"));
            response.setContentType("application/octet-stream");
            fis = new FileInputStream(filePath);
            int b;
            while ((b = fis.read()) != -1) {
                out.write(b);
            }
            out.flush();
        } catch (IOException e) {
            e.printStackTrace();
            logger.error("执行 文件下载downFile 方法失败：" + e.getMessage());
        } finally {
            try {
                if (out != null) {
                    out.close();
                }
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                try {
                    if (fis != null) {
                        fis.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
        }
    }

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