文件下载预览

最新推荐文章于 2023-05-06 18:57:03 发布

奔跑的猪皮

最新推荐文章于 2023-05-06 18:57:03 发布

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本文链接：https://blog.youkuaiyun.com/qq_30985067/article/details/95479404

博客围绕文件下载与预览展开，但具体内容缺失。通常文件下载预览在信息技术领域应用广泛，涉及前端页面交互、后端文件处理等方面。

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@RequestMapping(value = "/dow.do")
    @ResponseBody
    public void dow(HttpServletRequest request , HttpServletResponse response){

        String file = "E:"+ File.separator+"Oppo+Vendor+Agreement_encrypted_.pdf";

        try {
            // file = URLEncoder.encode(file,"UTF-8");
  /*          File file1 = new File(file);    *//*查找该文件*//*
            InputStream inputStream = new FileInputStream(file1);
            response.setContentType("text/plain");
            response.setHeader("Content-Disposition", "attachment;filename=" + file);
            OutputStream outputStream = null;
            outputStream = response.getOutputStream();
            int i =0;
            byte[] buff=new byte[1024*10];//可以自己 指定缓冲区的大小
            while ((i= inputStream.read(buff))>-1){
                outputStream.write(buff,0,i);
            }

            inputStream.close();
            outputStream.close();*/
            File file1 = new File(file);    /*查找该文件*/
            BufferedInputStream inputStream = new BufferedInputStream(new FileInputStream(file1));
            BufferedOutputStream outputStream = new  BufferedOutputStream(response.getOutputStream());
            //response.setContentType("application/x-msdownload;");
            response.setContentType("application/pdf");/*预览方式*/
           // response.setHeader("Content-Disposition", "attachment;filename=" + new String(file.getBytes("UTF-8"), "ISO-8859-1")); 以下载的方式打开文件，无法预览
            response.setCharacterEncoding("UTF-8");
            byte[] bt = new byte[(int)file1.length()];
            int i = 0;
            while ((i=inputStream.read(bt)) >-1){
                outputStream.write(bt,0,i);
            }
            outputStream.flush();
            inputStream.close();
            outputStream.close();

        }catch (Exception e){
            e.printStackTrace();
        }
    }