文件下载

下载模型文件的SpringMVC控制器

最新推荐文章于 2024-10-16 10:38:58 发布

原创最新推荐文章于 2024-10-16 10:38:58 发布 · 283 阅读

0 ·

CC 4.0 BY-SA版权

本文介绍了一个SpringMVC控制器方法，用于根据类型参数下载不同模型的Excel文件。该方法通过设置响应头和输出类型，实现了模型文件的下载功能。

@RequestMapping(value = "/downloadProFile")
public void downloadProFile(String type, HttpServletRequest req, HttpServletResponse resp) throws IOException {
    String filename ="";
    if("1".equals(type)){
        filename = "model-2";
    }else if("2".equals(type)) {
        filename = "model-3-1";
    }else if("3".equals(type)) {
        filename = "model-3-2";
    }else if("4".equals(type)) {
        filename = "model-3-3";
    }else if("5".equals(type)) {
        filename = "model-3-4";
    }else if("6".equals(type)) {
        filename = "model-3-5";
    }
    try{
        resp.reset();// 清空输出流
        String resultFileName = filename + System.currentTimeMillis() + ".xls";
        resultFileName = URLEncoder.encode(resultFileName,"UTF-8");
        req.setCharacterEncoding("utf-8");
        resp.setCharacterEncoding("UTF-8");
        resp.setHeader("Content-disposition", "attachment; filename=" + resultFileName);// 设定输出文件头
        resp.setContentType("application/msexcel");// 定义输出类型
        File outFile=new File(this.downFileDir +"\\"+ filename + ".xlsx");
        if(!outFile.exists()){
            throw new Exception("文件不存在");
        }
        //输入流：本地文件路径
        DataInputStream in = new DataInputStream(
                new FileInputStream(outFile));
        //输出流
        OutputStream out = resp.getOutputStream();
        //输出文件
        int bytes = 0;
        byte[] bufferOut = new byte[1024];
        while ((bytes = in.read(bufferOut)) != -1) {
            out.write(bufferOut, 0, bytes);
        }
        out.close();
        in.close();
    } catch(Exception e){
        e.printStackTrace();
        resp.reset();
    }
}