浏览器下载文件功能_网页下载文件功能

浏览器下载文件功能

使用SpringBoot开发一个小功能，可以在其他系统中使用，后台设定一个网址并存储相关文件，浏览器点击网址即可下载文件。

@GetMapping("/downloadFile")
public void downloadFile(HttpServletResponse response) {
    String filePath = "文件路径";
    String fileName = "文件名";
    File file = new File(filePath);
    if(file.exists()) {
        response.setContentType("application/force-download");
        response.addHeader("Content-Disposition", "attachment;fileName=" + fileName);
        byte[] buffer = new byte[1024];
        FileInputStream fis = null;
        OutputStream outputStream = null;
        int len = 0;
        try {
            fis = new FileInputStream(filePath);
            outputStream = response.getOutputStream();
            while((len = fis.read(buffer)) != -1) {
                outputStream.write(buffer, 0, len);
            }
            outputStream.flush();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            try {
                if(outputStream != null) {
                    outputStream.close();
                }
                if(fis != null) {
                    fis.close();
                }
            } catch (IOException e) {
                throw new RuntimeException(e);
            }
        }
    }
}
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