睿虎的博客

@Controller
@RequestMapping("/download")
public class DownloadController {

    @ResponseBody
    @RequestMapping("/download")
    public String fileDownLoad(HttpServletResponse response, @RequestParam("fileName") String fileName){
        String downloadFilePath="D:\\laiscdata";
        File file = new File(downloadFilePath +'\\'+ fileName);
        if(!file.exists()){
            return "下载文件不存在";
        }
        response.reset();
        response.setContentType("application/octet-stream");
        response.setCharacterEncoding("utf-8");
        response.setContentLength((int) file.length());
        response.setHeader("Content-Disposition", "attachment;filename=" + fileName );

        try(BufferedInputStream bis = new BufferedInputStream(new FileInputStream(file));) {
            byte[] buff = new byte[1024];
            OutputStream os  = response.getOutputStream();
            int i = 0;
            while ((i = bis.read(buff)) != -1) {
                os.write(buff, 0, i);
                os.flush();
            }
        } catch (IOException e) {
            System.out.println("程序错误："+e);
            return "下载失败";
        }
        return "下载成功";
    }
}

@Controller
@RequestMapping("/upload")
public class UploadController {

    @ResponseBody
    @RequestMapping("/upload")
    public String httpUpload(@RequestParam("files") MultipartFile files[]){
        String uploadFilePath="D:\\laiscdata";
        JSONObject object=new JSONObject();
        for(int i=0;i<files.length;i++){
            String fileName = files[i].getOriginalFilename();  // 文件名
            File dest = new File(uploadFilePath +'\\'+ fileName);
            if (!dest.getParentFile().exists()) {
                dest.getParentFile().mkdirs();
            }
            try {
                files[i].transferTo(dest);
            } catch (Exception e) {
                System.out.println("程序错误："+e);
                object.put("success",2);
                object.put("result","程序错误，请重新上传");
                return object.toString();
            }
        }
        object.put("success",1);
        object.put("result","文件上传成功");
        return object.toString();
    }

}