Spring mvc 文件下载

 

@Controller
public class DownloadController {

    @RequestMapping("download.htm")
    public void downloadFile(String fileName,HttpServletResponse response){
        response.setCharacterEncoding("utf-8");
        response.setContentType("multipart/form-data");

        response.setHeader("Content-Disposition", "attachment;fileName="+fileName);
        try {
            File file=new File(fileName);
            System.out.println(file.getAbsolutePath());
            InputStream inputStream=new FileInputStream("file/"+file);
            OutputStream os=response.getOutputStream();
            byte[] b=new byte[1024];
            int length;
            while((length=inputStream.read(b))>0){
                os.write(b,0,length);
            }
            inputStream.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}