Spring MVC：要下载的大文件，OutOfMemoryException

这是因为您正在将整个文件读取到内存中，所以请使用缓冲的读写操作。

@RequestMapping(value = "/file/{dummyparam}.pdf", method = RequestMethod.GET, produces=MediaType.APPLICATION_OCTET_STREAM_VALUE)public void getFile(@PathVariable("dummyparam") String dummyparam, HttpServletResponse response) {    InputStream is = new FileInputStream(resultFile);    response.setHeader("Content-Disposition", "attachment; filename="dummyname " + dummyparam + ".pdf"");    int read=0;    byte[] bytes = new byte[BYTES_DOWNLOAD];    OutputStream os = response.getOutputStream();    while((read = is.read(bytes))!= -1){        os.write(bytes, 0, read);    }    os.flush();    os.close(); }