java 文件下载出错 java.lang.OutOfMemoryError: ?400报错

java 文件下载出错 java.lang.OutOfMemoryError: Java heap space? 400 报错

文件比较大 100M，有没有大哥帮忙分析下

	public static void download(String path, HttpServletResponse response) throws Exception {
		try {
			File file = new File(path);
			if (file.exists()) {
				String filename = file.getName();
				response.reset();
				response.setHeader("Content-Disposition","attachment;filename=" + new String(filename.getBytes(), "iso-8859-1"));
				response.setContentType("application/octet-stream");
				response.setHeader("Content-Length", "" + file.length());
				InputStream is = new BufferedInputStream(new FileInputStream(file));
				OutputStream os = new BufferedOutputStream(response.getOutputStream());
				byte[] buffer = new byte[1024 * 10];
				int len = -1;
				while ((len = is.read(buffer)) != -1) {
					os.write(buffer, 0, len);
				}
				os.flush();
				os.close();
				is.close();
			}
		} catch (IOException e) {
			e.printStackTrace();
		}
	}