private void jButton7ActionPerformed(java.awt.event.ActionEvent evt) {
		String s = mail.getExtraFilename();
		String filename = s.substring(0, s.indexOf("\n\n"));
		s = s.substring(s.indexOf("\n\n") + 2);

		File download = new File("user/"+user.getUsername()+"/"+filename);
		try {
			BASE64Decoder decoder = new BASE64Decoder();
			FileOutputStream fw = new FileOutputStream(download);
			fw.write(decoder.decodeBuffer(s));
			fw.flush();
			fw.close();
			download.createNewFile();
			JOptionPane.showConfirmDialog(null, "ʼسɹص"
					+ download.getAbsolutePath(), "ɹ", JOptionPane.OK_OPTION);
		} catch (IOException e) {
			JOptionPane.showConfirmDialog(null, "ʼʧ", "",
					JOptionPane.OK_OPTION);
			e.printStackTrace();
		}
	}