JFreeChart 设置背景图片

Image image=null;
        HttpServletRequest request = ServletActionContext.getRequest();       
        String url=request.getSession().getServletContext().getRealPath("/page/wrm/analyse/jfreeChart/car.jpg");
  try {
   image = ImageIO.read(new   File(url));
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }      

plot.setBackgroundPaint(null);
        plot.setBackgroundImage(image);

chart.setBackgroundImage(image);

\\ 分类轴网格是否可见

plot.setDomainGridlinesVisible(false);

\\数据轴网格是否可见
  plot.setRangeGridlinesVisible(false);