JSP实现的画图

<%@ page language="java" contentType="image/jpeg;charset=GB2312"%>
<%@page  import="java.util.*,java.awt.*"%>
<%@page   import="java.awt.image.*,com.sun.image.codec.jpeg.*"%>
<%
 int width=600,height=500;
 BufferedImage image=new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
 Graphics g=image.getGraphics();
 g.setColor(new Color(236,233,216));
 g.fillRect(0,0,width,height);
 g.setColor(Color.white);
 g.fillRect(11,35,width-21,height-47);
 g.setColor(Color.black);
 g.drawRect(10,34,width-20,height-46);
 g.dispose();
 ServletOutputStream sos=response.getOutputStream();
 JPEGImageEncoder encoder=JPEGCodec.createJPEGEncoder(sos);
 encoder.encode(image);
%>