image.jsp

来自「J2EE独立开发制作」· JSP 代码 · 共 27 行

<%@ page contentType="image/jpeg" import="java.awt.*,java.awt.image.*,com.sun.image.codec.jpeg.*,java.util.*"%> 　　　
<%
//Create image
int width=200, height=200;
BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
// Get drawing context
Graphics g = image.getGraphics();
// Fill background
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
// Create random polygon
Polygon poly = new Polygon();
Random random = new Random();
for (int i=0;i<5;i++)
{
poly.addPoint(random.nextInt(width),random.nextInt(height));
}
// Fill polygon
g.setColor(Color.cyan);
g.fillPolygon(poly);
// Dispose context
g.dispose();
// Send back image
ServletOutputStream sos=response.getOutputStream();
JPEGImageEncoder encoder=JPEGCodec.createJPEGEncoder(sos);
encoder.encode(image);
%>