正在阅读:JSP技巧:发送动态图像JSP技巧:发送动态图像

2004-02-14 09:33 出处:PConline 作者:佚名 责任编辑:huangpeidan
 

  <%@ 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  (代码实验室)
  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);
  %> (代码实验室)

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