Go语言视频零基础入门到精通

javalearner

<%@ page contentType="image/jpeg" import="java.awt.*,java.awt.image.*,
       com.sun.image.codec.jpeg.*,java.util.*"  %>

<%

//创建图像
int width=200, height=200;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);

// 获取绘图环境的上下文
Graphics g = image.getGraphics();

// 填充背景
g.setColor(Color.white);
g.fillRect(0, 0, width, height);

// 创建一个随机的多边形
Polygon poly = new Polygon();
Random random = new Random();
for (int i=0; i < 5; i++) {
poly.addPoint(random.nextInt(width),  
random.nextInt(height));
}

// 填充多边形
g.setColor(Color.blue);
g.fillPolygon(poly);

// Dispose context
g.dispose();

// Send back image
ServletOutputStream sos = response.getOutputStream();
JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(sos);
//创建JPEGImage图像编码器
encoder.encode(image);

%>   

源码下载：http://file.javaxxz.com/2014/10/1/025530375.zip