image.jsp

自己写的一个struts+spring+hibernate测试程序

<%@ page import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*"%><%!Color getRandColor(int fc, int bc) {//??????????
		Random random = new Random();
		if (fc > 255)
			fc = 255;
		if (bc > 255)
			bc = 255;
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}
	%><%
			out.clear();
			response.setHeader("Pragma", "No-cache");
			response.setHeader("Cache-Control", "no-cache");
			response.setDateHeader("Expires", 0);
			int width = 60, height = 20;
			BufferedImage image = new BufferedImage(width, height,
					BufferedImage.TYPE_INT_RGB);
			Graphics g = image.getGraphics();
			Random random = new Random();
			g.setColor(getRandColor(200, 250));
			g.fillRect(0, 0, width, height);
			g.setFont(new Font("TimesNewRomanWT", Font.PLAIN, 18));
			g.setColor(getRandColor(160, 200));
			for (int i = 0; i < 155; i++) {
				int x = random.nextInt(width);
				int y = random.nextInt(height);
				int xl = random.nextInt(12);
				int yl = random.nextInt(12);
				g.drawLine(x, y, x + xl, y + yl);
			}
			String sRand = "";
			for (int i = 0; i < 4; i++) {
				String rand = String.valueOf(random.nextInt(10));
				sRand += rand;
				g.setColor(new Color(20 + random.nextInt(110), 20 + random
						.nextInt(110), 20 + random.nextInt(110)));
				g.drawString(rand, 13 * i + 6, 16);
			}
			request.getSession(true).setAttribute("rand", sRand);
			System.out.println(session.getAttribute("rand")+">>>>>>>>>>>>>>>>>>>>>>>>>>>");
			g.dispose();
			response.reset();
			response.setContentType("image/jpeg");
			
			ImageIO.write(image, "JPEG", response.getOutputStream());%>