WebRoot/includes/code.jsp

（完整代码） 1KB 

<%@ page contentType="image/jpeg" 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("Times New Roman",Font.PLAIN,18)); 
	g.setColor(getRandColor(160,200)); 
	for (int i=0;i<200;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); 
	} 
	session.setAttribute("sessioncode",sRand); 
	g.dispose(); 
	ImageIO.write(image, "JPEG", response.getOutputStream()); 
%>

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