authcode.jsp

BBS-CS 天乙社区 是采用JSP+JavaBean+Servlet、Struts的MVC框架开发的一套网络虚拟社区系统。文件解压缩后有详细文件说明。

<%@ page contentType="image/jpeg" import="java.awt.*,java.awt.image.*,java.util.*,javax.imageio.*" %>
<%
String authcode = (String)session.getAttribute("authcode");
int width=40, height=20;
BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics g = image.getGraphics();
g.setColor(Color.white);
g.fillRect(0, 0, width, height);
g.setColor(Color.black);
g.drawRect(0,0,width-1,height-1);
String rand = authcode;
g.setColor(Color.black);
g.setFont(new Font("Times New Roman",Font.BOLD,15));
g.drawString(rand,3,15);
Random random = new Random();
for (int i=0;i<40;i++)
{
       int x = random.nextInt(width);
       int y = random.nextInt(height);
       g.drawLine(x,y,x,y);
}
g.dispose();
ImageIO.write(image, "JPEG", response.getOutputStream());
%>