图形验证

来源：互联网发布：电钢琴教学软件编辑：程序博客网时间：2024/04/30 19:49

今天在书上看来一个好玩的代码，记录下来

<%@ page language="java" contentType="image/png; charset=UTF-8"
    pageEncoding="UTF-8"%>
<%@page import="java.awt.image.*"%>
<%@page import="javax.imageio.*"%>
<%@page import="java.io.*"%>
<%@page import="java.awt.*"%>

<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<title>Insert title here</title>
</head>
<body>

   <%
   BufferedImage image=new BufferedImage(340,160,BufferedImage.TYPE_INT_RGB);
   Graphics g=image.getGraphics();
   g.fillRect(0,0,400,400);    //g是画笔

   g.setColor(new Color(255,0,0));
   g.fillArc(20,20,100,100,30,120);   //画弧度

   g.setColor(new Color(0,255,0));
   g.fillArc(20,20,100,100,150,120);

   g.setColor(new Color(0,0,255));
   g.fillArc(20,20,100,100,270,120);

   g.setColor(new Color(0,0,0));

    g.setFont(new Font("Arial Black",Font.PLAIN,16));

   g.drawString("red:climb",200,60);
   g.drawString("green:swim",200,100);
   g.drawString("blue:jump",200,140);
   g.dispose();


   ImageIO.write(image,"png",response.getOutputStream());   //输出图片
%>


</body>
</html>

详细图片验证

http://blog.csdn.net/zhulin40/article/details/51899487

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