<%@ page language="java" import="java.util.*"
import="java.awt.image.*" import="javax.imageio.*" import="java.awt.*"
pageEncoding="gbk"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
<%!
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);
}
%>
<%
//设置页面不缓存
response.setHeader("Pragma","no-cache");
response.setHeader("Cache-Control","no-cache");
response.setDateHeader("Expires",0);
//在内存中创建图片
int width = 60;
int height = 20;
BufferedImage image = new BufferedImage(width,height,BufferedImage.TYPE_INT_RGB);
//创建图片
Graphics g = image.getGraphics();
//生成随机数
Random random = new Random();
//设置图片颜色
g.setColor(getRandColor(200,255));
//设置图片为矩形
g.fillRect(0,0,width,height);
//设置字体
g.setFont(new Font("Times New Roman",Font.PLAIN,18));
//设置干扰条纹
g.setColor(getRandColor(160,200));
for(int i=0;i<255;i++){
int x = random.nextInt(width);
int y = random.nextInt(height);
int x1 = random.nextInt(12);
int y1 = random.nextInt(12);
}
//设置随机数
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(100),20+random.nextInt(100),20+random.nextInt(100)));
g.drawString(rand,13*i+6,16);
}
session.setAttribute("rCode","sRand");
//图片绘制
g.dispose();
ImageIO.write(image,"JPEG",response.getOutputStream());
out.clear();
out = pageContext.pushBody();
%>
</body>
</html>
<%@ page language="java" import="java.util.*" pageEncoding="gbk"%>
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
</head>
<body>
<img src="yanzhengma.jsp"/>
</body>
</html>
