securityImage

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Random;

import javax.imageio.ImageIO;

public class SecurityImage {

public static void getImage(String filename) throws IOException{
int width=60,height=20;
//	    String filedir="C:/"+filename+".jpg";
char mapTable[] =
{ 'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i',
'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', '8',
'9' };
String filedir="C:\\Users\\hz04307\\"+filename+".jgp";
BufferedImage bi=new BufferedImage(width, height, BufferedImage.TYPE_INT_ARGB);
Graphics g=bi.getGraphics();
g.setColor(new Color(0xDCDCDC));
g.fillRect(0, 0, width, height);
g.setColor(Color.blue);
g.drawRect(0, 0, width-1, height-1);
String str="";
for(int i=0;i<4;i++){
str+=mapTable[(int) (mapTable.length*Math.random())];
}
g.setColor(Color.black);
g.setFont(new Font("Atlantic Inline",Font.PLAIN,18));
String s=str.substring(0,1);
g.drawString(s, 8, 17);
s=str.substring(1, 2);
g.drawString(s,20,15);
s=str.substring(2, 3);
g.drawString(s, 30, 18);
s=str.substring(3, 4);
g.drawString(s, 45, 15);
Random rand=new Random();
for(int i=0;i<200;i++){
int x=rand.nextInt();
int y=rand.nextInt();
g.setColor(Color.white );
g.setFont(new Font("Monospaced",Font.BOLD,36));
g.drawOval(x, y, 1, 1);
g.drawLine(x, y, x*width, y*height);
}

g.dispose();
ImageIO.write(bi, "JPG", new File(filedir));
}
public static void main(String[] args) throws IOException {
// TODO Auto-generated method stub
SecurityImage.getImage("a");

}

}