package com.tarena.util;
import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.util.HashMap;
import java.util.Map;
import java.util.Random;
//验证码
public final class ImageUtil {
private static final String[] chars
= { "0",
"1",
"2",
"3",
"4",
"5",
"6",
"7", "8", "9", "A", "B", "C", "D", "E", "F", "G", "H", "J", "K",
"L", "M", "N", "P" };
private static final int SIZE = 5;// 字符长度
private static final int LINES = 7;// 干扰线
private static final int WIDTH = 100;
private static final int HEIGHT = 50;
private static final int FONT_SIZE = 30;// 字体大小
public static Map
<String, BufferedImage
> createImage
() {
graphic.
setColor(Color.
LIGHT_GRAY);
graphic.fillRect(0, 0, WIDTH, HEIGHT);
// 画随机字符
for (int i = 1; i <= SIZE; i++) {
int r = ran.nextInt(chars.length);
graphic.setColor(getRandomColor());
graphic.
setFont(new Font(null,
Font.
BOLD + Font.
ITALIC, FONT_SIZE
));
graphic.drawString(chars[r], (i - 1) * WIDTH / SIZE, HEIGHT / 2);
sb.append(chars[r]);// 将字符保存,存入Session
}
// 画干扰线
for (int i = 1; i <= LINES; i++) {
graphic.setColor(getRandomColor());
graphic.drawLine(ran.nextInt(WIDTH), ran.nextInt(HEIGHT),
ran.nextInt(WIDTH), ran.nextInt(HEIGHT));
}
Map
<String, BufferedImage
> map
= new HashMap
<String, BufferedImage
>();
map.put(sb.toString(), image);
return map;
}
public static Color getRandomColor
() {
Color color
= new Color(ran.
nextInt(156), ran.
nextInt(156),
ran.nextInt(156));
return color;
}
}