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829天前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() { |
StringBuffer sb = new StringBuffer(); |
BufferedImage image = new BufferedImage(WIDTH, HEIGHT, |
BufferedImage.TYPE_INT_RGB); |
Graphics graphic = image.getGraphics(); |
graphic.setColor(Color.LIGHT_GRAY); |
graphic.fillRect(0, 0, WIDTH, HEIGHT); |
Random ran = new Random(); |
// 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() { |
Random ran = new Random(); |
Color color = new Color(ran.nextInt(156), ran.nextInt(156), |
ran.nextInt(156)); |
return color; |
} |
} |
中级程序员
by: 汉代风云 发表于：2013-07-19 10:18:03 顶(3) | 踩(3) 回复
还不错啊，值得学习学习啊！！
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