package util;import java.awt.Color;import java.awt.Font;import java.awt.Graphics;import java.awt.image.BufferedImage;import java.io.FileOutputStream;import java.io.IOException;import java.io.OutputStream;import java.util.Random;import javax.imageio.ImageIO;public final class ImageUtil {		// 验证码字符集	private static final char[] chars = { 		‘0‘, ‘1‘, ‘2‘, ‘3‘, ‘4‘, ‘5‘, ‘6‘, ‘7‘, ‘8‘, ‘9‘, 		‘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‘};	// 字符数量	private static final int SIZE = 4;	// 干扰线数量	private static final int LINES = 5;	// 宽度	private static final int WIDTH = 80;	// 高度	private static final int HEIGHT = 40;	// 字体大小	private static final int FONT_SIZE = 30;	/**	 * 生成随机验证码及图片	 */	public static Object[] createImage() {		StringBuffer sb = new StringBuffer();		// 1.创建空白图片		BufferedImage image = new BufferedImage(			WIDTH, HEIGHT, BufferedImage.TYPE_INT_RGB);		// 2.获取图片画笔		Graphics graphic = image.getGraphics();		// 3.设置画笔颜色		graphic.setColor(Color.LIGHT_GRAY);		// 4.绘制矩形背景		graphic.fillRect(0, 0, WIDTH, HEIGHT);		// 5.画随机字符		Random ran = new Random();		for (int i = 0; i <SIZE; i++) {			// 取随机字符索引			int n = ran.nextInt(chars.length);			// 设置随机颜色			graphic.setColor(getRandomColor());			// 设置字体大小			graphic.setFont(new Font(				null, Font.BOLD + Font.ITALIC, FONT_SIZE));			// 画字符			graphic.drawString(				chars[n] + "", i * WIDTH / SIZE, HEIGHT / 2);			// 记录字符			sb.append(chars[n]);		}		// 6.画干扰线		for (int i = 0; i < LINES; i++) {			// 设置随机颜色			graphic.setColor(getRandomColor());			// 随机画线			graphic.drawLine(ran.nextInt(WIDTH), ran.nextInt(HEIGHT),					ran.nextInt(WIDTH), ran.nextInt(HEIGHT));		}		// 7.返回验证码和图片		return new Object[]{sb.toString(), image};	}	/**	 * 随机取色	 */	public static Color getRandomColor() {		Random ran = new Random();		Color color = new Color(ran.nextInt(256), 				ran.nextInt(256), ran.nextInt(256));		return color;	}		public static void main(String[] args) throws IOException {		Object[] objs = createImage();		BufferedImage image = (BufferedImage) objs[1];		OutputStream os = new FileOutputStream("d:/1.jpg");		ImageIO.write(image, "jpeg", os);		os.close();	}}