package com.javaweb.common.utils;

import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.util.Random;

public class TzCodeUtil {

	// 图片的宽度。
	private int width = 140;
	// 图片的高度。
	private int height = 40;
	// 验证码字符个数
	private int codeCount = 5;
	// 验证码干扰线数
	private int lineCount = 50;
	// 验证码图片Buffer
	private BufferedImage buffImg = null;

	private char[] codeSequence = { 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H',
			'I', 'J', 'K', 'M', 'N', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W',
			'X', 'Y', 'Z', '2', '3', '4', '5', '6', '7', '8', '9' };

	// 生成随机数
	private Random random = new Random();
	
	public TzCodeUtil(){
		
	}
	

	public String createCode() {
		int codeX = 0;
		int fontHeight = 0;
		fontHeight = height - 7;// 字体的高度
		codeX = width / (codeCount + 2);// 每个字符的宽度

		// 图像buffer
		buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		Graphics2D g = buffImg.createGraphics();

		// 将图像填充为白色
		g.setColor(Color.WHITE);
		g.fillRect(0, 0, width, height);

		// 创建字体
		ImgFontByte imgFont = new ImgFontByte();
		Font font = imgFont.getFont(fontHeight);
		g.setFont(font);

		// 绘制干扰线
		for (int i = 0; i < lineCount; i++) {
			int xs = getRandomNumber(width);
			int ys = getRandomNumber(height);
			int xe = xs + getRandomNumber(width / 8);
			int ye = ys + getRandomNumber(height / 8);
			g.setColor(getRandomColor());
			g.drawLine(xs, ys, xe, ye);
		}

		StringBuffer randomCode = new StringBuffer();
		// 随机产生验证码字符
		for (int i = 0; i < codeCount; i++) {
			String strRand = String.valueOf(codeSequence[random
					.nextInt(codeSequence.length)]);
			// 设置字体颜色
			g.setColor(getRandomColor());
			// 设置字体位置
			g.drawString(strRand, (i + 1) * codeX,
					getRandomNumber(height / 2) + 22);
			randomCode.append(strRand);
		}
		// 存入会话session
		return randomCode.toString();
	}

	/** 获取随机颜色 */
	private Color getRandomColor() {
		int r = getRandomNumber(255);
		int g = getRandomNumber(255);
		int b = getRandomNumber(255);
		return new Color(r, g, b);
	}

	/** 获取随机数 */
	private int getRandomNumber(int number) {
		return random.nextInt(number);
	}

	public BufferedImage getBuffImg() {
		return buffImg;
	}

	/** 字体样式类 */
	class ImgFontByte {
		public Font getFont(int fontHeight) {
			try {
				Font baseFont = Font.createFont(Font.TRUETYPE_FONT,
						new ByteArrayInputStream(hex2byte(getFontByteStr())));
				return baseFont.deriveFont(Font.PLAIN, fontHeight);
			} catch (Exception e) {
				return new Font("Arial", Font.PLAIN, fontHeight);
			}
		}

		private byte[] hex2byte(String str) {
			if (str == null)
				return null;
			str = str.trim();
			int len = str.length();
			if (len == 0 || len % 2 == 1)
				return null;

			byte[] b = new byte[len / 2];
			try {
				for (int i = 0; i < str.length(); i += 2) {
					b[i / 2] = (byte) Integer.decode(
							"0x" + str.substring(i, i + 2)).intValue();
				}
				return b;
			} catch (Exception e) {
				return null;
			}
		}

		// 字体文件的十六进制字符串
		private String getFontByteStr() {
			return "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";
		}
	}
}