imagecode.java

EasyJWeb的框架代码

package com.easyjf.web.tools;

import java.awt.*;
import java.awt.image.*;
import java.util.*;
/**
 * 随机码图像处理类
 * @author 大峡
 *
 */
public class ImageCode {

	public String sRand = "";

	public Color getRandColor(int fc, int bc) {// 给定范围获得随机颜色
		Random random = new Random();
		if (fc > 255)
			fc = 255;
		if (bc > 255)
			bc = 255;
		int r = fc + random.nextInt(bc - fc);
		int g = fc + random.nextInt(bc - fc);
		int b = fc + random.nextInt(bc - fc);
		return new Color(r, g, b);
	}

	public BufferedImage creatImage() {
		// 在内存中创建图象
		int width = 60, height = 20;
		BufferedImage image = new BufferedImage(width, height,
				BufferedImage.TYPE_INT_RGB);
		// 获取图形上下文
		Graphics g = image.getGraphics();
		// 生成随机类
		Random random = new Random();
		// 设定背景色
		g.setColor(getRandColor(200, 250));
		g.fillRect(0, 0, width, height);
		// 设定字体
		g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
		// 画边框
		// g.setColor(new Color());
		// g.drawRect(0,0,width-1,height-1);
		// 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
		g.setColor(getRandColor(160, 200));
		for (int i = 0; i < 155; i++) {
			int x = random.nextInt(width);
			int y = random.nextInt(height);
			int xl = random.nextInt(12);
			int yl = random.nextInt(12);
			g.drawLine(x, y, x + xl, y + yl);
		}
		// 取随机产生的认证码(4位数字)
		// String rand = request.getParameter("rand");
		// rand = rand.substring(0,rand.indexOf("."));
		for (int i = 0; i < 4; i++) {
			String rand = String.valueOf(random.nextInt(10));
			sRand += rand;
			// 将认证码显示到图象中
			g.setColor(new Color(20 + random.nextInt(110), 20 + random
					.nextInt(110), 20 + random.nextInt(110)));// 调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成
			g.drawString(rand, 13 * i + 6, 16);
		}
		// 图象生效
		g.dispose();
		return image;
	}

	/**
	 * @return Returns the sRand.
	 */
	public String getSRand() {
		return sRand;
	}

	public BufferedImage creatImage(int number) {
		// 在内存中创建图象
		String num = String.valueOf(number);
		char[] vs = num.toCharArray();

		int width = vs.length * 60 / 4, height = 18;
		BufferedImage image = new BufferedImage(width, height,
				BufferedImage.TYPE_INT_RGB);
		// 获取图形上下文
		Graphics g = image.getGraphics();
		// 生成随机类
		Random random = new Random();
		// 设定背景色
		g.setColor(Color.WHITE);
		g.fillRect(0, 0, width, height);
		// 设定字体
		g.setFont(new Font("Impact", Font.PLAIN, 14));
		// 画边框
		// g.setColor(new Color());
		// g.drawRect(0,0,width-1,height-1);
		// 随机产生155条干扰线，使图象中的认证码不易被其它程序探测到
		/*
		 * g.setColor(getRandColor(160, 200)); for (int i = 0; i < 155; i++) {
		 * int x = random.nextInt(width); int y = random.nextInt(height); int xl =
		 * random.nextInt(12); int yl = random.nextInt(12); g.drawLine(x, y, x +
		 * xl, y + yl); }
		 */
		// 取随机产生的认证码(4位数字)
		// String rand = request.getParameter("rand");
		// rand = rand.substring(0,rand.indexOf("."));
		for (int i = 0; i < vs.length; i++) {
			String rand = String.valueOf(vs[i]);
			sRand += rand;
			// 将认证码显示到图象中
			g.setColor(new Color(20 + random.nextInt(110), 20 + random
					.nextInt(110), 20 + random.nextInt(110)));// 调用函数出来的颜色相同，可能是因为种子太接近，所以只能直接生成
			g.drawString(rand, 13 * i + 6, 16);

		}
		// 图象生效
		g.dispose();
		return image;
	}

	public BufferedImage creatImage3D(int number, int max) {
		// 在内存中创建图象
		int width = 60, height = 10;
		int x = number * width / max;
		System.out.println(x);
		BufferedImage image = new BufferedImage(x, height,
				BufferedImage.TYPE_INT_RGB);
		// 获取图形上下文

		Graphics g = image.getGraphics();
		// g.fillRect(0, 0, width, height);

		g.setColor(this.getRandColor(100, 200));
		g.draw3DRect(0, 0, x, height, true);
		g.fill3DRect(0, 0, x, height, true);
		// 图象生效
		g.dispose();
		return image;
	}
}