java 验证码静态验证码

最新推荐文章于 2023-11-01 15:40:28 发布

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本文介绍了一个使用Java实现的简单验证码生成器，该生成器能够创建包含随机字符的图片验证码，并支持自定义验证码长度及图片尺寸。文章展示了如何通过Java AWT库绘制验证码图片，包括背景颜色、字体样式、干扰线等细节。

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package com.zx;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.util.Random;

import javax.imageio.ImageIO;

public class App {
	
	private int width = 88;
	private int height = 20;
	private int codeCount = 4;
	private int xx = 15;
	private int fontHeight = 18;
	private int codeY = 16;
	char[] codeSequence = { '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', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9' };

	public App() {
	}

	public App(int codeCount) {
		this.codeCount = codeCount;
		this.width = codeCount * 22;
	}

	class VCode {
		private BufferedImage image;
		private String code;
		public BufferedImage getImage() {
			return image;
		}
		public void setImage(BufferedImage image) {
			this.image = image;
		}
		public String getCode() {
			return code;
		}
		public void setCode(String code) {
			this.code = code;
		}
	}

	public VCode getCode() {
		BufferedImage buffImg = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
		Graphics gd = buffImg.getGraphics();
		Random random = new Random();
		gd.setColor(Color.WHITE);
		gd.fillRect(0, 0, width, height);
		Font font = new Font("Fixedsys", Font.BOLD, fontHeight);
		gd.setFont(font);
		gd.setColor(Color.BLACK);
		gd.drawRect(0, 0, width - 1, height - 1);
		gd.setColor(Color.BLACK);
		for (int i = 0; i < 5; i++) {
			int x = random.nextInt(width);
			int y = random.nextInt(height);
			int xl = random.nextInt(12);
			int yl = random.nextInt(12);
			gd.drawLine(x, y, x + xl, y + yl);
		}

		StringBuffer randomCode = new StringBuffer();
		int red = 0, green = 0, blue = 0;
		for (int i = 0; i < codeCount; i++) {
			String code = String.valueOf(codeSequence[random.nextInt(36)]);
			red = random.nextInt(255);
			green = random.nextInt(255);
			blue = random.nextInt(255);
			gd.setColor(new Color(red, green, blue));
			gd.drawString(code, (i + 1) * xx, codeY);
			randomCode.append(code);
		}
		VCode vcode = new VCode();
		vcode.setCode(randomCode.toString());
		vcode.setImage(buffImg);
		return vcode;
	}
	
	public static void main(String[] args) throws IOException {
		App  app = new App();
		File file = new File("C:\\Users\\zx\\Desktop\\1.jpeg");
		FileOutputStream fileOutputStream = new FileOutputStream(file);
		ImageIO.write(app.getCode().getImage(), "jpeg", fileOutputStream);
	}
}