66 lines
2.1 KiB
Java
66 lines
2.1 KiB
Java
package com.mir4updater.backend.utils;
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import jakarta.servlet.http.HttpServletRequest;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.util.Random;
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//生成验证码，并将验证码存入session中，以ip为key
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public class CheckCodeUtils {
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public static BufferedImage getCheckCode(HttpServletRequest request, String ip) {
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int width = 60, height = 30;
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//创建一个图像，宽60 高30
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BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
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Graphics g = image.getGraphics();
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Random random = new Random();
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g.setColor(getRandomColor(200, 250));
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g.fillRect(0, 0, width, height);
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g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
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g.setColor(getRandomColor(160, 200));
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//干扰线生成
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for (int i = 0; i < 10; i++) {
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int x = random.nextInt(width);
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int y = random.nextInt(height);
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int xl = random.nextInt(12);
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int yl = random.nextInt(12);
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g.drawLine(x, y, x + xl, y + yl);
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}
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String strCode = "";
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for (int i = 0; i < 4; i++) {
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String strNumber = String.valueOf(random.nextInt(10));
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strCode = strCode + strNumber;
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//设置字体颜色
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g.drawString(strNumber, 13 * i + 6, 20);
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}
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System.out.println("当前ip" + ip);
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System.out.println("当前验证码" + strCode);
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request.getSession().setAttribute(ip, strCode);
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g.dispose();
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return image;
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}
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/**
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* 随机获取颜色的方法
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*
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* @return
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*/
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public static Color getRandomColor(int fc, int bc) {
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Random random = new Random();
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Color reandomColor = null;
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if (fc > 255) {
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fc = 255;
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}
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if (bc > 255) {
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bc = 255;
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}
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int r = fc + random.nextInt(bc - fc);
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int g = fc + random.nextInt(bc - fc);
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int b = fc + random.nextInt(bc - fc);
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reandomColor = new Color(r, g, b);
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return reandomColor;
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}
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} |