org.noear.marsh.uadmin.utils.ImageUtils Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of marsh.uadmin Show documentation
Java project for marsh.uadmin
The newest version!
package org.noear.marsh.uadmin.utils;

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

/**
 * @author noear 2022/11/21 created
 */

public class ImageUtils {
    /*
     * 获取验证码图片
     */
    public static BufferedImage getValidationImage(String validation) {
        return getValidationImage(validation, 90, 40);
    }

    public static BufferedImage getValidationImage(String validation, int imgWidth, int imgHeight) {

        BufferedImage buffImg = new BufferedImage(imgWidth, imgHeight, BufferedImage.TYPE_INT_RGB);
        Graphics2D g = buffImg.createGraphics();


        Random random = new Random();

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

        // 创建字体
        Font font = new Font("sans-serif", Font.BOLD, 20);
        // 设置字体
        g.setFont(font);

        int red = 0, green = 0, blue = 0;

        for (int i = 0; i < validation.length(); i++) {
            // 取出待绘制字符
            String stringToDraw = "" + validation.charAt(i);
            // 随机颜色
            red = random.nextInt(155) + 50;
            green = random.nextInt(155) + 50;
            blue = random.nextInt(155) + 50;


            //坐标
            int x = i * 20 + 5;
            int y = 25 + random.nextInt(10) * (random.nextInt(2) % 2 == 0 ? 1 : -1);
            g.setColor(new Color(red,green,blue));


            g.drawString(stringToDraw, x, y);
        }

        //画些直线
        int LINE_MAX_COUNT = 3;
        int x1 = 0, y1 = 0, x2 = 0, y2 = 0;
        for (int i = 0; i < LINE_MAX_COUNT; i++) {
            // 坐标
            x1 = random.nextInt(imgWidth);
            y1 = random.nextInt(imgHeight);
            x2 = random.nextInt(imgWidth);
            y2 = random.nextInt(imgHeight);

            // 颜色
            red = random.nextInt(155) + 50;
            green = random.nextInt(155) + 50;
            blue = random.nextInt(155) + 50;

            g.setColor(new Color(red,green,blue));

            g.drawLine(x1,y1,x2,y2);
        }

        return buffImg;
    }
}