工具类：随机生成图片和颜色

深碍√TFBOYSˉ_ 2024-03-22 15:32 6阅读 0赞

import java.awt.Color;
    import java.awt.Font;
    import java.awt.Graphics;
    import java.awt.image.BufferedImage;
    import java.util.HashMap;
    import java.util.Map;
    import java.util.Random;
    
    public class CodeUtil {
        
        private static final String[] chars = {
        "0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c"};
        private static final int SIZE = 4;
        private static final int LINES = 8;
        private static final int WIDTH = 55;
        private static final int HEIGHT = 25;
        private static final int FONT_SIZE = 16;
    
        public static Map<String, BufferedImage> createImage() {
        
            StringBuffer sb = new StringBuffer();
            BufferedImage image = new BufferedImage(WIDTH, HEIGHT,
                    BufferedImage.TYPE_INT_RGB);
            Graphics graphic = image.getGraphics();
            graphic.setColor(Color.WHITE);
            graphic.fillRect(0, 0, WIDTH, HEIGHT);
            Random ran = new Random();
            //画随机字符
            for (int i = 1; i <= SIZE; i++) {
        
    
                int r = ran.nextInt(chars.length);
                graphic.setColor(getRandomColor());
                graphic.setFont(new Font(null, Font.BOLD + Font.ITALIC, FONT_SIZE));
                graphic.drawString(chars[r], (i - 1) * WIDTH / SIZE, HEIGHT / 2);
                sb.append(chars[r]);//将字符保存，存入Session
            }
            //画干扰线
            for (int i = 2; i <= LINES; i++) {
        
                graphic.setColor(getRandomColor());
                graphic.drawLine(ran.nextInt(WIDTH), ran.nextInt(HEIGHT), ran.nextInt(WIDTH), ran.nextInt(HEIGHT));
            }
            Map<String, BufferedImage> map = new HashMap<String, BufferedImage>();
            map.put(sb.toString(), image);
            return map;
        }
    
        public static Color getRandomColor() {
        
            Random ran = new Random();
            Color color = new Color(ran.nextInt(256), ran.nextInt(256), ran.nextInt(256));
            return color;
        }
    
        public static void main(String[] args) {
        
            Map<String, BufferedImage> image = createImage();
            System.out.println(image);
    
            Color randomColor = getRandomColor();
            System.out.println(randomColor);
        }
    	
    }