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  • Java画出验证码图片

    package com;
    
    import javax.imageio.ImageIO;
    import java.awt.*;
    import java.awt.image.BufferedImage;
    import java.io.File;
    import java.io.IOException;
    import java.util.Random;
    //验证码
    public class Imageyan {
        public static void main(String[] args) throws IOException {
            int id = 4;
            int w = id*50;
            int h = 80;
            BufferedImage buf = new BufferedImage(w,h,1);
            Graphics g = buf.getGraphics();
            g.setColor(Color.WHITE);
            g.fillRect(0,0,w,h);
            Random ran = new Random();
            //设置字
            Font font = new Font("宋体",Font.PLAIN,40);
            g.setFont(font);
            for(int i = 0;i < id;i++) {
                Color color = new Color(ran.nextInt(255),ran.nextInt(255),ran.nextInt(255),255);
                g.setColor(color);
                String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
                String str = "";
                str = chars.charAt(ran.nextInt(chars.length()))+"";
                int x = 20 + i * 45;
                int y = 50;
                g.drawString(str, x, y);
            }
            //添加干扰文字
            for(int i = 0;i < id;i++) {
                Color color = new Color(ran.nextInt(255),ran.nextInt(255),ran.nextInt(255),100);
                g.setColor(color);
                String chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ1234567890";
                String str = "";
                str = chars.charAt(ran.nextInt(chars.length()))+"";
                g.drawString(str, ran.nextInt(w),ran.nextInt(h));
            }
            //添加线条
            for (int a = 0; a < 30; a++) {
                Color color = new Color(ran.nextInt(255),ran.nextInt(255),ran.nextInt(255),ran.nextInt(255));
                g.setColor(color);
                g.drawLine(ran.nextInt(w),ran.nextInt(w),ran.nextInt(w),ran.nextInt(w));
            }
            //添加弧线
            for (int a = 0; a < 30; a++) {
                Color color = new Color(ran.nextInt(255),ran.nextInt(255),ran.nextInt(255),ran.nextInt(255));
                g.setColor(color);
                g.drawArc(ran.nextInt(w),ran.nextInt(w),ran.nextInt(w),ran.nextInt(w),ran.nextInt(360),ran.nextInt(360));
            }
    
            g.dispose();
            ImageIO.write(buf,"jpg",new File("d:/img/five.jpg"));
        }
    }
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  • 原文地址:https://www.cnblogs.com/zxwen/p/9526446.html
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