move api

src/main/java/com/mir4updater/backend/utils/CheckCodeUtils.java

@@ -0,0 +1,66 @@
+package com.mir4updater.backend.utils;
+
+
+import jakarta.servlet.http.HttpServletRequest;
+
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.util.Random;
+
+//生成验证码，并将验证码存入session中，以ip为key
+public class CheckCodeUtils {
+    public static BufferedImage getCheckCode(HttpServletRequest request, String ip) {
+        int width = 60, height = 30;
+        //创建一个图像，宽60 高30
+        BufferedImage image = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
+        Graphics g = image.getGraphics();
+        Random random = new Random();
+        g.setColor(getRandomColor(200, 250));
+        g.fillRect(0, 0, width, height);
+        g.setFont(new Font("Times New Roman", Font.PLAIN, 18));
+        g.setColor(getRandomColor(160, 200));
+        //干扰线生成
+        for (int i = 0; i < 10; i++) {
+            int x = random.nextInt(width);
+            int y = random.nextInt(height);
+            int xl = random.nextInt(12);
+            int yl = random.nextInt(12);
+            g.drawLine(x, y, x + xl, y + yl);
+        }
+        String strCode = "";
+        for (int i = 0; i < 4; i++) {
+            String strNumber = String.valueOf(random.nextInt(10));
+            strCode = strCode + strNumber;
+            //设置字体颜色
+            g.drawString(strNumber, 13 * i + 6, 20);
+        }
+        System.out.println("当前ip" + ip);
+        System.out.println("当前验证码" + strCode);
+        request.getSession().setAttribute(ip, strCode);
+        g.dispose();
+        return image;
+    }
+
+
+    /**
+     * 随机获取颜色的方法
+     *
+     * @return
+     */
+    public static Color getRandomColor(int fc, int bc) {
+        Random random = new Random();
+        Color reandomColor = null;
+        if (fc > 255) {
+            fc = 255;
+        }
+        if (bc > 255) {
+            bc = 255;
+        }
+        int r = fc + random.nextInt(bc - fc);
+        int g = fc + random.nextInt(bc - fc);
+        int b = fc + random.nextInt(bc - fc);
+        reandomColor = new Color(r, g, b);
+        return reandomColor;
+    }
+
+}