3.4.5 update-20250411，新功能开发

teachcloud-mark/src/main/java/com/qmth/teachcloud/mark/utils/AiUtil.java

@@ -0,0 +1,93 @@
+package com.qmth.teachcloud.mark.utils;
+
+import com.qmth.teachcloud.common.bean.dto.mark.PictureConfig;
+import com.qmth.teachcloud.mark.dto.mark.manage.TrackDTO;
+
+import javax.imageio.ImageIO;
+import javax.imageio.ImageReadParam;
+import javax.imageio.ImageReader;
+import javax.imageio.stream.ImageInputStream;
+import java.awt.*;
+import java.awt.image.BufferedImage;
+import java.io.File;
+import java.io.IOException;
+import java.util.Iterator;
+
+public class AiUtil {
+
+    /**
+     * 生成评卷区在原图中的位置
+     *
+     * @param subFile       原图
+     * @param pictureConfig 评卷区坐标
+     */
+    public TrackDTO setOffset(File subFile, PictureConfig pictureConfig) {
+        try {
+            BufferedImage image = ImageIO.read(subFile);
+            int width = image.getWidth();
+            int height = image.getHeight();
+
+            TrackDTO trackDTO = new TrackDTO();
+            int x = (int) (width * pictureConfig.getX());
+            int y = (int) (height * pictureConfig.getY());
+            int w = (int) (width * pictureConfig.getW());
+            int h = (int) (height * pictureConfig.getH());
+
+            trackDTO.setOffsetX(x + w / 3);
+            trackDTO.setOffsetY(y + h / 3);
+            return trackDTO;
+        } catch (IOException e) {
+            throw new RuntimeException(e);
+        }
+    }
+
+    /**
+     * 裁剪图片
+     *
+     * @param sourceFile 源文件
+     * @param x          x起点
+     * @param y          y起点
+     * @param width      宽度
+     * @param height     调试
+     * @param outFile    输出文件
+     */
+    public File subImg(File sourceFile, int x, int y, int width, int height, File outFile) {
+        ImageInputStream iis = null;
+        try {
+            if (outFile.exists()) {
+                outFile.delete();
+            }
+            //图片输入流
+            iis = ImageIO.createImageInputStream(sourceFile);
+            //图片读取器
+            Iterator<ImageReader> it = ImageIO.getImageReaders(iis);
+
+            if (it.hasNext()) {
+                ImageReader r = it.next();
+                //设置输入流
+                r.setInput(iis, true);
+                //读取参数
+                ImageReadParam param = r.getDefaultReadParam();
+                //创建要截取的矩形范围
+                Rectangle rect = new Rectangle(x, y, width, height);
+                //设置截取范围参数
+                param.setSourceRegion(rect);
+                //读取截图数据
+                BufferedImage bi = r.read(0, param);
+                // 保存图片
+                ImageIO.write(bi, "jpg", outFile);
+            }
+            return outFile;
+        } catch (IOException e) {
+            e.printStackTrace();
+        } finally {
+            try {
+                iis.close();
+            } catch (IOException e) {
+                e.printStackTrace();
+            }
+        }
+        return null;
+    }
+
+}