上报图片直接进行裁切

src/main/java/com/ycwl/basic/utils/ImageUtils.java

@@ -3,7 +3,10 @@ package com.ycwl.basic.utils;
 import cn.hutool.core.codec.Base64;
 import org.springframework.web.multipart.MultipartFile;
 
+import javax.imageio.ImageIO;
+import java.awt.image.BufferedImage;
 import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
 import java.io.File;
 import java.io.FileOutputStream;
 import java.io.IOException;
@@ -21,6 +24,34 @@ public class ImageUtils {
         }
         return new Base64DecodedMultipartFile(b, baseStrs[0]);
     }
+
+    public static MultipartFile cropImage(MultipartFile file, int x, int y, int w, int h) throws IOException {
+        BufferedImage image = ImageIO.read(file.getInputStream());
+        if (image.getWidth() > w) {
+            w = image.getWidth();
+        }
+        if (image.getHeight() > h) {
+            h = image.getHeight();
+        }
+        int targetX = x;
+        if (x < 0) {
+            targetX = 0;
+        } else if ((x + w) > image.getWidth()) {
+            targetX = image.getWidth() - w;
+        }
+        int targetY = y;
+        if (y < 0) {
+            targetY = 0;
+        } else if ((y + h) > image.getHeight()) {
+            targetY = image.getHeight() - h;
+        }
+        BufferedImage targetImage = image.getSubimage(targetX, targetY, w, h);
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        ImageIO.write(targetImage, "jpg", baos);
+        baos.close();
+        return new Base64DecodedMultipartFile(baos.toByteArray(), "image/jpeg");
+    }
+
     public static class Base64DecodedMultipartFile implements MultipartFile {
 
         private final byte[] imgContent;