图片压缩

src/main/java/com/sqx/modules/file/utils/FileUploadUtils.java

@@ -9,6 +9,7 @@ import org.apache.commons.lang3.time.DateFormatUtils;
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.web.multipart.MultipartFile;
 
+import java.awt.*;
 import java.awt.image.BufferedImage;
 import java.io.*;
 import java.net.URL;
@@ -116,9 +117,37 @@ public class FileUploadUtils
         //file.transferTo(desc);
         IoUtil.close(out);
         String pathFileName = getPathFileName(baseDir, fileName);
+        try {
+            File inputImageFile = new File(pathFileName); // 替换为实际图片路径
+            byte[] compressedImage = compressImage(inputImageFile, 0.5f); // 压缩比例，如0.5表示压缩50%
+
+            // 将压缩后的图片保存到文件
+            File outputFile = new File(pathFileName); // 替换为输出图片路径
+            ImageIO.write(ImageIO.read(new ByteArrayInputStream(compressedImage)), "png", outputFile);
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
         return pathFileName;
     }
+    public static byte[] compressImage(File imageFile, float scale) throws IOException {
+        BufferedImage originalImage = ImageIO.read(imageFile);
+        // 保存缩放后的图片到输出流
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+        Image compressedImage = originalImage.getScaledInstance(
+                (int)(originalImage.getWidth() * scale),
+                (int)(originalImage.getHeight() * scale),
+                Image.SCALE_SMOOTH);
 
+        BufferedImage outputImage = new BufferedImage(
+                compressedImage.getWidth(null),
+                compressedImage.getHeight(null),
+                BufferedImage.TYPE_INT_RGB);
+
+        outputImage.createGraphics().drawImage(compressedImage, 0, 0, null);
+        ImageIO.write(outputImage, "png", outputStream); // 或者 "png" 如果是PNG图片
+
+        return outputStream.toByteArray();
+    }
     /**
      * 编码文件名
      */