文件压缩250图片格式

rs-universal/rs-universal-server/src/main/java/com/upyuns/platform/rs/universal/service/UploadService.java

@@ -104,6 +104,37 @@ public class    UploadService {
     }
 
 
+//    public String uploadFile250(MultipartFile file, String prefix) throws Exception {
+////        // 创建本日存放目录
+////        DateTime now = DateTime.now();
+////        String dirPathToday = "/" + prefix + "/" + now.toString(DEFAULT_DATE_TIME_FORMATTER);
+////        String redisNoKey = RedisKey.UPLOAD_FILE_NO_PREFIX + now.toString(DEFAULT_DATE_TIME_FORMATTER);
+////        Long no = redisTemplate.opsForValue().increment(redisNoKey);
+////        if (no.equals(1L)) {
+////            redisTemplate.expire(redisNoKey, 1, TimeUnit.DAYS);
+////        }
+////        String fileName = file.getOriginalFilename();
+////        String realFileRelPath = dirPathToday + "/" + no + fileName.substring(fileName.lastIndexOf("."));
+////        // 文件存放路径
+////        String filePath = baseUploadPath + realFileRelPath;
+////        // 将文件写入指定位置
+////        FileUtils.copyInputStreamToFile(file.getInputStream(), new File(filePath));
+////
+////        // 将上传的图片压缩成250*250的尺寸
+////        BufferedImage originalImage = ImageIO.read(new File(filePath));
+////        BufferedImage resizedImage = new BufferedImage(250, 250, originalImage.getType());
+////        Graphics2D g = resizedImage.createGraphics();
+////        g.drawImage(originalImage, 0, 0, 250, 250, null);
+////        g.dispose();
+////
+////        // 保存压缩后的图片
+////        String compressedFilePath = baseUploadPath + dirPathToday  + no + ".jpg_250";
+////        ImageIO.write(resizedImage, "jpg", new File(compressedFilePath));
+////
+////        realFileRelPath = xx_url + SystemConfig.XXMP_URL + realFileRelPath;
+////        return realFileRelPath;
+////    }
+
     public String uploadFile250(MultipartFile file, String prefix) throws Exception {
         // 创建本日存放目录
         DateTime now = DateTime.now();
@@ -120,15 +151,28 @@ public class    UploadService {
         // 将文件写入指定位置
         FileUtils.copyInputStreamToFile(file.getInputStream(), new File(filePath));
 
-        // 将上传的图片压缩成250*250的尺寸
+        // 将上传的图片等比例缩放至250x250尺寸
         BufferedImage originalImage = ImageIO.read(new File(filePath));
-        BufferedImage resizedImage = new BufferedImage(250, 250, originalImage.getType());
+        int originalWidth = originalImage.getWidth();
+        int originalHeight = originalImage.getHeight();
+        double scaleFactor = 1.0;
+
+        if (originalWidth > originalHeight) {
+            scaleFactor = (double) 250 / originalWidth;
+        } else {
+            scaleFactor = (double) 250 / originalHeight;
+        }
+
+        int newWidth = (int) (originalWidth * scaleFactor);
+        int newHeight = (int) (originalHeight * scaleFactor);
+
+        BufferedImage resizedImage = new BufferedImage(newWidth, newHeight, originalImage.getType());
         Graphics2D g = resizedImage.createGraphics();
-        g.drawImage(originalImage, 0, 0, 250, 250, null);
+        g.drawImage(originalImage, 0, 0, newWidth, newHeight, null);
         g.dispose();
 
         // 保存压缩后的图片
-        String compressedFilePath = baseUploadPath + dirPathToday + "/compressed_" + no + ".jpg";
+        String compressedFilePath = baseUploadPath + dirPathToday + no + ".jpg_250";
         ImageIO.write(resizedImage, "jpg", new File(compressedFilePath));
 
         realFileRelPath = xx_url + SystemConfig.XXMP_URL + realFileRelPath;