小编Dav*_*Dee的帖子

我只是想让我网站的用户将提交的照片的方向从水平更改为垂直。这是我的代码：

public static final void rotatePhoto(String jpgFilename){
      BufferedImage originalImage = null, newImage=null;
      try{
         File file = new File(jpgFilename);
         originalImage = ImageIO.read(file);
System.out.println("Photo.rotatePhoto(" +jpgFilename +") originalImage.getWidth(null)=" +originalImage.getWidth(null) +" originalImage.getHeight(null)=" +originalImage.getHeight(null)  );

         java.awt.image.AffineTransformOp opRotated = new java.awt.image.AffineTransformOp( java.awt.geom.AffineTransform.getQuadrantRotateInstance(1), null );
         newImage = opRotated.createCompatibleDestImage(originalImage, originalImage.getColorModel());
         opRotated.filter(originalImage, newImage);
      }catch (IOException e){
      }

      /// Write result to file::::::::::::::::::::::::::::::::::::::::::::::::::::
      try{
         File outputfile = new File(testFilename);
         ImageIO.write(newImage, "jpg", outputfile);
      }catch(IOException ioE){
      }
   }

问题是，即使System.out.println将宽度和高度显示为640x480，我仍会收到此错误

java.awt.image.RasterFormatException: Transformed width (0) is less than or equal to 0.
    java.awt.image.AffineTransformOp.createCompatibleDestImage(AffineTransformOp.java:447)
    base.Photo.rotatePhoto(Photo.java:135) …