以下是生成缩略图的代码,生成GIF的缩略图没有动画效果,有知道人帮忙看下!用的是gif4j.jar
public static void createFixedBoundImg(String OriFilePath, String TargetFilePath, int height, int width)
                                throws Exception {
        
        double Ratio = 0.0;
        File f = new File(OriFilePath);
        Image src = ImageIO.read(f);
        int oriWidth = src.getWidth(null);
        int oriHeight = src.getHeight(null);
        int tagWidth, tagHeight;
        if (oriWidth > width || oriHeight > height) {
            if (oriHeight > oriWidth) {
                Ratio = (new Integer(height)).doubleValue() / oriHeight;
                tagHeight = height;
                tagWidth = (int) (oriWidth * Ratio);
            }
            else {
                Ratio = (new Integer(width)).doubleValue() / oriWidth;
                tagHeight = (int) (oriHeight * Ratio);
                tagWidth = width;
            }
        }
        else {
            tagHeight = oriHeight;
            tagWidth = oriWidth;
        }
        
        BufferedImage target = new BufferedImage(tagWidth, tagHeight, BufferedImage.TYPE_INT_RGB);
        target.getGraphics().drawImage(src, 0, 0, tagWidth, tagHeight, null);
        FileOutputStream out = new FileOutputStream(TargetFilePath);
        //JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(out);
        //encoder.encode(target);  
        GifEncoder.encode(target, out);
        out.close();
    }