jpg与gif的互换（使用ImageIO代替JPEGImageEncoder）

要实现依赖于 animated-gif-lib-1.2.jar

gif转jpg

public synchronized static void toJpg(String gifName) throws IOException {
           /**
            * 在GIF的拆分和组装使用了animated_gif_jar工具包
            * 主要类是 gifdecoder 
            * "E:/desk/Desktop/0805_3.gif"
            */
        GifDecoder decoder = new GifDecoder();
        InputStream is = new FileInputStream(gifName);
        if(decoder.read(is) != 0) {
            System.out.println("读取有误");
            return;
        }
        is.close();
        System.out.println("帧的数量"+ decoder.getFrameCount());
        for(int i = 0; i < decoder.getFrameCount();i++) {
            BufferedImage frame = decoder.getFrame(i);
            int delay = decoder.getDelay(i);
            System.out.println("延迟时间"+ delay);
            OutputStream out = new FileOutputStream("E:/desk/Desktop/giffer/" + i + "g.jpg");
            ImageIO.write(frame, "png", out);
            out.flush();
            out.close();
        }

}

jpg转gif

public static void toGif(String path) throws IOException {
            try {
            int count = new File("E:/desk/Desktop/giffer").list().length;
            System.out.println(count);
            ByteArrayOutputStream outputStream2 = new ByteArrayOutputStream();
            BufferedImage[] src = new BufferedImage[count]; 
            AnimatedGifEncoder encoder = new AnimatedGifEncoder();
            encoder.setRepeat(0);
            encoder.start(outputStream2);
            for(int i = 0;i < count;i++) {
                    encoder.setDelay(50);
                    src[ i ] = ImageIO.read(new File("E:/desk/Desktop/giffer/"+ i +"g.jpg"));
                    encoder.addFrame(src[i]);           
            }
            encoder.finish();
            System.out.println(count);
            File file = new File("E:/desk/Desktop/conn/1.gif");
              FileOutputStream fileOutputStream = new FileOutputStream(file);
              byte[] bytearray = outputStream2.toByteArray();
                fileOutputStream.write(bytearray);
                fileOutputStream.flush();
            }catch(Exception e) {
                 System.out.println( "jpgToGif Failed:");  
                    e.printStackTrace();  
            }
        }


}

“`