OutputStreamIOSSpi.java 文件源码

@Override
public ImageOutputStream createOutputStreamInstance(Object output, boolean useCache, File cacheDir) throws IOException {
    if (output instanceof OutputStream) {
        if (useCache) {
            return new FileCacheImageOutputStream((OutputStream) output, cacheDir);
        } else {
            return new MemoryCacheImageOutputStream((OutputStream) output);
        }
    }
    throw new IllegalArgumentException(Messages.getString("imageio.85"));
}