How to copy image in java using bufferedreader/writer

后端 未结 2 1416
小鲜肉
小鲜肉 2021-01-27 21:56
    File file = new File(\"download.png\");
    File newfile = new File(\"D:\\\\Java.png\");
    BufferedReader br=null;
    BufferedWriter bw=null;
    try {
        Fi         


        
相关标签:
2条回答
  • 2021-01-27 22:23

    Use javax.imageio.ImageIO utility class, which has lots of utility method related to images processing.

    try{
        File imagefile = new File("download.png");
        BufferedImage image = ImageIO.read(imagefile);
        ImageIO.write(image, "png",new File("D:\\Java.png"));
        .....
    }
    
    0 讨论(0)
  • 2021-01-27 22:33

    Whats wrong with this code.

    You're using text-based classes for binary data.

    Is it possible with BufferedReader and Writer Class?

    Not while you're dealing with binary data, no.

    I know how to to make copy of image using InputStream and OutputStream, So don't paste solution using that!

    That's the solution you should use, because those are the classes designed for binary data.

    Fundamentally, using Reader or Writer for non-text data is broken, and asking for trouble. If you open up the file in a text editor and don't see text, it's not a text file... (Alternatively, it could be a text file that you're using the wrong encoding for, but things like images and sound aren't naturally text.)

    0 讨论(0)
提交回复
热议问题