字节数组到Image对象

Question

我在Java中给出了一个byte []数组,其中包含图像的字节,我需要将其输出到图像中.我该怎么做呢？

非常感谢

Answer 1

BufferedImage img = ImageIO.read(new ByteArrayInputStream(bytes));

Answer 2

如果您知道图像的类型并且只想生成文件,则无需获取BufferedImage实例.只需将字节写入具有正确扩展名的文件即可.

OutputStream out = null;

try {
    out = new BufferedOutputStream(new FileOutputStream(path));
    out.write(bytes);
} finally {
    if (out != null) out.close();
}

Answer 3

From Database.
Blob blob = resultSet.getBlob("pictureBlob");               
byte [] data = blob.getBytes( 1, ( int ) blob.length() );
BufferedImage img = null;
try {
img = ImageIO.read(new ByteArrayInputStream(data));
} catch (IOException e) {
    e.printStackTrace();
}
drawPicture(img);  //  void drawPicture(Image img);