保存调整大小的图像java

Question

如何将调整大小的图像保存到特定文件夹？

private void jButton1ActionPerformed(java.awt.event.ActionEvent evt) {                                         
    ImgChooser ic = new ImgChooser();
    ImageIcon icon = new ImageIcon(me,"id pic");
    Image img1 = icon.getImage();
    Image img2 = img1.getScaledInstance(105, 105, 0);
    icon.setImage(img2);
    jLabel1.setIcon(icon);
} 

第一个代码是我获取图像并调整其大小的地方。然后我希望将调整大小的图像保存在另一个文件夹中。提前致谢

Answer 1

正如其他人已经说过的那样使用ImageIO.write(...)（给他们+1），在这里添加一个例子：

public static void main(String[] args) {

    try {

        BufferedImage originalImage = ImageIO.read(new File("c:\\test.jpg"));//change path to where file is located
        int type = originalImage.getType() == 0 ? BufferedImage.TYPE_INT_ARGB : originalImage.getType();

        BufferedImage resizeImageJpg = resizeImage(originalImage, type, 100, 100);
        ImageIO.write(resizeImageJpg, "jpg", new File("c:\\images\\testresized.jpg")); //change path where you want it saved

    } catch (IOException e) {
        System.out.println(e.getMessage());
    }

}

private static BufferedImage resizeImage(BufferedImage originalImage, int type, int IMG_WIDTH, int IMG_HEIGHT) {
    BufferedImage resizedImage = new BufferedImage(IMG_WIDTH, IMG_HEIGHT, type);
    Graphics2D g = resizedImage.createGraphics();
    g.drawImage(originalImage, 0, 0, IMG_WIDTH, IMG_HEIGHT, null);
    g.dispose();

    return resizedImage;
}

参考：

• http://www.mkyong.com/java/how-to-resize-an-image-in-java/

Answer 2

试试这个...

使用ImageIO.write() 方法...

static boolean ImageIO.write(RenderedImage im, String formatName, File output) throws IOException

例如：

try {

    // retrieve image

    BufferedImage bi = getMyImage();
    File outputfile = new File("saved.png");
    ImageIO.write(bi, "png", outputfile);

} catch (IOException e) {
    ...
}

Answer 3

先把你的图片转换成BufferedImage，然后用ImageIO保存图片：

BufferedImage image = new BufferedImage(img2.getWidth(null), img2.getHeight(null), BufferedImage.TYPE_4BYTE_ABGR);
Graphics2D g2 = image.createGraphics();
g2.drawImage(img2, 0, 0, null);
g2.dispose();
ImageIO.write(image, formatName, outputFile);

其中格式名称为String，例如"jpg"、"png" 或"gif"，而outputFile 是将图像保存到的File。

另外请注意，如果您保存的图像不支持 alpha 级别（透明度），那么您传递给 BufferedImage 构造函数的第三个参数应该是一个 3 字节图像，例如：BufferedImage.TYPE_3BYTE_BGR