Java 获取图片的大小、宽、高
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import javax.imageio.ImageIO;
public class Picture {
public static void main(String[] args) throws FileNotFoundException, IOException {
File picture = new File("E:/PrintScreen/StarSky.jpg");
BufferedImage sourceImg = ImageIO.read(new FileInputStream(picture));
System.out.println(String.format("Size: %.1f KB", picture.length()/1024.0));
System.out.println("Width: " + sourceImg.getWidth());
System.out.println("Height: " + sourceImg.getHeight());
}
}
import java.io.File;
import java.io.IOException;
import java.util.Iterator;
import javax.imageio.ImageIO;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
public class Picture {
public static void main(String[] args) {
String srcPath = "E:/PrintScreen/1.jpg";
File file = new File(srcPath);
try {
Iterator<ImageReader> readers = ImageIO.getImageReadersByFormatName("jpg");
ImageReader reader = (ImageReader) readers.next();
ImageInputStream iis = ImageIO.createImageInputStream(file);
reader.setInput(iis, true);
System.out.println("width: " + reader.getWidth(0));
System.out.println("height: " + reader.getHeight(0));
} catch (IOException e) {
e.printStackTrace();
}
}
}
注意:图片是预先存放在Java Project下的Package中
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.IOException;
import java.net.URL;
import javax.imageio.ImageIO;
public class GetImageSize {
public static void main(String[] args) throws IOException {
BufferedImage bi = null;
try {
URL u = GetImageSize.class.getClassLoader().getResource("images/background.png");
bi = ImageIO.read(u);
} catch (IOException e) {
e.printStackTrace();
}
Image img = bi;
System.out.println(img.getWidth(null));
System.out.println(img.getHeight(null));
}
}
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