Java base64图片 width height

可以使用Java的ImageIO类和Base64类来获取图片的宽度和高度，并将图片转换为Base64格式。以下是一个示例代码：

import java.awt.image.BufferedImage;
import java.io.ByteArrayOutputStream;
import java.io.File;import java.io.IOException;
import java.util.Base64;
import javax.imageio.ImageIO;

public class ImageUtils {
    public static String getImageBase64(File file) throws IOException {
        BufferedImage image = ImageIO.read(file);
        ByteArrayOutputStream baos = new ByteArrayOutputStream();
        ImageIO.write(image, "jpg", baos);
        byte[] bytes = baos.toByteArray();
        return Base64.getEncoder().encodeToString(bytes);
    }

    public static int[] getImageSize(File file) throws IOException {
        BufferedImage image = ImageIO.read(file);
        int width = image.getWidth();
        int height = image.getHeight();
        return new int[]{width, height};
    }
}

使用该类的getImageBase64方法可以将图片转换为Base64格式，getImageSize方法可以获取图片的宽度和高度。例如：

File file = new File("image.jpg");
String base64 = ImageUtils.getImageBase64(file);
int[] size = ImageUtils.getImageSize(file);
System.out.println("Base64: " + base64);
System.out.println("Width: " + size[0]);
System.out.println("Height: " + size[1]);