java base64图片获取长宽

可以使用Java中的ImageIO类和BufferedImage类获取Base64编码的图片的长宽。具体实现可以参考以下代码：

import java.awt.image.BufferedImage;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.Base64;

import javax.imageio.ImageIO;

public class Base64Image {
    public static void main(String[] args) throws IOException {
        String base64Image = "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQEASABIAAD/...";        String[] base64Parts = base64Image.split(",");
        String base64Data = base64Parts[1];

        byte[] imageData = Base64.getDecoder().decode(base64Data);
        BufferedImage bufImg = ImageIO.read(new ByteArrayInputStream(imageData));

        int width = bufImg.getWidth();
        int height = bufImg.getHeight();

        System.out.println("Width: " + width);
        System.out.println("Height: " + height);
    }
}