javabmp转换jpg
时间: 2023-05-30 09:02:41 浏览: 42
Java中可以使用ImageIO类来实现bmp转换为jpg,具体步骤如下:
1. 使用ImageIO读取bmp文件,得到BufferedImage对象:
```
File bmpFile = new File("input.bmp");
BufferedImage bmpImage = ImageIO.read(bmpFile);
```
2. 创建一个新的BufferedImage对象,指定宽度、高度和色彩模型:
```
int width = bmpImage.getWidth();
int height = bmpImage.getHeight();
BufferedImage jpgImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
```
3. 将bmpImage绘制到jpgImage上:
```
Graphics2D g2d = jpgImage.createGraphics();
g2d.drawImage(bmpImage, 0, 0, null);
g2d.dispose();
```
4. 使用ImageIO将jpgImage保存为jpg文件:
```
File jpgFile = new File("output.jpg");
ImageIO.write(jpgImage, "jpg", jpgFile);
```
完整代码示例:
```
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.io.File;
import javax.imageio.ImageIO;
public class BmpToJpg {
public static void main(String[] args) throws Exception {
File bmpFile = new File("input.bmp");
BufferedImage bmpImage = ImageIO.read(bmpFile);
int width = bmpImage.getWidth();
int height = bmpImage.getHeight();
BufferedImage jpgImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
Graphics2D g2d = jpgImage.createGraphics();
g2d.drawImage(bmpImage, 0, 0, null);
g2d.dispose();
File jpgFile = new File("output.jpg");
ImageIO.write(jpgImage, "jpg", jpgFile);
}
}
```