java 将bmp图片转换为png图片

java 将bmp图片转换为png图片，如果需要其他类型转换可以修改程序里面的文件扩展名。

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

import javax.imageio.ImageIO;

public class BmpToPng {
public static void main(String[] args) throws IOException{

File out= null;
File in = new File("d://My Documents//My Pictures//123.bmp");
BufferedImage input = ImageIO.read(in);
out = new File("d://My Documents//My Pictures//123.png");
ImageIO.write(input, "BMP", out);
input.flush();

}

}