java之圖片格式轉換

package fileTest;

import java.awt.Color;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Spliterator;

import javax.imageio.ImageIO;

public class FileName {

    public static void main(String[] args) throws IOException {
        String dirName="C:\\Users\\dsp\\Desktop\\JP首頁圖片";//存放圖片的文件夾
        File f=new File(dirName);
        ArrayList<String> path=new ArrayList<String>();//存放每個圖片的路徑
        if (f.isDirectory()) {
            String[] imgs=f.list();
                for(int i=0;i<imgs.length;i++) {

                System.out.println(imgs[i]);
                     String name = dirName+"\\"+imgs[i];
                    path.add(name);

                }

        }
        for (String object : path) {
            System.out.println(object);
            String[] nf=object.split("\\.");//通過split截取文件路徑
            System.out.println(nf[0]);
            File f2=new File(object);
             BufferedImage srcImg = ImageIO.read(f2);//使用imgeIO來讀取圖片
         ImageIO.write(srcImg, "png", new File(nf[0]+".png"));//重新創建圖片
        }
    }

}