刷朋友圈，看到很多人發分隔後的9宮格，出現一個大圖挺好看，所以自己用java寫了一個圖片分隔器。

可以自定義分隔數。

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;

/**
 * @Description 圖片分隔-發微信朋友圈
 * @Author cheng2839
 * @Date 2018年10月04日
 * @Version v1.0
 */
public class MyTest028 {

    private static final String IMAGE_FILE_PATH 
 
= "E:\\timg.jpg";

    //橫向分隔個數
    private static final int SEP_X_NUM = 3;
    //縱向分隔個數
    private static final int SEP_Y_NUM = 3;

    public static void main(String[] args) {
        try {
            sepImage();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }


    
 
public static void sepImage() throws IOException {
        File file = new File(IMAGE_FILE_PATH);
        if (!file.exists() || !file.isFile()) {
            throw new RuntimeException("file not exists or un-file:" + IMAGE_FILE_PATH);
        }
        BufferedImage image = ImageIO.read(file);
        
 
int totalWidth = image.getWidth();
        int totalHeight = image.getHeight();
        int width = totalWidth / (SEP_X_NUM <=0?1:SEP_X_NUM);
        int height = totalHeight / (SEP_Y_NUM <=0?1:SEP_Y_NUM);


        File dirFile = new File(file.getParent(), file.getName().substring(0, file.getName().lastIndexOf(".")));
        if (!dirFile.exists()) {
            dirFile.mkdir();
        }

        for (int y = 0, j = 1; y <= totalHeight-height; y+=height, j++) {
            for (int x = 0, i = 1; x <= totalWidth-width; x+=width, i++) {
                File targetFile = new File(dirFile, j+"_"+i+".jpg");
                BufferedImage targetImage = new BufferedImage(width, height, BufferedImage.TYPE_INT_RGB);
                Graphics g = targetImage.getGraphics();
                System.out.println(targetFile.getPath() + ":    x="+x+",y="+y+"; width="+width+", height="+height+"; totalWidth"+totalWidth+",totalHeight="+totalHeight);
                g.drawImage(image.getSubimage(x, y, width, height), 0, 0, null);
                ImageIO.write(targetImage, "JPG", targetFile);
            }
        }
    }

}