package util;
import javax.imageio.ImageIO;
import javax.imageio.ImageReadParam;
import javax.imageio.ImageReader;
import javax.imageio.stream.ImageInputStream;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.Iterator;
public class PicCrop {
public static void main(String[] args) {
FileInputStream fileInputStream = null;
ImageInputStream imageInputStream = null;
try {
fileInputStream = new FileInputStream("/home/yumingzhe/a.jpg");
Iterator iterator = ImageIO.getImageReadersByFormatName("jpg");
ImageReader imageReader = (ImageReader) iterator.next();
imageInputStream = ImageIO.createImageInputStream(fileInputStream);
imageReader.setInput(imageInputStream, true);
ImageReadParam param = imageReader.getDefaultReadParam();
Rectangle rect = new Rectangle(0, 0, 100, 100);
param.setSourceRegion(rect);
BufferedImage bi = imageReader.read(0, param);
ImageIO.write(bi, "jpg", new File("/home/yumingzhe/b.jpg"));
imageInputStream.close();
fileInputStream.close();
} catch (FileNotFoundException e) {
e.printStackTrace();
} catch (IOException e) {
e.printStackTrace();
}
}
}