Java,import java.awt.image.BufferedImage;,import java.io.File;,import javax.imageio.ImageIO;,,public class ImageCutter {,, public static BufferedImage cropImage(BufferedImage source, int x, int y, int width, int height) {, return source.getSubimage(x, y, width, height);, },, public static void main(String[] args) {, try {, BufferedImage sourceImage = ImageIO.read(new File("source.jpg"));, BufferedImage croppedImage = cropImage(sourceImage, 50, 50, 200, 200);, ImageIO.write(croppedImage, "jpg", new File("cropped.jpg"));, } catch (Exception e) {, e.printStackTrace();, }, },},
``SELECT
、INSERT
、UPDATE
、DELETE
等。要查询一个名为users
的表中的所有记录,可以使用以下命令:,,``sql,SELECT * FROM users;,
`,,要插入一条新记录到
users表中,可以使用:,,
`sql,INSERT INTO users (name, age) VALUES ('Alice', 30);,
`,,要更新
users表中某条记录的信息,可以使用:,,
`sql,UPDATE users SET age = 31 WHERE name = 'Alice';,
`,,要删除
users表中某条记录,可以使用:,,
`sql,DELETE FROM users WHERE name = 'Alice';,
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