Java 生成缩略图的代码

最新推荐文章于 2022-08-02 19:28:56 发布

转载最新推荐文章于 2022-08-02 19:28:56 发布 · 1k 阅读

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本文提供了一个Java代码示例，演示了如何从原始图片文件创建并保存一个等比例缩小四倍的缩略图。该过程涉及读取原始图片、调整大小并使用JPEG编码保存为新的文件。

import java.io.*;
import java.awt.image.*;
import com.sun.image.codec.jpeg.*;

public class GetThumbnailImage {
    public static void main(String[] args) throws Exception {
        File originalFile = new File("1.jpg");
        //获取BufferedImage对象
        BufferedImage originalImage = javax.imageio.ImageIO.read(originalFile);

        int originalWidth = originalImage.getWidth();
        int originalHeight = originalImage.getHeight();
        int thumbnailWidth = originalWidth / 4;
        int thumbnailHeight = originalHeight / 4;

        BufferedImage thumbnailImage = new BufferedImage(thumbnailWidth, thumbnailHeight, BufferedImage.TYPE_INT_RGB);
        thumbnailImage.getGraphics().drawImage(originalImage, 0, 0, thumbnailWidth, thumbnailHeight, null);
        FileOutputStream thumbnailFile = new FileOutputStream("2.jpg");
        JPEGImageEncoder encoder = JPEGCodec.createJPEGEncoder(thumbnailFile);
        encoder.encode(thumbnailImage);
        thumbnailFile.close();
        }
}