java之运用ImageI为图片添加logo水印

拼搏现实的明天。 2023-09-23 21:33 67阅读 0赞

# java为图片添加logo水印 #

这里使用了ImageIO图像流 技术

public static void main(String[] args) throws IOException {
        
     logowater(new File("F:/download/logo/baidu.png"),
               new File("F:/download/壁纸/222/599379.jpg"),
               new File("F:/download/tu"));
    }
    public static void logowater(File logo, File src, File dst) throws IOException {
        
        //加载图标
        BufferedImage lg = ImageIO.read(logo);
        int lw = lg.getWidth();
        int lh = lg.getHeight();
        //加载图像
        BufferedImage image = ImageIO.read(src);
        int iw = image.getWidth();
        int ih = image.getHeight();
        Random random = new Random();
        Graphics2D g = image.createGraphics();
        //设置线条和文件的，抗锯齿（平滑）
        g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_GASP);
        g.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);
        int x = 0;
        int y = 0;
        //左上
        x = 10;
        y = 10;
        //中间
        x = (iw - lw) / 2;
        y = (ih - lh) / 2;
        //随机加位置logo
        x = (random.nextInt(10, iw - lw - 10));
        y = (random.nextInt(10, ih - lh - 10));
        //设置logo的透明度
        g.setComposite(AlphaComposite.getInstance(AlphaComposite.SRC_ATOP, .3f));
        //设置logo的位置   还可以调整logo的大小比例  eg：lw+100 那么lh就必须是(lh+(int)(lh*100/lw))这样放置比例失调
        //正常图标
        //g.drawImage(lg,x,y,lw,lh,null);
        //缩小图标
        //g.drawImage(lg,x,y,lw-50,lh-((int)(lh*50)/lw),null);
        //放大图标
        g.drawImage(lg, x, y, lw + 300, lh + ((int) (lh * 300 / lw)), null);
        g.dispose();
        ImageIO.write(image, "png", new File(dst, UUID.randomUUID() + ".png"));
    }

原图：

![599379][]  
添加放大的logo图：  
![在这里插入图片描述][30eee7dc775c42bc96b01731db80cd12.png]

[599379]: https://img-blog.csdnimg.cn/img_convert/de89e8be149891a92d25320b7b3e9d9c.jpeg
[30eee7dc775c42bc96b01731db80cd12.png]: https://img-blog.csdnimg.cn/30eee7dc775c42bc96b01731db80cd12.png