Java 生成海报

最近项目有个功能是生成海报

一个背景图片，一个二维码图片

将两个图片合并成一个图片。

写了一个工具类，需要的朋友自取。

@Component
public class PictureUtil {
    /**
     * @param file1Src 在线图片地址1
     * @param file2Src 在线图片地址2
     * @param response
     * @param x
     * @param y
     */
    public void composePic(String file1Src, String file2Src, Integer x, Integer y, HttpServletResponse response) {
        try {
            java.net.URL url = new java.net.URL(file1Src);
            URLConnection conn = url.openConnection();
            InputStream bgFile = conn.getInputStream();
            Image bgSrc = javax.imageio.ImageIO.read(bgFile);

            url = new java.net.URL(file2Src);
            conn = url.openConnection();
            InputStream logoFile = conn.getInputStream();
            Image logoSrc = javax.imageio.ImageIO.read(logoFile);

            int bgWidth = bgSrc.getWidth(null);
            int bgHeight = bgSrc.getHeight(null);
            int logoWidth = logoSrc.getWidth(null);
            int logoHeight = logoSrc.getHeight(null);

            BufferedImage tag = new BufferedImage(bgWidth, bgHeight, BufferedImage.TYPE_INT_RGB);

            Graphics2D g2d = tag.createGraphics();
            g2d.drawImage(bgSrc, 0, 0, bgWidth, bgHeight, null);
            g2d.drawImage(logoSrc, x, y, logoWidth, logoHeight, null);

            ImageIO.write(tag, "png", response.getOutputStream());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

参考：

Java后台通过IO流将文件返回至前端进行预览