使用JDK合成照片

　　原图（工程所在目录7098849.jpg）：

　　头像（工程所在目录20181023201750.jpg）：

　　开始合成（执行如下main方法）：

    public static void main(String[] args) throws IOException
    {
        String rootPath = System.getProperty("user.dir");
        String imageUrl = rootPath + File.separator + "7098849.jpg";
        String headUrl = rootPath + File.separator + "20181023201750.jpg";
        String newImageUrl = rootPath + File.separator + "20181023.jpg";
        composePic(newImageUrl,imageUrl,headUrl);
    }

    /**
     * 合成照片
     *
     * @author wulinfeng
     * @param newImageUrl
     * @param imageUrl
     * @param headUrl
     */
    private static void composePic(String newImageUrl, String imageUrl, String headUrl)
    {
        String nickName = "不想下火车的人"; // 昵称
        String color = "230,206,145"; // 昵称颜色
        String font = "思源黑体 CN Normal,1,34"; // 昵称字体
        String pos = "156,70"; // 昵称位置
        String headimg_pos = "40,40"; // 头像位置
        String headimg_size = "88,88"; // 头像大小
        
        BufferedImage srcImg = null;
        BufferedImage headImg = null;
        try
        {
            srcImg = ImageIO.read(new File(imageUrl));
            headImg = ImageIO.read(new File(headUrl));
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        
        if (srcImg == null || headImg == null)
        {
            return;
        }
        
        Graphics2D g = srcImg.createGraphics();
        
        String[] colorArray = color.split(",");
        g.setColor(new Color(Integer.parseInt(colorArray[0]), Integer.parseInt(colorArray[1]),
            Integer.parseInt(colorArray[2])));
        String[] fontArray = font.split(",");
        g.setFont(new Font(fontArray[0], Integer.parseInt(fontArray[1]), Integer.parseInt(fontArray[2])));
        String[] posArray = pos.split(",");
        g.drawString(nickName, Integer.parseInt(posArray[0]), Integer.parseInt(posArray[1]));
        
        String[] headposArray = headimg_pos.split(",");
        String[] headsizeArray = headimg_size.split(",");
        g.drawImage(headImg,
            Integer.parseInt(headposArray[0]),
            Integer.parseInt(headposArray[1]),
            Integer.parseInt(headsizeArray[0]),
            Integer.parseInt(headsizeArray[1]),
            null);
        g.dispose();
        
        try
        {
            FileOutputStream outImgStream = new FileOutputStream(newImageUrl);
            ImageIO.write(srcImg, "jpg", outImgStream);
            outImgStream.flush();
            outImgStream.close();
        }
        catch (IOException e)
        {
            e.printStackTrace();
        }
        
    }

　　合成结果（工程所在目录20181023.jpg）：