java生成海报图，包含二维码和昵称等

首先先给大家看下效果图，由于此二维码是能够扫描访问的。所以我给他打码了。

下面再来说说具体实现的过程吧

首先创建一个工具类 PosterUtil

代码语言：javascript复制

private static final String BACKGROUND_IMG = "images/bg.png"; // 背景图片
private static final String result_img = "D:/result.png"; // 最终输出图片
//二维码图片
private static final String destImagePaths="D:/srv/data/static/688daa4b53c64c3aa7de9af95749a775.jpg";

代码语言：javascript复制

public static boolean drawPoster(SmUserinfo smUserinfo,String destImagePaths,String resultImgs){
        try {
            long startTime = System.currentTimeMillis();
// 1. 创建画布
            BufferedImage backgroundImg = ImageIO.read(getInputStream(BACKGROUND_IMG));
            BufferedImage canvas = new BufferedImage(backgroundImg.getWidth(),backgroundImg.getHeight(),BufferedImage.TYPE_INT_RGB);
            Graphics2D g = (Graphics2D) canvas.getGraphics();
// 设置抗锯齿
            g.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB);

            // 2. 将头像设置为圆角
            String avatarImgs=smUserinfo.getHeadId();
            System.out.println("avatarImgs" smUserinfo.getHeadId());
            BufferedImage avatar = ImageIO.read(new URL(avatarImgs));
            int width = 120;
            //透明底的图片
            BufferedImage newAvatar = new BufferedImage(width, width, BufferedImage.TYPE_4BYTE_ABGR);
            Graphics2D graphics = newAvatar.createGraphics();
               //把图片切成一个圓
            {
                graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
                //留一个像素的空白区域，这个很重要，画圆的时候把这个覆盖
                int border = 1;
                //图片是一个圆型
                Ellipse2D.Double shape = new Ellipse2D.Double(border, border, width - border * 2, width - border * 2);
                //需要保留的区域
                graphics.setClip(shape);
                graphics.drawImage(avatar, border, border, width - border * 2, width - border * 2, null);
                graphics.dispose();
            }

            //在圆图外面再画一个圆
            {
                //新创建一个graphics，这样画的圆不会有锯齿
                graphics = newAvatar.createGraphics();
                graphics.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
                int border = 3;
                //画笔是4.5个像素，BasicStroke的使用可以查看下面的参考文档
                //使画笔时基本会像外延伸一定像素，具体可以自己使用的时候测试
                Stroke s = new BasicStroke(4.5F, BasicStroke.CAP_ROUND, BasicStroke.JOIN_ROUND);
                graphics.setStroke(s);
                graphics.setColor(Color.WHITE);
                graphics.drawOval(border, border, width - border * 2, width - border * 2);
                graphics.dispose();
            }

             // 3. 将背景图和头像结合
            // 画背景
            g.drawImage(backgroundImg.getScaledInstance(backgroundImg.getWidth(), backgroundImg.getHeight(), Image.SCALE_DEFAULT), 0, 0, null);
            // 背景上画头像
            g.drawImage(newAvatar.getScaledInstance(150, 150, Image.SCALE_DEFAULT), 90, 160, null);

           // 4. 写字（昵称）
            g.setColor(Color.BLACK);
            g.setFont(new Font("黑体",Font.BOLD,22));
            g.drawString(smUserinfo.getName(), 160, 380);

           // 5. 画字
            g.setColor(new Color(33, 33, 33, 128));
            g.setFont(new Font("宋体",Font.BOLD,18));
            g.drawString(smUserinfo.getJob(), 160, 460);
            // 5. 画字
            g.setColor(new Color(33, 33, 33, 128));
            g.setFont(new Font("宋体",Font.BOLD,18));
            g.drawString(smUserinfo.getPhoneNum(), 160, 510);

            // 5. 画字
            g.setColor(new Color(33, 33, 33, 128));
            g.setFont(new Font("宋体",Font.BOLD,18));
            g.drawString(smUserinfo.getCompanyName(), 160, 570);

            //  画二维码
            String qrCodeUrl=destImagePaths;
            BufferedImage qrCodeUrls = ImageIO.read(new File(qrCodeUrl));
            g.drawImage(qrCodeUrls.getScaledInstance(200,200, Image.SCALE_DEFAULT), 520, 380, null);

            g.dispose();
            File resultImg = new File(resultImgs);
            ImageIO.write(canvas, "png", resultImg);

            System.out.println("生成成功！");
            System.out.println("耗时: "   (System.currentTimeMillis()-startTime)/1000.0   "s");
            System.out.println("生成文件路径: "   resultImg.getAbsolutePath());
            return true;
        }catch (Exception e) {
            e.printStackTrace();
            return false;
        }
    }

代码语言：javascript复制

/**
 * 获取resources下的文件输入流
 */
private static InputStream getInputStream(String fileName) {
    return PosterUtil.class.getClassLoader().getResourceAsStream(fileName);
}

main方法

代码语言：javascript复制

public static void main(String[] args)throws IOException {
    SmUserinfo smUserinfo =new SmUserinfo();
    smUserinfo.setHeadId("http://www.downxia.com/uploadfiles/2018/0616/20180616101015887.jpgn");
    smUserinfo.setName("张三");
    smUserinfo.setJob("销售经理");
    smUserinfo.setPhoneNum("xxxxxx");
    smUserinfo.setCompanyName("思源教育有限公司");
    drawPoster(smUserinfo,destImagePaths,result_img);
}

二维码 工具类

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