参考帖子

 

BufferedImage ImageOne = new BufferedImage(width2, height2,

BufferedImage.TYPE_INT_RGB);

Graphics g = ImageOne.getGraphics();//

g.fillRect(0, 0,width2, height2);

g.setColor(Color.BLACK);

Font mFont = new Font("宋体", Font.PLAIN, 20);

g.setFont(mFont);

//String str = "添加文字测试";

FontMetrics fm = g.getFontMetrics(mFont);

int textWidth = fm.stringWidth(str); //计算文字的宽度

g.drawString(str,(600-textWidth)/2, 100); //文字居中显示

g.drawImage(image,(600-image.getWidth())/2 , 500, null);//将二维码画入大图片中