public static void main(String[] args){
    
        try  
        {  
            int width = 0;  
            int height = 0;  
            String name="Elisa Zhang";
            String date="SEPTEMBER 1, 2016";
            String intranetId="elisaz@163.com";
            BufferedImage image = ImageIO.read(new File("c:\\Users\\ADMIN\\Desktop\\certification20-1.jpg"));  
            Graphics2D g2d = image.createGraphics();  
            g2d.drawImage(image,0,0,null);
            g2d.setBackground(new Color(255,255,255));  
            g2d.setPaint(new Color(0,0,0));  
            g2d.clearRect(0, 0, width, height);
            g2d.setFont(new Font("Georgia",Font.PLAIN,54));
            int wid= g2d.getFontMetrics().stringWidth(name);
            g2d.drawString(name,image.getWidth()/2-wid/2,280);//居中对齐
            g2d.setFont(new Font("Georgia",Font.ROMAN_BASELINE,9));
            g2d.drawString(date,430,395);
            g2d.dispose();  
            ImageIO.write(image, "jpg", new File("C:/certification/"+intranetId+".jpg"));  
        }  
        catch(Exception ex)  
        {  
            ex.printStackTrace();  
        }   
    }

JAVA awt 绘制图形