java BufferedImage简单图片写字一个小例子

package com.future.demo; import java.awt.Color; import java.awt.Font; import java.awt.Graphics2D; import java.awt.image.BufferedImage; import java.io.FileNotFoundException; import java.io.FileOutputStream; import java.io.IOException; import javax.imageio.ImageIO; public class BufferedImageDemo { /** * @param args */ public static void main(String[] args) { // TODO Auto-generated method stub //得到图片缓冲区 BufferedImage bi=new BufferedImage(150,70,BufferedImage.TYPE_INT_RGB); //得到它的绘制环境，也就是画笔 Graphics2D g2=(Graphics2D)bi.getGraphics(); g2.setColor(Color.WHITE);//设置颜色 g2.fillRect(0, 0, 150, 70);//填充整张图片,设置背景色 g2.setColor(Color.RED);//设置颜色 g2.drawRect(0,0,150,70); g2.setFont(new Font("黑体",Font.BOLD,15));//设置字体 g2.setColor(Color.BLACK);//设置颜色 g2.drawString("1230", 3, 50); try { ImageIO.write(bi, "JPEG", new FileOutputStream("D:/1.jpg")); } catch (FileNotFoundException e) { // TODO Auto-generated catch block e.printStackTrace(); } catch (IOException e) { // TODO Auto-generated catch block e.printStackTrace(); } } }