[Java]Java awt生成图片示例

有图有真相，先上图：

代码：

import java.awt.BasicStroke;
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 PictureMaker {
    public static void main(String[] args) {
        final int W=200;
        final int H=160;
        BufferedImage img=new BufferedImage(W,H,BufferedImage.TYPE_INT_RGB);
        Graphics2D g2d=(Graphics2D)img.getGraphics();
        
        // 填充矩形
        g2d.setColor(Color.red);
        g2d.fillRect(0, 0, W, H);
        
        // 绘直线
        g2d.setColor(Color.yellow);
        g2d.setStroke(new BasicStroke(2.0f));
        g2d.drawLine(20, H/2+10, W-20, H/2+10);
        
        // 绘文字
        g2d.setFont(new Font("宋体",Font.BOLD,24));
        g2d.drawString("2022新年快乐",26, H/2);
        
        g2d.dispose();// g2d使命完成
        
        try {
            // 输出到文件
            ImageIO.write(img, "PNG", new FileOutputStream("c:\\hy\\1.PNG"));
        } catch (FileNotFoundException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IOException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
    }
}

END