java代码绘制生成图片（用于多张图片合成）

package com.test;

import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics2D;
import java.awt.Image;
import java.awt.image.BufferedImage;
import java.io.File;

import javax.imageio.ImageIO;

public class ImageService {

public String background_img;

public String qrcode_img;

public String gzh_img;

public String outputdir;


public File createImage(String name) {
    return overlapImage(background_img, gzh_img,qrcode_img, name, outputdir);
}

public File overlapImage(String backgroundPath, String gzhPath, String qrCodePath, String text, String outPutPath) {
    try {
        // 设置图片大小
         //设置图片大小
        BufferedImage background = resizeImage(848,1018, ImageIO.read(new File(backgroundPath)));
        BufferedImage qrCode = resizeImage(80,80,ImageIO.read(new File(qrCodePath)));
        BufferedImage gzh = resizeImage(80,80,ImageIO.read(new File(gzhPath)));
        Graphics2D g = background.createGraphics();
        g.setColor(Color.black);
        g.setFont(new Font("微软雅黑",Font.PLAIN,40));
        g.drawString(text,436 ,630);
        //在背景图片上添加二维码图片
        g.drawImage(qrCode, 760, 920, qrCode.getWidth(), qrCode.getHeight(), null);
        g.drawImage(gzh, 660, 920, gzh.getWidth(), gzh.getHeight(), null);
        g.dispose();
        File out = new File(outPutPath + System.currentTimeMillis()+".jpg");
        ImageIO.write(background, "jpg", out);
        return out;
    } catch (Exception e) {
        e.printStackTrace();
    }
    return null;
}

public static BufferedImage resizeImage(int x, int y, BufferedImage bfi) {
    BufferedImage bufferedImage = new BufferedImage(x, y, BufferedImage.TYPE_INT_RGB);
    bufferedImage.getGraphics().drawImage(bfi.getScaledInstance(x, y, Image.SCALE_SMOOTH), 0, 0, null);
    return bufferedImage;
}

}