图片合成工具类

import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import java.util.Hashtable;

import static com.google.zxing.client.j2se.MatrixToImageConfig.BLACK;
import static com.google.zxing.client.j2se.MatrixToImageConfig.WHITE;

/**
 * Desc: 图片生成工具类
 */
public class ImageUtil {

    private final static Logger logger = LoggerFactory.getLogger(ImageUtil.class);

    /**
     * 二维码生成方法
     *
     * @param content 二维码条码内容
     * @param width   二维码宽
     * @param height  二维码高
     * @return BufferedImage
     * @throws Exception
     */
    public static BufferedImage QrCodeImage(String content, int width, int height) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);  //矫错级别
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.MARGIN, 1);
        //创建比特矩阵（位矩阵）的QR码编码的字符串
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.QR_CODE, width, height, hints);
        //使Buffered勾画QRCode（matrixWidth是行二维码像素点）
        int matrixWidth = bitMatrix.getWidth();
        int martrixHeight = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(matrixWidth, martrixHeight, BufferedImage.TYPE_INT_RGB);
        for (int x = 0; x < matrixWidth; x++) {
            for (int y = 0; y < martrixHeight; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? 0xFF000000 : 0xFFFFFFFF);
            }
        }
        return image;
    }

    /**
     * 条形码生成方法
     *
     * @param content 生成条码的内容
     * @param width   条码高度
     * @param height  条码高度
     * @return BufferedImage
     * @throws Exception
     */
    public static BufferedImage barcodeImage(String content, int width, int height) throws Exception {
        Hashtable<EncodeHintType, Object> hints = new Hashtable<>();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);  //矫错级别
        hints.put(EncodeHintType.CHARACTER_SET, "utf-8");
        hints.put(EncodeHintType.MARGIN, 1);
        int codeWidth = 3 + (7 * 6) + 5 + (7 * 6) + 3;
        codeWidth = Math.max(codeWidth, width);
        BitMatrix bitMatrix = new MultiFormatWriter().encode(content, BarcodeFormat.CODE_128, codeWidth, height, hints);
        int matrixWidth = bitMatrix.getWidth();
        int martrixHeight = bitMatrix.getHeight();
        BufferedImage image = new BufferedImage(matrixWidth, martrixHeight, BufferedImage.TYPE_INT_ARGB);
        for (int x = 0; x < matrixWidth; x++) {
            for (int y = 0; y < martrixHeight; y++) {
                image.setRGB(x, y, bitMatrix.get(x, y) ? BLACK : WHITE);
            }
        }
        return image;
    }

    /**
     * 合成图片
     *
     * @param qrCode  二维码图片
     * @param barcode 条码图片
     * @param content 填写的内容
     * @param path    图片临时存放目录
     * @return File
     * @throws IOException
     */
    public static File distmemberImage(BufferedImage qrCode, BufferedImage barcode, String content, String path) throws IOException {
        File file = null;
        try {
            BufferedImage img = new BufferedImage(600, 800, BufferedImage.TYPE_INT_RGB);//创建背景图片
            Graphics2D g = (Graphics2D) img.getGraphics();//开启画图
            g.setBackground(Color.WHITE);    //设置背景色
            g.clearRect(0, 0, 600, 800);//通过使用当前绘图表面的背景色进行填充来清除指定的矩形。

            //读取本地图片
//        BufferedImage bg = ImageIO.read(new File("C:\\Users\\Administrator.N1I11YAE7VJWQJS\\Desktop\\2.jpg"));//读取本地图片
//        BufferedImage logo = ImageIO.read(new URL("http://a.hiphotos.baidu.com/image/pic/item/96dda144ad3459825a7754f50ef431adcaef84dc.jpg"));//读取互联网图片
//        g.drawImage(bg.getScaledInstance(533,800, Image.SCALE_DEFAULT), 0, 0, null); // 绘制缩小后的图

            //在图片上写字
            g.setColor(Color.black);
            g.setFont(new Font("宋体", Font.BOLD, 30));
            g.drawString(content, 150, 100);//绘制文字
            g.drawString("请使用扫码枪扫描识别身份", 110, 160);//绘制文字

            //合成图片
            g.drawImage(barcode, 50, 200, null);  // 绘制缩小后的图
            g.drawImage(qrCode, 120, 370, null);  // 绘制缩小后的图

            //在图片上写字
            g.setColor(Color.black);
            g.setFont(new Font("宋体", Font.BOLD, 25));
            g.drawString("请使用微信扫码领劵", 180, 750);//绘制文字
            g.dispose();   //画完记得关闭g

            //最后写到本地图片
            file = new File(path);
            ImageIO.write(img, "jpg", file);
            return file;
        } catch (Exception e) {
            logger.error("生成促销员二维码图片异常, content={}", content, e);
        }
        return file;
    }

}