Java 基于Graphics2D绘制电子收据图片

接到一个生成电子收据的需求,网上无模板,得自行设计

参考了 这篇文章 https://blog.csdn.net/qq_26212181/article/details/97621758 

生成二维码的代码,网上也有很多例子。

难度其实不大,但调整样式比较费时,贴出来让大家参考绘制。

package xxx.service.impl;
import com.github.binarywang.utils.qrcode.MatrixToImageWriter;
import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.QRCodeWriter;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;
import lombok.SneakyThrows;
import org.apache.shiro.SecurityUtils;
import org.jeecg.common.system.vo.LoginUser;
import org.jeecg.common.util.CommonUtils;
import org.junit.Test;
import org.springframework.stereotype.Service;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.io.*;
import java.util.Hashtable;/**
 * @Description: 电子票据表
 * @Author: jeecg-boot
 * @Date:   2021-01-25
 * @Version: V1.0
 */
@Service
public class DemoServiceImpl{

    @SneakyThrows
    @Test
    public void main() throws FileNotFoundException, IOException {
        String id = IdUtilWorker.IdUtil();//随机字符,这里是用雪花算法生成的字符串id
        int rowheight = 45;//行高
        int startHeight = 50;//余留上方像素
        int startWidth = 15;//余留左方像素
        int imageHeight = 360;
        int imageWidth =950;
        //得到图片缓冲区
        BufferedImage bi = new BufferedImage(imageWidth,imageHeight,BufferedImage.TYPE_INT_RGB);//INT精确度达到一定,RGB三原色,高度70,宽度150

        //得到它的绘制环境(这张图片的笔)
        //Graphics2D g2 = (Graphics2D) bi.getGraphics();

        Graphics2D g2 =bi.createGraphics();
        //设置颜色
        g2.setColor(Color.WHITE);
        g2.fillRect(0,0,imageWidth,imageHeight);//填充整张图片(其实就是设置背景颜色)

        //画横线
        for (int j = 0; j < 5; j++) {
            g2.setColor(Color.darkGray);
            g2.drawLine(startWidth, startHeight + (j + 1) * rowheight, imageWidth - 15,
                    startHeight + (j + 1) * rowheight);
        }
        // 画竖线
        int rightLine;
        g2.setColor(Color.gray);
        for (int k = 0; k < 2; k++) {
            rightLine = startWidth + k * (imageWidth - startWidth * 2 );
            g2.drawLine(rightLine, startHeight + rowheight, rightLine,
                    startHeight + 5 * rowheight);
        }
        g2.setColor(Color.BLACK);//设置背景颜色
        //插入二维码
        byte[] qrCode = getQRCodeImage(id,60,60);
        InputStream buffIn = new ByteArrayInputStream(qrCode, 0, qrCode.length);
        Image  bufferedImage =(Image) ImageIO.read(buffIn);
        g2.drawImage(bufferedImage,startWidth,10,null); //向图片左上插入二维码
        g2.setFont(new Font("黑体",Font.BOLD,20)); //设置字体:字体、字号、大小
        g2.drawString("XX有限责任公司收款收据      NO.", startWidth*19, rowheight);

        //以上画好了底图,开始插入票据信息

        g2.setFont(new Font("宋体", Font.CENTER_BASELINE, 14));
        //表头填充
        g2.drawString("0408601", imageWidth-startWidth*8, rowheight);
        g2.drawString("合同号:20210203xxxxxxxx", startWidth, startHeight+rowheight-3);
        g2.drawString("日期:  2021年2月3日",imageWidth - startWidth * 13, startHeight+rowheight-3);
        //调整字体
        g2.setFont(new Font("宋体", Font.CENTER_BASELINE, 17));
        //第一行填充
        g2.drawString("今日收到 张三 交来 解放路53号安居苑3栋1单元2048号 住宅保证金",startWidth*2, startHeight+rowheight*2-10);
        //第二行填充
        g2.drawString("¥:  790",imageWidth - startWidth * 13, startHeight+rowheight*3-10);
        //第三行填充
        g2.drawString("备注:  测试生成电子票据",startWidth*2, startHeight+rowheight*4-10);
        //第四行填充
        g2.drawString("缴费方式: 刷卡( )  转账( )  支付宝(●)  微信( )  现金( ) ",startWidth*2, startHeight+rowheight*5-10);
        //底部填充
        g2.drawString("开票单位(盖章有效)",startWidth*2, startHeight+rowheight*6-20);
        g2.drawString("开票人:韩梅梅",startWidth*25, startHeight+rowheight*6-20);
        g2.drawString("承租人(签名)",startWidth*50, startHeight+rowheight*6-20);
        //调整字体
        g2.setFont(new Font("宋体", Font.BOLD, 18));
        g2.drawString("人民币(大写):  漆佰玖拾圆整",startWidth*2, startHeight+rowheight*3-10);//第二行大写金额需要加粗,所以放在最后
        //因为2D画图画字体会有锯齿,而graphics2D类有抗锯齿和画笔柔顺的开关,设置如下
        g2.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
        g2.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_DEFAULT);
        g2.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
        Stroke s = new BasicStroke(imageWidth, BasicStroke.CAP_ROUND, BasicStroke.JOIN_MITER);
        g2.setStroke(s);

        ImageIO.write(bi,"JPEG",new FileOutputStream("F:/codeCreateIMG/a"+id+".jpg"));//保存图片 JPEG表示保存格式
     //释放内存,解决文件占用问题
     bi.getGraphics().dispose();
     bi=null;
     System.gc();
    }

    //生成二维码
    // 编码格式
    private static final String CHARSET = "utf-8";
    private byte[] getQRCodeImage(String text, int width, int height) throws WriterException, IOException {
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);
        hints.put(EncodeHintType.CHARACTER_SET, CHARSET);
        hints.put(EncodeHintType.MARGIN, 1);
        QRCodeWriter qrCodeWriter = new QRCodeWriter();
        BitMatrix bitMatrix = qrCodeWriter.encode(text, BarcodeFormat.QR_CODE, width, height, hints);
        ByteArrayOutputStream pngOutputStream = new ByteArrayOutputStream();
        MatrixToImageWriter.writeToStream(bitMatrix, "PNG", pngOutputStream);
        byte[] pngData = pngOutputStream.toByteArray();
        return pngData;
    }


}

 

生成的效果如下:

 

posted @ 2021-02-03 17:53  家伙L  阅读(824)  评论(0编辑  收藏  举报