Java生成二维码并打印二维码和文字信息

1、生成二维码，并调用画布进行二维码和文字的描绘。

2、主程序：获取打印机，并打印内容

3、打印效果

参考文献：

前期工作是安装好打印机驱动，可连接打印机。

添加三个依赖jar：

具体见文底的参考文献。

1、生成二维码，并调用画布进行二维码和文字的描绘。

package print;import java.awt.Color;
import java.awt.Font;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.image.BufferedImage;
import java.awt.print.PageFormat;
import java.awt.print.Printable;
import java.awt.print.PrinterException;
import java.util.HashMap;
import java.util.Map;import com.google.zxing.BarcodeFormat;
import com.google.zxing.EncodeHintType;
import com.google.zxing.MultiFormatWriter;
import com.google.zxing.WriterException;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.qrcode.decoder.ErrorCorrectionLevel;/*** 此类，用于构建打印内容。* @author Administrator**/
public class LabelPrintable implements Printable {private String serNo = "643566786420230921054158";private String f1="45.5";private String f2="46.5";@Overridepublic int print(Graphics graphics, PageFormat pageFormat, int pageIndex) throws PrinterException {if (pageIndex > 0) {return NO_SUCH_PAGE;}Graphics2D g2d = (Graphics2D) graphics;g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());// 绘制二维码BufferedImage img = createImage(serNo);// 将二维码绘制到打印机g2d.drawImage(img, 0, 0, 35, 35, null);// 设置字体大小Font font = new Font("Arial", Font.PLAIN, 7);g2d.setFont(font);// 将文字绘制到打印机g2d.drawString(serNo.substring(0, serNo.length()-14), 40, 7);g2d.drawString(serNo.substring(serNo.length()-14), 40, 16);g2d.drawString("FMAX1:"+f1, 40, 25);g2d.drawString("FMAX5:"+f2, 40, 34);g2d.dispose();return PAGE_EXISTS;}/*** 生成二维码* @param serNo* @return*/private BufferedImage createImage(String serNo) {//图片宽度、高度，二维码和边框的边距//二维码的容错等级Map<EncodeHintType,Object> map = new HashMap<EncodeHintType,Object>();map.put(EncodeHintType.MAX_SIZE, 100);//设置编剧（二维码与图片编剧边框的距离）枚举map.put(EncodeHintType.MARGIN,2);//设置容错的等级 有四级  L（7%） M(15%) Q(25%)  H(30%)map.put(EncodeHintType.ERROR_CORRECTION, ErrorCorrectionLevel.H);//设置字符集，避免中文乱码的情况map.put(EncodeHintType.CHARACTER_SET,"utf-8");//二维码的输出流 IO流MultiFormatWriter mfw = new MultiFormatWriter();try{//通过流创建一个二维矩阵643566786420230921054158BitMatrix bm = mfw.encode(serNo, BarcodeFormat.QR_CODE,400,400,map);//声明一张图片来回值二维码BufferedImage img = new BufferedImage(400,400,BufferedImage.TYPE_INT_BGR);//将二维码的矩阵回值到图片上//重复的做某件事就使用循环结构for (int i = 0; i < 400; i++) {for (int j = 0; j < 400; j++) {//声明一个颜色int rgb = 0;//画矩阵图rgb = bm.get(i,j) ? Color.BLACK.getRGB() : Color.WHITE.getRGB();//将内容绘制到图片中img.setRGB(i,j,rgb);}}//指定二维码的存储路径
//            ImageIO.write(img,"jpg",new File("D:/简书主页.jpg"));System.out.println("二维码生成完成");return img;
//        }catch(WriterException | IOException e){}catch(WriterException e){e.printStackTrace();}return null;}}

画布的核心代码是：

Graphics2D g2d = (Graphics2D) graphics;g2d.translate(pageFormat.getImageableX(), pageFormat.getImageableY());// 绘制二维码BufferedImage img = createImage(serNo);// 将二维码绘制到打印机g2d.drawImage(img, 0, 0, 35, 35, null);// 设置字体大小Font font = new Font("Arial", Font.PLAIN, 7);g2d.setFont(font);// 将文字绘制到打印机g2d.drawString(serNo.substring(0, serNo.length()-14), 40, 7);g2d.drawString(serNo.substring(serNo.length()-14), 40, 16);g2d.drawString("FMAX1:"+f1, 40, 25);g2d.drawString("FMAX5:"+f2, 40, 34);g2d.dispose();

g2d.drawImage(img, 0, 0, 35, 35, null);

以上是将二维码绘制到坐标0.0，图像宽度35、高度35

        // 将文字绘制到打印机g2d.drawString(serNo.substring(0, serNo.length()-14), 40, 7);g2d.drawString(serNo.substring(serNo.length()-14), 40, 16);g2d.drawString("FMAX1:"+f1, 40, 25);g2d.drawString("FMAX5:"+f2, 40, 34);

以上是将四行文字绘制到画布里x坐标40。

以上坐标根据具体情况和打印机进行调整。

2、主程序：获取打印机，并打印内容

package print;import java.awt.print.Printable;
import java.awt.print.PrinterJob;import javax.print.PrintService;
import javax.print.PrintServiceLookup;public class MainPrint {public static void main(String[] args) {try {// 连接到标签打印机PrintService printService = getLabelPrinter();// 创建打印任务PrinterJob printerJob = PrinterJob.getPrinterJob();printerJob.setPrintService(printService);// 设置打印内容Printable printable = new LabelPrintable();printerJob.setPrintable(printable);// 发送打印任务printerJob.print();} catch (Exception e) {e.printStackTrace();}}/*** 查找打印机* @return*/private static PrintService getLabelPrinter() {PrintService[] printServices = PrintServiceLookup.lookupPrintServices(null, null);for (PrintService printService : printServices) {System.out.println(printService.getName());// 查找标签打印机Label PPLBif (printService.getName().contains("Label")) {return printService;}}return null;}}