Java如何实现批量打印条形码

PrinterJob job = PrinterJob.getPrinterJob(); job.setPrintable(printable, pageFormat); if(job.printDialog()) job.print();

import com.google.zxing.*;
import com.google.zxing.common.BitMatrix;
import com.google.zxing.oned.Code128Writer;
import javax.imageio.ImageIO;
import java.awt.*;
import java.awt.image.BufferedImage;
import java.awt.print.*;
import java.io.*;
import java.util.*;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
 
public class BatchBarcodePrinter implements Printable {
    private static final Logger logger = LoggerFactory.getLogger(BatchBarcodePrinter.class);
 
    private List<String> codes;         // 待打印内容
    private Properties config;          // 布局及条码配置
    private List<BufferedImage> images; // 生成的条码图像列表
    private int cols, rows;             // 每页列数和行数
    private int imgWidth, imgHeight;    // 条码图像尺寸
    private int marginX, marginY;       // 页面边距
    private int gapX, gapY;             // 图像间隔
 
    public BatchBarcodePrinter(List<String> codes, Properties cfg) throws Exception {
        this.codes = codes;
        this.config = cfg;
        loadConfig();
        generateImages();
    }
 
    // 读取配置
    private void loadConfig() {
        cols       = Integer.parseInt(config.getProperty("page.cols", "2"));
        rows       = Integer.parseInt(config.getProperty("page.rows", "5"));
        imgWidth   = Integer.parseInt(config.getProperty("barcode.width", "200"));
        imgHeight  = Integer.parseInt(config.getProperty("barcode.height", "80"));
        marginX    = Integer.parseInt(config.getProperty("page.marginX", "50"));
        marginY    = Integer.parseInt(config.getProperty("page.marginY", "50"));
        gapX       = Integer.parseInt(config.getProperty("page.gapX", "20"));
        gapY       = Integer.parseInt(config.getProperty("page.gapY", "30"));
    }
 
    // 生成所有条码图像
    private void generateImages() {
        images = new ArrayList<>();
        Code128Writer writer = new Code128Writer();
        for (String code : codes) {
            try {
                BitMatrix bm = writer.encode(code, BarcodeFormat.CODE_128, imgWidth, imgHeight);
                BufferedImage img = new BufferedImage(imgWidth, imgHeight + 20, BufferedImage.TYPE_INT_RGB);
                Graphics2D g = img.createGraphics();
                g.setColor(Color.WHITE);
                g.fillRect(0, 0, img.getWidth(), img.getHeight());
                // 绘制条码
                for (int x = 0; x < imgWidth; x++) {
                    for (int y = 0; y < imgHeight; y++) {
                        g.setColor(bm.get(x, y) ? Color.BLACK : Color.WHITE);
                        g.fillRect(x, y, 1, 1);
                    }
                }
                // 绘制文本
                g.setColor(Color.BLACK);
                g.setFont(new Font("Monospaced", Font.PLAIN, 14));
                FontMetrics fm = g.getFontMetrics();
                int tx = (imgWidth - fm.stringWidth(code)) / 2;
                g.drawString(code, tx, imgHeight + fm.getAscent());
                g.dispose();
                images.add(img);
            } catch (Exception e) {
                logger.error("生成条码失败: {}", code, e);
            }
        }
    }
 
    @Override
    public int print(Graphics graphics, PageFormat pf, int pageIndex) {
        int perPage = cols * rows;
        int start = pageIndex * perPage;
        if (start >= images.size()) return NO_SUCH_PAGE;
        Graphics2D g = (Graphics2D) graphics;
        g.translate(pf.getImageableX(), pf.getImageableY());
        int x0 = marginX, y0 = marginY;
        // 绘制本页条码
        for (int i = 0; i < perPage; i++) {
            int idx = start + i;
            if (idx >= images.size()) break;
            int row = i / cols, col = i % cols;
            int x = x0 + col * (imgWidth + gapX);
            int y = y0 + row * (imgHeight + gapY + 20);
            g.drawImage(images.get(idx), x, y, null);
        }
        return PAGE_EXISTS;
    }
 
    // 启动打印
    public void printAll() throws PrinterException {
        PrinterJob job = PrinterJob.getPrinterJob();
        job.setPrintable(this);
        if (job.printDialog()) {
            job.print();
        }
    }
 
    public static void main(String[] args) throws Exception {
        // 1. 加载待打印数据
        List<String> codes = new ArrayList<>();
        try (BufferedReader br = new BufferedReader(new FileReader("codes.csv"))) {
            String line;
            while ((line = br.readLine()) != null) {
                if (!line.trim().isEmpty()) codes.add(line.trim());
            }
        }
        // 2. 加载配置
        Properties cfg = new Properties();
        try (InputStream in = new FileInputStream("config.properties")) {
            cfg.load(in);
        }
        // 3. 批量打印
        BatchBarcodePrinter printer = new BatchBarcodePrinter(codes, cfg);
        printer.printAll();
    }
}