package com.ruoyi.service.impl;
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import com.google.zxing.BarcodeFormat;
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import com.google.zxing.EncodeHintType;
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import com.google.zxing.WriterException;
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import com.google.zxing.common.BitMatrix;
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import com.google.zxing.oned.Code128Writer;
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import com.google.zxing.oned.Code39Writer;
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import org.krysalis.barcode4j.impl.code128.Code128Bean;
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import org.krysalis.barcode4j.output.bitmap.BitmapCanvasProvider;
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import org.springframework.stereotype.Service;
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import javax.imageio.ImageIO;
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import java.awt.*;
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import java.awt.image.BufferedImage;
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import java.io.ByteArrayInputStream;
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import java.io.ByteArrayOutputStream;
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import java.io.IOException;
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import java.lang.reflect.Method;
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import java.util.HashMap;
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import java.util.Map;
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@Service
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public class BarcodeService {
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/**
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* 添加文字到条码（优化版本）
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*/
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private void addTextToBarcode(Graphics2D g2d, String text, int width, int barcodeHeight) {
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g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
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g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
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// 使用更清晰的字体
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Font font = new Font("Tahoma", Font.PLAIN, 45);
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g2d.setFont(font);
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g2d.setColor(Color.BLACK);
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// 计算文字位置
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FontMetrics fm = g2d.getFontMetrics();
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int textWidth = fm.stringWidth(text);
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int textHeight = fm.getHeight();
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// 居中对齐
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int x = (width - textWidth) / 2;
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int y = barcodeHeight + textHeight - fm.getDescent(); // 精确垂直居中
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// 绘制文字
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g2d.drawString(text, x, y);
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}
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public byte[] generateBarcodeImage(String barcodeText) {
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try {
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BarcodeFormat format = BarcodeFormat.CODE_39;
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Code39Writer writer = new Code39Writer();
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// 编码参数 - 设置边距为0
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Map<EncodeHintType, Object> hints = new HashMap<>();
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hints.put(EncodeHintType.MARGIN, 0); // 关键：设置边距为0
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// 生成 BitMatrix（纯条码，无文字）
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// 注意：即使设置了MARGIN=0，ZXing可能仍会保留最小边距
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BitMatrix matrix = writer.encode(barcodeText, format, 1300, 141, hints);
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// 方案1.1：直接裁剪白边
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return generateBarcodeWithCroppedMargin(matrix, barcodeText);
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}
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catch (IOException e) {
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throw new RuntimeException("Error generating barcode", e);
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} catch (WriterException e) {
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throw new RuntimeException(e);
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}
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}
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private byte[] generateBarcodeWithCroppedMargin(BitMatrix matrix, String barcodeText) throws IOException {
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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// 找到条码的实际边界
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int left = findLeftBoundary(matrix);
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int right = findRightBoundary(matrix);
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int top = findTopBoundary(matrix);
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int bottom = findBottomBoundary(matrix);
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// 计算条码的实际宽度和高度
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int barcodeWidth = right - left + 1;
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int barcodeHeight = bottom - top + 1;
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// 计算文字区域高度
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int textAreaHeight = 30 + 27;
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// 创建最终图像（精确尺寸）
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BufferedImage finalImage = new BufferedImage(
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barcodeWidth,
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barcodeHeight + textAreaHeight,
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BufferedImage.TYPE_BYTE_BINARY
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);
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Graphics2D g2d = finalImage.createGraphics();
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// 白色背景
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g2d.setColor(Color.WHITE);
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g2d.fillRect(0, 0, barcodeWidth, barcodeHeight + textAreaHeight);
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// 绘制条码（只绘制有效部分）
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g2d.setColor(Color.BLACK);
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for (int x = left; x <= right; x++) {
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for (int y = top; y <= bottom; y++) {
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if (matrix.get(x, y)) {
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g2d.fillRect(x - left, y - top, 1, 1);
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}
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}
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}
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// 添加自定义文字
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addTextToBarcode(g2d, barcodeText, barcodeWidth, barcodeHeight);
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g2d.dispose();
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// 保存
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ByteArrayOutputStream resultStream = new ByteArrayOutputStream();
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ImageIO.write(finalImage, "png", resultStream);
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return resultStream.toByteArray();
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}
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// 辅助方法：找到条码的边界
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private int findLeftBoundary(BitMatrix matrix) {
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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for (int x = 0; x < width; x++) {
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for (int y = 0; y < height; y++) {
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if (matrix.get(x, y)) {
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return x;
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}
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}
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}
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return 0;
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}
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private int findRightBoundary(BitMatrix matrix) {
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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for (int x = width - 1; x >= 0; x--) {
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for (int y = 0; y < height; y++) {
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if (matrix.get(x, y)) {
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return x;
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}
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}
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}
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return width - 1;
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}
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private int findTopBoundary(BitMatrix matrix) {
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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for (int y = 0; y < height; y++) {
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for (int x = 0; x < width; x++) {
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if (matrix.get(x, y)) {
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return y;
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}
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}
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}
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return 0;
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}
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private int findBottomBoundary(BitMatrix matrix) {
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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for (int y = height - 1; y >= 0; y--) {
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for (int x = 0; x < width; x++) {
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if (matrix.get(x, y)) {
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return y;
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}
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}
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}
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return height - 1;
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}
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public byte[] generateBarcodeImage1(String barcodeText) {
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try {
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// 使用 BitMatrix 生成纯条码，不包含任何文字
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BarcodeFormat format = BarcodeFormat.CODE_39; // 根据您的条码类型
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// 创建编码器
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Code39Writer writer = new Code39Writer();
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// 编码参数
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Map<EncodeHintType, Object> hints = new HashMap<>();
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hints.put(EncodeHintType.MARGIN, 0); // 无边框
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// 生成 BitMatrix（纯条码，无文字）
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BitMatrix matrix = writer.encode(barcodeText, format, 1128, 199, hints);
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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// 计算文字区域
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int textAreaHeight = 30 + 10;
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// 创建最终图像
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BufferedImage finalImage = new BufferedImage(
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width,
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height + textAreaHeight,
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BufferedImage.TYPE_BYTE_BINARY
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);
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Graphics2D g2d = finalImage.createGraphics();
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// 白色背景
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g2d.setColor(Color.WHITE);
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g2d.fillRect(0, 0, width, height + textAreaHeight);
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// 绘制条码（从 BitMatrix）
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g2d.setColor(Color.BLACK);
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for (int x = 0; x < width; x++) {
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for (int y = 0; y < height; y++) {
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if (matrix.get(x, y)) {
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g2d.fillRect(x, y, 1, 1);
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}
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}
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}
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// 添加自定义文字
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g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
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g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
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g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
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Font font = new Font("Tahoma", Font.PLAIN, 18);
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g2d.setFont(font);
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FontMetrics fm = g2d.getFontMetrics();
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int textWidth = fm.stringWidth(barcodeText);
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int x = (width - textWidth) / 2;
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int y = height + 30 - 5; // 调整垂直位置
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g2d.drawString(barcodeText, x, y);
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g2d.dispose();
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// 保存
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ByteArrayOutputStream resultStream = new ByteArrayOutputStream();
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ImageIO.write(finalImage, "png", resultStream);
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return resultStream.toByteArray();
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// return outputStream.toByteArray();
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} catch (IOException e) {
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throw new RuntimeException("Error generating barcode", e);
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} catch (WriterException e) {
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throw new RuntimeException(e);
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}
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}
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public byte[] generateBarcodeImageScarn(String barcodeText) {
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try {
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// 使用 BitMatrix 生成纯条码，不包含任何文字
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BarcodeFormat format = BarcodeFormat.CODE_39; // 根据您的条码类型
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// 创建编码器
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Code39Writer writer = new Code39Writer();
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// 编码参数
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Map<EncodeHintType, Object> hints = new HashMap<>();
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hints.put(EncodeHintType.MARGIN, 0); // 无边框
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// 生成 BitMatrix（纯条码，无文字）
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BitMatrix matrix = writer.encode(barcodeText, format, 230, 63, hints);
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int width = matrix.getWidth();
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int height = matrix.getHeight();
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// 计算文字区域
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int textAreaHeight = 30 + 10;
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// 创建最终图像
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BufferedImage finalImage = new BufferedImage(
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width,
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height + textAreaHeight,
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BufferedImage.TYPE_BYTE_BINARY
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);
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Graphics2D g2d = finalImage.createGraphics();
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// 白色背景
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g2d.setColor(Color.WHITE);
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g2d.fillRect(0, 0, width, height + textAreaHeight);
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// 绘制条码（从 BitMatrix）
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g2d.setColor(Color.BLACK);
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for (int x = 0; x < width; x++) {
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for (int y = 0; y < height; y++) {
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if (matrix.get(x, y)) {
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g2d.fillRect(x, y, 1, 1);
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}
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}
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}
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// 添加自定义文字
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g2d.setRenderingHint(RenderingHints.KEY_ANTIALIASING, RenderingHints.VALUE_ANTIALIAS_ON);
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g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_ON);
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g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
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g2d.setRenderingHint(RenderingHints.KEY_STROKE_CONTROL, RenderingHints.VALUE_STROKE_PURE);
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Font font = new Font("Tahoma", Font.PLAIN, 18);
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g2d.setFont(font);
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FontMetrics fm = g2d.getFontMetrics();
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int textWidth = fm.stringWidth(barcodeText);
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int x = (width - textWidth) / 2;
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int y = height + 30 - 5; // 调整垂直位置
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g2d.drawString(barcodeText, x, y);
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g2d.dispose();
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// 保存
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ByteArrayOutputStream resultStream = new ByteArrayOutputStream();
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ImageIO.write(finalImage, "png", resultStream);
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return resultStream.toByteArray();
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// return outputStream.toByteArray();
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} catch (IOException e) {
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throw new RuntimeException("Error generating barcode", e);
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} catch (WriterException e) {
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throw new RuntimeException(e);
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}
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}
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}
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