import com.jhlabs.image.GaussianFilter; import org.apache.pdfbox.pdmodel.PDDocument; import org.apache.pdfbox.rendering.ImageType; import org.apache.pdfbox.rendering.PDFRenderer; import org.apache.pdfbox.text.PDFTextStripper; import org.apache.pdfbox.text.TextPosition; import javax.imageio.IIOImage; import javax.imageio.ImageIO; import javax.imageio.ImageWriteParam; import javax.imageio.ImageWriter; import javax.imageio.stream.ImageOutputStream; import java.awt.*; import java.awt.image.BufferedImage; import java.io.File; import java.io.IOException; import java.util.ArrayList; import java.util.Iterator; import java.util.LinkedList; import java.util.List; import java.util.regex.Matcher; import java.util.regex.Pattern; public class bjbdtest { private static final Pattern BARCODE_PATTERN = Pattern.compile("(条形码|条\\s*码)[:：]?\\s*(\\d{10,20})"); // 测试示例 public static void main(String[] args) { String path = "D:\\集中打印\\pdf"; // 替换为实际路径，例如 "C:/Users/YourName/Documents" try { List<File> pdfFiles = findPDFFiles(path); System.out.println("找到 " + pdfFiles.size() + " 个 PDF 文件:"); for (File pdf : pdfFiles) { System.out.println(pdf.getAbsolutePath()); } // 2. 处理每个PDF文件 // for (File pdfFile : pdfFiles) { // System.out.println("\n处理文件: " + pdfFile.getName()); // System.out.println("文件路径: " + pdfFile.getAbsolutePath()); // // // 3. 提取文本内容 // String content = extractTextFromPDF(pdfFile); // // // 4. 输出前200个字符作为预览 // int previewLength = Math.min(200, content.length()); // String preview = content.substring(0, previewLength).replaceAll("\\s+", " "); // System.out.println("内容预览: " + preview + (content.length() > 200 ? "..." : "")); // // // 5. 可选：保存完整内容到文件 // // saveContentToFile(pdfFile, content); // } System.out.println("\n处理文件: " + pdfFiles.get(0).getName()); System.out.println("文件路径: " + pdfFiles.get(0).getAbsolutePath()); // 3. 提取文本内容 String content = extractTextFromPDF(pdfFiles.get(0)); String barcode = extractBarcode(content)+"03"; //pdf 转 jpg File jpgFile = pdfToHighQualityImage( pdfFiles.get(0), "D:\\集中打印\\pdf\\" + barcode ); // 4. 输出前200个字符作为预览 System.out.println(barcode); int previewLength = Math.min(30, content.length()); String preview = content.substring(0, previewLength).replaceAll("\\s+", " "); System.out.println("内容预览: " + preview + (content.length() > 30 ? "..." : "")); } catch (IllegalArgumentException e) { System.err.println("错误: " + e.getMessage()); } catch (Exception e) { throw new RuntimeException(e); } } public static File pdfToHighQualityImage(File pdfFile, String outputPath) throws IOException { // 系统级字体渲染优化 System.setProperty("sun.java2d.cmm", "sun.java2d.cmm.kcms.KcmsServiceProvider"); System.setProperty("org.apache.pdfbox.rendering.UsePureJavaCMYK", "true"); File outputFile = new File(outputPath + ".jpg"); try (PDDocument document = PDDocument.load(pdfFile)) { PDFRenderer renderer = new OptimizedPDFRenderer(document); // 仅处理第一页（如需多页可修改循环） BufferedImage image = renderer.renderImageWithDPI(0, 350, ImageType.RGB); // 高级图像后处理 BufferedImage optimizedImage = applyAdvancedProcessing(image); // 保存为高质量JPEG saveAsJpeg(optimizedImage, outputFile, 0.92f); // 92%质量 } return outputFile; } // 自定义渲染器优化字体处理 private static class OptimizedPDFRenderer extends PDFRenderer { public OptimizedPDFRenderer(PDDocument document) { super(document); setSubsamplingAllowed(true); } } // 高级图像处理流程 private static BufferedImage applyAdvancedProcessing(BufferedImage source) { BufferedImage result = new BufferedImage( source.getWidth(), source.getHeight(), BufferedImage.TYPE_INT_RGB); Graphics2D g2d = result.createGraphics(); // 精细化的抗锯齿设置 g2d.setRenderingHint(RenderingHints.KEY_TEXT_ANTIALIASING, RenderingHints.VALUE_TEXT_ANTIALIAS_LCD_HRGB); g2d.setRenderingHint(RenderingHints.KEY_FRACTIONALMETRICS, RenderingHints.VALUE_FRACTIONALMETRICS_ON); g2d.setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY); // 轻微减轻字体权重 g2d.setComposite(AlphaComposite.SrcOver.derive(0.98f)); g2d.drawImage(source, 0, 0, null); // 边缘锐化处理 result = applyUnsharpMask(result, 0.7f); g2d.dispose(); return result; } // 高质量JPEG保存 private static void saveAsJpeg(BufferedImage image, File output, float quality) throws IOException { Iterator<ImageWriter> writers = ImageIO.getImageWritersByFormatName("jpg"); ImageWriter writer = writers.next(); try (ImageOutputStream ios = ImageIO.createImageOutputStream(output)) { writer.setOutput(ios); ImageWriteParam param = writer.getDefaultWriteParam(); param.setCompressionMode(ImageWriteParam.MODE_EXPLICIT); param.setCompressionQuality(quality); writer.write(null, new IIOImage(image, null, null), param); } writer.dispose(); } // 反锐化掩模算法（减轻加粗效果） private static BufferedImage applyUnsharpMask(BufferedImage image, float amount) { BufferedImage blurred = new BufferedImage( image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB); // 创建轻微模糊版本 Graphics2D g = blurred.createGraphics(); g.drawImage(image, 0, 0, null); g.dispose(); blurred = new GaussianFilter(1.2f).filter(blurred, null); // 应用反锐化掩模 BufferedImage result = new BufferedImage( image.getWidth(), image.getHeight(), BufferedImage.TYPE_INT_RGB); for (int y = 0; y < image.getHeight(); y++) { for (int x = 0; x < image.getWidth(); x++) { int original = image.getRGB(x, y); int blur = blurred.getRGB(x, y); // 计算差值并混合 int deltaR = ((original >> 16) & 0xFF) - ((blur >> 16) & 0xFF); int deltaG = ((original >> 8) & 0xFF) - ((blur >> 8) & 0xFF); int deltaB = (original & 0xFF) - (blur & 0xFF); int newR = clamp((int)(((original >> 16) & 0xFF) + amount * deltaR)); int newG = clamp((int)(((original >> 8) & 0xFF) + amount * deltaG)); int newB = clamp((int)((original & 0xFF) + amount * deltaB)); result.setRGB(x, y, (newR << 16) | (newG << 8) | newB); } } return result; } private static int clamp(int value) { return Math.max(0, Math.min(255, value)); } // 同上文的extractBarcode方法 public static String extractBarcode(String text) { Pattern pattern = Pattern.compile(String.valueOf(BARCODE_PATTERN)); Matcher matcher = pattern.matcher(text); return matcher.find() ? matcher.group(2) : null; } /** * 提取PDF文件中的文本内容 * @param pdfFile PDF文件 * @return 提取的文本内容 */ public static String extractTextFromPDF(File pdfFile) { try (PDDocument document = PDDocument.load(pdfFile)) { // 1. 配置文本提取器 PDFTextStripper stripper = new PDFTextStripper() { @Override protected void processTextPosition(TextPosition text) { // 直接提取Unicode字符，避免字体问题 try { String unicode = text.getUnicode(); if (!unicode.isEmpty() && !unicode.matches("\\s")) { writeString(unicode); } } catch (IOException e) { throw new RuntimeException("文本提取失败", e); } } }; // 2. 设置提取参数 stripper.setSortByPosition(true); // 按物理位置排序 stripper.setShouldSeparateByBeads(false); stripper.setAddMoreFormatting(false); // 禁用自动格式化 // 3. 提取并清理结果 String rawText = stripper.getText(document); return cleanExtractedText(rawText); } catch (Exception e) { System.err.println("PDF处理错误: " + e.getMessage()); return ""; } } /** * 清理提取的文本（合并空格、移除无效字符） */ private static String cleanExtractedText(String text) { return text.replaceAll("[\\r\\n]+", "\n") // 合并换行 .replaceAll("[\\s]{2,}", " ") // 合并空格 .replaceAll("[\\x00-\\x1F]", ""); // 移除控制字符 } /** * 获取指定目录下所有 PDF 文件（包括子文件夹） * @param directoryPath 文件夹路径（例如："C:/Documents"） * @return PDF 文件列表 * @throws IllegalArgumentException 如果路径无效 */ public static List<File> findPDFFiles(String directoryPath) { File rootDir = new File(directoryPath); // 检查路径有效性 if (!rootDir.exists()) { throw new IllegalArgumentException("路径不存在: " + directoryPath); } if (!rootDir.isDirectory()) { throw new IllegalArgumentException("路径不是文件夹: " + directoryPath); } List<File> pdfFiles = new ArrayList<>(); LinkedList<File> queue = new LinkedList<>(); queue.add(rootDir); // 广度优先遍历文件夹（参考引用[2]方法） while (!queue.isEmpty()) { File currentDir = queue.removeFirst(); File[] files = currentDir.listFiles(); if (files != null) { for (File file : files) { if (file.isDirectory()) { queue.add(file); // 添加子文件夹到队列 } else if (file.isFile() && isPDFFile(file)) { pdfFiles.add(file); // 收集 PDF 文件 } } } } return pdfFiles; } // 检查文件是否为 PDF（基于扩展名） private static boolean isPDFFile(File file) { String fileName = file.getName().toLowerCase(); return fileName.endsWith(".pdf"); } } 转换成图片后没有加粗的字体变的加粗了 字体有可能改变了