PDFBox!一个强大的开源 PDF 处理库

File file = new File("e:/技术架构.pdf") ;try (PDDocument document = Loader.loadPDF(file)) {  PDFTextStripperByArea stripper = new PDFTextStripperByArea();  stripper.setSortByPosition(true);  Rectangle rect = new Rectangle(10, 280, 275, 60);  stripper.addRegion("f-region", rect);  PDPage firstPage = document.getPage(0);  stripper.extractRegions(firstPage);  System.out.println("该区域的文本内容: %s".formatted(rect));  System.out.println(stripper.getTextForRegion("f-region"));}

public static void main(String[] args) throws IOException, XmpParsingException, BadFieldValueException {  File file = new File("e:/技术架构.pdf") ;    try (PDDocument document = Loader.loadPDF(file)) {      PDDocumentCatalog catalog = document.getDocumentCatalog();      PDMetadata meta = catalog.getMetadata();      if (meta != null) {        DomXmpParser xmpParser = new DomXmpParser();        try {          XMPMetadata metadata = xmpParser.parse(meta.toByteArray());          showDublinCoreSchema(metadata);          showAdobePDFSchema(metadata);          showXMPBasicSchema(metadata);        } catch (XmpParsingException e) {          System.err.println("An error occurred when parsing the metadata: " + e.getMessage());        }      } else {        PDDocumentInformation information = document.getDocumentInformation();        if (information != null) {          showDocumentInformation(information);        }      }  }}private static void showXMPBasicSchema(XMPMetadata metadata) {  XMPBasicSchema basic = metadata.getXMPBasicSchema();  if (basic != null) {    display("Create Date:", basic.getCreateDate());    display("Modify Date:", basic.getModifyDate());    display("Creator Tool:", basic.getCreatorTool());  }}private static void showAdobePDFSchema(XMPMetadata metadata) {  AdobePDFSchema pdf = metadata.getAdobePDFSchema();  if (pdf != null) {    display("Keywords:", pdf.getKeywords());    display("PDF Version:", pdf.getPDFVersion());    display("PDF Producer:", pdf.getProducer());  }}private static void showDublinCoreSchema(XMPMetadata metadata) throws BadFieldValueException {  DublinCoreSchema dc = metadata.getDublinCoreSchema();  if (dc != null) {    display("Title:", dc.getTitle());    display("Description:", dc.getDescription());    listString("Creators: ", dc.getCreators());    listCalendar("Dates:", dc.getDates());    listString("Subjects:", dc.getSubjects());  }}private static void showDocumentInformation(PDDocumentInformation information) {  display("Title:", information.getTitle());  display("Subject:", information.getSubject());  display("Author:", information.getAuthor());  display("Creator:", information.getCreator());  display("Producer:", information.getProducer());}private static void listString(String title, List<String> list) {  if (list == null) {    return;  }  System.out.println(title);  for (String string : list) {    System.out.println("  " + string);  }}private static void listCalendar(String title, List<Calendar> list) {  if (list == null) {    return;  }  System.out.println(title);  for (Calendar calendar : list) {    System.out.println("  " + format(calendar));  }}private static String format(Object o) {  if (o instanceof Calendar) {    Calendar cal = (Calendar) o;    return DateFormat.getDateInstance().format(cal.getTime());  } else {    return o.toString();  }}private static void display(String title, Object value) {  if (value != null) {    System.out.println(title + " " + format(value));  }}

public class AddImageToPdf {  public void createPDFFromImage(String inputFile, String imagePath, String outputFile) throws IOException {    try (PDDocument doc = Loader.loadPDF(new File(inputFile))) {      PDPage page = doc.getPage(0);      PDImageXObject pdImage = PDImageXObject.createFromFile(imagePath, doc);      try (PDPageContentStream contentStream = new PDPageContentStream(doc, page, AppendMode.APPEND, true, true)) {        float scale = 1f;        contentStream.drawImage(pdImage, 20, 20, pdImage.getWidth() * scale, pdImage.getHeight() * scale);      }      doc.save(outputFile);    }  }  public static void main(String[] args) throws IOException {    new AddImageToPdf().createPDFFromImage("e:/技术架构.pdf", "d:/images/8.png", "e:/技术架构2.pdf");  }}

File file = new File("e:/技术架构.pdf");try (PDDocument document = Loader.loadPDF(file)) {  PDDocumentCatalog catalog = document.getDocumentCatalog();  XMPMetadata metadata = XMPMetadata.createXMPMetadata();  AdobePDFSchema pdfSchema = metadata.createAndAddAdobePDFSchema();  pdfSchema.setKeywords("技术架构") ;  pdfSchema.setProducer("Pack") ;  XMPBasicSchema basicSchema = metadata.createAndAddXMPBasicSchema();  basicSchema.setModifyDate(Calendar.getInstance());  basicSchema.setCreateDate(Calendar.getInstance());  basicSchema.setCreatorTool("Custom");  basicSchema.setMetadataDate(new GregorianCalendar());  DublinCoreSchema dcSchema = metadata.createAndAddDublinCoreSchema();  dcSchema.setTitle("技术架构");  dcSchema.addCreator("Pack_xg");  dcSchema.setDescription("前后端技术架构");  PDMetadata metadataStream = new PDMetadata(document);  catalog.setMetadata(metadataStream);  XmpSerializer serializer = new XmpSerializer();  ByteArrayOutputStream baos = new ByteArrayOutputStream();  serializer.serialize(metadata, baos, false);  metadataStream.importXMPMetadata(baos.toByteArray());  document.save("e:/技术架构2.pdf");}

try (PDDocument doc = Loader.loadPDF(new File(file))) {  File fontFile = new File("C:/Windows/Fonts/simhei.ttf");    FileInputStream fis = new FileInputStream(fontFile) ;    PDType0Font font = PDType0Font.load(doc, fis, true);    float fontSize = 22.0f;    for (PDPage page : doc.getPages()) {      PDRectangle pageSize = page.getMediaBox();      float stringWidth = font.getStringWidth(message) * fontSize / 1000f;      int rotation = page.getRotation();      boolean rotate = rotation == 90 || rotation == 270;      float pageWidth = rotate ? pageSize.getHeight() : pageSize.getWidth();      float pageHeight = rotate ? pageSize.getWidth() : pageSize.getHeight();      float centerX = rotate ? pageHeight / 2f : (pageWidth - stringWidth) / 2f;      float centerY = rotate ? (pageWidth - stringWidth) / 2f : pageHeight / 2f;      try (PDPageContentStream contentStream = new PDPageContentStream(doc, page, AppendMode.PREPEND, true, true)) {        contentStream.beginText();        contentStream.setFont(font, fontSize);        contentStream.setNonStrokingColor(Color.red);        if (rotate) {          contentStream.setTextMatrix(Matrix.getRotateInstance(Math.PI / 2, centerX, centerY));        } else {          contentStream.setTextMatrix(Matrix.getTranslateInstance(centerX, centerY));        }        contentStream.showText(message);        contentStream.endText();      }    }    doc.save(outfile);  }}public static void main(String[] args) throws IOException {  new AddMessageToEachPage().doIt("e:/技术架构.pdf", "Spring Boot3实战案例300讲", "e:/技术架构2.pdf");}

public static void main(String[] args) throws IOException {  try (PDDocument document = new PDDocument()) {    PDPage page = new PDPage(PDRectangle.A4);    document.addPage(page);    File fontFile = new File("C:/Windows/Fonts/simhei.ttf");    PDFont chineseFont;    try (FileInputStream fis = new FileInputStream(fontFile)) {      chineseFont = PDType0Font.load(document, fis, true);    }    PDResources resources = new PDResources();    resources.put(COSName.getPDFName("SimHei"), chineseFont);    PDAcroForm acroForm = new PDAcroForm(document);    document.getDocumentCatalog().setAcroForm(acroForm);    acroForm.setDefaultResources(resources);    acroForm.setDefaultAppearance("/SimHei 10 Tf 0 0 0 rg");    float pageWidth = PDRectangle.A4.getWidth();    // 表单整体尺寸    float formWidth = 460;    float left = (pageWidth - formWidth) / 2f;    float labelWidth = 130;    float fieldX = left + labelWidth;    float fieldW = formWidth - labelWidth - 10;    // 行距    float rowHeight = 42;    // 顶部起始位置    float baseY = page.getMediaBox().getHeight() - 80;    try (PDPageContentStream cs = new PDPageContentStream(document, page)) {      // 标题      cs.beginText();      cs.setFont(chineseFont, 16);      cs.newLineAtOffset(left, baseY + 10);      cs.showText("用户问卷调查");      cs.endText();      cs.setFont(chineseFont, 11);      // ================== 1 姓名 ==================      drawText(cs, left, baseY, "1. 姓名：");      addTextField(document, acroForm, page, "name", fieldX, baseY - 14, fieldW, 24);      baseY -= rowHeight;      // ================== 2 联系电话 ==================      drawText(cs, left, baseY, "2. 联系电话：");      addTextField(document, acroForm, page, "phone", fieldX, baseY - 14, fieldW, 24);      baseY -= rowHeight;      // ================== 3 年龄 ==================      drawText(cs, left, baseY, "3. 年龄：");      addTextField(document, acroForm, page, "age", fieldX, baseY - 14, fieldW, 24);      baseY -= rowHeight;      // ================== 4 产品满意度意见 ==================      drawText(cs, left, baseY, "4. 产品满意度意见：");      addMultilineField(document, acroForm, page, "satisfyOpinion", fieldX, baseY - 70, fieldW, 60);      baseY -= 88;      // ================== 5 是否愿意继续使用 ==================      drawText(cs, left, baseY, "5. 是否愿意继续使用：");      String yesValue = "愿意";      String noValue = "不愿意";      float checkBoxSize = 18;      float textOffsetY = 4;      // 愿意      addCheckBox(document, acroForm, page, "useYes", fieldX, baseY - 10, checkBoxSize, checkBoxSize);      drawText(cs, fieldX + 22, baseY + textOffsetY, yesValue);      // 不愿意      float noX = fieldX + 90;      addCheckBox(document, acroForm, page, "useNo", noX, baseY - 10, checkBoxSize, checkBoxSize);      drawText(cs, noX + 22, baseY + textOffsetY, noValue);      baseY -= rowHeight;      // ================== 6 其他备注 ==================      drawText(cs, left, baseY, "6. 其他备注：");      addMultilineField(document, acroForm, page, "otherRemark", fieldX, baseY - 70, fieldW, 60);    }    document.save("e:/survey_form.pdf");    System.out.println("问卷表单生成完成：e:/survey_form.pdf");  }}private static void drawText(PDPageContentStream cs, float x, float y, String text) throws IOException {  cs.beginText();  cs.newLineAtOffset(x, y);  cs.showText(text);  cs.endText();}private static PDTextField createTextField(PDAcroForm acroForm, String fieldName, String defaultAppear) {  PDTextField textField = new PDTextField(acroForm);  textField.setPartialName(fieldName);  textField.setDefaultAppearance(defaultAppear);  textField.setQ(PDVariableText.QUADDING_LEFT);  acroForm.getFields().add(textField);  return textField;}private static PDCheckBox createCheckBox(PDAcroForm acroForm, String fieldName) {  PDCheckBox checkBox = new PDCheckBox(acroForm);  checkBox.setPartialName(fieldName);  acroForm.getFields().add(checkBox);  return checkBox;}private static void addTextField(PDDocument doc, PDAcroForm acroForm, PDPage page, String fieldName, float x, float y,    float w, float h) throws IOException {  PDTextField field = createTextField(acroForm, fieldName, "/SimHei 10 Tf 0 0 0 rg");  PDAnnotationWidget widget = field.getWidgets().get(0);  widget.setRectangle(new PDRectangle(x, y, w, h));  widget.setPage(page);  PDAppearanceCharacteristicsDictionary dict = new PDAppearanceCharacteristicsDictionary(new COSDictionary());  dict.setBackground(new PDColor(new float[] { 0.94f, 0.97f, 1.0f }, PDDeviceRGB.INSTANCE));  dict.setBorderColour(new PDColor(new float[] { 0.28f, 0.45f, 0.75f }, PDDeviceRGB.INSTANCE));  widget.setAppearanceCharacteristics(dict);  widget.setPrinted(true);  page.getAnnotations().add(widget);}private static void addMultilineField(PDDocument doc, PDAcroForm acroForm, PDPage page, String fieldName, float x,    float y, float w, float h) throws IOException {  PDTextField field = createTextField(acroForm, fieldName, "/SimHei 10 Tf 0 0 0 rg");  field.setMultiline(true);  PDAnnotationWidget widget = field.getWidgets().get(0);  widget.setRectangle(new PDRectangle(x, y, w, h));  widget.setPage(page);  PDAppearanceCharacteristicsDictionary dict = new PDAppearanceCharacteristicsDictionary(new COSDictionary());  dict.setBackground(new PDColor(new float[] { 0.94f, 0.97f, 1.0f }, PDDeviceRGB.INSTANCE));  dict.setBorderColour(new PDColor(new float[] { 0.28f, 0.45f, 0.75f }, PDDeviceRGB.INSTANCE));  widget.setAppearanceCharacteristics(dict);  widget.setPrinted(true);  page.getAnnotations().add(widget);}private static void addCheckBox(PDDocument doc, PDAcroForm acroForm, PDPage page, String fieldName, float x, float y,    float w, float h) throws IOException {  PDCheckBox checkBox = createCheckBox(acroForm, fieldName);  PDAnnotationWidget widget = checkBox.getWidgets().get(0);  widget.setRectangle(new PDRectangle(x, y, w, h));  widget.setPage(page);  PDAppearanceCharacteristicsDictionary dict = new PDAppearanceCharacteristicsDictionary(new COSDictionary());  dict.setBackground(new PDColor(new float[] { 1, 1, 1 }, PDDeviceRGB.INSTANCE));  dict.setBorderColour(new PDColor(new float[] { 0.3f, 0.3f, 0.3f }, PDDeviceRGB.INSTANCE));  widget.setAppearanceCharacteristics(dict);  widget.setPrinted(true);  page.getAnnotations().add(widget);}

try (PDDocument document = Loader.loadPDF(new File("e:/技术架构.pdf"))) {  PDActionJavaScript javascript = new PDActionJavaScript(      "app.alert( {cMsg: 'PDFBox rocks!', nIcon: 3, nType: 0, cTitle: 'PDFBox Javascript' } );");  document.getDocumentCatalog().setOpenAction(javascript);  if (document.isEncrypted()) {    throw new IOException("Encrypted documents are not supported for this example");  }  document.save("e:/技术架构2.pdf");}

try (PDDocument document = Loader.loadPDF(new File("e:/技术架构.pdf"))) {  PDDocumentOutline outline = new PDDocumentOutline();  document.getDocumentCatalog().setDocumentOutline(outline);  PDOutlineItem pagesOutline = new PDOutlineItem();  pagesOutline.setTitle("前后端技术架构");  outline.addLast(pagesOutline);  int pageNum = 0;  for (PDPage page : document.getPages()) {    pageNum++;    PDPageDestination dest = new PDPageFitWidthDestination();    dest.setPage(page);    PDOutlineItem bookmark = new PDOutlineItem();    bookmark.setDestination(dest);    bookmark.setTitle("Page " + pageNum);    pagesOutline.addLast(bookmark);  }  pagesOutline.openNode();  outline.openNode();  document.getDocumentCatalog().setPageMode(PageMode.USE_OUTLINES);  document.save("e:/技术架构2.pdf");}