新功能
Contents
[
Hide
]
Aspose.PDF 25.12 的新功能
XFDF 中任意旋转的自由文本批注
已为 XFDF 中的自由文本批注添加任意旋转角度的支持，使导入和导出的批注布局更加灵活。
Document pdfDocument = new Document(inputPdf);
com.aspose.pdf.facades.PdfAnnotationEditor editor = new PdfAnnotationEditor();
editor.bindPdf(pdfDocument);
editor.importAnnotationsFromXfdf(inputXfdf);
editor.save(output);
Aspose.PDF 25.11 的新功能
隐藏数据清理改进
现在可以通过 HiddenDataSanitizer 实现增强的 PDF 清理，以更好地删除文档中的隐藏内容。
Document document = new Document(pdfFile);
try
{
HiddenDataSanitizationOptions options = HiddenDataSanitizationOptions.all();
ImageCompressionOptions tmp = new ImageCompressionOptions();
tmp.setMaxResolution(30);
tmp.setResizeImages(true);
tmp.setCompressImages(true);
options.setImageCompressionOptions(tmp);
HiddenDataSanitizer sanitizer = new HiddenDataSanitizer(options);
sanitizer.sanitize(document);
document.save(getOutputPath("clear_all_resize_img.pdf"));
}
finally
{
document.close();
}
PDF 优化期间文件大小减小改进
PDF 优化现在通过改进字体子集处理方式来提升文件大小的减小效果。
Document document = new Document(inputPath);
try {
OptimizationOptions tmp = new OptimizationOptions();
tmp.setSubsetFonts(true);
tmp.setAllowReusePageContent(true);
tmp.setCompressObjects(true);
tmp.setLinkDuplicateStreams(true);
tmp.setRemoveUnusedObjects(true);
tmp.setRemoveUnusedStreams(true);
tmp.setCompressAllContentStreams(true);
OptimizationOptions optimizeOptions = tmp;
document.optimizeResources(optimizeOptions);
document.save(outputPath);
} finally {
document.close();
}
Aspose.PDF 25.10 的新功能
PDF 转 PDF/E 转换支持
Aspose.PDF for Java 现在支持将 PDF 文档转换为 PDF/E 格式。
Document document = new Document(inputPdf);
document.convert(conversionLog, PdfFormat.PDF_E_1, ConvertErrorAction.Delete);
document.save(outputPdf);
注释中的 HTML 文本
已添加对在注释中添加 HTML 文本的支持。
Document pdf = new Document();
Page page = pdf.getPages().add();
DefaultAppearance da = new DefaultAppearance("Arial", 12, java.awt.Color.BLACK);
FreeTextAnnotation freeTextAnnot = new FreeTextAnnotation(page, new Rectangle(100, 600, 500, 700),
da);
freeTextAnnot.setRichText("<?xml version=\"1.0\"?><body xmlns=\"http://www.w3.org/1999/xhtml\" "
+ "xmlns:xfa=\"http://www.xfa.org/schema/xfa-data/1.0/\\\" xfa:APIVersion=\"Acrobat:11.0.23\" "
+ "xfa:spec=\"2.0.2\" style=\"font-size:12.0pt;color:#00eeff;font-weight:normal;font-style:normal;"
+ "font-family:Arial;font-stretch:normal\"><p dir=\"ltr\">1<p style=\"color:#00ff00;"
+ "font-style:italic\">2</p>3456</p></body>");
freeTextAnnot.getTextStyle().setColor(java.awt.Color.BLACK);
freeTextAnnot.getTextStyle().setFontName("Arial");
//freeTextAnnot.Contents = "This is a rich text";
freeTextAnnot.setModified(new Date());
freeTextAnnot.setColor(Color.getRed());
freeTextAnnot.getBorder().setWidth(0);
page.getAnnotations().add(freeTextAnnot);
pdf.save(getOutputPath("out1.pdf"));
Aspose.PDF 25.9 的新功能
HTML 到 PDF 插件
Aspose.PDF for Java 现在包括 Html to Pdf 插件，以简化 HTML 到 PDF 的处理工作流。
// Specify the input and output file paths.
String inputPath = "sample.pdf";
String outputPath = "sample.html";
// Create an instance of the PdfHtmlplugin.
PdfHtml converter = new PdfHtml();
// Create an instance of the HtmlToPdfOptionsclass.
HtmlToPdfOptions options = new HtmlToPdfOptions();
// Add the input and output file paths to the options.
options.addInput(new FileDataSource(inputPath));
options.addOutput(new FileDataSource(outputPath));
// Process the PDF to HTML conversion using the plugin and options.
ResultContainer htmlResultContainer = converter.process(options);
// Get the result from the result container.
IOperationResult result = htmlResultContainer.getResultCollectionInternal().get_Item(0);
PDF 1.6 合规性支持
已为需要此文档版本的场景添加了对 PDF 1.6 合规性的支持。
Aspose.PDF 25.8 的新功能
表格边框样式支持
已添加表格边框样式的支持，以便更好地控制表格外观。
Document document = new Document();
try {
Page page = document.getPages().add();
GraphInfo tmp = new GraphInfo();
tmp.setDashArray(new int[]{10, 10});
tmp.setDashPhase(5);
tmp.setLineWidth(3);
Table tmp_1 = new Table();
tmp_1.setBorder(new BorderInfo(BorderSide.Box, tmp));
tmp_1.setDefaultCellBorder(new BorderInfo(BorderSide.Box, .05f, Color.getWhite()));
tmp_1.setDefaultCellPadding(new MarginInfo(4.5, 3, 4.5, 3));
tmp_1.getDefaultCellTextState().setFont(FontRepository.findFont("Arial"));
tmp_1.getDefaultCellTextState().setFontSize(10);
tmp_1.getDefaultCellTextState().setHorizontalAlignment(HorizontalAlignment.Left);
tmp_1.getDefaultCellTextState().setForegroundColor(Color.getBlack());
Table table1_allSidesSet = tmp_1;
page.getParagraphs().add(table1_allSidesSet);
for (int i = 0; i < 10; i++) {
Row newRow = table1_allSidesSet.getRows().add();
Cell cellLvl1 = newRow.getCells().add(String.valueOf(i));
}
Table tmp_2 = new Table();
tmp_2.setBorder(new BorderInfo(BorderSide.Box, 1));
tmp_2.setDefaultCellBorder(new BorderInfo(BorderSide.Box, 0.05f, Color.getWhite()));
tmp_2.setDefaultCellPadding(new MarginInfo(4.5, 3, 4.5, 3));
tmp_2.getDefaultCellTextState().setFont(FontRepository.findFont("Arial"));
tmp_2.getDefaultCellTextState().setFontSize(10);
tmp_2.getDefaultCellTextState().setHorizontalAlignment(HorizontalAlignment.Left);
tmp_2.getDefaultCellTextState().setForegroundColor(Color.getBlack());
//Style1 example
Table table2_onlyRightSideSet = tmp_2;
table2_onlyRightSideSet.getBorder().getRight().setDashArray(new int[]{5, 10});
table2_onlyRightSideSet.getBorder().getRight().setDashPhase(7);
page.getParagraphs().add(table2_onlyRightSideSet);
//Style2 example
// Table table3_roundCorner= tmp_2;
// table3_roundCorner.setCornerStyle(BorderCornerStyle.Round);
// table3_roundCorner.getBorder().setRoundedBorderRadius(15);
// page.getParagraphs().add(table3_roundCorner);
for (int i = 0; i < 10; i++) {
Row newRow = table2_onlyRightSideSet.getRows().add();
Cell cellLvl1 = newRow.getCells().add(String.valueOf(i));
}
document.save(output);
} finally {
if (document != null) {
document.close();
}
}
PDF 中图像的 ALT 文本提取
现在，您可以获取 PDF 文档中图像的 ALT 文本描述，这有助于面向可访问性的处理。
Document doc = new Document("input.pdf");
try {
// Create ImagePlacementAbsorber object to perform image placement search
ImagePlacementAbsorber abs = new ImagePlacementAbsorber();
// Accept the absorber for all the pages
doc.getPages().accept(abs);
// Loop through all ImagePlacements, get image and ImagePlacement Properties
ImagePlacement imagePlacement = abs.getImagePlacements().get_Item(1);
{
// Get the image using ImagePlacement object
XImage image = imagePlacement.getImage();
List<String> altTexts = image.getAlternativeText(imagePlacement.getPage());
System.out.println(altTexts.get(0));
}
} finally {
if (doc != null)
doc.close();
}
Aspose.PDF 25.7 的新功能
PDF ChatGPT 插件
Aspose.PDF for Java 现在包含了一个用于 PDF 为中心的 AI 交互场景的 PDF ChatGPT 插件。
示例演示了如何通过将文件作为消息来源来使用 PdfChatGpt 插件：
PdfChatGpt plugin = new PdfChatGpt();
PdfChatGptRequestOptions options = new PdfChatGptRequestOptions();
options.addOutput(new FileDataSource("PdfChatGPT_output.pdf")); // Add the output file path.
// Add the PDF text source.
// In case of multiple sources, the text from each document will be added to the request message collection
// as a separate message with the role "user".
options.addInput(new FileDataSource("TextSource.pdf"));
options.setApiKey("Your API key."); // You need to provide the key to access the API.
options.setMaxTokens(1000); // The maximum number of tokens to generate in the chat completion.
// Add the request message.
// In this case, the system message with Content = "You are a helpful assistant." is added by default.
// The role of the query message is "user" by default.
options.setQuery("How many letters in the provided text?");
// Process the request.
ResultContainer result = plugin.process(options);
String fileResultPath = result.getResultCollection().get(0).getData().toString();
ChatCompletion chatCompletionObject = (ChatCompletion)result.getResultCollection().get(1).getData();
此示例演示了如何通过向请求添加消息来使用 PdfChatGpt 插件：
PdfChatGpt plugin = new PdfChatGpt();
PdfChatGptRequestOptions options = new PdfChatGptRequestOptions();
options.addOutput(new FileDataSource("PdfChatGPT_output.pdf")); // Add the output file path.
options.setApiKey("Your API key."); // You need to provide the key to access the API.
options.setMaxTokens(1000); // The maximum number of tokens to generate in the chat completion.
// Add the request messages.
Message message1 = new Message() ;
message1.setContent("You are a helpful assistant.");
message1.setRole(Role.System);
options.getMessages().add(message1);
Message message2 = new Message() ;
message2.setContent("What is the biggest pizza diameter ever made?");
message2.setRole(Role.User);
options.getMessages().add(message2);
// Process the request.
ResultContainer result = plugin.process(options);
String fileResultPath = result.getResultCollection().get(0).getData().toString();
ChatCompletion chatCompletionObject = (ChatCompletion)result.getResultCollection().get(1).getData(); // The ChatGPT API chat completion object.
此示例演示了如何通过向请求添加一条消息来使用 PdfChatGpt 插件：
PdfChatGpt plugin = new PdfChatGpt();
PdfChatGptRequestOptions options = new PdfChatGptRequestOptions();
options.addOutput(new FileDataSource("PdfChatGPT_output.pdf")); // Add the output file path.
options.setApiKey("Your API key."); // You need to provide the key to access the API.
options.setMaxTokens(1000); // The maximum number of tokens to generate in the chat completion.
// Add the request message.
// In this case, the system message with Content = "You are a helpful assistant." is added by default.
// The role of the query message is "user" by default.
options.setQuery("What is the lowest temperature recorded on the Earth?");
// Process the request.
ResultContainer result = plugin.process(options);
String fileResultPath = result.getResultCollection().get(0).getData().toString();
ChatCompletion chatCompletionObject = (ChatCompletion)result.getResultCollection().get(1).getData(); // The ChatGPT API chat completion object.
Aspose.PDF 25.6 的新功能
改进的 PDF 到 DOCX 输出格式化
对于先前输出格式不正确的文档，PDF 到 DOCX 的转换已得到改进。
Document doc = new Document(dataDir + "SD_Aspose.pdf");
DocSaveOptions saveOption = new DocSaveOptions();
saveOption.setMode(DocSaveOptions.RecognitionMode.EnhancedFlow);
saveOption.setFormat(DocSaveOptions.DocFormat.DocX);
saveOption.setRecognizeBullets(true);
doc.save(dataDir + "SD_Aspose.docx", saveOption);
Aspose.PDF 25.5 的新增功能
在 PDF 转 ODS 转换中保留图像
在将 PDF 文档转换为 ODS 时，图像现在会被保留。
Document doc = new Document("input.pdf");
ExcelSaveOptions options = new ExcelSaveOptions();
options.setFormat(ExcelSaveOptions.ExcelFormat.ODS);
doc.save("output.ods", options);
PDF 转 PDF/A 转换期间的自动标签创建
PDF 转 PDF/A 转换现已支持自动标签创建，以提升输出文档的标签化结果。
Document document = new Document(dataDir+"source.pdf");
PdfFormat format = PdfFormat.PDF_A_1A;
PdfFormatConversionOptions options = new PdfFormatConversionOptions(format, ConvertErrorAction.Delete);
options.setAutoTaggingSettings(AutoTaggingSettings.getDefault());
document.convert(options);
document.save(dataDir+"out_"+BuildVersionInfo.ASSEMBLY_VERSION+"_"+format+"_"+document.getFileName());
document.close();
Aspose.PDF 25.4 的新功能
在 PDF 转 XLSX 转换中保留超链接
在将 PDF 文档转换为 XLSX 时，超链接现在会被保留，从而提升导出电子表格中的导航体验。
Document doc = new Document("input.pdf");
ExcelSaveOptions options = new ExcelSaveOptions();
doc.save("output.xlsx", options);
Aspose.PDF 25.3 的新功能
自 25.2 版添加了检测 PDF 数字签名受损的能力。您可以使用 ‘SignaturesCompromiseDetector’ 类来验证数字签名是否受损。调用 check() 方法来检查文档’s 签名。如果未检测到签名受损，方法将返回 true。要验证现有签名是否覆盖整个文档，请使用 ‘SignaturesCoverage’ 属性。
void check(String pdfFile) {
final Document document = new Document(pdfFile);
try {
SignaturesCompromiseDetector detector = new SignaturesCompromiseDetector(document);
CompromiseCheckResult result = null;
CompromiseCheckResult[] referenceToResult = {result};
System.out.println(detector.check(referenceToResult));
if (detector.check(referenceToResult)){
System.out.println("No signature compromise detected");
}
result = referenceToResult[0];
System.out.println(SignaturesCoverage.PartiallySigned == result.getSignaturesCoverage());
System.out.println(result.hasCompromisedSignatures());
} finally {
if (document != null) {
(document).close();
}
}
}
Aspose.PDF 25.2 有哪些新功能
自 25.2 版起，新增将 PDF 转换为 PDF/X-4 文件格式的功能：
String iccProfile = "PSO_MFC_Paper_eci";
String outputConditionIdentifier = "FOGRA41";
String inputPdf= dataDir + "PDFToPDFX.pdf";
String outputPdf= dataDir + "PDFToPDFX_out.pdf";
PdfFormat format = PdfFormat.PDF_X_4;
Document document = new Document(inputPdf);
PdfFormatConversionOptions options = new PdfFormatConversionOptions(format, ConvertErrorAction.Delete);
options.setIccProfileFileName(dataDir + iccProfile + ".icc");
options.setOutputIntent(new OutputIntent(outputConditionIdentifier));
document.convert(options);
document.save(outputPdf);
自 25.2 版起，已可以将输出的 HTML 居中对齐：
Document doc = new Document(dataDir + "pdf_sample.pdf");
// Instantiate HTML Save options object
HtmlSaveOptions newOptions = new HtmlSaveOptions();
// Enable option to embed all resources inside the HTML
newOptions.PartsEmbeddingMode = HtmlSaveOptions.PartsEmbeddingModes.EmbedAllIntoHtml;
// This is just optimization for IE and can be omitted
newOptions.LettersPositioningMethod = LettersPositioningMethods.UseEmUnitsAndCompensationOfRoundingErrorsInCss;
newOptions.RasterImagesSavingMode = HtmlSaveOptions.RasterImagesSavingModes.AsEmbeddedPartsOfPngPageBackground;
newOptions.FontSavingMode = HtmlSaveOptions.FontSavingModes.SaveInAllFormats;
newOptions.AntialiasingProcessing = HtmlSaveOptions.AntialiasingProcessingType.TryCorrectResultHtml;
newOptions.setSplitIntoPages(false);// force write HTMLs of all pages into one output document
newOptions.setUseZOrder(true);
com.aspose.pdf.SaveOptions.BorderPartStyle style = new com.aspose.pdf.SaveOptions.BorderPartStyle();
style.LineType = com.aspose.pdf.SaveOptions.HtmlBorderLineType.Solid;
style.color = java.awt.Color.BLACK;
style.setWidthInPoints(1);
newOptions.PageBorderIfAny = new com.aspose.pdf.SaveOptions.BorderInfo(style);
doc.save(dataDir + "HTML_19.6.html", newOptions);
此外，自 25.2 版起，已能够使用 Aspose.PDF 获取给定字体和尺寸的文本的上升线和下降线。此新功能已实现于类 ‘com.aspose.pdf.Font’。
新增方法：
测量最大上升点
-public double getAscentPoint(String str, float fontSize)
测量最大下降点
- public double getDescentPoint(String str, float fontSize)
String someText = "Testing text";
float fontSize = 10;
TextFragment tf = new TextFragment(someText);
Font f1 = tf.getTextState().getFont();
double getWidthPoint = f1.measureString(someText, fontSize);
double getAscentPoint = f1.getAscentPoint(someText, fontSize);
double getDescentPoint = f1.getDescentPoint(someText, fontSize);
System.out.println(f1.getFontName());
System.out.println(getWidthPoint);
System.out.println(getAscentPoint);
System.out.println(getDescentPoint);
Aspose.PDF 25.1 的新功能
将外部 ICC 配置文件路径传递给 PDF/X 和 PDF/A 转换的功能在库中已有多年，可通过 PdfFormatConversionOptions.IccProfileFileName 属性实现。现在，也可以使用 OutputIntent 类的对象传递数据来填充 OutputIntent 属性。
以下代码片段展示了如何使用注释 FOGRA39 ICC 配置文件将注释文档转换为 PDF/X-1：
String iccProfile = "Coated_Fogra39L_VIGC_300.icc";
String outputConditionIdentifier = "FOGRA39";
Document pdfDocument = new Document("58191_1.pdf");
try {
PdfFormatConversionOptions options = new PdfFormatConversionOptions("log.log", PdfFormat.PDF_X_1A, ConvertErrorAction.Delete);
options.setIccProfileFileName(iccProfile);
options.setOutputIntent(new OutputIntent(outputConditionIdentifier));
pdfDocument.convert(options);
pdfDocument.save("42686_1_PDF_X_1A.pdf");
} finally {
if (pdfDocument != null) {
pdfDocument.dispose();
}
}
自 25.1 起，添加了在使用文档时获取特权信息的功能：
Document document = new Document();
document.getPages().add();
try
{
PdfFileInfo info = new PdfFileInfo();
info.bindPdf(document);
DocumentPrivilege privilege = info.getDocumentPrivilege();
System.out.println(2 == privilege.getCopyAllowLevel());
System.out.println(2 == privilege.getPrintAllowLevel());
System.out.println(-1 == privilege.getChangeAllowLevel());
privilege.setCopyAllowLevel(0);
privilege.setCopyAllowLevel(1);
privilege.setCopyAllowLevel(2);
privilege.setPrintAllowLevel(0);
privilege.setPrintAllowLevel(1);
privilege.setPrintAllowLevel(2);
privilege.setChangeAllowLevel(0);
privilege.setChangeAllowLevel(1);
privilege.setChangeAllowLevel(2);
privilege.setChangeAllowLevel(3);
privilege.setChangeAllowLevel(4);
PdfFileSecurity fs = new com.aspose.pdf.facades.PdfFileSecurity(document, dataDir + "out_new_Doc"+version+".pdf");
fs.setPrivilege(privilege);
}
finally {
if (document != null) document.dispose();
}
Aspose.PDF 24.12 中的新功能
自 24.12 版本以来，已能够支持代理对字符。
术语“surrogate pair”指的是在 UTF-16 编码方案中对高码点 Unicode 字符的编码。
String surrogate_pair = "рџЊ‰";
System.out.println(surrogate_pair.length());//==2
Document doc = new Document();
Page p = doc. getPages().add();
//add the path to the required fonts that contains surrogate pair characters
FontRepository.addLocalFontPath("C:\\Fonts\\Noto_Emoji");
Font f = FontRepository.findFont("Noto Emoji");
System.out.println(f.doesFontContainAllCharacters(surrogate_pair));
TextFragment textFragment = new TextFragment();
TextSegment segment = new TextSegment(surrogate_pair);
segment.getTextState().setFont(f);
textFragment.setText(surrogate_pair);
textFragment.getSegments().add(segment);
p.getParagraphs().add(textFragment);
doc.save(dataDir + "out_24_11_.pdf");
自 24.12 版起，已可以将 PDF 文档转换为 PDF/A-4。该标准的第 4 部分基于 PDF 2.0，于 2020 年底发布。
以下代码片段演示了如何在输入文档的 PDF 版本早于 2.0 时，将文档转换为 PDF/A-4 格式。
Document document = new Document(inputPdf);
// Only PDF-2.x documents can be converted to PDF/A-4
document.convert("log1.xml", PdfFormat.v_2_0, ConvertErrorAction.Delete);
document.save(tmpOutputFile);
document = new Document(tmpOutputFile);
document.convert("log2.xml", PdfFormat.PDF_A_4, ConvertErrorAction.Delete);
document.save("output.pdf");
Aspose.PDF 24.9 的新功能
在此版本中，可以使用底层函数创建可访问的 PDF：
以下代码片段针对 PDF 文档及其标记内容，使用 Aspose.PDF 库进行处理。
//Create template document with simple text
Document documentTemp = new Document();
Page page = documentTemp .getPages().add();
TextFragment fragment = new TextFragment("Helloworld");
page.getParagraphs().add(fragment);
documentTemp .save(output);
//Add tag to the text in the document
Document document = new Document(output);
OperatorCollection operators = document.getPages().get_Item(1).getContents();
for (int i = 1; i <= operators.size(); i++) {
Operator op = operators.get_Item(i);
if (op instanceof BT) {
BDC bdc = new BDC("P", new BDCProperties(new Integer[]{1}, "ru", "Hello world"));
operators.insert(i - 1, bdc);
i += 1;
}
if (op instanceof ET) {
operators.insert(i + 1, new EMC());
i += 1;
}
}
ITaggedContent content = document.getTaggedContent();
SpanElement span = content.createSpanElement();
content.getRootElement().appendChild(span);
for (Operator op : operators) {
if (op instanceof BDC) {
BDC bdc = (BDC)op;
if (bdc != null) {
span.tag(bdc);
}
}
}
document.save(output);
这 GraphicalPdfComparer 已添加类用于 PDF 文档和页面的图形比较。图形比较处理文档页面图像。它将结果作为 an ImagesDifference 对象或作为 PDF 文档，其中包含从原始文档和差异合并的图像。图形比较最适用于文本或图形内容有细微差异的文档。
下面的代码片段演示了两个 PDF 文档的图形比较，并将包含差异的图像保存到生成的 PDF 文档中：
GraphicalPdfComparer comparer = new GraphicalPdfComparer();
comparer.setThreshold(3.0);
comparer.setColor(Color.getRed());
comparer.setResolution(new Resolution(300));
Document doc1 = new Document(dataDir+"graph_compare.pdf");
Document doc2 = new Document(dataDir+"graph_compare_.pdf");
comparer.compareDocumentsToPdf(doc2, doc1, dataDir+"graph_compare_24_9__.pdf");
doc1.close();
doc2.close();
Aspose.PDF 24.8 有哪些新功能
自 24.8 起，支持 PDF/A-4 格式：
Document document = new Document(inputPdf);
// Only PDF-2.x documents can be converted to PDF/A-4
document.convert(new ByteArrayOutputStream(), PdfFormat.v_2_0, ConvertErrorAction.Delete);
boolean converted = document.convert(logFile, PdfFormat.PDF_A_4, ConvertErrorAction.Delete);
document.save(outputFile);
另外，是否可以为 Image Stamp 添加替代文本：
已将 AlternativeText 属性添加到 ImageStamp——如果为其分配了值，则在将 ImageStamp 添加到文档时，它将具有替代文本。
String p1_Alt1 = "*** page 1, Alt text 1 ***",
p1_Alt2 = "*** page 1, Alt text 2 ***",
p2_Alt1 = "--- page 1, Alt text 1 ---",
p2_Alt2 = "--- page 1, Alt text 2 ---";
StructTreeRootElement structTreeRoot = document.getTaggedContent().getStructTreeRootElement();
ImageStamp imageStamp = new ImageStamp(dataDir + "test.jpg");
imageStamp.setXIndent(100);
imageStamp.setYIndent(700);
imageStamp.setWidth(50);
imageStamp.setHeight(50);
imageStamp.setQuality(100);
imageStamp.setAlternativeText(p1_Alt1);
// To page 1
document.getPages().get_Item(1).addStamp(imageStamp);
imageStamp.setYIndent(500);
imageStamp.setAlternativeText(p1_Alt2);
document.getPages().get_Item(1).addStamp(imageStamp);
// To page 2
document.getPages().add();
imageStamp.setXIndent(400);
imageStamp.setYIndent(700);
imageStamp.setWidth(50);
imageStamp.setHeight(50);
imageStamp.setAlternativeText(p2_Alt1);
document.getPages().get_Item(2).addStamp(imageStamp);
imageStamp.setYIndent(500);
imageStamp.setAlternativeText(p2_Alt2);
document.getPages().get_Item(2).addStamp(imageStamp);
// Save document
document.save(outFile);
此外，以下代码展示了如何在 FigureElements 中的现有图像添加 AlternativeText。
String inFile = dataDir + "46040.pdf";
String outFile = dataDir + "46040_1_out.pdf";
Document document = new Document(inFile);
ITaggedContent taggedContent = document.getTaggedContent();
StructureElement rootElement = taggedContent.getRootElement();
Iterator tmp0 = (rootElement.getChildElements()).iterator();
while (tmp0.hasNext())
{
com.aspose.pdf.tagged.logicalstructure.elements.Element element = (com.aspose.pdf.tagged.logicalstructure.elements.Element)tmp0.next();
if (element instanceof com.aspose.pdf.tagged.logicalstructure.elements.FigureElement)
{
com.aspose.pdf.tagged.logicalstructure.elements.FigureElement figureElement = (com.aspose.pdf.tagged.logicalstructure.elements.FigureElement)element;
// Set Alternative Text
figureElement.setAlternativeText("Figure alternative text (technique 1)");
}
}
// Save document
document.save(outFile);
Aspose.PDF 24.7 有哪些新功能
自 24.7 版发布以来，作为编辑标记式 PDF 的一部分，已在 Aspose.Pdf.LogicalStructure.Element 上添加了方法：
- Tag (向特定操作符，如图像、文本和链接，添加标签)
- InsertChild
- RemoveChild
- ClearChilds
这些方法允许您编辑 PDF 文件标签，例如：
Document document = new Document(dataDir + "test.pdf");
// Retrieve the first page of the document.
Page page = document.getPages().get_Item(1);
// Initialize variables to hold BDC (Begin Dictionary Context) elements for different purposes.
BDC imageBdc = null;
BDC pBdc = null;
BDC link1Bdc = null;
BDC link2Bdc = null;
BDC helloBdc = null;
// Iterate through the contents of the page.
for (int i = 1; i <= page.getContents().size(); i++)
{
// Get the current operator from the page contents.
Operator op = page.getContents().get_Item(i);
// Check if the operator is an instance of BDC.
if (op instanceof BDC) {
BDC bdc = (BDC)op; // Cast the operator to BDC type.
if (bdc != null)
{
// Check if the MCID (Mark Content Identifier) of the BDC is 0.
if (bdc.getProperties().getMCID()[0] != null && bdc.getProperties().getMCID()[0] == 0)
{
helloBdc = bdc; // Store the BDC for later use.
}
}
}
// Check if the operator is an instance of Do (Draw Object).
if (op instanceof Do) {
Do doXobj = (Do)op; // Cast the operator to Do type.
if (doXobj != null)
{
// Create a new BDC for an image and insert it into the page contents.
imageBdc = new BDC("Figure");
page.getContents().insert(i - 2, imageBdc); // Insert before the current operator.
i++; // Increment the index to account for the inserted BDC.
page.getContents().insert(i + 1, new EMC()); // Insert an EMC (End Mark Content).
i++; // Increment the index again.
}
}
// Check if the operator is an instance of TextShowOperator (for text display).
if (op instanceof TextShowOperator) {
TextShowOperator tx = (TextShowOperator)op; // Cast the operator to TextShowOperator type.
if (tx != null)
{
// Check for specific text content and insert corresponding BDCs.
if (tx.getText().contains("efter Ukendt forfatter er licenseret under"))
{
pBdc = new BDC("P");
page.getContents().insert(i - 1, pBdc); // Insert before the current operator.
i++; // Increment the index.
page.getContents().insert(i + 1, new EMC()); // Insert an EMC.
i++; // Increment the index.
}
if (tx.getText().contains("CC"))
{
link1Bdc = new BDC("Link");
page.getContents().insert(i - 1, link1Bdc); // Insert before the current operator.
i++; // Increment the index.
page.getContents().insert(i + 1, new EMC()); // Insert an EMC.
i++; // Increment the index.
}
if (tx.getText().contains("Dette billede"))
{
link2Bdc = new BDC("Link");
page.getContents().insert(i - 1, link2Bdc); // Insert before the current operator.
i++; // Increment the index.
page.getContents().insert(i + 1, new EMC()); // Insert an EMC.
i++; // Increment the index.
}
}
}
}
// Retrieve the tagged content from the document.
ITaggedContent tagged = document.getTaggedContent();
// Process the tagged content to modify structure attributes.
// Get the first child element of the root element in the tagged content.
com.aspose.pdf.tagged.logicalstructure.elements.Element p = tagged.getRootElement().getChildElements().get_Item(1);
p.clearChilds(); // Clear existing child elements.
// Tag the helloBdc with the parent structure element.
MCRElement mcr = p.tag(helloBdc);
// Create and set structure attributes for the tagged element.
StructureAttributes attrs = com.aspose.pdf.tagged.logicalstructure.elements.InternalHelper.getParentStructureElement(mcr)
.getAttributes().createAttributes(AttributeOwnerStandard.Layout);
StructureAttribute attr = new StructureAttribute(AttributeKey.SpaceAfter);
attr.setNumberValue(30.625); // Set space after attribute.
attrs.setAttribute(attr); // Apply the attribute to the structure.
// Create a new FigureElement in the tagged content.
com.aspose.pdf.tagged.logicalstructure.elements.FigureElement figure = tagged.createFigureElement();
tagged.getRootElement().insertChild(figure, 2); // Insert the figure element at the second position.
figure.setAlternativeText("A fly."); // Set alternative text for the figure.
// Tag the imageBdc with the figure element.
MCRElement mcr = figure.tag(imageBdc);
// Retrieve the parent structure element of the specified MCR (Marked Content Reference)
StructureAttributes attrs = com.aspose.pdf.tagged.logicalstructure.elements.InternalHelper.getParentStructureElement(mcr)
.getAttributes().createAttributes(AttributeOwnerStandard.Layout);
// Create a new StructureAttribute for space after the element
StructureAttribute spaceAfter = new StructureAttribute(AttributeKey.SpaceAfter);
spaceAfter.setNumberValue(3.625); // Set the space after value to 3.625 units
attrs.setAttribute(spaceAfter); // Assign the space after attribute to the structure attributes
// Create a new StructureAttribute for bounding box (BBox)
StructureAttribute bbox = new StructureAttribute(AttributeKey.BBox);
bbox.setArrayNumberValue(new Double[][] { new Double[] { (71.9971) }, new Double[] { (375.839) }, new Double[] { (523.299) }, new Double[] { (714.345) } });
// Set the bounding box values for the structure attribute
attrs.setAttribute(bbox); // Assign the bounding box attribute to the structure attributes
// Create a new StructureAttribute for placement
StructureAttribute placement = new StructureAttribute(AttributeKey.Placement);
placement.setNameValue(AttributeName.Placement_Block); // Set the placement type to block
attrs.setAttribute(placement); // Assign the placement attribute to the structure attributes
// Retrieve the fourth child element from the root element of the tagged structure
StructureElement p2 = (StructureElement)tagged.getRootElement().getChildElements().get_Item(3);
p2.clearChilds(); // Clear any existing child elements from p2
// Create a new SpanElement to be added to p2
SpanElement span1 = tagged.createSpanElement();
// Create structure attributes for the span element
StructureAttributes attrs = span1.getAttributes().createAttributes(AttributeOwnerStandard.Layout);
// Create a new StructureAttribute for text decoration type
StructureAttribute textDecorationType = new StructureAttribute(AttributeKey.TextDecorationType);
textDecorationType.setNameValue(AttributeName.TextDecorationType_Underline); // Set text decoration to underline
attrs.setAttribute(textDecorationType); // Assign the text decoration type attribute to the structure attributes
// Create a new StructureAttribute for text decoration thickness
StructureAttribute textDecorationThickness = new StructureAttribute(AttributeKey.TextDecorationThickness);
textDecorationThickness.setNumberValue(0); // Set the thickness of the text decoration to 0
attrs.setAttribute(textDecorationThickness); // Assign the text decoration thickness attribute to the structure attributes
// Create a new StructureAttribute for text decoration color
StructureAttribute textDecorationColor = new StructureAttribute(AttributeKey.TextDecorationColor);
textDecorationColor.setArrayNumberValue(new Double[][] { new Double[] { (0.0196075) }, new Double[] { (0.384308) }, new Double[] { (0.756866) } });
// Set the RGB color values for the text decoration
attrs.setAttribute(textDecorationColor); // Assign the text decoration color attribute to the structure attributes
p2.appendChild(span1); // Append the span1 element to p2
// Create a new MCR element and tag it with pBdc
MCRElement mcr = p2.tag(pBdc);
// Retrieve the parent structure element of the MCR and create layout attributes
StructureAttributes attrs = com.aspose.pdf.tagged.logicalstructure.elements.InternalHelper.getParentStructureElement(mcr)
.getAttributes().createAttributes(AttributeOwnerStandard.Layout);
// Create a new StructureAttribute for text alignment
StructureAttribute textAlign = new StructureAttribute(AttributeKey.TextAlign);
textAlign.setNameValue(AttributeName.TextAlign_Center); // Set text alignment to center
attrs.setAttribute(textAlign); // Assign the text alignment attribute to the structure attributes
// Create a new StructureAttribute for space after the element
StructureAttribute spaceAfter = new StructureAttribute(AttributeKey.SpaceAfter);
spaceAfter.setNumberValue(21.75); // Set the space after value to 21.75 units
attrs.setAttribute(spaceAfter); // Assign the space after attribute to the structure attributes
// Create a new SpanElement to be added to p2
SpanElement span2 = tagged.createSpanElement();
// Create structure attributes for the span element
StructureAttributes attrs = span2.getAttributes().createAttributes(AttributeOwnerStandard.Layout);
// Create a new StructureAttribute for text decoration type
StructureAttribute textDecorationType = new StructureAttribute(AttributeKey.TextDecorationType);
textDecorationType.setNameValue(AttributeName.TextDecorationType_Underline); // Set text decoration to underline
attrs.setAttribute(textDecorationType); // Assign the text decoration type attribute to the structure attributes
// Create a new StructureAttribute for text decoration color using the specified key.
StructureAttribute textDecorationColor = new StructureAttribute(AttributeKey.TextDecorationColor);
// Set the array number value for the text decoration color attribute.
// The color is represented in an array of RGB values, where each value is a Double.
textDecorationColor.setArrayNumberValue(new Double[][] {
new Double[] { (0.0196075) }, // Red component
new Double[] { (0.384308) }, // Green component
new Double[] { (0.756866) } // Blue component
});
// Set the text decoration color attribute to the attrs object.
attrs.setAttribute(textDecorationColor);
// Append a child span element to the parent element p2.
p2.appendChild(span2);
// Create a new LinkElement instance for the second link.
LinkElement link2 = tagged.createLinkElement();
// Assign a unique ID to the link element using a randomly generated UUID.
link2.setId(UUID.randomUUID().toString());
// Append the link2 element as a child of span2.
span2.appendChild(link2);
// Tag the link2 element with the corresponding annotation from the page's annotations.
link2.tag(page.getAnnotations().get_Item(1));
// Tag the link2 element with additional metadata or context (link2Bdc).
link2.tag(link2Bdc);
// Create another LinkElement instance for the first link.
LinkElement link1 = tagged.createLinkElement();
// Assign a unique ID to the link1 element using a randomly generated UUID.
link1.setId(UUID.randomUUID().toString());
// Append the link1 element as a child of span1.
span1.appendChild(link1);
// Tag the link1 element with the corresponding annotation from the page's annotations.
link1.tag(page.getAnnotations().get_Item(2));
// Tag the link1 element with additional metadata or context (link1Bdc).
link1.tag(link1Bdc);
// Remove the first child element from the root element of the tagged document.
tagged.getRootElement().removeChild(0);
// Save the document to the specified output directory with the filename "_out.pdf".
document.save(dataDir + "_out.pdf");
Aspose.PDF 24.6 的新功能
自 24.6 起，Aspose.PDF for Java 支持使用 java.security.cert.X509Certificate、java.security.PrivateKey 对 PDF 进行签名：
此代码从证书存储中检索证书和私钥，然后使用它们在 PDF 文档的首页上应用数字签名。
KeyStore trustStore = KeyStore.getInstance("Windows");
trustStore.load(null, null);
java.security.cert.X509Certificate certificate = (java.security.cert.X509Certificate) trustStore.getCertificate("ProfMoriarty");
PrivateKey key = (PrivateKey) trustStore.getKey("ProfMoriarty", null);
PdfFileSignature pdfSign = new PdfFileSignature(getInputPdf());
Signature signature = new ExternalSignature(certificate, key);
pdfSign.sign(1, "reasonTest", "contactTest", "locationTest", true, new java.awt.Rectangle(1, 691, 100, 100), signature);
pdfSign.save("PDFJAVA.pdf");
pdfSign.close();
Aspose.PDF 24.5 的新功能
自 24.5 版本发布以来，已实现 Form Editor 插件。
如何使用 Form Editor 编辑 PDF 表单
- 设置您的 license keys
- 创建 FormEditor 类的实例，该类提供用于操作 PDF 表单的方法
- 创建 FormEditorAddOptions 类的实例，该类指定向 PDF 文档添加表单字段的选项
- 使用 FileDataSource 类（表示文件路径或流），向 FormEditorAddOptions 对象添加输入文件源和输出文件源
- 调用 FormEditor 对象的 Process 方法，将 FormEditorAddOptions 对象作为参数传入
- 使用 ResultContainer.resultCollection 访问结果
// Specify the input and output paths for the PDF files.
String inputPath = "sample.pdf";
String outputPath = "out.pdf";
// Create an instance of the FormEditor plugin.
FormEditor pdfFormPlugin = new FormEditor();
// Create options for adding form fields.
ArrayList<FormFieldCreateOptions> options = new ArrayList<FormFieldCreateOptions>();
// Create a textbox form field.
FormTextBoxFieldCreateOptions tmp1 = new FormTextBoxFieldCreateOptions(1, new Rectangle(10, 600, 90, 610));
tmp1.setValue("TextBoxField");
tmp1.setColor(Color.getChocolate());
tmp1.setPartialName("TexBoxField");
options.add(tmp1);
// Create a combo box form field.
FormComboBoxFieldCreateOptions tmp2 = new FormComboBoxFieldCreateOptions(1, new Rectangle(310, 800, 350, 815));
tmp2.setColor(com.aspose.pdf.Color.getRed());
tmp2.setEditable(new Boolean[]{true});
tmp2.setDefaultAppearance(new DefaultAppearance("Arial Bold", 12, java.awt.Color.GREEN));
ArrayList<String> list1 = new ArrayList<String>();
list1.add("p1");
list1.add("p2");
list1.add("p3");
tmp2.setOptions(list1);
tmp2.setSelected(new Integer[]{2});
tmp2.setPartialName("ComboBoxField");
options.add(tmp2);
// Create a checkbox form field.
FormCheckBoxFieldCreateOptions tmp3 = new FormCheckBoxFieldCreateOptions(1, new Rectangle(10, 700, 90, 715));
tmp3.setValue("CheckBoxField 1");
tmp3.setPartialName("CheckBoxField_1");
tmp3.setColor(Color.getBlue());
options.add(tmp3);
// Create a checkbox form field.
FormCheckBoxFieldCreateOptions tmp4 = new FormCheckBoxFieldCreateOptions(1, new Rectangle(100, 700, 190, 715));
tmp4.setChecked(new Boolean[]{true});
tmp4.setValue("CheckBoxField 2");
tmp4.setDefaultAppearance(new DefaultAppearance("Arial Bold", 12, java.awt.Color.GREEN));
tmp4.setStyle(new Integer[]{BoxStyle.Cross});
options.add(tmp4);
// Create a checkbox form field.
FormCheckBoxFieldCreateOptions tmp5 = new FormCheckBoxFieldCreateOptions(1, new Rectangle(200, 700, 390, 715));
tmp5.setPartialName("CheckBoxField_3");
tmp5.setValue("CheckBoxField 3");
tmp5.setStyle(new Integer[]{BoxStyle.Star});
tmp5.setChecked(new Boolean[]{true});
tmp5.setTextHorizontalAlignment(new HorizontalAlignment[]{HorizontalAlignment.Center});
options.add(tmp5);
FormEditorAddOptions opt = new FormEditorAddOptions(options);
// Add input and output files to the options.
opt.addInput(new FileDataSource(inputPath));
opt.addOutput(new FileDataSource(outputPath));
// Process the form fields using the plugin.
ResultContainer results = pdfFormPlugin.process(opt);
此版本使我们能够使用 PDF 图层。例如：
- 锁定 PDF 图层
- 提取 PDF 图层元素
- 将分层 PDF 扁平化
- 将 PDF 中的所有图层合并为一个
锁定 PDF 图层
自 24.5 版本发布以来，您可以打开 PDF，锁定第一页上的特定图层，并保存带有更改的文档。新增了两个方法和一个属性：
Layer.Lock(); - 锁定图层。 Layer.Unlock(); -解锁图层。 Layer.Locked; - 属性，指示图层锁定状态。
Document document = new Document(input);
Page page = document.getPages().get_Item(1);
Layer layer = page.getLayers().get(0);
layer.lock();
document.save(output);
提取 PDF 图层元素
Aspose.PDF for Java 库允许从首页提取每个图层，并将每个图层保存到单独的文件中。
要从图层创建新的 PDF，可以使用以下代码片段：
Document document = new Document(inputPath);
java.util.List<Layer> layers = document.getPages().get_Item(1).getLayers();
for (Layer layer : layers)
{
layer.save(outputPath);
}
展平分层 PDF
Aspose.PDF for Java 库打开 PDF，遍历首页上的每个图层，并将每个图层扁平化，使其永久保留在页面上。
Document document = new Document(input);
Page page = document.getPages().get_Item(1);
for (Layer layer : page.getLayers())
{
layer.flatten(true);
}
document.save(output);
Layer.flatten(boolean cleanupContentStream) 方法接受一个布尔参数，用于指定是否从内容流中移除可选内容组标记。 将 cleanupContentStream 参数设置为 false 可以加快展平过程的速度。
将 PDF 中的所有图层合并为一个
Aspose.PDF for Java 库允许将所有 PDF 层或第一页上的特定层合并到一个新层中，并保存更新后的文档。
已添加两种方法来合并页面上的所有图层：
- void mergeLayers(String newLayerName);
- void mergeLayers(String newLayerName, String newOptionalContentGroupId);
第二个参数允许重命名可选内容组标记。默认值是 “oc1” (/OC /oc1 BDC)。
Document document = new Document(input);
Page page = document.getPages().get_Item(1);
page.mergeLayers("NewLayerName");
// Or page.mergeLayers("NewLayerName", "OC1");
document.save(output);
Aspose.PDF 24.4 有哪些新功能
此版本引入了针对 PDF 的 Java 插件：
- 表单扁平化插件
FormFlattener pdfFormPlugin = new FormFlattener();
FormFlattenAllFieldsOptions opt = new FormFlattenAllFieldsOptions();
opt.addInput(new FileDataSource("sample.pdf"));
opt.addOutput(new FileDataSource("sample-flat.pdf"));
ResultContainer result = pdfFormPlugin.process(opt);
// Check result.
java.util.List < IOperationResult > resultCollectionInternal = result.getResultCollection();
- Form 导出器
Rectangle rect = new com.aspose.pdf.Rectangle(0, 220, 600, 330);
// Plugin use.
FormExporter pdfFormPlugin = new FormExporter();
SelectField selectField = new SelectField() {
public boolean invoke(Field field) {
return field instanceof TextBoxField && field.getPageIndex() == 2 && rect.isInclude(field.getRect(), 0);
}
};
FormExporterValuesToCsvOptions opt = new FormExporterValuesToCsvOptions(selectField, ';');
opt.addInput(new FileDataSource(inputFileNameWithFields));
opt.addInput(new FileDataSource(getInputPath("document-1.pdf")));
opt.addInput(new FileDataSource(getInputPath("document-2.pdf")));
opt.addInput(new FileDataSource(getInputPath("document-3.pdf")));
opt.addOutput(new FileDataSource(getOutputPath("out.csv")));
ResultContainer result = pdfFormPlugin.process(opt);
// Check result.
System.out.println(result.getResultCollectionInternal().size() > 0);
System.out.println(result.getResultCollectionInternal().get_Item(0).isFile());
System.out.println(result.getResultCollectionInternal().get_Item(0).getData().toString());
- 合并插件
String input1 = "sample.pdf";
String input2 = "sample.pdf";
String output = "TestMergeFileAndStream_ResultAsFile.pdf";
Merger merger = new Merger();
MergeOptions opt = new MergeOptions();
opt.addInput(new FileDataSource(input1));
opt.addInput(new StreamDataSource(new FileInputStream(input2)));
opt.addOutput(new FileDataSource(output));
ResultContainer results = merger.process(opt);
System.out.println(results.getResultCollection().size());
System.out.println(results.getResultCollection().get(0).isFile());
- 优化器插件
如何减小 PDF 文档的大小？
String input = "Test.pdf";
String output = "Optimized.pdf";
Optimizer optimizer = new Optimizer();
OptimizeOptions opt = new OptimizeOptions();
opt.addInput(new FileDataSource(input));
opt.addOutput(new FileDataSource(output));
optimizer.process(opt);
如何调整 PDF 文档的大小？
String input = "sample.pdf";
String output = "ResizeMain.pdf";
Optimizer organizer = new Optimizer();
ResizeOptions opt = new ResizeOptions();
opt.addInput(new FileDataSource(input));
opt.addOutput(new FileDataSource(output));
opt.setPageSize(PageSize.getA1());
organizer.process(opt);
如何旋转 PDF 文档？
String input = "sample.pdf";
String output = "OptimizerRotateMain.pdf";
Optimizer optimizer = new Optimizer();
RotateOptions opt = new RotateOptions();
opt.addInput(new FileDataSource(input));
opt.addOutput(new FileDataSource(output));
opt.setRotation(Rotation.on90);
ResultContainer results = optimizer.process(opt);
Aspose.PDF 24.3 的新功能
从 24.3 实现了在 TextFragmentAbsorber 中对短语列表的搜索。
String[] expressions = new String[] {
//detect phone number
"\\b\\d{3}-\\d{3}-\\d{4}\\b",
//detect card number
"\\b(?:\\d[ -]*?){13,16}\\b"
};
Document document = new Document(input);
TextFragmentCollection newTextFragmentCollection = new TextFragmentCollection();
Pattern[] regexes = new Pattern[6];
for (int i = 0; i < expressions.length; i++) {
regexes[i] = Pattern.compile(expressions[i], Pattern.CASE_INSENSITIVE);
}
TextFragmentAbsorber newAbsorber = new TextFragmentAbsorber(regexes, new TextSearchOptions(true));
document.getPages().accept(newAbsorber);
HashMap < Pattern, TextFragmentCollection > map = newAbsorber.getRegexResults();
下一个功能是为 PDF 转 Markdown 转换器添加将表格转换的能力。
Document doc = new Document(dataDir + "56201.pdf");
MarkdownSaveOptions saveOptions = new MarkdownSaveOptions();
doc.save(dataDir + "56201.md", saveOptions);
Aspose.PDF 24.2 的新功能
从 24.2 开始，可在 PDF 中使用 AcroForm 添加 Watermark。TextStamp 适用于 AcroForm 文件。如果对 XFA 文件使用 TextStamp，文本会像普通 PDF 文件一样绘制在页面上（在无法读取 XFA 文件的 PDF 查看器中可见，例如 Chrome 浏览器）。若要向 XFA 文件添加文本，必须在 XFA 文件的内部 XML 中进行更改。
String sourceName = dataDir + "551.3xfa.pdf";
String targetName = dataDir + "output_2_" + BuildVersionInfo.AssemblyVersion + ".pdf";
Document pdfDocument = new Document(sourceName);
XFA xfa = pdfDocument.getForm().getXFA();
String watermark =
"<subform>" +
"<draw rotate=\"90\" x=\"100px\" y=\"100px\">" +
"<value>" +
"<text>Sample Stamp</text>\n" +
"</value>" +
"<font typeface=\"Arial\" size=\"14px\" weight=\"bold\" posture=\"italic\">" +
"<fill>" +
"<color value=\"0,128,0\"/>" +
"</fill>" +
"</font>" +
"</draw>" +
"</subform>";
xfa.appendToTemplate("//tpl:pageArea", watermark);
pdfDocument.save(targetName);
pdfDocument.close();
为注释设置 StateModel 我们可以使用 MarkupAnnotation 类的 setReviewState 和 setMarkedState 来设置所需的状态。 所有标记注释都提供 Set State 选项。
// Open the source PDF document
Document pdfDocument = new Document();
pdfDocument.getPages().add();
// Create annotation
TextAnnotation textAnnotation = new TextAnnotation(pdfDocument.getPages().get_Item(1), new Rectangle(200,
400, 400, 600));
//Set annotation title
textAnnotation.setTitle("Sample Annotation Title");
//Set annotation subject
textAnnotation.setSubject("Sample Subject");
//Specify the annotation contents
textAnnotation.setContents("Sample contents for the annotation");
textAnnotation.setOpen(true);
textAnnotation.setIcon(TextIcon.Key);
com.aspose.pdf.Border border = new com.aspose.pdf.Border(textAnnotation);
border.setWidth(5);
border.setDash(new Dash(1, 1));
textAnnotation.setBorder(border);
String userName1 = "Aspose1";
textAnnotation.setReviewState(AnnotationState.Rejected, userName1);
textAnnotation.setRect(new Rectangle(200, 400, 400, 600));
//Add annotation in the annotations collection of the page
pdfDocument.getPages().get_Item(1).getAnnotations().add(textAnnotation);
pdfDocument.processParagraphs();
//Save the output file
pdfDocument.save(dataDir + "output_24_2_Rejected.pdf");
pdfDocument = new Document(dataDir + "output" + version + "3.pdf");
TextAnnotation textAnnotation2 = (TextAnnotation) pdfDocument.getPages().get_Item(1).getAnnotations().get_Item(1);
String userName2 = "Aspose2";
textAnnotation2.setReviewState(AnnotationState.Accepted, userName2);
pdfDocument.save(dataDir + "output_24_2_Rejected_and_Accepted.pdf");
从 24.2 实现 OFD 到 PDF 转换：
Document document = new Document(inputPath, new OfdLoadOptions());
document.save(outputPath);
Aspose.PDF 24.1 的新增内容
从 24.1 版本开始实现 PDF 转 Markdown 转换：
final Document doc = new Document(inputPdfPath);
MarkdownSaveOptions saveOptions = new MarkdownSaveOptions();
saveOptions.setHeadingRecognitionStrategy(HeadingRecognitionStrategy.Outlines);
doc.save(markdownOutputFilePath, saveOptions);
此外，在 24.1 版本中，已实现使用 InterruptMonitor 的线程中断。
final InterruptMonitor monitor = new InterruptMonitor();
new Thread(new Runnable() {
public void run() {
InterruptMonitor.setThreadLocalInstance(monitor);
Document document = new Document();
try {
Page page = document.getPages().insert(1);
PageInfo pageInfo = page.getPageInfo();
pageInfo.setLandscape(true);
Table topicTable = new Table();
topicTable.setBorder(new BorderInfo(BorderSide.All, 0.5 f, Color.getBlack()));
topicTable.setDefaultCellBorder(new BorderInfo(BorderSide.All, 0.5 f, Color.getBlack()));
topicTable.setColumnWidths("5% 10% 5% 60% 10% 10%");
topicTable.setRepeatingRowsCount(1);
Row topicRow = topicTable.getRows().add();
topicRow.getCells().add("text");
topicRow.getCells().add("text");
topicRow.getCells().add("text");
topicRow.getCells().add("text");
topicRow.getCells().add("text");
topicRow.getCells().add("text");
//foreach to while statements conversion
Iterator tmp0 = (topicRow.getCells()).iterator();
while (tmp0.hasNext()) {
Cell cell = (Cell) tmp0.next();
cell.setVerticalAlignment(VerticalAlignment.Center);
cell.setAlignment(HorizontalAlignment.Center);
}
Row row2 = topicTable.getRows().add();
row2.getCells().add("text");
row2.getCells().add("text");
row2.getCells().add("text");
String LongText = "Lorem ipsum dolor sit amet, consectetuer adipiscing elit. Aenean commodo ligula eget dolor. Aenean massa. Cum sociis natoque penatibus et magnis dis parturient montes, nascetur ridiculus mus. Donec quam felis, ultricies nec, pellentesque eu, pretium quis, sem. Nulla consequat massa quis enim. Donec pede justo, fringilla vel, aliquet nec, vulputate eget, arcu. In enim justo, rhoncus ut, imperdiet a, venenatis vitae, justo. Nullam dictum felis eu pede mollis pretium. Integer tincidunt. Cras dapibus. Vivamus elementum semper nisi. Aenean vulputate eleifend tellus.";
row2.getCells().add(LongText);
row2.getCells().add("text");
row2.getCells().add("text");
page.getParagraphs().add(topicTable);
document.save(dataDir + "out" + version + ".pdf");
} catch (com.aspose.pdf.exceptions.OperationCanceledException ex) {
System.out.println("Interrupting the save thread at " + System.currentTimeMillis());
} finally {
if (document != null) {
document.close();
}
}
}
}).start();
System.out.println("Process is started thread at " + System.currentTimeMillis());
// The timeout should be less than the time required for full document save (without interruption).
Thread.sleep(500);
// Interrupt the process
monitor.interrupt();
System.out.println("Interrupted the save thread at " + System.currentTimeMillis());
Aspose.PDF 23.12 的新功能是什么
可以找到表单并使用以下代码片段替换文本：
Document document = new Document(input);
String expectedText = "This is a text added while creating new PDF in Kofx Power PDF Standard.";
XFormCollection forms = document.getPages().get_Item(1).getResources().getForms();
Iterator tmp0 = (forms).iterator();
while (tmp0.hasNext()) {
XForm form = (XForm) tmp0.next();
if ("Typewriter".equals(form.getIT()) && "Form".equals(form.getSubtype())) {
TextFragmentAbsorber absorber = new TextFragmentAbsorber();
absorber.visit(form);
Iterator tmp1 = (absorber.getTextFragments()).iterator();
while (tmp1.hasNext()) {
TextFragment fragment = (TextFragment) tmp1.next();
fragment.setText("");
}
}
}
document.save(output);
或者，可以完全删除该表单：
Document document = new Document(input);
XFormCollection forms = document.getPages().get_Item(1).getResources().getForms();
//foreach to while statements conversion
Iterator tmp0 = (forms).iterator();
while (tmp0.hasNext()) {
XForm form = (XForm) tmp0.next();
if ("Typewriter".equals(form.getIT()) && "Form".equals(form.getSubtype())) {
String name = forms.getFormName(form);
forms.delete(name);
}
}
document.save(output);
另一种删除表单的变体：
Document document = new Document(input);
XFormCollection forms = document.getPages().get_Item(1).getResources().getForms();
for (int i = 1; i <= forms.size(); i++) {
if ("Typewriter".equals(forms.get_Item(i).getIT()) && "Form".equals(forms.get_Item(i).getSubtype())) {
forms.delete(forms.get_Item(i).getName());
}
}
document.save(output);
- 可以使用以下代码片段删除所有表单：
Document document = new Document(input);
XFormCollection forms = document.getPages().get_Item(1).getResources().getForms();
forms.clear();
document.save(output);
Aspose.PDF 23.11 中的新功能
从此版本起，可以从 PDF 文件中删除隐藏文本：
Document document = new Document(inputFile);
TextFragmentAbsorber textAbsorber = new TextFragmentAbsorber();
textAbsorber.setTextReplaceOptions(new TextReplaceOptions(TextReplaceOptions.ReplaceAdjustment.None));
document.getPages().accept(textAbsorber);
msStringBuilder result = new msStringBuilder();
//foreach to while statements conversion
Iterator tmp0 = (textAbsorber.getTextFragments()).iterator();
while (tmp0.hasNext()) {
TextFragment fragment = (TextFragment) tmp0.next();
if (fragment.getTextState().isInvisible()) {
result.append(fragment.getText());
fragment.setText("");
}
}
document.save(outputFile);
Aspose.PDF 23.10 有哪些新功能
当前更新提供了三种从标记的 PDF 中删除标签的版本。
- 从 documentElement（根树元素）中移除某些节点元素：
Document document = new Document(inputPath);
RootElement structure = document.getLogicalStructure();
Element documentElement = structure.getChildren().get_Item(0);
Element structElement = (documentElement.getChildren().getCount() > 1) ? documentElement.getChildren().get_Item(1) : null;
documentElement.getChildren().remove(structElement);
// You can also delete the structElement itself
//if (structElement != null)
//{
// structElement.remove();
//}
document.save(outputPath);
- 从文档中移除所有已标记的元素标签，但保留结构元素：
Document document = new Document(inputPath);
RootElement structure = document.getLogicalStructure();
Element root= structure.getChildren().get_Item(0);
Queue<Element> queue = new ArrayDeque<Element>();
queue.add(root);
for (Element element : structure.getChildren() ) {
queue.add(element);
for (Element child : element.getChildren())
{
queue.add(child);
}
}
for (Element element:queue ) {
if (element instanceof TextElement || element instanceof FigureElement)
element.remove();
}
document.save(outputPath);
- 全部移除标签：
Document document = new Document(inputPath);
RootElement structure = document.getLogicalStructure();
Element root = structure.getChildren().get_Item(0);
root.remove();
document.save(outputPath);
我们已经实现了一个用于测量字符高度的新功能。使用以下代码来测量字符的高度：
Document doc = new Document("input.pdf");
TextFragmentAbsorber absorber = new TextFragmentAbsorber();
absorber.visit(doc.getPages().get_Item(1));
double height = absorber.getTextFragments().get_Item(1).getTextState().measureHeight('h')
请注意，测量基于文档中嵌入的字体。如果某个维度的信息缺失，此方法将返回 0。
Aspose.PDF 23.9 的新功能
从 23.9 开始支持从可填充字段中移除子注释。
示例 1：
String input = "55343_1.pdf";
Document doc = new Document(input);
final String fieldName = "1 Vehicle Identification Number";
Field field = (Field) doc.getForm().get_Item(fieldName);
System.out.println(0 == field.size());
Rectangle rect = field.getRect();
doc.getForm().addFieldAppearance(field, 2, rect);
System.out.println(2 == field.size());
field = (Field) doc.getForm().get_Item(fieldName);
System.out.println(2 == field.size());
doc.getForm().removeFieldAppearance(field, 1);
System.out.println(0 == field.size());
field = (Field) doc.getForm().get_Item(fieldName);
System.out.println(0 == field.size());
示例 2：
{
String option1 = "option 1";
String option2 = "option 2";
String outputPdf = "output.pdf";
final Document document = new Document();
try /*JAVA: was using*/ {
Page page = document.getPages().add();
CheckboxField checkbox = new CheckboxField(page, new Rectangle(50, 50, 70, 70));
// Set the first checkbox group option value
checkbox.setExportValue(option1);
checkbox.addOption(option2);
document.getForm().add(checkbox);
java.util.List < String > tmp0 = new ArrayList < String > ();
tmp0.add("Off");
tmp0.add(option1);
tmp0.add(option2);
System.out.println(collectionAssert_AreEqual(tmp0, checkbox.getAllowedStates()));
checkbox.setValue(option2);
WidgetAnnotation f = document.getForm().get_Item(1);
document.getForm().removeFieldAppearance((Field) f, 2);
checkbox = (CheckboxField) document.getForm().get_Item(1);
java.util.List < String > tmp1 = new java.util.ArrayList < String > ();
tmp1.add("Off");
tmp1.add(option1);
System.out.println(collectionAssert_AreEqual(tmp1, checkbox.getAllowedStates()));
document.save(outputPdf);
} finally {
if (document != null)(document).close();
}
}
public static boolean collectionAssert_AreEqual(java.util.List < String > value1,
java.util.List < String > value2) {
if (value1.size() == value2.size()) {
for (int i = 0; i < value1.size(); i++) {
if (!value1.get(i).equals(value2.get(i)))
return false;
}
} else {
return false;
}
return true;
}
使用 ImageFilterType.Flate 添加图像不会保留透明度。
Document document = new Document();
Page page = document.getPages().add();
FileInputStream stream = new FileInputStream(("55037_1.png"));
page.getResources().getImages().addWithImageFilterType(stream, ImageFilterType.Flate);
page.getContents().add(new GSave());
Rectangle rectangle = new Rectangle(413, 428, 548, 564);
Matrix matrix = new Matrix(
new double[] {
rectangle.getURX() - rectangle.getLLX(), 0, 0, rectangle.getURY() - rectangle.getLLY(), rectangle.getLLX(), rectangle.getLLY()
});
page.getContents().add(new ConcatenateMatrix(matrix));
XImage ximage = page.getResources().getImages().get_Item(page.getResources().getImages().size());
page.getContents().add(new Do(ximage.getName()));
page.getContents().add(new GRestore());
document.save(getOutputPath("55157.pdf"));
stream.close();
Aspose.PDF 23.8 中的新功能
在 23.8 版中，已添加用于检测 PDF 文档增量更新的函数。该函数在文档以增量更新方式保存时返回 ‘true’，否则返回 ‘false’。
Document doc = new Document(dataDir+"PDF_Support_Tech_Note.pdf");
boolean not_updatedIncrementally = doc.hasIncrementalUpdate();
System.out.println(not_updatedIncrementally);
doc.getPages().add();
doc.saveIncrementally(dataDir+"PDF_updatedIncrementally.pdf");
doc = new Document(dataDir+"PDF_updatedIncrementally.pdf");
boolean updatedIncrementally = doc.hasIncrementalUpdate();
System.out.println(updatedIncrementally);
doc.close();
再添加一个功能是将输入 PDF 的 OutputIntents 复制到目标 PDF。
我们新增了公共属性 Document.getOutputIntents()，以便访问文档中的输出意图。 目前仅支持使用文档中已存在的输出意图，用户无法从头创建 OutputIntent。
Document document1 = new Document(dataDir+"pdfa.pdf");
Document resultDocument = new Document();
resultDocument.getPages().add(document1.getPages());
for (OutputIntent intent : document1.getOutputIntents())
{
resultDocument.getOutputIntents().addItem(intent);
}
resultDocument.save(dataDir+"resultpath.pdf");
从 Aspose.PDF 23.8 开始支持添加形状提取：
{
String input1 = getInputPdf("46298_1");
String input2 = getInputPdf("46298_2");
Document source = new Document(input1);
Document dest = new Document(input2);
Page destPage = dest.getPages().get_Item(1);
TextFragmentAbsorber tfAbsorber = new TextFragmentAbsorber();
tfAbsorber.visit(source.getPages().get_Item(1));
//foreach to while statements conversion
Iterator tmp0 = ( tfAbsorber.getTextFragments()).iterator();
while (tmp0.hasNext())
{
TextFragment textFragment = (TextFragment)tmp0.next();
System.out.println(textFragment.getText());
addTextImproved(destPage, textFragment);
}
ImagePlacementAbsorber imageAbsorber = new ImagePlacementAbsorber();
imageAbsorber.visit(source);
Iterator tmp1 = ( imageAbsorber.getImagePlacements()).iterator();
while (tmp1.hasNext())
{
ImagePlacement image = (ImagePlacement)tmp1.next();
destPage.addImage(image.getImage().toStream(), image.getRectangle());
}
GraphicsAbsorber vectorAbsorber = new GraphicsAbsorber();
vectorAbsorber.visit(source.getPages().get_Item(1));
Rectangle area = new Rectangle(90, 250, 300, 400);
dest.getPages().get_Item(1).addGraphics(vectorAbsorber.getElements(), area);
dest.save(getOutputPath("46298-out.pdf"));
}
private static void addTextImproved(Page page, TextFragment textFragment)
{
TextFragment local = new TextFragment();
local.setPosition(textFragment.getPosition());
// Recalculate a new position since page size differs the originl PDF
local.getPosition().setXIndent(textFragment.getPosition().getXIndent());//2.5 * 72;
double newPageHeight = page.getPageRect(true).getHeight();
double oldPageHeight = textFragment.getPage().getPageRect(true).getHeight();
local.getPosition().setYIndent(textFragment.getPosition().getYIndent());
local.setText(textFragment.getText());
local.getTextState().setFont(textFragment.getTextState().getFont());
local.getTextState().setFontSize(textFragment.getTextState().getFontSize());
local.getTextState().setFormattingOptions(textFragment.getTextState().getFormattingOptions());
local.getTextState().setForegroundColor(textFragment.getTextState().getForegroundColor());
TextBuilder textBuilder = new TextBuilder(page);
textBuilder.appendText(local);
}
还支持在添加文本时检测溢出的功能：
Document doc = new Document();
String paragraphContent = "Lorem ipsum dolor sit amet, consectetur adipiscing elit. Cras nisl tortor, efficitur sed cursus in, lobortis vitae nulla. Quisque rhoncus, felis sed dictum semper, est tellus finibus augue, ut feugiat enim risus eget tortor. Nulla finibus velit nec ante gravida sollicitudin. Morbi sollicitudin vehicula facilisis. Vestibulum ac convallis erat. Ut eget varius sem. Nam varius pharetra lorem, id ullamcorper justo auctor ac. Integer quis erat vitae lacus mollis volutpat eget et eros. Donec a efficitur dolor. Maecenas non dapibus nisi, ut pellentesque elit. Sed pellentesque rhoncus ante, a consectetur ligula viverra vel. Integer eget bibendum ante. Pellentesque habitant morbi tristique senectus et netus et malesuada fames ac turpis egestas. Curabitur elementum, sem a auctor vulputate, ante libero iaculis dolor, vitae facilisis dolor lorem at orci. Sed laoreet dui id nisi accumsan, id posuere diam accumsan.";
Rectangle rectangle = new Rectangle(100, 600, 500, 700, false);
TextParagraph paragraph = new TextParagraph();
TextFragment fragment = new TextFragment(paragraphContent);
paragraph.setVerticalAlignment(VerticalAlignment.Top);
paragraph.getFormattingOptions().setWrapMode(TextFormattingOptions.WordWrapMode.ByWords);
paragraph.setRectangle(rectangle);
boolean isFitRectangle = fragment.getTextState().isFitRectangle(paragraphContent, rectangle);
while (!isFitRectangle)
{
fragment.getTextState().setFontSize(fragment.getTextState().getFontSize() - 0.5f);
isFitRectangle = fragment.getTextState().isFitRectangle(paragraphContent, rectangle);
}
paragraph.appendLine(fragment);
TextBuilder builder = new TextBuilder(doc.getPages().add());
builder.appendParagraph(paragraph);
doc.save(output);
Aspose.PDF 23.7 中的新功能
从 23.7 版本起支持打印对话框预设页面缩放：
Document document = new Document();
document.getPages().add();
document.setPrintScaling(PrintScaling.None);//PrintScaling.Default
document.save(outputPdf);
Document documentOutput = new Document(outputPdf);
int printScaling = documentOutput.getPrintScaling();
System.out.println("PrintScaling: " + printScaling);
Aspose.PDF 23.6 有哪些新功能
从 23.6 版本开始，支持添加设置 HTML、Epub 页面标题的功能。
HTML 代码：
HtmlSaveOptions options = new HtmlSaveOptions();
options.setFixedLayout(true);
options.setRasterImagesSavingMode(HtmlSaveOptions.RasterImagesSavingModes.AsEmbeddedPartsOfPngPageBackground);
options.setPartsEmbeddingMode(HtmlSaveOptions.PartsEmbeddingModes.EmbedAllIntoHtml);
options.setTitle("</title>NEW PAGE & TITILE</head>");
Document document = new Document(inputPath);
document.save(outPath, options);
EPUB 的代码:
EpubSaveOptions epubSaveOptions = new EpubSaveOptions();
epubSaveOptions.setTitle("</title>NEW PAGE & TITILE</head>");
epubSaveOptions.setContentRecognitionMode(EpubSaveOptions.RecognitionMode.PdfFlow);
Document document = new Document(inputPath);
document.save(outPath, epubSaveOptions);
从 23.6 版起支持提供用于定位矢量图形的 API：
Document document = new Document(input);
VectorGraphicsAbsorber vectorAbsorber = new VectorGraphicsAbsorber();
vectorAbsorber.visit(document.getPages().get_Item(1));
SubPath subPath1 = vectorAbsorber.getSubPaths().get_Item(2);
SubPath subPath2 = vectorAbsorber.getSubPaths().get_Item(3);
SubPath subPath3 = vectorAbsorber.getSubPaths().get_Item(4);
Point point1 = new Point(subPath1.getPosition().getX() + 200, subPath1.getPosition().getY() - 100);
Point point2 = new Point(subPath2.getPosition().getX() + 200, subPath2.getPosition().getY() - 100);
Point point3 = new Point(subPath3.getPosition().getX() + 200, subPath3.getPosition().getY() - 100);
subPath1.setPosition(point1);
subPath2.setPosition(point2);
subPath3.setPosition(point3);
document.save(output);
Aspose.PDF 23.1 的新功能
从 23.1 版本开始支持创建 PrinterMark 注释。新增了一种注释变体：ColorBarAnnotation。
Document doc = new Document();
Page page = doc.getPages().add();
page.setTrimBox(new com.aspose.pdf.Rectangle(20, 20, 580, 820));
Rectangle rectBlack = new com.aspose.pdf.Rectangle(100, 300, 300, 320);
Rectangle rectCyan = new com.aspose.pdf.Rectangle(200, 600, 260, 690);
Rectangle rectMagenta = new com.aspose.pdf.Rectangle(10, 650, 140, 670);
ColorBarAnnotation colorBarBlack = new ColorBarAnnotation(page, rectBlack);
ColorBarAnnotation colorBarCyan = new ColorBarAnnotation(page, rectCyan, ColorsOfCMYK.Cyan);
ColorBarAnnotation colorBaMagenta = new ColorBarAnnotation(page, rectMagenta);
colorBaMagenta.setColorOfCMYK(ColorsOfCMYK.Magenta);
ColorBarAnnotation colorBarYellow = new ColorBarAnnotation(page, new com.aspose.pdf.Rectangle(400, 250, 450, 700), ColorsOfCMYK.Yellow);
page.getAnnotations().add(colorBarBlack);
page.getAnnotations().add(colorBarCyan);
page.getAnnotations().add(colorBaMagenta);
page.getAnnotations().add(colorBarYellow);
doc.save("outFile.pdf");
Aspose.PDF 22.12 新功能
此版本支持将 PDF 转换为 DICOM 图像：
DicomDevice device = new DicomDevice(PageSize.getA4());
Document doc = new Document("Input.pdf");
ByteArrayOutputStream stream = new ByteArrayOutputStream();
device.process(doc.getPages().get_Item(1), stream);
Aspose.PDF 22.9 新功能
从 22.09 版本开始，支持添加属性来修改签名中主题项 (E=, CN=, O=, OU=) 的顺序。
String inputPdf = getInputPath("input.pdf");
String inputPfx = getInputPath("input.pfx");
String outputPdf = getOutputPath("out.pdf");
final PdfFileSignature fileSign = new PdfFileSignature();
try
{
fileSign.bindPdf(inputPdf);
java.awt.Rectangle rect = new java.awt.Rectangle(100, 100, 400, 100);
PKCS7Detached signature = new PKCS7Detached(inputPfx, "123456789");
signature.setDate(new Date());
signature.setCustomAppearance( new SignatureCustomAppearance());
signature.getCustomAppearance().setUseDigitalSubjectFormat(true);
signature.getCustomAppearance().setDigitalSubjectFormat(new /*SubjectNameElements*/int[] { SubjectNameElements.CN, SubjectNameElements.O });
fileSign.sign(1, true, rect, signature);
fileSign.save(outputPdf);
}
finally {
if (fileSign != null)
fileSign.close();
}
Aspose.PDF 22.8 的新功能
从 Aspose.PDF 23.8 开始，支持添加用于重建 xref 表的方法：
PdfFileSanitization sanitizer = new PdfFileSanitization();
try {
sanitizer.bindPdf(dataDir + "50528_1.pdf");
sanitizer.rebuildXrefAndTrailer();
sanitizer.save(dataDir + "50528_1" + version + ".pdf");
} finally {
if (sanitizer != null) ( sanitizer).close();
}
Aspose.PDF 22.6 的新功能
PDF 转 PDF_A_1A - 实现移除透明颜色的选项，以避免生成的文件体积过大。
从版本 22.5 起，客户能够控制转换后透明度的质量，并相应地控制输出文件的大小：
opts.setTransparencyResolution(300);
Aspose.PDF 22.5 的新功能
在 PDF/A 转换过程中，透明内容会被移除并替换为图像。 我们已经实现了一个新功能，现在客户可以使用参数 TransparencyResolution 来控制图像的质量：
com.aspose.pdf.Document pdfDocument = new com.aspose.pdf.Document("input.pdf");
PdfFormatConversionOptions options = new PdfFormatConversionOptions("log.xml", PdfFormat.PDF_A_1A, ConvertErrorAction.Delete);
options.setTransparencyResolution(300);
pdfDocument.convert(options);
pdfDocument.save("finalOutput.pdf");
Aspose.PDF 22.4 的新功能
此发布包含 Aspose.PDF for Java 的信息：
- PDF 转 ODS：Recognize text in subscript and superscript;
示例
Document pdfDocument = new Document("Superscript-Subscript.pdf");
ExcelSaveOptions options = new ExcelSaveOptions();
options.Format = ExcelSaveOptions.ExcelFormat.ODS;
pdfDocument.Save("output.ods"), options);
-
PDF 转 XMLSpreadSheet2003：识别下标和上标中的文本；
-
PDF 转 Excel：识别下标和上标中的文本；
Aspose.PDF 22.3 的新增功能
PDF 转 ODS：在 22.3 版本中支持 RTL
ExcelSaveOptions options = new ExcelSaveOptions();
options.setFormat(ExcelSaveOptions.ExcelFormat.ODS);
pdfDocument.save("output.ods", options);
Aspose.PDF 22.2 的新功能
此版本包括 PDF 转 XSLX：支持 RTL（希伯来语、阿拉伯语）。
Aspose.PDF 22.1 中的新功能
Aspose.PDF for Java 允许加载 Portable Document Format (PDF) 2.0 版本的文档。
Aspose.PDF 21.10 的新功能
检测隐藏文本
请使用以下代码：
Document pdf = new Document(inFile);
Page page = pdf.getPages().get_Item(1);
TextFragmentAbsorber textFragmentAbsorber = new com.aspose.pdf.TextFragmentAbsorber();
page.accept(textFragmentAbsorber);
TextFragmentCollection textFragmentCollection = textFragmentAbsorber.getTextFragments();
int fragmentsCount = textFragmentAbsorber.getTextFragments().size();
int invisibleCount = 0;
Iterator tmp0 = ( textFragmentCollection).iterator();
while (tmp0.hasNext())
{
com.aspose.pdf.TextFragment fragment = (com.aspose.pdf.TextFragment)tmp0.next();
System.out.println(fragment.getText());
System.out.println(fragment.getTextState().isInvisible());
if (fragment.getTextState().isInvisible())
invisibleCount++;
}
Aspose.PDF 21.8 的新功能
更改数字签名中的文字颜色
在 21.8 版本中，setForegroundColor 允许更改数字签名中的文字颜色：
Please, use the following code:
PdfFileSignature pdfSign = new PdfFileSignature();
pdfSign.bindPdf(inFile);
//create a rectangle for signature location
java.awt.Rectangle rect = new java.awt.Rectangle(310, 45, 200, 50);
PKCS7 pkcs = new PKCS7(inPfxFile, "");
pkcs.setCustomAppearance( new SignatureCustomAppearance());
//set text color
pkcs.getCustomAppearance().setForegroundColor(Color.getGreen());
// sign the PDF file
pdfSign.sign(1, true, rect, pkcs);
//save output PDF file
pdfSign.save(outFile);
Aspose.PDF 21.6 的新功能
使用 ImagePlacementAbsorber 从文档中隐藏图像
使用 Aspose.PDF for Java，您可以通过 ImagePlacementAbsorber 从文档中隐藏图像：
Document doc = new Document("input.pdf");
for (Page page : doc.getPages()) {
ImagePlacementAbsorber ipa = new ImagePlacementAbsorber();
ipa.visit(page);
for (ImagePlacement ip : ipa.getImagePlacements()) {
ip.hide();
}
}
doc.save("out.pdf");
Aspose.PDF 21.5 的新功能
添加合并图像的 API
Aspose.PDF 21.4 允许您合并图像。将图像流列表合并为一个图像流。支持 PNG、JPG、TIFF 输出格式；如果使用不受支持的格式，输出流将默认编码为 JPEG。 请参阅以下代码片段：
InputStream inputStream;
ArrayList<InputStream> inputImagesStreams = new ArrayList<InputStream>();
InputStream inputFile300dpi = new FileInputStream("image1.jpg");
try {
inputImagesStreams.add(inputFile300dpi);
InputStream inputFile600dpi = new FileInputStream("image2.jpg");
try {
inputImagesStreams.add(inputFile600dpi);
inputStream = PdfConverter.mergeImages(
inputImagesStreams,
com.aspose.pdf.ImageFormat.Jpeg,
ImageMergeMode.Vertical,
new Integer(1),
new Integer(1)
);
} finally {
if (inputFile600dpi != null) (inputFile600dpi).close();
}
} finally {
if (inputFile300dpi != null) (inputFile300dpi).close();
}
Document doc = new Document();
Page p = doc.getPages().add();
Image image = new Image();
image.setImageStream(inputStream);
p.getParagraphs().add(image);
doc.save("out.pdf");
inputStream.close();
另外，您可以将图像合并为 Tiff 格式：
InputStream inputStream;
ArrayList<InputStream> inputImagesStreams = new ArrayList<InputStream>();
InputStream inputFile1 = new FileInputStream("1.tif");
try {
inputImagesStreams.add(inputFile1);
InputStream inputFile2 = new FileInputStream("2.tif");
try {
inputImagesStreams.add(inputFile2);
inputStream = PdfConverter.mergeImagesAsTiff(inputImagesStreams);
} finally {
if (inputFile2 != null) (inputFile2).close();
}
} finally {
if (inputFile1 != null) (inputFile1).close();
}
Document doc = new Document();
Page p = doc.getPages().add();
Image image = new Image();
image.setImageStream(inputStream);
p.getParagraphs().add(image);
doc.save("out2.pdf");
inputStream.close();
Aspose.PDF 21.02 的新功能
Aspose.PDF v21.02 使用 PAdES LTV 签名对 PDF 进行签署
final Document document = new Document(inputPdf);
try
{
PdfFileSignature signature = new PdfFileSignature(document);
PKCS7 pkcs7 = new PKCS7(getInputPath("cert.pfx"), "password");
//Sign PDF with PAdES LTV Signatures
pkcs7.setUseLtv(true);
signature.sign(1, true, new Rectangle(100, 100, 300, 300), pkcs7);
signature.save(outputPdf);
}
finally { if (document != null) (document).dispose(); }