通过 Java PDF API 创建、解析和转换 PDF

Aspose.Pdf for Java 的 Maven 存储库

 //First you need to specify Aspose Repository configuration / location in your Maven pom.xml as follows:

<repositories>
	<repository>
	<id>AsposeJavaAPI</id>
	<name>Aspose Java API</name>
	<url>https://releases.aspose.com/java/repo/</url>
	</repository>
</repositories>

//Define Aspose.PDF for Java API Dependency

<dependencies>
	<dependency>
	<groupId>com.aspose</groupId>
	<artifactId>aspose-pdf</artifactId>
	<version>21.7</version>
	</dependency>
</dependencies>

您可以直接从Aspose.PDF产品页面

通过 Java 使用 Control Column 将 PDF 转换为 XLS

    public static void ConvertPDFtoExcelAdvanced_InsertBlankColumnAtFirst() {
        // Load PDF document
        Document pdfDocument = new Document(_dataDir + "input.pdf");
        // Instantiate ExcelSave Option object
        ExcelSaveOptions excelsave = new ExcelSaveOptions();
        excelsave.setInsertBlankColumnAtFirst(false);
        // Save the output in XLS format
        pdfDocument.save("PDFToXLS_out.xls", excelsave);
    }

通过 Java API 从 PDF 文件中提取图像

public static void Extract_Images(){
       // The path to the documents directory.
       String _dataDir = "/home/admin1/pdf-examples/Samples/";
       String filePath = _dataDir + "ExtractImages.pdf";

       // Load PDF document
       com.aspose.pdf.Document pdfDocument = new com.aspose.pdf.Document(filePath);

       com.aspose.pdf.Page page = pdfDocument.getPages().get_Item(1);
       com.aspose.pdf.XImageCollection xImageCollection = page.getResources().getImages();
       // Extract a particular image
       com.aspose.pdf.XImage xImage = xImageCollection.get_Item(1);

       try {
           java.io.FileOutputStream outputImage = new java.io.FileOutputStream(_dataDir + "output.jpg");
           // Save output image
           xImage.save(outputImage);
           outputImage.close();
       } catch (java.io.FileNotFoundException e) {
           // TODO: handle exception
           e.printStackTrace();
       } catch (java.io.IOException e) {
           // TODO: handle exception
           e.printStackTrace();
       }
   }

通过Java API创建圆角表格

 public static void RoundedBorderRadius() {
        Document doc = new Document();
        Page page = doc.getPages().add();

        // Instantiate a table object
        Table tab1 = new Table();

        // Add the table in paragraphs collection of the desired section
        page.getParagraphs().add(tab1);

        GraphInfo graph = new GraphInfo();
        graph.setColor(Color.getRed());
        // Create a blank BorderInfo object
        BorderInfo bInfo = new BorderInfo(BorderSide.All, graph);
        // Set the border a rounder border where radius of round is 15
        bInfo.setRoundedBorderRadius(15);
        // Set the table Corner style as Round.
        tab1.setCornerStyle(BorderCornerStyle.Round);
        // Set the table border information
        tab1.setBorder(bInfo);
        // Create rows in the table and then cells in the rows
        Row row1 = tab1.getRows().add();
        row1.getCells().add("col1");
        row1.getCells().add("col2");
        row1.getCells().add();

        TextFragment mytext = new TextFragment("col3 with large text string");

        row1.getCells().get_Item(2).getParagraphs().add(mytext);
        row1.getCells().get_Item(2).setWordWrapped(false);

        Row row2 = tab1.getRows().add();
        row2.getCells().add("item1");
        row2.getCells().add("item2");
        row2.getCells().add("item3");

        // Save the PDF
        doc.save(_dataDir + "BorderRadius_out.pdf");
    }

如何通过 Java API 在现有 PDF 中添加图像？

 
    public static void AddImageInAnExistingPDFFile_Facades() {
        // Open document
        PdfFileMend mender = new PdfFileMend();

        // Create PdfFileMend object to add text
        mender.bindPdf(_dataDir + "AddImage.pdf");

        // Add image in the PDF file
        mender.addImage(_dataDir + "aspose-logo.jpg", 1, 100, 600, 200, 700);

        // Save changes
        mender.save(_dataDir + "AddImage_out.pdf");

        // Close PdfFileMend object
        mender.close();
    }