此演示向您展示如何将 PDF 文档转换为 Docx、XPS、HTML、图像等。

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DOCXDOCXLSXXPSPOSTSCRIPTHTMLIMAGESVGTIFFPDFA1APDFA1BPDFA2APDFA2BPDFA3APDFA3B

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import com.spire.pdf.FileFormat;import com.spire.pdf.PdfDocument;import com.spire.pdf.conversion.PdfStandardsConverter;import com.spire.pdf.graphics.PdfImageType;import javax.imageio.ImageIO;import java.awt.image.BufferedImage;import java.io.File;import java.io.IOException;public class PdfConvertDemo{public void pdfConversion(String pdfFile,String convertType) throws IOException{String outputFileName = "output";PdfDocument pdf=new PdfDocument();pdf.loadFromFile(pdfFile);PdfStandardsConverter standardsConverter = new PdfStandardsConverter(pdfFile);switch (convertType){case "DOCX":outputFileName += ".docx";pdf.saveToFile(outputFileName,FileFormat.DOCX);break;case "DOC":outputFileName += ".doc";pdf.saveToFile(outputFileName,FileFormat.DOC);break;case "XPS":outputFileName += ".xps";pdf.saveToFile(outputFileName,FileFormat.XPS);break;case "XLSX":outputFileName += ".xlsx";pdf.saveToFile(outputFileName,FileFormat.XLSX);break;case "POSTSCRIPT":outputFileName += ".ps";pdf.saveToFile(outputFileName,FileFormat.POSTSCRIPT);break;case "HTML":outputFileName += ".html";pdf.saveToFile(outputFileName,FileFormat.HTML);break;case "IMAGE":BufferedImage image=null;for (int i = 0;i < pdf.getPages().getCount();i++){image= pdf.saveAsImage(i,PdfImageType.Bitmap);ImageIO.write(image,"PNG",new File(outputFileName+i+".png"));}break;case "SVG":outputFileName+=".svg";pdf.saveToFile(outputFileName,FileFormat.SVG);break;case "TIFF":outputFileName += ".tiff";pdf.saveToTiff(outputFileName);break;case "PDFA1A":outputFileName += ".pdf";standardsConverter.toPdfA1A(outputFileName);break;case "PDFA1B":outputFileName += ".pdf";standardsConverter.toPdfA1B(outputFileName);break;case "PDFA2A":outputFileName += ".pdf";standardsConverter.toPdfA2A(outputFileName);break;case "PDFA2B":outputFileName += ".pdf";standardsConverter.toPdfA2B(outputFileName);break;case "PDFA3A":outputFileName += ".pdf";standardsConverter.toPdfA3A(outputFileName);break;case "PDFA3B":outputFileName += ".pdf";standardsConverter.toPdfA3B(outputFileName);break;}pdf.close();}}

using Spire.Pdf;using Spire.Pdf.Conversion;using Spire.Pdf.Graphics;using System;using System.Drawing;using System.Drawing.Imaging;namespace DemoOnlineCode{class PdfConvertDemo{public void PdfConversions(string pdfFile,string convertType){String outputFileName = "output";PdfDocument pdf = new PdfDocument();pdf.LoadFromFile(pdfFile);PdfStandardsConverter standardsConverter = new PdfStandardsConverter(pdfFile);switch (convertType){case "DOCX":outputFileName += ".docx";pdf.SaveToFile(outputFileName,FileFormat.DOCX);break;case "DOC":outputFileName += ".doc";pdf.SaveToFile(outputFileName,FileFormat.DOC);break;case "XPS":outputFileName += ".xps";pdf.SaveToFile(outputFileName,FileFormat.XPS);break;case "XLSX":outputFileName += ".xlsx";pdf.SaveToFile(outputFileName,FileFormat.XLSX);break;case "POSTSCRIPT":outputFileName += ".ps";pdf.SaveToFile(outputFileName,FileFormat.POSTSCRIPT);break;case "HTML":outputFileName += ".html";pdf.ConvertOptions.SetPdfToHtmlOptions(true,false,1,false);pdf.SaveToFile(outputFileName,FileFormat.HTML);break;case "IMAGE":Image image = null;for (int i = 0;i < pdf.Pages.Count;i++){image = pdf.SaveAsImage(i,PdfImageType.Bitmap);image.Save(outputFileName + i + ".png",ImageFormat.Png);}break;case "SVG":outputFileName += ".svg";pdf.SaveToFile(outputFileName,FileFormat.SVG);break;case "TIFF":outputFileName += ".tiff";JoinTiffImages(SaveAsImage(pdf),outputFileName,EncoderValue.CompressionLZW);break;case "PDFA1A":outputFileName += ".pdf";standardsConverter.ToPdfA1A(outputFileName);break;case "PDFA1B":outputFileName += ".pdf";standardsConverter.ToPdfA1B(outputFileName);break;case "PDFA2A":outputFileName += ".pdf";standardsConverter.ToPdfA2A(outputFileName);break;case "PDFA2B":outputFileName += ".pdf";standardsConverter.ToPdfA2B(outputFileName);break;case "PDFA3A":outputFileName += ".pdf";standardsConverter.ToPdfA3A(outputFileName);break;case "PDFA3B":outputFileName += ".pdf";standardsConverter.ToPdfA3B(outputFileName);break;}pdf.Close();}private static Image[] SaveAsImage(PdfDocument document){Image[] images = new Image[document.Pages.Count];for (int i = 0;i < document.Pages.Count;i++){//Use the document.SaveAsImage() method save the pdf as image images[i] = document.SaveAsImage(i);}return images;}private static ImageCodecInfo GetEncoderInfo(string mimeType){ImageCodecInfo[] encoders = ImageCodecInfo.GetImageEncoders();for (int j = 0;j < encoders.Length;j++){if (encoders[j].MimeType == mimeType) return encoders[j];}throw new Exception(mimeType + " mime type not found in ImageCodecInfo");}public static void JoinTiffImages(Image[] images,string outFile,EncoderValue compressEncoder){//Use the save encoder System.Drawing.Imaging.Encoder enc = System.Drawing.Imaging.Encoder.SaveFlag;EncoderParameters ep = new EncoderParameters(2);ep.Param[0] = new EncoderParameter(enc,(long)EncoderValue.MultiFrame);ep.Param[1] = new EncoderParameter(System.Drawing.Imaging.Encoder.Compression,(long)compressEncoder);Image pages = images[0];int frame = 0;ImageCodecInfo info = GetEncoderInfo("image/tiff");foreach (Image img in images){if (frame == 0){pages = img;//Save the first frame pages.Save(outFile,info,ep);}else{//Save the intermediate frames ep.Param[0] = new EncoderParameter(enc,(long)EncoderValue.FrameDimensionPage);pages.SaveAdd(img,ep);}if (frame == images.Length - 1){//Flush and close. ep.Param[0] = new EncoderParameter(enc,(long)EncoderValue.Flush);pages.SaveAdd(ep);}frame++;}}}}