Java使用PDFBox开发包实现对PDF文档内容编辑与保存

pdfbox开发包下载地址：http://pdfbox.apache.org/

程序实现了PDF文档的创建，读入，与修改PDF内容并保存。

可能有个前提，PDF文档不是加密的，如果加密怎么办，我没研究过！

源代码如下：

package com.gloomyfish.ups.pdf.reader;import java.io.File;import java.io.IOException;import java.io.OutputStream;import java.util.List;import org.apache.pdfbox.cos.COSArray;import org.apache.pdfbox.cos.COSString;import org.apache.pdfbox.exceptions.COSVisitorException;import org.apache.pdfbox.pdfparser.PDFStreamParser;import org.apache.pdfbox.pdfwriter.ContentStreamWriter;import org.apache.pdfbox.pdmodel.PDDocument;import org.apache.pdfbox.pdmodel.PDPage;import org.apache.pdfbox.pdmodel.common.PDStream;import org.apache.pdfbox.pdmodel.edit.PDPageContentStream;import org.apache.pdfbox.pdmodel.font.PDFont;import org.apache.pdfbox.pdmodel.font.PDType1Font;import org.apache.pdfbox.util.PDFOperator;import org.apache.pdfbox.util.PDFTextStripper;/** * http://pdfbox.apache.org/ *  * @author fish *  */public class PDFReader {public PDFReader(){createHelloPDF();readPDF();editPDF();}public void createHelloPDF() {PDDocument doc = null;PDPage page = null;try {doc = new PDDocument();page = new PDPage();doc.addPage(page);PDFont font = PDType1Font.HELVETICA_BOLD;PDPageContentStream content = new PDPageContentStream(doc, page);content.beginText();content.setFont(font, 12);content.moveTextPositionByAmount(100, 700);content.drawString("Hello");content.endText();content.close();doc.save("D:\\gloomyfish\\pdfwithText.pdf");doc.close();} catch (Exception e) {System.out.println(e);}}public void readPDF(){PDDocument helloDocument;try {helloDocument = PDDocument.load(new File("D:\\gloomyfish\\pdfwithText.pdf"));PDFTextStripper textStripper = new PDFTextStripper();System.out.println(textStripper.getText(helloDocument));helloDocument.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public void editPDF() { try {// pdfwithTextPDDocument helloDocument = PDDocument.load(new File("D:\\gloomyfish\\pdfwithText.pdf"));// PDDocument helloDocument = PDDocument.load(new File("D:\\gloomyfish\\hello.pdf"));// int pageCount = helloDocument.getNumberOfPages();PDPage firstPage = (PDPage)helloDocument.getDocumentCatalog().getAllPages().get(0);// PDPageContentStream content = new PDPageContentStream(helloDocument, firstPage);PDStream contents = firstPage.getContents();PDFStreamParser parser = new PDFStreamParser(contents.getStream());              parser.parse();              List tokens = parser.getTokens();              for (int j = 0; j < tokens.size(); j++)              {                  Object next = tokens.get(j);                  if (next instanceof PDFOperator)                  {                  PDFOperator op = (PDFOperator) next;                      // Tj and TJ are the two operators that display strings in a PDF                      if (op.getOperation().equals("Tj"))                      {                          // Tj takes one operator and that is the string                          // to display so lets update that operator                          COSString previous = (COSString) tokens.get(j - 1);                          String string = previous.getString();                          string = string.replaceFirst("Hello", "Hello World, fish");                          //Word you want to change. Currently this code changes word "Solr" to "Solr123"                          previous.reset();                          previous.append(string.getBytes("ISO-8859-1"));                      }                      else if (op.getOperation().equals("TJ"))                      {                          COSArray previous = (COSArray) tokens.get(j - 1);                          for (int k = 0; k < previous.size(); k++)                          {                              Object arrElement = previous.getObject(k);                              if (arrElement instanceof COSString)                              {                                  COSString cosString = (COSString) arrElement;                                  String string = cosString.getString();                                  string = string.replaceFirst("Hello", "Hello World, fish");                                                                  // Currently this code changes word "Solr" to "Solr123"                                  cosString.reset();                                  cosString.append(string.getBytes("ISO-8859-1"));                              }                          }                      }                  }            }            // now that the tokens are updated we will replace the page content stream.              PDStream updatedStream = new PDStream(helloDocument);              OutputStream out = updatedStream.createOutputStream();              ContentStreamWriter tokenWriter = new ContentStreamWriter(out);              tokenWriter.writeTokens(tokens);              firstPage.setContents(updatedStream);              helloDocument.save("D:\\gloomyfish\\helloworld.pdf"); //Output file name              helloDocument.close();//PDFTextStripper textStripper = new PDFTextStripper();//System.out.println(textStripper.getText(helloDocument));//helloDocument.close();} catch (IOException e) {// TODO Auto-generated catch blocke.printStackTrace();} catch (COSVisitorException e) {// TODO Auto-generated catch blocke.printStackTrace();}}public static void main(String[] args) {new PDFReader();}}

别人失去了信心，他却下决心实现自己的目标。