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 block

e.printStackTrace();

}

}

public void editPDF() {

try {

// pdfwithText

PDDocument 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 block

e.printStackTrace();

} catch (COSVisitorException e) {

// TODO Auto-generated catch block

e.printStackTrace();

}

}

public static void main(String[] args) {

new PDFReader();

}

}