eclipse java中pdfbox处理pdf常用方法(读取、写入、合并、拆分、写文字、写图片)

本篇文档将介绍pdfbox处理pdf常用方法(读取、写入、合并、拆分、写文字、写图片)。

图中为pdfbox用到的包

1.读取pdf

方法代码：

/**

* 读取pdf中文字信息(全部)

* @param inputFile

* @return

*/

public static String ReadPdf(String inputFile){

//创建文档对象

PDDocument doc =null;

String content="";

try {

//加载一个pdf对象

doc =PDDocument.load(new File(inputFile));

//获取一个PDFTextStripper文本剥离对象

PDFTextStripper textStripper =new PDFTextStripper();

content=textStripper.getText(doc);

System.out.println("内容:"+content);

System.out.println("全部页数"+doc.getNumberOfPages());

//关闭文档

doc.close();

} catch (Exception e) {

e.printStackTrace();

}

return content;

}

测试用例：

public static void main(String[] args) throws Exception {

String content = ReadPdf("C:\\pdfFolder\\target.pdf");

System.out.println("内容如下：\n" + content);

}

2.写入pdf

2.1写文字

方法代码：

/**

* 指定页插入一段文字

* @param inputFilePath

* @param outputFilePath

* @param pageNum

* @param message

* @throws Exception

*/

public static void InsertPageContent (String inputFilePath, String outputFilePath, Integer pageNum, String message) throws Exception {

File inputPDFFile = new File(inputFilePath);

File outputPDFFile = new File(outputFilePath);

// the document

PDDocument doc = null;

try{

doc = PDDocument.load(inputPDFFile);

PDPageTree allPages = doc.getDocumentCatalog().getPages();

PDFont font = PDType1Font.HELVETICA_BOLD;

//字体大小

float fontSize = 36.0f;

PDPage page = (PDPage)allPages.get(pageNum - 1);

PDRectangle pageSize = page.getMediaBox();

float stringWidth = font.getStringWidth(message)*fontSize/1000f;

// calculate to center of the page

int rotation = page.getRotation();

boolean rotate = rotation == 90 || rotation == 270;

float pageWidth = rotate ? pageSize.getHeight() : pageSize.getWidth();

float pageHeight = rotate ? pageSize.getWidth() : pageSize.getHeight();

double centeredXPosition = rotate ? pageHeight/2f : (pageWidth - stringWidth)/2f;

double centeredYPosition = rotate ? (pageWidth - stringWidth)/2f : pageHeight/2f;

// append the content to the existing stream

PDPageContentStream contentStream = new PDPageContentStream(doc, page, true, true,true);

contentStream.beginText();

// set font and font size

contentStream.setFont( font, fontSize );

// set text color to red

contentStream.setNonStrokingColor(255, 0, 0);

if (rotate) {

// rotate the text according to the page rotation

contentStream.setTextRotation(Math.PI/2, centeredXPosition, centeredYPosition);

} else {

contentStream.setTextTranslation(centeredXPosition, centeredYPosition);

}

contentStream.drawString(message);

contentStream.endText();

contentStream.close();

doc.save(outputPDFFile);

System.out.println("成功向pdf插入文字");

} finally {

if( doc != null ) {

doc.close();

}

}

}

测试用例：

public static void main(String[] args) throws Exception {

String inputFilePath = "C:\\pdfFolder\\A.pdf";

String outputFilePath = "C:\\pdfFolder\\A2.pdf";

        //只能写英文，写中文会报错

InsertPageContent(inputFilePath, outputFilePath, 1, "testMessage");

}

A.pdf:

A2.pdf:

2.2写图片

方法代码：

/**

* 在pdf中插入图片

* @param inputFilePath

* @param imagePath

* @param outputFilePath

* @param pageNum

* @throws Exception

*/

public static void insertImage(String inputFilePath, String imagePath, String outputFilePath, Integer pageNum) throws Exception {

File inputPDFFile = new File(inputFilePath);

File outputPDFFile = new File(outputFilePath);

try {

PDDocument doc = PDDocument.load(inputPDFFile);

PDImageXObject pdImage = PDImageXObject.createFromFile(imagePath, doc);

PDPage page = doc.getPage(0);

//注释的这行代码会覆盖原内容，没注释的那行不会覆盖

// PDPageContentStream contentStream = new PDPageContentStream(doc, page);

PDPageContentStream contentStream = new PDPageContentStream(doc, page, true, true, true);

contentStream.drawImage(pdImage, 70, 250);

contentStream.close();

doc.save(outputPDFFile);

doc.close();

System.out.println("成功插入图片");

} catch (IOException e) {

e.printStackTrace();

}

}

测试用例：

public static void main(String[] args) throws Exception {

String inputFilePath = "C:\\pdfFolder\\A.pdf";

String outputFilePath = "C:\\pdfFolder\\A2.pdf";

String imagePath = "C:\\pdfFolder\\pic.jpg";

insertImage(inputFilePath, imagePath, outputFilePath, 1);

}

A.pdf:

pic.jpg:

A2.pdf:

3.合并pdf

方法代码：

/**

*

* @param pathList

* @param targetPDFPath

* @throws Exception

*/

public static void MergePdf(List pathList, String targetPDFPath) throws Exception {

List inputStreams = new ArrayList<>();

for(String path : pathList) {

inputStreams.add(new FileInputStream(new File(path)));

}

PDFMergerUtility mergePdf = new PDFMergerUtility();

File file = new File(targetPDFPath);

if (!file.exists()) {

file.delete();

}

mergePdf.addSources(inputStreams);

mergePdf.setDestinationFileName(targetPDFPath);

mergePdf.mergeDocuments();

for (InputStream in : inputStreams) {

if (in != null) {

in.close();

}

}

}

测试用例：

public static void main(String[] args) throws Exception {

List pathList = new ArrayList();

String targetPDFPath = "C:\\pdfFolder\\target.pdf";

pathList.add("C:\\pdfFolder\\A.pdf");

pathList.add("C:\\pdfFolder\\B.pdf");

pathList.add("C:\\pdfFolder\\C.pdf");

pathList.add("C:\\pdfFolder\\D.pdf");

pathList.add("C:\\pdfFolder\\E.pdf");

MergePdf(pathList, targetPDFPath);

}

4.拆分pdf

方法代码：

/**

* 将pdf逐页分割

* @param sourcePdfPath

* @param splitPath

* @param splitFileName

* @throws Exception

*/

public static void SpiltPdf(String sourcePdfPath, String splitPath, String splitFileName) throws Exception {

int j = 1;

String splitPdf = splitPath + File.separator + splitFileName + "_";

// Loading an existing PDF document

File file = new File(sourcePdfPath);

PDDocument document = PDDocument.load(file);

// Instantiating Splitter class

Splitter splitter = new Splitter();

splitter.setStartPage(1);

splitter.setSplitAtPage(1);

splitter.setEndPage(5);

// splitting the pages of a PDF document

List Pages = splitter.split(document);

// Creating an iterator

Iterator iterator = Pages.listIterator();

// Saving each page as an individual document

while(iterator.hasNext()) {

PDDocument pd = iterator.next();

String pdfName = splitPdf + j++ + ".pdf";

pd.save(pdfName);

}

document.close();

}

测试用例：

public static void main(String[] args) throws Exception {

String sourcePdfPath = ("C:\\pdfFolder\\target.pdf");

String splitPath = ("C:\\pdfFolder");

String splitFileName = ("splitPDF");

spiltPdf(sourcePdfPath, splitPath, splitFileName);

}

引用链接：

(17条消息) 使用Apache PDFBox实现拆分、合并PDF_似有风中泣的博客-CSDN博客

(17条消息) Java使用PDFBox操作PDF文件_pdfbox 打印 token_一个傻子程序媛的博客-CSDN博客

(17条消息) PDFbox基本操作_pdtype0font_静若繁花_jingjing的博客-CSDN博客

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