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：

    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：

    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：

        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：

        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：

    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

来源地址：https://blog.csdn.net/m0_58859785/article/details/129358045