Question

我使用PdfBox for android将数据附加到public byte [] prerparePdfToAppend() { final PDDocument document = new PDDocument(); final PDPage sourcePage = new PDPage(); document.addPage(sourcePage); PDPageContentStream contentStream = new PDPageContentStream(document, sourcePage); contentStream.beginText(); contentStream.setFont(PDType1Font.COURIER, 12); contentStream.showText("Name: " + firstName + " " + lastName); contentStream.newLine(); ... contentStream.endText(); contentStream.close(); output = new ByteArrayOutputStream(); document.save(output); document.close(); byte [] bytesToAppend = new byte[output.size()]; output.write(bytes); output.close(); return bytesToAppend; }文件。

要追加的数据

public void merge (String assetFileName) {
    byte [] toAppendPdf = prerparePdfToAppend();
    PDFMergerUtility mergerUtility = new PDFMergerUtility();
    mergerUtility.addSource(PDFBoxResourceLoader.getStream(assetFileName));
    mergerUtility.addSource(new ByteArrayInputStream(toAppendPdf));
    mergerUtility.setDestinationStream(destStream);
    mergerUtility.mergeDocuments(); //IOException
}

合并代码（简化）

java.io.IOException: Error: End-of-File, expected line
   at org.apache.pdfbox.pdfparser.BaseParser.readLine(BaseParser.java:1419)
   at org.apache.pdfbox.pdfparser.COSParser.parseHeader(COSParser.java:1648)
   at org.apache.pdfbox.pdfparser.COSParser.parsePDFHeader(COSParser.java:1627)
   at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:348)
   at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:888)
   at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:802)
   at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:172)

例外

{{1}}

Answer 1

prerparePdfToAppend方法的最后几行对我来说很奇怪。但为什么让你的生活变得复杂？返回PDDocument：

public PDDocument prerparePdfToAppend()
{
    final PDDocument document = new PDDocument();
    final PDPage sourcePage = new PDPage();
    document.addPage(sourcePage);

    PDPageContentStream contentStream = new PDPageContentStream(document, sourcePage);
    contentStream.beginText();
    contentStream.setFont(PDType1Font.COURIER, 12);
    contentStream.showText("Name: " + firstName + " " + lastName);
    contentStream.newLine();
    ...
    contentStream.endText();
    contentStream.close();

    return document;
}

您的合并代码将如下所示：

public void merge (String assetFileName)
{
    PDFMergerUtility mergerUtility = new PDFMergerUtility();
    PDDocument srcDoc = PDDocument.load(PDFBoxResourceLoader.getStream(assetFileName));
    PDDocument dstDoc = prerparePdfToAppend();
    mergerUtility.appendDocument(dstDoc, srcDoc);
    dstDoc.save(destStream);
    srcDoc.close();
    dstDoc.close();
}

如果这不起作用 - 请确保

PDFBoxResourceLoader.getStream(assetFileName)

真的是真正的PDF流。如果它仍然不起作用，请提及此新代码的哪一行产生异常。当然，请确保您使用的是最新版本的PDFBox。

合并文件给出错误：文件结束，预期行

1 个答案: