Java PDFBox:拆分PDF并添加书签
在我的项目中,我用书签分割了一个pdf文件。应创建一个新的pdf文件,其中包含拆分的页面和一些新书签 这会导致以下异常:Java PDFBox:拆分PDF并添加书签,java,pdf,pdfbox,Java,Pdf,Pdfbox,在我的项目中,我用书签分割了一个pdf文件。应创建一个新的pdf文件,其中包含拆分的页面和一些新书签 这会导致以下异常: 线程“main”java.io.IOException中的异常:CoStream已关闭,无法读取。可能其随附文档已关闭? 如果我删除行outline.addLast(pagesOutline)新pdf包含拆分的页面(没有例外),但显然不包含书签。我认为我尝试添加书签的方式有问题 我的代码: private void tryCreatePDF(List<String>
线程“main”java.io.IOException中的异常:CoStream已关闭,无法读取。可能其随附文档已关闭? 如果我删除行
outline.addLast(pagesOutline)代码>新pdf包含拆分的页面(没有例外),但显然不包含书签。我认为我尝试添加书签的方式有问题
我的代码:
private void tryCreatePDF(List<String> listOfBookmarks) throws IOException
{
document = PDDocument.load(new File("C:/Users/me/Desktop/existingpdf.pdf"));
PDDocumentCatalog catalog = document.getDocumentCatalog();
PDDocumentOutline bookmarksInExistingFile = catalog.getDocumentOutline();
destinationPDF = new PDDocument();
outline = new PDDocumentOutline();
destinationPDF.getDocumentCatalog().setDocumentOutline(outline);
pagesOutline = new PDOutlineItem();
pagesOutline.setTitle("First Bookmark");
outline.addLast(pagesOutline);
for(String bookmarkToSplit : listOfBookmarks)
{
addPagesFromExistingFileToNewPDF(bookmarksInExistingFile, bookmarkToSplit);
}
createNewPDF();
}
private void addPagesFromExistingFileToNewPDF(PDOutlineNode outlineNodeFromExistingPDF, String bookmarkToSplit) throws IOException
{
PDOutlineItem current = outlineNodeFromExistingPDF.getFirstChild();
while(current != null)
{
PDPage currentPage = current.findDestinationPage(document);
Integer pageNumber = document.getDocumentCatalog().getPages().indexOf(currentPage) + 1;
addPagesFromExistingFileToNewPDF(current, bookmarkToSplit);
String bookmark = current.getTitle().trim();
if(bookmark.matches(bookmarkToSplit + "\\s.+"))
{
Splitter splitter = new Splitter();
splitter.setStartPage(pageNumber);
splitter.setEndPage(pageNumber);
List<PDDocument> pages = splitter.split(document);
addPagesToNewDocument(pages);
}
current = current.getNextSibling();
}
}
private void addPagesToNewDocument(List<PDDocument> pages) throws IOException
{
PDFMergerUtility pdfMergerUtility = new PDFMergerUtility();
for(int index = 0; index < pages.size(); index++)
{
PDDocument doc = pages.get(index);
pdfMergerUtility.appendDocument(destinationPDF, doc);
if(index == 0)
{
addNewBookmarkToNewPDF(doc);
}
doc.close();
}
}
private void addNewBookmarkToNewPDF(PDDocument doc)
{
PDPageFitWidthDestination dest = new PDPageFitWidthDestination();
dest.setPage(doc.getPage(0));
PDOutlineItem bookmark = new PDOutlineItem();
bookmark.setDestination(dest);
bookmark.setTitle("Child Bookmark");
pagesOutline.addLast(bookmark);
}
private void createNewPDF() throws IOException
{
File targetFile = new File("C:/Users/me/Desktop/newpdf.pdf");
pagesOutline.openNode();
outline.openNode();
destinationPDF.save(targetFile);
destinationPDF.close();
document.close();
}
private void tryCreatePDF(图书标记列表)引发IOException
{
document=PDDocument.load(新文件(“C:/Users/me/Desktop/existingpdf.pdf”);
PDDocumentCatalog=document.getDocumentCatalog();
PDDocumentOutline书签ExistingFile=catalog.getDocumentOutline();
destinationPDF=新的PDDocument();
outline=新的PDDocumentOutline();
destinationPDF.getDocumentCatalog().setDocumentOutline(大纲);
pagesOutline=新的PDOutlineItem();
setTitle(“第一个书签”);
outline.addLast(pagesOutline);
for(字符串bookmarkToSplit:listOfBookmarks)
{
将页面从现有文件添加到EWPDF(书签现有文件,书签拆分);
}
createNewPDF();
}
私有void addPagesFromExistingFileToNewPDF(PDOutlineNode outlineNodeFromExistingPDF,String bookmarkToSplit)引发IOException
{
PDOutlineItem current=outlineNodeFromExistingPDF.getFirstChild();
while(当前!=null)
{
PDPage currentPage=当前.findDestinationPage(文档);
整数pageNumber=document.getDocumentCatalog().getPages().indexOf(currentPage)+1;
将现有文件添加到EWPDF(当前,书签到拆分);
String bookmark=current.getTitle().trim();
if(bookmark.matches(bookmarkToSplit+“\\s.+”))
{
拆分器拆分器=新拆分器();
拆分器。设置起始页(页码);
splitter.setEndPage(页码);
列表页=拆分器。拆分(文档);
addPagesToNewDocument(页);
}
current=current.getNextSibling();
}
}
私有void addPagesToNewDocument(列表页)引发IOException
{
PDFMergerUtility PDFMergerUtility=新的PDFMergerUtility();
对于(int index=0;index
堆栈跟踪:
Exception in thread "main" java.io.IOException: COSStream has been closed and cannot be read. Perhaps its enclosing PDDocument has been closed?
at org.apache.pdfbox.cos.COSStream.checkClosed(COSStream.java:77)
at org.apache.pdfbox.cos.COSStream.createRawInputStream(COSStream.java:125)
at org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:1203)
at org.apache.pdfbox.cos.COSStream.accept(COSStream.java:383)
at org.apache.pdfbox.pdfwriter.COSWriter.doWriteObject(COSWriter.java:522)
at org.apache.pdfbox.pdfwriter.COSWriter.doWriteObjects(COSWriter.java:460)
at org.apache.pdfbox.pdfwriter.COSWriter.doWriteBody(COSWriter.java:444)
at org.apache.pdfbox.pdfwriter.COSWriter.visitFromDocument(COSWriter.java:1099)
at org.apache.pdfbox.cos.COSDocument.accept(COSDocument.java:419)
at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1370)
at org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1257)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1267)
at org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1238)
at askstackoverflow.SplitPDFByBookmarks.createNewPDF(SplitPDFByBookmarks.java:126)
at askstackoverflow.SplitPDFByBookmarks.tryCreatePDF(SplitPDFByBookmarks.java:55)
at askstackoverflow.SplitPDFByBookmarks.<init>(SplitPDFByBookmarks.java:33)
at askstackoverflow.Main.main(Main.java:9)
线程“main”java.io.IOException中的异常:CoStream已关闭,无法读取。也许它的附件已经关闭了?
位于org.apache.pdfbox.cos.costream.checkClosed(costream.java:77)
位于org.apache.pdfbox.cos.costream.createRawInputStream(costream.java:125)
位于org.apache.pdfbox.pdfwriter.COSWriter.visitFromStream(COSWriter.java:1203)
位于org.apache.pdfbox.cos.costream.accept(costream.java:383)
位于org.apache.pdfbox.pdfwriter.COSWriter.doWriteObject(COSWriter.java:522)
位于org.apache.pdfbox.pdfwriter.COSWriter.doWriteObjects(COSWriter.java:460)
位于org.apache.pdfbox.pdfwriter.COSWriter.doWriteBody(COSWriter.java:444)
位于org.apache.pdfbox.pdfwriter.COSWriter.visitFromDocument(COSWriter.java:1099)
位于org.apache.pdfbox.cos.COSDocument.accept(COSDocument.java:419)
位于org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1370)
位于org.apache.pdfbox.pdfwriter.COSWriter.write(COSWriter.java:1257)
位于org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1267)
位于org.apache.pdfbox.pdmodel.PDDocument.save(PDDocument.java:1238)
位于askstackoverflow.SplitPDFByBookmarks.createNewPDF(SplitPDFByBookmarks.java:126)
位于askstackoverflow.SplitPDFByBookmarks.tryCreatePDF(SplitPDFByBookmarks.java:55)
在askstackoverflow.SplitPDFByBookmarks。(SplitPDFByBookmarks.java:33)
位于askstackoverflow.Main.Main(Main.java:9)
编辑:
@本问题的以下所有读者:解决问题后,我的程序没有按我预期的那样工作。(每个书签都指向第一页。)但这个问题不属于这个问题。关闭
addPagesToNewDocument()
为时过早。这还会关闭源文档中的资源,因为这两个文档都使用这些资源。最好在保存完所有文档后才开始关闭。我怀疑(只是很快看了一眼)关闭addPagesToNewDocument()
太早了。这还会关闭源文档中的资源。最好在所有的东西都保存好后再关上。@tilmahauser你说得对,它现在起作用了。谢谢如果你把它作为一个答案贴出来,我会接受并投赞成票:)警告加1!