Error: Header doesn't contain versioninfo
Error: Header doesn't contain versioninfo
我正在尝试动态创建一些 pdf 页面并使用 PDFBox PDFMergerUtility 合并它们。基本上我有一组要合并的文档，现在我想在顶部添加一个包含一些动态文本和图像的封面。
PDFMergerUtility ut = new PDFMergerUtility();
// Creating PDF document object
PDDocument document = new PDDocument();
PDPage blankPage = new PDPage();
// Adding the blank page to the document
document.addPage(blankPage);
// Start a new content stream which will "hold" the to be created content
PDPageContentStream contentStream = new PDPageContentStream(document, blankPage);
// Define a text content stream using the selected font, moving the cursor and
// drawing the text "Hello World"
contentStream.beginText();
// Setting the font to the Content stream
contentStream.setFont(PDType1Font.TIMES_ROMAN, 12);
// Setting the position for the line
contentStream.newLineAtOffset(25, 500);
String text = "This is the sample document and we are adding content to it.";
// Adding text in the form of string
contentStream.showText(text);
contentStream.endText();
// Make sure that the content stream is closed:
contentStream.close();
ut.addSource(document.getPage(0).getContents());
// Save the merged pdf to outputstream
ByteArrayOutputStream destStream = new ByteArrayOutputStream();
ut.setDestinationStream(destStream);
ut.mergeDocuments(MemoryUsageSetting.setupTempFileOnly());
但我收到以下错误：
java.io.IOException: Error: Header doesn't contain versioninfo
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:175)
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:154)
at org.apache.pdfbox.Loader.loadPDF(Loader.java:456)
at org.apache.pdfbox.Loader.loadPDF(Loader.java:377)
at org.apache.pdfbox.multipdf.PDFMergerUtility.legacyMergeDocuments(PDFMergerUtility.java:457)
at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:355)
at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:339)
at com.iof.services.AuditDocumentService.mergeAttachments(AuditDocumentService.java:210)
at com.iof.services.AuditDocumentService.downloadAuditDocument(AuditDocumentService.java:118)
at com.iof.services.AuditDocumentService.lambda[=11=](AuditDocumentService.java:95)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at com.iof.services.AuditDocumentService.downloadAuditDocument(AuditDocumentService.java:85)
at com.iof.schedulers.AuditDocumentScheduler.downloadAuditDocument(AuditDocumentScheduler.java:17)
at jdk.internal.reflect.GeneratedMethodAccessor73.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
有人可以帮我解决我做错的事吗？
你会
ut.addSource(document.getPage(0).getContents())
这是错误的，PDFMergerUtility 期望 PDF 文档作为来源，但 PDPage.getContents() 只有 returns 某些页面的内容流。
而是将 document 保存到某些 ByteArrayOutputStream 并将该流的内容作为源添加到 ut。
我正在尝试动态创建一些 pdf 页面并使用 PDFBox PDFMergerUtility 合并它们。基本上我有一组要合并的文档，现在我想在顶部添加一个包含一些动态文本和图像的封面。
PDFMergerUtility ut = new PDFMergerUtility();
// Creating PDF document object
PDDocument document = new PDDocument();
PDPage blankPage = new PDPage();
// Adding the blank page to the document
document.addPage(blankPage);
// Start a new content stream which will "hold" the to be created content
PDPageContentStream contentStream = new PDPageContentStream(document, blankPage);
// Define a text content stream using the selected font, moving the cursor and
// drawing the text "Hello World"
contentStream.beginText();
// Setting the font to the Content stream
contentStream.setFont(PDType1Font.TIMES_ROMAN, 12);
// Setting the position for the line
contentStream.newLineAtOffset(25, 500);
String text = "This is the sample document and we are adding content to it.";
// Adding text in the form of string
contentStream.showText(text);
contentStream.endText();
// Make sure that the content stream is closed:
contentStream.close();
ut.addSource(document.getPage(0).getContents());
// Save the merged pdf to outputstream
ByteArrayOutputStream destStream = new ByteArrayOutputStream();
ut.setDestinationStream(destStream);
ut.mergeDocuments(MemoryUsageSetting.setupTempFileOnly());
但我收到以下错误：
java.io.IOException: Error: Header doesn't contain versioninfo
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:175)
at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:154)
at org.apache.pdfbox.Loader.loadPDF(Loader.java:456)
at org.apache.pdfbox.Loader.loadPDF(Loader.java:377)
at org.apache.pdfbox.multipdf.PDFMergerUtility.legacyMergeDocuments(PDFMergerUtility.java:457)
at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:355)
at org.apache.pdfbox.multipdf.PDFMergerUtility.mergeDocuments(PDFMergerUtility.java:339)
at com.iof.services.AuditDocumentService.mergeAttachments(AuditDocumentService.java:210)
at com.iof.services.AuditDocumentService.downloadAuditDocument(AuditDocumentService.java:118)
at com.iof.services.AuditDocumentService.lambda[=11=](AuditDocumentService.java:95)
at java.base/java.util.ArrayList.forEach(ArrayList.java:1511)
at com.iof.services.AuditDocumentService.downloadAuditDocument(AuditDocumentService.java:85)
at com.iof.schedulers.AuditDocumentScheduler.downloadAuditDocument(AuditDocumentScheduler.java:17)
at jdk.internal.reflect.GeneratedMethodAccessor73.invoke(Unknown Source)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:568)
at org.springframework.scheduling.support.ScheduledMethodRunnable.run(ScheduledMethodRunnable.java:84)
at org.springframework.scheduling.support.DelegatingErrorHandlingRunnable.run(DelegatingErrorHandlingRunnable.java:54)
at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:539)
at java.base/java.util.concurrent.FutureTask.runAndReset(FutureTask.java:305)
at java.base/java.util.concurrent.ScheduledThreadPoolExecutor$ScheduledFutureTask.run(ScheduledThreadPoolExecutor.java:305)
at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
at java.base/java.lang.Thread.run(Thread.java:833)
有人可以帮我解决我做错的事吗？
你会
ut.addSource(document.getPage(0).getContents())
这是错误的，PDFMergerUtility 期望 PDF 文档作为来源，但 PDPage.getContents() 只有 returns 某些页面的内容流。
而是将 document 保存到某些 ByteArrayOutputStream 并将该流的内容作为源添加到 ut。