PDFBox 2.0.4：XFA 到文本错误

Question

我在尝试将 PDF(XFA) 转换为字符串时遇到以下错误。当我从 PDFBox 1.8.12 切换到 PDFBox 2.0.4

时，这些错误开始出现

这是日志

Mar 09, 2017 7:16:07 AM org.apache.pdfbox.pdfparser.BaseParser parseCOSArray
WARNING: Corrupt object reference at offset 779916
Mar 09, 2017 7:16:07 AM org.apache.pdfbox.pdfparser.BaseParser parseCOSArray
WARNING: Corrupt object reference at offset 780049
Mar 09, 2017 7:16:07 AM org.apache.pdfbox.pdfparser.BaseParser parseCOSArray
WARNING: Corrupt object reference at offset 780074
java.io.IOException: Unknown dir object c='>' cInt=62 peek='>' peekInt=62 at offset 780074
    at org.apache.pdfbox.pdfparser.BaseParser.parseDirObject(BaseParser.java:951)
    at org.apache.pdfbox.pdfparser.BaseParser.parseCOSArray(BaseParser.java:651)
    at org.apache.pdfbox.pdfparser.BaseParser.parseDirObject(BaseParser.java:866)
    at org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionaryValue(BaseParser.java:150)
    at org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionaryNameValuePair(BaseParser.java:274)
    at org.apache.pdfbox.pdfparser.BaseParser.parseCOSDictionary(BaseParser.java:207)
    at org.apache.pdfbox.pdfparser.BaseParser.parseDirObject(BaseParser.java:854)
    at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:772)
    at org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:741)
    at org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:672)
    at org.apache.pdfbox.pdfparser.COSParser.parseDictObjects(COSParser.java:632)
    at org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:217)
    at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:252)

和

java.io.IOException: Wrong type of referenced length object COSObject{7, 0}: COSDictionary
    at org.apache.pdfbox.pdfparser.COSParser.getLength(COSParser.java:907)
    at org.apache.pdfbox.pdfparser.COSParser.parseCOSStream(COSParser.java:949)
    at org.apache.pdfbox.pdfparser.COSParser.parseFileObject(COSParser.java:780)
    at org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:741)
    at org.apache.pdfbox.pdfparser.COSParser.parseObjectDynamically(COSParser.java:672)
    at org.apache.pdfbox.pdfparser.COSParser.parseDictObjects(COSParser.java:632)
    at org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:217)
    at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:252)
    at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:966)
    at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:922)
    at org.apache.pdfbox.pdmodel.PDDocument.load(PDDocument.java:870)

我阅读了迁移并使用了 load 而不是 loadNonSeq，因为现在 PDFBox 会在内部处理它。

关于如何修复这些错误的任何建议。

编辑 Error#1 Error#2

编辑#2 @TilmanHausherr 我检查了你的理论。我在 Sublime 中打开文件，删除开头的多余空格并保存。我收到以下错误

    org.apache.pdfbox.filter.FlateFilter decode
SEVERE: FlateFilter: stop reading corrupt stream due to a DataFormatException
java.io.IOException: java.util.zip.DataFormatException: invalid distance too far back
    at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:82)
    at org.apache.pdfbox.cos.COSInputStream.create(COSInputStream.java:69)
    at org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:162)
    at org.apache.pdfbox.pdfparser.PDFXrefStreamParser.<init>(PDFXrefStreamParser.java:56)
    at org.apache.pdfbox.pdfparser.COSParser.parseXrefStream(COSParser.java:2075)
    at org.apache.pdfbox.pdfparser.COSParser.parseXrefObjStream(COSParser.java:348)
    at org.apache.pdfbox.pdfparser.COSParser.parseXref(COSParser.java:303)
    at org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:194)
    at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:252)
    at utils.PDFManager.PDFToText(PDFManager.java:280)
    at processing.charge.CertificateUtils.getCertificateTypeFromFile(CertificateUtils.java:56)
    at processing.charge.CertificateUtils.getCertificateType(CertificateUtils.java:48)
    at processing.Controller.getDocumentType(Controller.java:110)
    at processing.Controller.insertIntoDb(Controller.java:43)
    at Test.main(Test.java:203)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.util.zip.DataFormatException: invalid distance too far back
    at java.util.zip.Inflater.inflateBytes(Native Method)
    at java.util.zip.Inflater.inflate(Inflater.java:259)
    at java.util.zip.Inflater.inflate(Inflater.java:280)
    at org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:107)
    at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:64)
    ... 19 more
Mar 09, 2017 11:07:22 PM org.apache.pdfbox.filter.FlateFilter decode
SEVERE: FlateFilter: stop reading corrupt stream due to a DataFormatException
java.io.IOException: java.util.zip.DataFormatException: invalid distance too far back
    at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:82)
    at org.apache.pdfbox.cos.COSInputStream.create(COSInputStream.java:69)
    at org.apache.pdfbox.cos.COSStream.createInputStream(COSStream.java:162)
    at org.apache.pdfbox.pdfparser.PDFXrefStreamParser.<init>(PDFXrefStreamParser.java:56)
    at org.apache.pdfbox.pdfparser.COSParser.parseXrefStream(COSParser.java:2075)
    at org.apache.pdfbox.pdfparser.COSParser.parseXrefObjStream(COSParser.java:348)
    at org.apache.pdfbox.pdfparser.COSParser.parseXref(COSParser.java:303)
    at org.apache.pdfbox.pdfparser.PDFParser.initialParse(PDFParser.java:194)
    at org.apache.pdfbox.pdfparser.PDFParser.parse(PDFParser.java:252)
    at utils.PDFManager.PDFToText(PDFManager.java:280)
    at processing.charge.CertificateUtils.getCertificateTypeFromFile(CertificateUtils.java:56)
    at processing.charge.CertificateUtils.getCertificateType(CertificateUtils.java:49)
    at processing.Controller.getDocumentType(Controller.java:110)
    at processing.Controller.insertIntoDb(Controller.java:43)
    at Test.main(Test.java:203)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMain.main(AppMain.java:147)
Caused by: java.util.zip.DataFormatException: invalid distance too far back
    at java.util.zip.Inflater.inflateBytes(Native Method)
    at java.util.zip.Inflater.inflate(Inflater.java:259)
    at java.util.zip.Inflater.inflate(Inflater.java:280)
    at org.apache.pdfbox.filter.FlateFilter.decompress(FlateFilter.java:107)
    at org.apache.pdfbox.filter.FlateFilter.decode(FlateFilter.java:64)

同样为了验证你的理论，我在 Sublime 中打开了另一个文件（工作正常），它有相同的空格、制表符和 CR。

Working File

Answer 1

如评论中所述，文件在 PDF header 开始之前有空白（CR 和 TAB）。您可以使用 NOTEPAD++（或任何可以编辑二进制文件的编辑器）或（如果您的所有文件都有该缺陷）通过编写打开输入流的短代码删除它们，吞下字节直到您点击“％”然后复制所有其余的从那里到输出流。

我也打开了问题PDFBOX-3714。

更新：这已在 2.0.5 中修复，现已可用。

PDFBox 2.0.4：XFA 到文本错误

PDFBox 2.0.4 : XFA to text error

pdf

xfa

pdfbox