Apache PDFBox 1.8.11 發布，此版本是個增量 bug 修復版本，包括大量 bug 修復和改進。

現已提供下載：

主要改進內容：

Bug 修復

[PDFBOX-962] - All sort of Problems when importing Xfdf files into PDFs ->

damaged pdfs and NPEs

[PDFBOX-2508] - Text extraction getting zero font height, bad widths, and ? for

text in this PDF with Type 3 Fonts

[PDFBOX-2693] - OutOfMemoryError at

org.apache.fontbox.cff.IndexData.initData(IndexData.java:95)

[PDFBOX-2816] - PDFBox makes disallowed changes when signing a signed document

[PDFBOX-2845] - Error parsing PDF

[PDFBOX-2901] - High CPU load and OutOfMemoryError when rendering shading

[PDFBOX-2903] - ClassCastException at PDFParser:667

[PDFBOX-2909] - NullPointerException when rendering shading with no function

[PDFBOX-2911] - Merge does not close input streams

[PDFBOX-2914] - java.lang.NegativeArraySizeException in

org.apache.pdfbox.pdmodel.graphics.color.PDDeviceGray.createColorModel

[PDFBOX-2916] - ArrayIndexOutOfBoundsException in CmapSubtable.processSubtype6

[PDFBOX-2923] - CFFParser parser treats CIDFont's charset data as SID

[PDFBOX-2924] - ClassCastException when doing PDFSplit

[PDFBOX-2925] - EmptyStackException in PDFStreamEngine.getColorSpaces

[PDFBOX-2935] - Problem while extracting font from PDFontSetting (used in

PDExtendedGraphicsState)

[PDFBOX-2940] - ClassCastException in FDF export

[PDFBOX-2958] - TIFF-Predictor with 1 bit per component not supported

[PDFBOX-2964] - Checkbox getOnValue() throws NPE

[PDFBOX-2965] - NPE in PDAcroForm.getField() if the /Fields entry is missing

[PDFBOX-2976] - java.util.zip.DataFormatException: incorrect data check

[PDFBOX-2982] - fix ClassCastExceptions in operator methods

[PDFBOX-2985] - Potential NPE in PDMarkedContent#getMCID()

[PDFBOX-2986] - Potential resource leak in TTFParser's use of RAFDataStream

[PDFBOX-2987] - NPE in PDTrueTypeFont.extractCMaps

[PDFBOX-2988] - Infinite recursion in ExtractImages 1.8.11-SNAPSHOT

[PDFBOX-2989] - LZW decode filter shouldn't throw IndexOutOfBoundsException

[PDFBOX-2990] - PDDocument.load fails to load a PDF document.

[PDFBOX-2996] - StackOverflow in Quicksort

[PDFBOX-3002] - PDF files not closed after load fails

[PDFBOX-3022] - Maven repos should be https

[PDFBOX-3034] - Newly created XRef stream has direct root objects

[PDFBOX-3035] - Files with missing xref table must fail

[PDFBOX-3041] - Wrong default type in Xref stream W0 element

[PDFBOX-3087] - Metadata stream should not be compressed

[PDFBOX-3097] - ClassCastException in Axial / Radial shading when object

reference in extends

[PDFBOX-3110] - Extract by beads doesn't work

[PDFBOX-3114] - Visible signatures in different pages changes previous revision

[PDFBOX-3153] - Direct JPEG extraction results in invalid images in 2.0.0 releases.

[PDFBOX-3155] - org.apache.pdfbox.util.PDFTextStripper class initialization

throws NumberFormatException with recent Verona-enabled Java 9 JVMs

[PDFBOX-3157] - PDOutputIntent has N=3 (RGB) hardcoded

[PDFBOX-3173] - Signature dictionary is not decrypted in encrypted files

[PDFBOX-3190] - Links don't work in firefox

[PDFBOX-3193] - New NPE in PDFBox 1.8.11-rc1 in Acroform PDCheckbox's isChecked()

改進

[PDFBOX-1621] - Add setModifiedDate(Calendar c) to PDAnnotation

[PDFBOX-2891] - Use animal sniffer maven plugin to detect non java 5 api usage

within the 1.8 branch

[PDFBOX-2952] - Log statement on level 'severe' while nothing else indicates error

[PDFBOX-2962] - Handle TIFF predictor for bpc 2 and 4 / optimize existing

predictor code

[PDFBOX-3007] - Preflight cookbook example is inefficient

[PDFBOX-3176] - Add a removeRegion method in PDFTextSTripperByArea class

PDFBox是Java實現的PDF文檔協作類庫，提供PDF文檔的創建、處理以及文檔內容提取功能，也包含了一些命令行實用工具。

主要特性包括：

從PDF提取文本

合并PDF文檔

PDF 文檔加密與解密

與Lucene搜索引擎的集成

填充PDF/XFDF表單數據

從文本文件創建PDF文檔

從PDF頁面創 建圖片

打印PDF文檔

總結

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