Apache PDFBox 2.0.9 已发布，Apache PDFBox 库是一个开源的用于处理 PDF 文档的 Java 工具。
这是针对 2.0.8 版本的增量修补发行版，包含一些修复和小改进，主要包括：
[PDFBOX-1848] Time Stamp Document Level Sigature
[PDFBOX-2092] Very slow rendering of scanned document
[PDFBOX-3340] Image decoded twice without a real need
[PDFBOX-3984] Add validation data of signer to document
[PDFBOX-3992] Implement show text with positioning operator (TJ)
[PDFBOX-3998] Inform the user when not using KCMS with jdk8 or higher + set KCMS
in cli
[PDFBOX-4020] Into existing signature embedded signed timestamp for validation
[PDFBOX-4022] Cache ColorSpace instances in PDColorSpace.java
[PDFBOX-4024] YCbCr JPEGs not implemented
[PDFBOX-4025] Other page sizes than US Letter should be selectable in TextToPDF
[PDFBOX-4040] Get/set Viewports in PDPage
[PDFBOX-4119] KCMS takes too much time
[PDFBOX-4121] (-Dorg.apache.pdfbox.rendering.UsePureJavaCMYKConversion=true)
takes much time
[PDFBOX-4137] Allow subsampled/downscaled rendering of images, and rendering
subimages
[PDFBOX-4139] Optimize memory footprint of CID mappings within CMaps
[PDFBOX-4142] Don't use md5 checksum due to changes to the release distribuition
policy
[PDFBOX-4150] Optimize clipping text rendering modes
并带来了以下特性：
[PDFBOX-3198] Visible Signature N2 layer / Support signature with text
[PDFBOX-4106] Vertical text creation
[PDFBOX-4117] Implement GoToE action-type
下载地址：
http://pdfbox.apache.org/download.cgi
来自:开源中国社区
