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 更多详情可查阅发行说明。 下载地址： http://pdfbox.apache.org/download.cgi Apache PDFBox 2.0.9 发布，Java 的 PDF 处理类库下载地址
