PDF operation base on Java -refer to related sites

Library / packageLicenseDescriptionAdobe Acrobat Reader for JavaFreewareRead and display PDF documents. A viewer application and a JavaBean are available. Works with Java 1.1.8+.Big Faceless PDF libraryCommercialWrite PDF documents, with support for various advanced features.ceTe SoftwareCommercialDynamicPDF Generator to write, DynamicPDF Merger to read and write PDF files.Etymon PJGPL / CommercialRead and write PDF documents. There are two versions, classic and professional. Classic comes under the GPL and requires Java 1.1. Professional is commercial and requires Java 1.4.FOPApache LicenseWrite PDF documents, render them from XML/XSL sources.gnujpdfGPLWrite PDF documents. An extension of the retepPDF project.iTextLGPLWrite PDF documents. Requires Java 1.2.PDFGoCommercialRead PDF documents. Viewer (standalone application) and Java Bean available.jPDFPrintCommercial (trial version available)Library to read and print PDF documents.jPDFProcessCommercial (trial version available)Library to read, manipulate and save PDF documents. Manipulation operations include splitting, drawing, printing, encrypting and exporting as images.jPDFViewerCommercial (trial version available)Java Bean to display PDF documents.jPDFWriterCommercial (trial version available)Pure Java library to write PDF files. Library can be used like a Java printer job. Thus, existing Java code for printing can be reused to create PDF files.JPedalGPL or site license or fixed feeRead PDF documents. This library can both extract content from PDFs and rasterize them.jPDFCommercial (trial version available on request)Manipulation of PDF files, especially suited for the server side. Features include PDF generation from templates, splitting, merging, parsing and encryption. Written in pure Java (requires Java 1.3 or higher).JustFormsPDFCommercial (trial version available)Pure Java library for filling and editing PDF documents with forms. Requires Java 1.2+.MultivalentSpecial licenseReads PDF and other document formats. Includes a browser to view all supported files. Provides various tools to manipulate PDF files: compress, uncompress, split, merge, encrypt, decrypt, info, validate, extract text, and full-text search (withLucene). Source code available.PDF stream writerFreewareJava library to convert XML to PDF files.PDFBoxBSDLibrary to access PDF files. A utility to convert to text is included.PDFlibCommercialRead and write PDF documents. This is a C library which has Java JNI bindings.PDFTextStreamCommercialRead PDF documents. This library can extract text and metadata from PDF files. It supports PDF up to version 1.5 and comes with support forLucene.retepPDFGPLWrite PDF documents.Saffron Document ServerCommercialReads PostScript (.ps) documents and generates PDF, HTML, RTF, TIFF, and other formats. Configured as a server for concurrent document rendering.SmartJPrintGPL-likePure Java library to write PDF files. Generates PDF files from Swing GUI components, provides preview functionality.SnowboundCommercialRead and write PDF files.XMLMillCommercial, trial version availableCreate PDF documents from XML/XSL.