Which APIs in java help in extracting table metadata from a pdf, and presenting that table in a web page?
The result should be that when the source of page is viewed it will show the html code of that table.
Itext is usefull in this context
http://itextpdf.com/
I assume that, you need a PDF library for Java.
PDFBox is one of the popular libraries created to PDF manipulation and I think it is worth to look at it.
try The Metadata Extract Tool which extracts metadata from specific file types including PDF. Then you can parse the xml output with any Java XML parser. Once you're able to parse it, elements can be easily laid down in your view page.
Related
I have a PDF file that was produced with iText and created with JasperReports (I don't know if it's relevant) and I was wondering if I can find some API or anything to see the structure because I need to extract text from it.
I tried with iText, PDFBox and other Java libraries but I only get text line by line and that's not what I need.
I also tried conversion in HTML, XML, DOM but I get the same result with text extraction, no structure parsed.
If I try to open it as DOCX I see that Word recognize sort of structure, for example an area that looks like a table in PDF, after conversion in DOCX it is actually a table.
I need to understand how the PDF was created, if this is possible. I know that working with PDF's is not easy, but I need to start with something useful. Thanks!
PDFTron PDFGenie can do full semantic table and paragraph extraction from a PDF file. It can generate a reflowable HTML file containing all the appropriate HTML tags for tables and paragraphs.
See this blog for more details.
https://www.pdftron.com/blog/parsing-extraction/table-extraction-and-pdf-to-xml-with-pdfgenie/#a-idpart7aevaluating-accuracy-of-pdf-table-recognition
You can download Windows/macOS/Linux PDFGenie command line tool here.
https://www.pdftron.com/downloads/linux
One more option, we can extract from Aspose PDF also, if you want look into the below link
https://blog.aspose.com/2018/02/28/extract-text-by-paragraphs-and-convert-files-to-pdf-with-aspose.pdf/
I have hundreds of rich PDFs that need to be generated from my application, they have images and colorful content. I was looking to build a framework which support a template and data model and can take care of rest, so adding anew pdfs would be just adding a new template. In the past i have used free-marker to generate HTML and that print HTML to PDFs, are there any better recent solution to solve this problem?
There are various things you could do:
generate xml data, apply xslt transformation to style it, and convert
the html document to a pdf
code a small class that converts whatever data format you have to a pdf document (you would need to do all the layout through code)
create a template (using whatever design program you want) pdf document, insert form fields, and have iText fill the form (several of our customers go for this approach)
Keep in mind that JasperReports uses a proprietary format. Whereas the approaches I suggested use only open and well-established formats.
Take a look at JasperReports.
I am developing a standalone application in Java. I want to generate a pdf file using Java code. I have a display form in which all the details are fetched from database and displayed in the window. Details are Customer Name, Order Details etc.
Now I want to have a button there which says Convert to pdf.
I want to convert this to pdf file with proper alignment and formatting like tables, font etc.
What can be an ideal way to go about it?
I'd suggest you to use reporting tool like a jasperreports.
JasperReports is entirely written in
Java and it is able to use data coming
from any kind of data source and
produce pixel-perfect documents that
can be viewed, printed or exported in
a variety of document formats
including HTML, PDF, Excel, OpenOffice
and Word.
Have a look at other open source projects (pdf api):
Apache PDFBox
Apache Tika (Toolkit for detecting and extracting metadata and structured text content from various documents using POI and PDFBOX parser libs.)
PDFjet
Use iText:
http://itextpdf.com/
I have a huge pdf file (20 mb/800 pages) which contains some information.
It has got index with hyperlinks. Also most of the remaining information is in Tabular format (in pdf). I need to retrieve this information using Java and store it in SQL Server.
Which is the best API available to read this kind of file from Java?
It is unlikely to be in tabular format inside the PDF as PDF does not contain structure information unless explicitly added at creation time. I wrote an article explaining some of the issues with text extraction from at PDF at http://www.jpedal.org/PDFblog/2009/04/pdf-text/
Have you tried iText:
iText
Download iText
iText in Action — 2nd Edition
List of the Examples
I was looking at using iText to create both a pdf and html version of a document with RTF as a possible option. According to this question this is no longer possible with iText. Is there a library that will allow me to create a document in Java and output it as both PDF and HTML? The ability to output RTF would be nice but is not required.
As that answer to the other question states, you can just use the iText RTF Library.
I have used PD4ML to convert HTML to pdf. Even though it is a commercial app. It is very reliable and supports CSS well.
JasperReports. If you look at this package it supports export to:
pdf
html
rtf
xls
xml
You have two options to create the documents:
via iReport - a visual designer for reports
via an API, where you construct everything with Java code.
Note that even though JasperReports's main function is to create reports, it can very well create other documents, with no tabular data for example.
You could also try Docmosis since that supports the output formats provided by OpenOffice (including the ones you specified) and you can often do the job with a lot less code.