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FAQ

How do I convert a PDF to excel in JAVA?
First you have to read the data in PDF with a Framework iText Programmable PDF software .nOnce you are done with reading of data you can write it into the excel using Apache POI - the Java API for Microsoft Documents or JExcelApi . I would suggest you to use Apache POI as it supports 27 workbooks.
How can I extract information from a PDF to MS Excel using FileReader in Java?
This is an example how to extract tables from PDF (to CSV which can be loaded to Excel) using PDFix Library package ; code import ; code import ; code import ; code import ; code import ; code import ; code import .*; code public class ExtractTables code private static int tableIndex = ; code private static void GetText (PdeElement element StringBuilder ss code boolean eof) code PdfElementType elemType = (); code if ( == elemType) code PdeText Elem = (PdeText)element; code String str = (); code (str); code if (eof) code (n); code else code int count = (); code if (count == ) code return; code for (int i = ; i < count; i = i + 1) code PdeElement child = (i); code if (child != null) code GetText(child ss eof); code code code code code private static void SaveTable( code PdeElement element code String savePath code ) throws Exception code PdfElementType elemType = (); code if (elemType == ) code PdeTable table = (PdeTable)element; code StringBuilder ofs = new StringBuilder(); code String path = savePath + + (tableIndex++) + .csv; code int rowCount = (); code int colCount = (); code for (int row = ; row < rowCount; row++) code for (int col = ; col < colCount; col++) code PdeCell cell = (PdeCell)(row col); code if (cell == null) code continue; code int rowSpan = (); code int colSpan = (); code int count = (); code if ((rowSpan != ) && (colSpan != ) && (count )) code (); code for (int i = ; i < count; i++) code PdeElement child = (i); code if (() == ) code GetText(child ofs ); code code if (i < count) code ( ); code code (); code code if (col < colCount) code (n); code code if (row < rowCount) code (n); code code File file = new File(path); code try (BufferedWriter writer = new BufferedWriter(new FileWriter(file))) code (()); code code code else code int count = (); code if (count == ) code return; code for (int i = ; i < count; i++) code PdeElement child = (i); code if (child != null) code SaveTable(child savePath); code code code code public static void run( code String email authorization email code String licenseKey license key code String openPath source PDF document code String savePath directory where to extract tables code String configPath code ) throws Exception code (ExtractTables); code (((pdfix))); code Pdfix pdfix = new Pdfix(); code if (pdfix == null) code throw new Exception(Pdfix initialization fail); code if (!(email licenseKey)) code throw new Exception(()); code PdfDoc doc = (openPath ); code if (doc == null) code throw new Exception(()); code int tableIndex= 1; code int numPages = (); code for (int i = ; i < numPages; i++) code (Processing pages ... + (i + 1) + + numPages); code PdfPage page = (i); code if (page == null) code throw new Exception(()); code PdePageMap pageMap = (); code if (pageMap == null) code throw new Exception(()); code PdeElement element = (); code if (element == null) code throw new Exception(()); code SaveTable(element savePath); code (page); code code ((tableIndex - 1) + tables found); code (); code (); code code code
Is it possible to convert an Excel file to a PDF using Java without any external libraries like POI, etc.?
Very well possible given that likes of POI are written using Java(or can be). Basically xlsx files are zip files. If you change the extension to .zip file. You can view some bunch of xml files. Look at Office Open XML . Office Open XML (also informally known as OOXML or OpenXML ) is a zipped XML -based file format developed by Microsoft for representing spreadsheets charts presentations and word processing documents. The format was initially standardised by Ecma (as ECMA-376) and in later versions by ISO and IEC (as ISO 295). nYou may follow that standard to write your own library in java to extract the data from excel files and follow pdf standard to convert the same into pdf format without using any external libraries. If you mean if there are any inbuilt packages in JDK no. But if you mean if it can be done using Java yes. Because pretty much anything can be written from scratch. But it may not be a good idea to reinvent the wheel.
How do I convert Microsoft Excel AutoShapes into PDF using Java at Server Side without Excel automation or VBA?
for Java API can convert your Microsoft Excel Auto Shapes into PDF on Server Side without any need to install or automate Microsoft Excel. In fact it can be used to convert all sorts of Microsoft Excel files and itsponents to PDF. In order to demonstrate it please see the following Sample Code and the Snapshot given below that shows the Sample Excel file containing various Auto Shapes italic and the Output PDF italic generated by for Java . Java Directory path for input and output files. code String dirPath = DDownload; code code Load sample Excel file into Workbook object. code wb = new Workbook(dirPath + ); code code Specify PDF save options - one page per sheet. code PdfSaveOptions opts = new PdfSaveOptions(); code (); code code Save Microsoft Excel Workbook containing AutoShapes to PDF. code (dirPath + opts); code Screenshot showing Sample Excel file containing AutoShapes and Output PDF file generated by API Hopefully it will be helpful for you. Thank you.
Which is the best source to learn Design patterns in OOPS?
The Head-first series by OReilly was always a good source for me to learn anything that being Head First Design Patterns A Brain-Friendly Ge Eric Freeman Bert Bates Kathy Sierra Elisabeth Robson 5967124 Books s for you I also rmend the one focusing not on design patterns but on oriented analysis and design - that was a real eye-opener to me! Head First -Oriented Analysis and Design Brett D. McLaughlin Gary Pollice Dave West 636928675 Books s And as always - Google is your Friend ;)