Poi apache jar download
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And setting up a POJO class to hold metadata for each field of the above class. Defining the Java POJO class which will be used to write into the Excel sheet.Defining the Java Annotation interfaces which will be used for the dynamic class reflection.Creating an API endpoint to send an HTTP request to download the Excel file.Setting up a Spring Boot project with Apache POI dependencies and other necessary dependencies.These main steps will be followed for the implementation : The figure below shows the Apache POI related interfaces and classes for manipulating xlsx Excel files.įurthermore it provides excellent support for additional excel features such as working with Formulas, creating cell styles by filling colors and borders, fonts, headers and footers, data validations, images, hyperlinks etc. The XSSF library contains the classes for handling the xlsx Excel format. XSSF (XML Spreadsheet Format) − It is used for xlsx file format of MS-Excel (2007 and later) files.Įach of the Apache POI libraries are dedicated to manipulate each particular type of file.
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HSSF (Horrible Spreadsheet Format) − It is used for xlsx file format of MS-Excel (97–2007) files. Since we are focusing on writing Excel files, we will be using the following file formats of Apache POI for spreadsheets. The objective of Apache POI is to design a cross-platform API that can manipulate various file formats of Microsoft Office and Open Office Documents. The need for custom code for writing each type of fields and row-column processing has been reduced, you are good to go with minimum customization.Īpache POI (Poor Obfuscation Implementation) is a popular open source library run by the Apache Software Foundation which is developed for reading and writing files in Microsoft Office formats, such as Word, PowerPoint, and Excel. In this article, a way to generalize the writing to an Excel file for any type of Objects with both single and composite(array) types of fields has been achieved using Apache POI with the support of Java Reflection feature. Working with Excel documents is a frequently used feature in a software application.
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