In this article we are going to learn how to obtain the client’s browser IP address when a user visits our Spring Boot web application. The example Java source code also shows how to get the client IP address even when the application deployed behind the proxy server. We also get the IP address of the local network if the client visits the Spring Boot website via local network.
In this post we will show you how to transfer files from a local host to a remote server and download files from a remote server to local host via SFTP in Spring Boot applications. In order to transfer files via SFTP in Java applications we also explore the JSch library.
In this tutorial we’re going to learn how to implement file uploading function in a Spring Boot web application.
As a daily job of a web developer you usually have the scenario that you need to generate the thumbnail image from a large original image. This take can easily be done by the Thumbnailator library, an easy to use thumbnail generation library for Java. In this Java tutorial we are going to learn how to use the Thumbnailator library.
In this tutorial we’re going to learn how to use open source Java libraries to quickly write and read Comma Separated Values or CSV file format. We will explore 3 useful libraries and implement Java programs to write and read CSV files using each library.
In Excel there is an option to hide / Unhide a row by select the row then righ click on it and choose Hide / Unhide option. In this tutorial we will learn how to use Apache POI library in Java to create an Excel file and hide its row. Then we try to unhide it by another Java application example.
In this tutorial we will learn how to create an Excel cell with multiple font styles using Apache POI library. We will implement different examples to create .xls and xlsx Excel file format using HSSFRichTextString and XSSFRichTextString class in Apache POI.
In PDF document format the page label to identify each document page visually for example showing text label on thumbnail panel on PDF reader application. In this Java tutorial we will learn how to create page labels for PDF document by Java application using Apache PDFBox library.
In this tutorial we will learn how to add bookmark items to a PDF document in Java using Apache PDFBox library. The post also show how to add bookmarks for new PDF document and existing PDF file.
This toturial will show you how to adding metadata information such as title, creation date, modification date, author, creator tool, producer keywords etc. and custom properties to a new PDF document or the existing PDF file in Java using Apache PDFBox library.