Guide to download and install Oracle JDK 15 - a commercial build of Java SE Development Kit.
Guide to download and install OpenJDK 15 - an open-source distribution of Java Development Kit.
Code example to check file size before upload in HTML and Javascript/jQuery
How to code upload multiple files functionality in Spring Boot
How to implement file upload function for a Spring Boot application (upload images and display images in browser)
Code examples for PDF export in Spring Boot using OpenPDF library
A guide to implement Excel export functionality for a Spring Boot application, with Apache POI library and MySQL database.
Guide to setup Amazon Corretto JDK as replacement for OpenJDK or Oracle JDK
Spring Security Tips: Retrieve the UserDetails object that represents the currently logged-in user in a Spring Boot application.
Tips to implement a Logout link in a Spring Boot application instead of a button.
Guide to code CSV export function for a Spring Boot web application. The user can download the CSV file.
Guide to configure a Spring Boot project to use Log4j2 logging framework.
Guide to configure Logback for rolling file logging in a Spring Boot application.
A guide to logging in Spring Boot with code examples
Understand error handling Spring Boot, customize error pages and implement custom error controller
Understand what JUnit 5 is, how it differs to JUnit 4 and JUnit 5 code examples for testing CRUD with Hibernate
How to specify run order for test methods in JUnit 5 with code examples
Code examples for unit testing Spring Data JPA repository (testing CRUD operations)
How to map a parent-child relationship with Hibernate and JPA annotations (self-referenced entity mapping)
How to use the hibernate.hbm2ddl.auto property in Hibernate (create, create-drop, update, validate, none)
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