Alexis Kestler
Dear reader, as an experienced Java developer and architect, I want to provide you with a comprehensive overview of the top Java EE frameworks used for building robust enterprise applications. This guide will empower you to make informed decisions when selecting Java frameworks based on your specific needs and constraints.
Java EE (Enterprise Edition) has evolved into a versatile platform, giving developers the tools to build complex, large-scale enterprise applications. With its immense popularity, proven robustness and continuous evolution, Java has become one of the most widely adopted programming languages for enterprise software development.
In fact, recent StackOverflow developer surveys reveal that Java has consistently ranked as the #1 or #2 most popular language among professional developers:
| Year | Java Popularity Ranking |
|---|---|
| 2022 | #2 |
| 2021 | #2 |
| 2020 | #1 |
| 2019 | #1 |
With over 9 million developers worldwide, Java dominates the enterprise development landscape.
In recent years, new language features and updates have expanded Java‘s capabilities for building enterprise-level web and mobile applications. The tried-and-tested Java Virtual Machine remains a reliable, trusted platform that supports Java‘s "write once, run anywhere" (WORA) approach.
While Java is clearly not the only option for web application development today, its maturity and ubiquity in enterprise make it a safe choice for many organizations.
The Java EE ecosystem offers numerous high-quality frameworks that allow developers to create sophisticated, production-ready web and enterprise applications on the robust Java platform.
As an experienced Java professional, I want to explore the most popular Java EE-based frameworks that enable enterprise application development:
Spring Framework
The Spring Framework, created by Pivotal, has emerged as the most dominant and widely adopted Java framework. Spring implements the inversion of control (IoC) and dependency injection patterns for Java.
Over the years, Spring has incorporated a wealth of advanced features, utilities and resources that developers leverage to build virtually any type of Java application – from small microservices to massive enterprise systems. It runs seamlessly on the trusted Java Virtual Machine and integrates smoothly with other JVM languages like Groovy, Scala and Kotlin.
Out of the box, Spring provides capabilities to handle common but complex tasks like transaction management, data access, messaging, web services and security. With Spring, developers can focus their efforts on the business logic instead of boilerplate code. While Spring‘s configuration can seem daunting at first, especially compared to simpler frameworks, it offers an unparalleled feature set for enterprise Java development.
Let‘s look at some key highlights of the Spring Framework:
- Easy testability and backward compatibility – Spring emphasizes testability and enables evolving applications without breaking changes
- Supports a vast ecosystem of classes and packages – Provides a comprehensive infrastructure with over 20 modules
- Powerful ecosystem and community – Has great documentation and learning resources fueled by its widespread adoption
- Enables flexible code – Embraces POJOs (Plain Old Java Objects) for cleaner code
- Declarative programming model – Annotate Java code for concise, elegant configuration
- Integrates with Java EE – Interoperates seamlessly with JPA, JMS, JTA and other standards
The extensive adoption of Spring makes it easy to find expertise, libraries and learning resources. For beginners looking to master Spring, I highly recommend this fantastic Spring course on Udemy which provides a comprehensive introduction.
Hibernate ORM
Hibernate ORM has become the most widely used Java framework for Object-Relational Mapping. It is commonly used to map Java domain model classes to relational database tables.
Hibernate offers its own easy-to-learn database query language called HQL. I‘ve found Hibernate‘s criteria API to be very useful for creating type-safe queries in Java code.
This framework dramatically simplifies integration between SQL databases and Java applications. Although Hibernate is open source software under the permissive GNU LGPL v2.1 license, it can be used freely even in commercial applications.
Let‘s explore some of the major advantages of using Hibernate:
- Provides a robust, secure application base – Handles SQL injection concerns automatically
- Database-agnostic code – HQL and Criteria APIs abstract database differences
- Built-in collections and caching – Enables high performance data access and caching
- Portability – Makes it easy to port data across multiple SQL databases
- Matures data access – Allows starting with simpler data access patterns and evolving towards advanced modeling techniques
Given its versatility and maturity, Hibernate remains a tried-and-tested solution for enterprise Java applications needing to integrate with SQL databases.
Apache Struts
Apache Struts is a mature, open source MVC framework for crafting elegant Java web applications. It implements the Model-View-Controller (MVC) pattern and related best practices for interactive web application development using Java Servlets and JSPs.
Struts is developed and maintained by the Apache Software Foundation – it has a pluggable architecture, built-in security capabilities, and rich tag libraries for productive web development.
Developers can easily extend Struts by creating custom JAR files and adding them to the application‘s classpath. There are over 50+ plugins available to integrate Struts with other frameworks like JSF, JUnit, Spring and more.
Let‘s look at some of Struts‘ key strengths:
- Integrates seamlessly with SOAP, AJAX, REST and GraphQL – Excellent for API-driven web applications
- Combines elegantly with other frameworks via plugins – Choose your preferred mix of technologies
- Enables building maintainable web apps using simple POJO actions and MVC
- Supports different view technologies and themes – Use JSPs, Freemarker, Velocity or others
- Provides a robust, well-tested platform – Over 15 years of stable releases and fixes
For Java beginners looking to learn Struts 2.x, I recommend this excellent Struts 2 course on Udemy which covers all key concepts.
Google Web Toolkit (GWT)
GWT, or Google Web Toolkit, is a popular open source Java web framework used to build browser-based applications using Java. It compiles Java code into optimized JavaScript.
Many Google web applications like AdSense, AdWords, Wallet, and Blogger use GWT extensively on the server-side. GWT allows Google developers to reuse their Java expertise to create rich client-side experiences.
This framework enables developers to build and test AJAX applications entirely in Java, while handling cross-browser differences under the hood. GWT provides Java developers an escape from JavaScript‘s pitfalls.
GWT includes in-depth support for internationalization, accessibility, and allowing switching between prod and debug mode instantly. It is an excellent choice for large, complex browser-based apps like banking and trading platforms.
Play Framework
The Play Framework is an innovative reactive web framework optimized for developer productivity, scalability and Java/Scala applications.
Play leverages the Akka toolkit internally and runs seamlessly on the Java Virtual Machine (JVM). It incorporates the right tools and features for building clean, testable user interfaces, making Play web applications fast to develop and iterate on. Play boosts developer productivity significantly compared to traditional Java EE development.
Following principles of the Reactive Manifesto, Play enables building loosely coupled, scalable systems. Let‘s discuss some noteworthy features of Play:
- Extremely high developer productivity – Rapid development with ~4x less code than Java EE
- Secure by default – Includes CSRF protection, HTTP headers security
- Powered by Akka – Leverages Akka‘s powerful concurrency model under the hood
- Completely stateless – No Java EE sessions to deal with
- Unit testing built-in – Comes with unit testing, mockito, Selenium and JUnit
- Live code reloading – View changes instantly without redeploying
With its reactive architecture, Play is ideal for building cloud-native, scale-ready Java applications.
Grails Framework
Grails is an open source Groovy-based framework that enables developers to rapidly build web applications using the dynamic Groovy language.
One of Grails‘ main goals is improving developer productivity by enabling object-oriented concepts like closures and dynamic typing. Under the hood, Grails incorporates time-saving features from Spring Boot to reduce boilerplate code.
Learning Groovy syntax is relatively straightforward for Java developers. Grails simplifies integrating Java libraries and components. Its supportive community has created over 900 plugins offering extended functionality.
Grails‘ convention-over-configuration approach cuts down repetitive code substantially. Its high-productivity development makes Grails ideal for Agile teams delivering web applications fast.
Vert.x Toolkit
The Vert.x toolkit is a lightweight, polyglot framework for the JVM with extensive capabilities. While Vert.x works great for Java, you can also use JavaScript, Groovy, Ruby, Scala, Kotlin and more.
Importantly, Vert.x is a non-opinionated library, not a restrictive application container. This gives you more control over your architecture.
Let‘s examine some of Vert.x‘s key traits:
- Event-driven and non-blocking – Excellent for reactive architectures
- Simplifies concurrency & scalability – Efficient async code with Vert.x threads
- Polyglot – Write Vert.x apps in Java, JS, Groovy and more
- Microservices ready – Lightweight and embeddable
Vert.x enables writing reactive microservices and web apps that scale effortlessly. Its small core makes the framework ideal for container deployment.
Apache Wicket
Apache Wicket is a lightweight Java web framework for building stateful web applications. It features excellent component-based UI capabilities and POJO data modeling.
Wicket is open source and integrates seamlessly with HTML, resulting in simple, readable pages that reduce coding complexity. Wicket uses plain HTML for templates without a proprietary template language.
It provides true bi-directional stateful communication between the browser and server. Wicket components integrate with Spring and Hibernate and can be tested easily via mocks.
Let‘s discuss some of Wicket‘s advantages:
- Native Java and HTML support – Use your favorite language and markup
- Organizes code intuitively – Components encapsulate behavior
- Debug and test components – Even mock REST API layers and the database
- Stateful communication – No hidden fields or session tracking needed
- Reuses code – Create widgets once and use everywhere
- SEO-friendly – Results in clean HTML
For building interactive intranet applications, Wicket‘s component model accelerates development substantially.
JavaServer Faces (JSF)
JavaServer Faces (JSF) is a mature Java EE standard for building web UIs through a component-based model. It utilizes common web-tier concepts without limiting developers to a specific markup language, protocol or client.
JSF was developed via the Java Community Process under JSR-314. The key concept behind JSF is cleanly separating UI component classes from their presentation layer. This enables reusing components across various clients.
JSF 2.x provides an extensive library of HTML/Ajax components, rich lifecycle handling, conversion/validation support, and integrates with CDI, EJB and more. While JSF has its detractors, it remains a proven technology for Java EE teams looking for a declarative web framework and ajax capabilities.
Making the Right Choice
I hope this guide has given you a helpful overview of the most popular Java frameworks used by enterprise development teams today. Java remains among the top platforms in our industry, thanks to its versatility, scalability, community and ecosystem.
For newcomers unfamiliar with Java web frameworks, my advice would be to start small and opt for an easy-to-learn framework like Spring or Play. Learn it well through building some personal projects, then consider exploring other frameworks.
Veteran Java teams should think carefully about their unique needs, capabilities and constraints before adopting any new enterprise framework. Extensive frameworks like Spring bring a learning curve but can improve consistency and accelerate development of complex systems.
I welcome your thoughts and experiences with these Java EE frameworks. Feel free to reach out if you have any other questions!
