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Spring is an Application framework which has Inversion of Control container, Aspect-oriented programming framework, Data access, Transaction management, Model-view-controller for web, Remote access framework (RPC) and lot more. It is well integrated with Toplink, Hibernate, JDO, and iBATIS.
Grails is a web framework, for the JVM, built on top of Spring Boot. It leverages many features such as Spring-Powered dependency injection. It seamlessly and transparently integrates and interoperates with Java, the JVM, and existing Java EE containers.
Light 4j is a fast, lightweight and cloud native microservices framework. Light means lightweight, lighting fast and shed light on how to program with modern Java SE. It is 44 times faster than the most popular microservices platform Spring Boot embedded Tomcat and use only 1/5 of memory.
Spark is a micro framework for creating web applications in Kotlin and Java 8 with minimal effort. It is a simple and expressive Java/Kotlin web framework DSL built for rapid development. Sparks intention is to provide an alternative for Kotlin/Java developers that want to develop their web applications as expressive as possible and with minimal boilerplate. With a clear philosophy Spark is designed not only to make you more productive, but also to make your code better under the influence of Spark’s sleek, declarative and expressive syntax.
SpeakRight is an Java framework for writing speech recognition applications in VoiceXML. Dynamic generation of VoiceXML is done using the popular StringTemplate templating framework. Although VoiceXML uses a similar web architecture as HTML, the needs of a speech app are very different. SpeakRight lives in application code layer, typically in a servlet. The SpeakRight runtime dynamically generates VoiceXML pages, one per HTTP request.
Struts is a Web Framework which uses Model-View-Controller (MVC) architecture. The Model represents the business or database code, the View represents the page design code, and the Controller represents the navigational code.
Struts works well with conventional REST applications, SOAP and AJAX.
MyFaces is a family of projects related to the JavaServer Faces (JSF) specification published as part of the Java Community Process. The "core" project is an implementation of that specification. Other MyFaces projects implement related specifications (eg the Portlet Bridge), or add features to any JSF implementation (not just the Myfaces Core).
ParSeq is a framework that makes it easier to write asynchronous code in Java. It supports Parallelization of asynchronous operations (such as IO), Serialized execution for non-blocking computation, Execution tracing and visualization, Tasks with retry policy, Code reuse via task composition and lot more.
JHipster is a Yeoman generator, used to create a Spring Boot + Angular project. Its goal is to generate for you a complete and modern Web app. It provides a high-performance and robust Java stack on the server side with Spring Boot, A sleek, modern, mobile-first front-end with Angular and Bootstrap and a powerful workflow to build your application with Yeoman, Webpack/Gulp and Maven/Gradle.
Ratpack is a set of Java libraries for building modern HTTP applications. It provides just enough for writing practical, high performance, apps. It is built on Java 8, Netty and reactive principles. It is similar to NodeJS, helps to implement non blocking HTTP apps in Java.
Javalin is a very lightweight web framework for Kotlin and Java, inspired by Sparkjava and koa.js. Javalin is written in Kotlin with a few functional interfaces written in Java. This was necessary to provide an enjoyable and near identical experience for both Kotlin and Java developers.
Restlet Framework is the leading RESTful Web API framework for Java. It has powerful routing and filtering capabilities, unified client and server Java API, developers can build secure and scalable RESTful web APIs. It is available in editions for all major platforms (Java SE/EE, Google App Engine, OSGi, GWT, Android) and offers numerous extensions to fit the needs of all developers.
An opinionated scaffolding library that jump-starts Java projects with an API-first design, secure defaults, and minimal dependencies. Alpine provides the basis for quickly developing a 'Thin Server Architecture'. This type of architecture shifts the role of webapps to being API providers with little or no responsibility for server-side HTML rendering. This type of architecture is perfect for client-side rendered webapps that rely heavily on JSON, for Single Page Applications (SPA), and to power back-ends that drive mobile applications.
RESTX is the lightweight, modular, feature rich, blazing fast, open source Java REST framework. It shares similarities with modern frameworks like Play! like hot compile and a very productive experience, but focused on REST and pure Java.
The BeAPI Framework is a full featured api automation framework providing a FULL API automation with an AVERAGE response time per call of 0.27 milliseconds per request (Google requires their calls to be UNDER 200 ms). Its feature include Automated Batching, CORS, JWT Authentication, Throttling & Rate/Data Limits, Localized API Cache, Reporting.
Sometimes you want to create dynamic URL where some parts of the URL's are not static. With the : operator you can create variables in the URL which will be saved later in a HashMap. You can also add an event listener when the user called an route which contains an certain parameter.