Awesome GitHub RepositoriesJava

Play is a full-stack reactive web framework for Java and Scala. It provides a comprehensive development platform for building scalable web applications and RESTful APIs using a stateless and non-blocking architecture designed for high concurrency. The framework emphasizes high-velocity development through dynamic code reloading, which allows developers to update applications and verify changes without performing a full restart. Its capability surface covers the construction of JSON-based web endpoints, server-side logic for the JVM, and the implementation of scalable web architectures.

Spark is a lightweight Java web framework and embedded server designed for building web applications with minimal boilerplate. It functions as an HTTP routing engine that maps URL paths and methods to handler functions, providing a specialized domain specific language for web development in Kotlin. The framework enables the implementation of REST APIs and web services through the definition of HTTP routes. It supports the extraction of dynamic path parameters and the transformation of response data into formats such as JSON. Additional capabilities include the ability to serve static files a

Spring PetClinic is a reference application for the Spring Framework, serving as a complete implementation that demonstrates the architecture and best practices for building Java services. It functions as a veterinary practice management system designed to track pet owners, animal records, and clinical visit histories. The project provides a practical example of a containerized web application, illustrating how to integrate a Java application with relational databases like MySQL and PostgreSQL. It serves as a guide for learning how to develop an application using the model-view-controller pat

Dropwizard is a Java web application stack and REST framework used to build production-ready web services. It integrates an embedded HTTP server with operational tools to provide a complete environment for developing network interfaces that exchange JSON data. The project provides a set of core technology stacks for relational data mapping, schema migration, and operational performance monitoring. It includes a relational database migration tool to track schema updates and execute versioned scripts before an application starts. The framework covers a broad capability surface including reques

Javalin is a lightweight web framework for Java and Kotlin designed for building REST APIs and web applications. It functions as an embedded Jetty web server, allowing applications to run as standalone processes without the need for an external servlet container. The project provides specialized frameworks for diverse communication patterns, including a REST API framework with automatic OpenAPI schema generation, a GraphQL API framework with query and mutation resolvers, and a WebSocket server for bidirectional real-time communication. It also includes a dedicated framework for pushing real-t

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NGINX Unit is an open-source application server designed to natively execute code across multiple programming language runtimes and WebAssembly within a single process. It serves as a multi-language application server that can run applications written in Go, Java, Node.js, Perl, PHP, Python, Ruby, and WebAssembly side by side, without requiring separate runtime environments for each language. The server distinguishes itself through a RESTful JSON control API that enables dynamic, zero-downtime configuration changes without restarting the server. It combines event-driven asynchronous I/O with

This project is a Java web application and Spring Boot bookmark manager designed for saving, categorizing, and organizing website bookmarks and articles. It functions as both a self-hosted resource library for private archives and a social bookmarking platform for community-driven link sharing. The system enables social knowledge sharing through the discovery of public collections and social content interaction, allowing users to like, share, and discuss saved resources. It also provides tools for personal bookmark management, including the ability to organize links into categorized folders.

Dieses Projekt ist eine Sammlung von Referenzimplementierungen und Demonstrationsprojekten für Computer Vision, DevOps-Automatisierung, verteilte Systeme und Java-basierte Microservices. Es bietet eine Programmbibliothek als Referenz sowie praktische Beispiele für die Entwicklung von Server-Side-Anwendungen, die Containerisierung von Diensten und die Orchestrierung von Clustern. Das Repository enthält ein umfassendes Toolset für die DevOps-Automatisierung, einschließlich Skripten und Playbooks für CI/CD-Pipelines und die automatisierte Cluster-Installation. Es umfasst ein Computer-Vision-Demoprojekt für die Objekterkennung und Gesichtsanalyse sowie detaillierte Anleitungen und Konfigurationsdateien für Docker-Containerisierung und Kubernetes-Deployment. Das Projekt deckt ein breites Spektrum an Fähigkeiten für verteilte Systeme ab, darunter gRPC- und RESTful-API-Implementierung, Message Queuing und Data Streaming. Zudem adressiert es die Observability der Infrastruktur durch Distributed Tracing und System-Performance-Monitoring sowie Big-Data-Verarbeitung und Optimierung der Datenspeicherung. Die Codebasis enthält Implementierungsbeispiele für Java und Go und stellt Quellcode für die native Binärkompilierung sowie Multi-Stage-Container-Builds bereit.

GeoServer is an open-source geospatial data manager and publisher that shares, edits, and processes geographic information using open standards. It operates as an OGC geospatial server and web map service provider, delivering spatial data and calculated measurements to client applications via standardized web protocols. The platform enables the publishing of geospatial datasets from various file formats to web services and supports the modification and management of spatial datasets through a central server. It provides capabilities for remote spatial processing and the creation of searchable

This is an open-source video player application for Android that compiles native C and C++ libraries using the Android NDK and CMake. The build system automatically discovers the Android SDK from environment variables and selects the appropriate Java runtime (8, 11, or 17) for different build tools, while allowing control over which CPU architectures (ARM, x86) to target. The application manages media libraries by scanning local storage and fetching metadata from external services to organize video files with cover art, descriptions, and series grouping. It streams video from both local devic

This repository is a collection of Java backend projects, encompassing a web application suite, a real-time chat server, a web crawler, and an authentication system. It provides implementations for building server-side logic and business rules to process data and handle web requests. The project includes a networked messaging system for instant bidirectional communication and an automated web scraping engine that parses HTML to aggregate data into local storage. It also features a security framework for managing user permissions and generating visual captchas to prevent automated bot access.

light-4j is a Java microservices framework designed for building scalable distributed systems. It provides a toolkit for developing cloud-native services with integrated support for service discovery, telemetry, and secure inter-service communication. The project includes a runtime OpenAPI request validator to ensure communication consistency by checking data against formal specifications. It also features an OAuth2 API security gateway for verifying identity tokens and managing credentials, alongside an event-sourcing messaging system for building command query responsibility segregation arc