Java · 總榜 · 史上最強

Design patterns implemented in Java

mall项目是一套电商系统，包括前台商城系统及后台管理系统，基于Spring Boot+MyBatis实现，采用Docker容器化部署。 前台商城系统包含首页门户、商品推荐、商品搜索、商品展示、购物车、订单流程、会员中心、客户服务、帮助中心等模块。 后台管理系统包含商品管理、订单管理、会员管理、促销管理、运营管理、内容管理、统计报表、财务管理、权限管理、设置等模块。

Spring Boot helps you to create Spring-powered, production-grade applications and services with absolute minimum fuss.

Core Interview Questions & Answers For Experienced Java(Backend) Developers | 互联网 Java 工程师进阶知识完全扫盲：涵盖高并发、分布式、高可用、微服务、海量数据处理等领域知识

Free and Open Source, Distributed, RESTful Search Engine

Demonstrate all the questions on LeetCode in the form of animation.（用动画的形式呈现解LeetCode题目的思路,完整单步/回看/变速/语音讲解在 algomooc.com）

All Algorithms implemented in Java

Everything you need to know to get the job.

Termux - a terminal emulator application for Android OS extendible by variety of packages.

Spring Framework

Free universal database tool and SQL client

Google core libraries for Java

Dex to Java decompiler

【AI 时代的业务系统基座】企业级 AI 低代码平台：权限、多租户、工作流、报表、大屏、AI 知识库等通用能力开箱即用，AI 只需生成业务差异部分。AI Skills 一句话生成完整系统——建表、前后端代码、菜单权限、BPM 流程、表单、报表、大屏全自动。内置 AI 应用平台（聊天、知识库、流程编排、MCP），兼容主流大模型。Java + Vue3，支持单体/微服务与信创国产化。

RxJava – Reactive Extensions for the JVM – a library for composing asynchronous and event-based programs using observable sequences for the Java VM.

A type-safe HTTP client for Android and the JVM

Learn System Design concepts and prepare for interviews using free resources.

The java implementation of Apache Dubbo. An RPC and microservice framework.

A libre lightweight streaming front-end for Android.

官方推荐 RuoYi-Vue 全新 Pro 版本，优化重构所有功能。基于 Spring Boot + MyBatis Plus + Vue & Element 实现的后台管理系统 + 微信小程序，支持 RBAC 动态权限、数据权限、SaaS 多租户、Flowable 工作流、三方登录、支付、短信、商城、CRM、ERP、MES、IM、AI 大模型、IoT 物联网等功能。你的 Star ，是作者生发的动力！

Halo 是一款强大易用的开源建站工具，从个人博客、知识库，到企业官网、在线商城，Halo 都能助您轻松实现，一站式满足您的多样化建站需求。

Open Source Identity and Access Management For Modern Applications and Services

Alibaba Java Diagnostic Tool Arthas/Alibaba Java诊断利器Arthas

Getting Started with Spring Boot 3:

LeetCode solutions in any programming language | 多种编程语言实现 LeetCode、《剑指 Offer（第 2 版）》、《程序员面试金典（第 6 版）》题解

针对小白的算法训练 | 包括四部分：①.大厂面经 ②.力扣图解 ③.千本开源电子书 ④.百张技术思维导图（项目花了上百小时，希望可以点 star 支持，感谢~）推荐免费ChatGPT使用网站

Browse media content with your own rules on Android TV

Render After Effects animations natively on Android and iOS, Web, and React Native

Netty project - an event-driven asynchronous network application framework

An image loading and caching library for Android focused on smooth scrolling

A browser automation framework and ecosystem.

Apache Kafka - A distributed event streaming platform

ZXing ("Zebra Crossing") barcode scanning library for Java, Android

一个用来深入学习并实战 Spring Boot 的项目。

:fire: Android developers should collect the following utils(updating).

alibaba/easyexcel open-source repository on GitHub

an easy-to-use dynamic service discovery, configuration and service management platform for building AI cloud native applications.

微信开发 Java SDK ，支持包括微信支付，开放平台，小程序，企业微信，视频号，公众号等的后端开发

Conductor is an event driven agentic workflow engine providing durable and highly resilient execution engine for applications and AI Agents

Light, fluffy, and always free - The AWS Local Emulator alternative

A distributed task scheduling framework.（分布式任务调度平台XXL-JOB）

about learning Spring Boot via examples. Spring Boot 教程、技术栈示例代码，快速简单上手教程。

Telegram for Android source

A set of tools that keep Java sweet.

PDF Parser for AI-ready data. Automate PDF accessibility. Open-source.

Orchestrate everything, everywhere. The open-source control plane for workflows across data, infrastructure, business processes and AI agents. Declarative YAML, event-driven, any language, Git-versioned, scalable to millions of executions.

Apollo is a reliable configuration management system suitable for microservice configuration management scenarios.

阿里巴巴 MySQL binlog 增量订阅&消费组件

The automation tower defense RTS

Spring Cloud Alibaba provides a one-stop solution for application development for the distributed solutions of Alibaba middleware.

循序渐进，学习Spring Boot、Spring Boot & Shiro、Spring Batch、Spring Cloud、Spring Cloud Alibaba、Spring Security & Spring Security OAuth2，博客Spring系列源码：https://mrbird.cc

Chat2DB is a free, cross-platform, local-first database client and SQL workspace for developers, DBAs, analysts, and data teams. Connect to 40+ databases, manage data, edit and run SQL, and use your own AI model to generate, explain, and optimize queries. Available on desktop, web, Docker, and CLI, with MCP support.

阿里云计算平台DataWorks(https://help.aliyun.com/document_detail/137663.html) 团队出品，为监控而生的数据库连接池

微人事是一个前后端分离的人力资源管理系统，项目采用SpringBoot+Vue开发。

Learn Low Level Design (LLD) and prepare for interviews using free resources.

A tool for reverse engineering Android apk files

OpenAPI Generator allows generation of API client libraries (SDK generation), server stubs, documentation and configuration automatically given an OpenAPI Spec (v2, v3)

‍ Java Core Sprout : basic, concurrent, algorithm

Jenkins automation server

秒杀系统设计与实现.互联网工程师进阶与分析

Apache Flink

a fast, scalable, multi-language and extensible build system

:fire: Seata is an easy-to-use, high-performance, open source distributed transaction solution.

alibaba/fastjson open-source repository on GitHub

Desktop/Android/HTML5/iOS Java game development framework

LSPosed Framework

Bind Android views and callbacks to fields and methods.

To Be Top Javaer - Java工程师成神之路

下拉刷新、上拉加载、二级刷新、淘宝二楼、RefreshLayout、OverScroll，Android智能下拉刷新框架，支持越界回弹、越界拖动，具有极强的扩展性，集成了几十种炫酷的Header和 Footer。

APM, Application Performance Monitoring System

Event bus for Android and Java that simplifies communication between Activities, Fragments, Threads, Services, etc. Less code, better quality.

人人可用的开源 BI 工具，数据可视化神器。An open-source BI tool alternative to Tableau.

proxyee-down-org/proxyee-down open-source repository on GitHub

Hystrix is a latency and fault tolerance library designed to isolate points of access to remote systems, services and 3rd party libraries, stop cascading failure and enable resilience in complex distributed systems where failure is inevitable.

Redisson: Valkey & Redis Java Client and Real-Time Data Platform. Sync/Async/RxJava/Reactive API. Extends Valkey and Redis with over 60 objects and services: Set, Multimap, SortedSet, Map, List, Queue, Deque, Semaphore, Lock, AtomicLong, Map Reduce, Bloom filter, Spring, Tomcat, Scheduler, JCache API, Hibernate, RPC, local cache..

A Java serialization/deserialization library to convert Java Objects into JSON and back

This repository consists of the code samples, assignments, and notes for the Java data structures & algorithms + interview preparation bootcamp of WeMakeDevs.

FizzBuzz Enterprise Edition is a no-nonsense implementation of FizzBuzz made by serious businessmen for serious business purposes.

JDK main-line development https://openjdk.org/projects/jdk

A powerful flow control component enabling reliability, resilience and monitoring for microservices. (面向云原生微服务的高可用流控防护组件)

从源码层面，剖析挖掘互联网行业主流技术的底层实现原理，为广大开发者 “提升技术深度” 提供便利。目前开放 Spring 全家桶，Mybatis、Netty、Dubbo 框架，及 Redis、Tomcat 中间件等

Apache RocketMQ is a cloud native messaging and streaming platform, making it simple to build event-driven applications.

All-in-one IoT Platform - Device management, data collection, processing and visualization.

This project is deprecated and stale. The latest ExoPlayer code is available in https://github.com/androidx/media

eladmin jpa 版本：项目基于 Spring Boot 2.7.18、 Jpa、 Spring Security、Redis、Vue的前后端分离的后台管理系统，项目采用分模块开发方式， 权限控制采用 RBAC，支持数据字典与数据权限管理，支持一键生成前后端代码，支持动态路由

GraalVM compiles applications into native executables that start instantly, scale fast, and use fewer compute resources

Video players (IJKplayer, ExoPlayer, MediaPlayer), HTTPS, 16k page size, danmaku (bullet chat) support, external subtitles, support for filters, watermarks, and GIF screenshots, pre-roll and mid-roll ads, multiple simultaneous playback, basic seeking/dragging, volume and brightness adjustment, play-while-cache support

光 HikariCP・A solid, high-performance, JDBC connection pool at last.

Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.

IntelliJ IDEA & IntelliJ Platform

MyBatis SQL mapper framework for Java

一款面向泛前端产品研发全生命周期的效率平台。

又一个小商城。litemall = Spring Boot后端 + Vue管理员前端 + 微信小程序用户前端 + Vue用户移动端

一个涵盖六个专栏：Spring Boot 2.X、Spring Cloud、Spring Cloud Alibaba、Dubbo、分布式消息队列、分布式事务的仓库。希望胖友小手一抖，右上角来个 Star，感恩 1024

RxJava bindings for Android

ruoyi-vue-pro 全新 Cloud 版本，优化重构所有功能。基于 Spring Cloud Alibaba + MyBatis Plus + Vue & Element 实现的后台管理系统 + 用户小程序，支持 RBAC 动态权限、多租户、数据权限、工作流、三方登录、支付、短信、商城、CRM、ERP、MES、IM、AI 大模型、IoT 物联网等功能。你的 Star ，是作者生发的动力！

开源、免费、一站式 Java 权限认证框架，让鉴权变得简单、优雅！—— 登录认证、权限认证、分布式 Session 会话、微服务网关鉴权、SSO 单点登录、OAuth2.0 统一认证、jwt 集成、API Key 秘钥授权、API 参数签名

ANTLR (ANother Tool for Language Recognition) is a powerful parser generator for reading, processing, executing, or translating structured text or binary files.

CAT 作为服务端项目基础组件，提供了 Java, C/C++, Node.js, Python, Go 等多语言客户端，已经在美团点评的基础架构中间件框架（MVC框架，RPC框架，数据库框架，缓存框架等，消息队列，配置系统等）深度集成，为美团点评各业务线提供系统丰富的性能指标、健康状况、实时告警等。

A collection of algorithms and data structures