一个聊天程序范例：  这里有一个整理好的列表。

A curated list of awesome Java frameworks, libraries and software.

Ancients

In existence since the beginning of time and which will continue being used long after the hype has waned.

•  - Build process management with XML.
•  - Bytecode generation library.
•  - Application server and reference implementation for Java EE sponsored by Oracle.
•  - Continuous integration server still in active development.
•  - Oracle's open-source implementation of the JSF standard, Mojarra.
•  - Common templating for websites with custom tag libraries.

Bean Mapping

Frameworks that ease bean mapping.

•  - Mapper that copies data from one object to another, using annotations, API or XML configuration.
•  - Code generator which simplifies mappings between different bean types, based on a convention over configuration approach.
•  - ModelMapper is an intelligent object mapping library that automatically maps objects to each other.
•  - Orika is a Java Bean mapping framework that recursively copies (among other capabilities) data from one object to another.
•  - Stupid Simple Statically Linked Mapper. Selma is an Annotation Processor Based bean mapper.

Build

Tools which handle the build cycle and dependencies of an application.

•  - Declarative build and dependency management which favors convention over configuration. It might be preferable to Apache Ant which uses a rather procedural approach and can be difficult to maintain.
•  - Build tool from Google that builds code quickly and reliably.
•  - Incremental builds which are programmed via Groovy instead of declaring XML. Works well with Maven's dependency management.

Bytecode Manipulation

Libraries to manipulate bytecode programmatically.

•  - All purpose, low level, bytecode manipulation and analysis.
•  - Further simplifies bytecode generation with a fluent API.
•  - Manipulate bytecode at runtime via DSL (rules) mainly for testing/troubleshooting.
•  - Tries to simplify the editing of bytecode.

Cluster Management

Frameworks which can dynamically manage applications inside of a cluster.

•  - Apache Aurora is a Mesos framework for long-running services and cron jobs.
•  - Singularity is a Mesos framework that makes deployment and operations easy. It supports web services, background workers, scheduled jobs, and one-off tasks.

Code Analysis

Tools that provide metrics and quality measurements.

•  - Static analysis of coding conventions and standards.
•  - Catches common programming mistakes as compile-time errors.
•  - Static analysis of bytecode to find potential bugs.
•  - Static code analysis with Neo4J-based query language.
•  - Source code analysis for finding bad coding practices.
•  - Integrates other analysis components via plugins and provides an overview of the metrics over time.

Compiler-compiler

Frameworks that help to create parsers, interpreters or compilers.

•  - Complex full-featured framework for top-down parsing.
•  - More specific and slightly easier to learn. Has syntactic lookahead.

Configuration

Libraries that provide external configuration.

•  - Configuration library for JVM languages.
•  - Reduces boilerplate of properties.

Constraint Satisfaction Problem Solver

Libraries that help on implementing optimization and satisfiability problems.

•  - Off-the-shelf constraint satisfaction problem solver, which uses constraint programming techniques.
•  - Includes an interface for the FlatZinc language, enabling it to execute MiniZinc models.
•  - Business planning and resource scheduling optimization solver.
•  - State-of-the-art SAT solver for boolean and optimization problems.

Continuous Integration

Tools which support continuously building, testing and releasing applications.

•  - Atlassian's solution with good integration of their other products. You can either apply for an open-source license or buy it.
•  - Hosted service with a free trial.
•  - Hosted services with a limited free plan.
•  - Integration platform for containers.
•  - ThoughtWork's open-source solution.
•  - Provides server-based deployment services.
•  - JetBrain's CI solution with a free version.
•  - Hosted service often used for open-source projects.

CSV

Frameworks and libraries that simplify reading/writing CSV data.

•  - Simple CSV parser with a commercial-friendly license.
•  - One of the fastest and most feature-complete CSV. Also comes with parsers for TSV and fixed width records.

Database

Everything which simplifies interactions with the database.

•  - High performance relational database layer over HBase for low latency applications.
•  - Distributed data store that implements data synchronization, sharding, scaling, and replication. In addition, it provides a SQL-based syntax to execute queries across a cluster.
•  - Simple database migration tool.
•  - Small SQL Database notable for its in-memory functionality.
•  - High performance JDBC connection pool.
•  - Convenient abstraction of JDBC.
•  - A small client for interaction with redis, with methods for commands.
•  - Generates typesafe code based on SQL schema.
•  - Database-independent library for tracking, managing and applying database schema changes.
•  - Embedded database engine that provides concurrent collections backed on disk or in off-heap memory.
•  - Distributed SQL query engine for big data.
•  - Typesafe unified queries.
•  - Allows for distributed and scalable data structures on top of a Redis server.
•  - Brings metrics and failover strategies to the most common connection pooling solutions.

Data structures

Efficient and specific data structures.

•  - Columnar storage format based on assembly algorithms from the Dremel paper by Google.
•  - Google's data interchange format.
•  - Simple Binary Encoding, one of the fastest message formats around.
•  - Clean, lightweight protocol buffers.
•  - Data interchange format that originated at Facebook.
•  - Data interchange format featuring among others: dynamic typing, untagged data, absence of manually assigned IDs.

Date and Time

Libraries related to handling date and time.

•  - De facto standard date/time-library before Java 8.
•  - Port of JSR 310 (java.time package) by the author of Joda-Time.
•  - Advanced date and time library.

Dependency Injection

Libraries that help to realize the  paradigm.

•  - CDI extension framework.
•  - Compile-time injection framework without reflection.
•  - Lightweight but powerful framework that completes Dagger.
•  - Light-weight and dynamic dependency injection framework.

Development

Augmentation of the development process at a fundamental level.

•  - JSR-269 code generator for algebraic data types.
•  - Seamless aspect-oriented programming extension.
•  - Collection of source code generators.
•  - Modification of the JVM that allows unlimited redefinition of loaded classes at runtime.
•  - Unlimited runtime class and resource redefinition.
•  - Scala-like case classes.
•  - Yeoman source code generator to create applications based on Spring Boot and AngularJS.
•  - Commercial software that instantly reloads code and configuration changes without redeploys.
•  - Code-generator which aims to reduce the verbosity.
•  - Class reloading agent.
•  - Polyglot event-driven application framework.

Distributed Applications

Libraries and frameworks for writing distributed and fault-tolerant applications.

•  - Toolkit and runtime for building concurrent, distributed, and fault tolerant event-driven applications.
•  - Realtime computation system.
•  - Coordination service with distributed configuration, synchronization, and naming registry for large distributed systems.
•  - Framework for creating CQRS applications.
•  - Highly scalable in-memory datagrid.
•  - Provides latency and fault tolerance.
•  - Toolkit for reliable messaging and creating clusters.
•  - Virtual Actors, adding another level of abstraction to traditional actors.
•  - Lightweight threads and actors for the JVM.

Distributed Databases

Databases in a distributed system that appear to applications as a single data source.

•  - Column-oriented and providing high availability with no single point of failure.
•  - Hadoop database for big data.
•  - Real-time and historical OLAP data store that excel at aggregation and approximation queries.
•  - Highly concurrent key/value datastore used for caching.
•  - Scalable and distributed time series database written on top of Apache HBase.

Distribution

Tools which handle the distribution of applications in native formats.

•  - Version control for binaries which handles the publishing. Can also be used with Maven or Gradle and has a free plan for open-source software or several business plans.
•  - Simple and powerful packaging and deployment. A fat JAR on steroids or a "Docker for Java" that supports JVM-optimized containers.
•  - Largest binary component repository available as a free service to the open-source community. Default used by Apache Maven and available in all other build tools.
•  - Setup authoring tool for cross-platform deployments.
•  - Easy to use package repository for GitHub. Builds Maven/Gradle projects on demand and publishes ready-to-use packages.
•  - Wraps JARs in lightweight and native Windows executables.
•  - Binary management with proxy and caching capabilities.
•  - Packs JARs, assets and the JVM for native distribution on Windows, Linux and Mac OS X.

Document Processing

Libraries that assist with processing office document formats.

•  - Supports OOXML (XLSX, DOCX, PPTX) as well as OLE2 (XLS, DOC or PPT).
•  - API for document format conversion using third-party converters such as MS Word.
•  - Processes the OpenDocument format.

Formal Verification

Formal-methods tools: proof assistants, model checking, symbolic execution etc.

•  - Concolic unit testing engine. Automatically generates unit tests using formal methods.
•  - Pluggable type systems. Includes nullness types, physical units, immutability types and more.
•  - Daikon detects likely program invariants and can generate JML specs based on those invariats.
•  - Behavioral interface specification language that can be used to specify the behavior of code modules. It combines the design by contract approach of Eiffel and the model-based specification approach of the Larch family of interface specification languages, with some elements of the refinement calculus. Used by several other verification tools.
•  - JVM formal verification tool containing a model checker and more. Created by NASA.
•  - Concolic unit testing engine that automatically generates unit tests. Concolic execution combines randomized concrete execution with symbolic execution and automatic constraint solving.
•  - Detects nonconformances between code and JML specification through the feedback-directed random tests generation, and suggests a likely cause for each nonconformance detected.
•  - The KeY System is a formal software development tool that aims to integrate design, implementation, formal specification, and formal verification of object-oriented software as seamlessly as possible. Uses JML for specification and symbolic execution for verification.
•  - Translates JML specifications into SMT-LIB format and passes the proof problems implied by the program to backend solvers.

Functional Programming

Libraries that facilitate functional programming.

•  - Monad and stream utilities, comprehensions, pattern matching, trampolines and much more.
•  - Functional extensions to Guava.
•  - Implements numerous basic and advanced programming abstractions that assist composition-oriented development.
•  - Functional component library that provides persistent data types and functional control structures.
•  - Extension to Java 8 which aims to fix gaps in lambda, providing numerous missing types and a rich set of sequential Stream API additions.
•  - Java 8 annotation processor and framework for deriving algebraic data types constructors, pattern-matching, morphisms.

Game Development

Frameworks that support the development of games.

•  - Game engine for modern 3D development.
•  - All-round cross-platform, high-level framework.
•  - Robust framework that abstracts libraries like OpenGL/CL/AL.

GUI

Libraries to create modern graphical user interfaces.

•  - The successor of Swing.
•  - Visual layout tool for JavaFX applications.
•  - The Standard Widget Toolkit (SWT) is a graphical widget toolkit for use with the Java platform.

High Performance

Everything about high performance computation, from collections to specific libraries.

•  - Data structures and utility methods that are common in high-performance applications.
•  - Inter-thread messaging library.
•  - Fast and compact type-specific collections.
•  - Collection framework inspired by Smalltalk.
•  - Primitive collections.
•  - Library for real-time and embedded systems.
•  - Concurrency tools currently missing from the JDK.
•  - Hash sets and hash maps.
•  - Primitive collections.

IDE

Integrated development environments that try to simplify several aspects of development.

•  - Established, open-souce project with support for lots of plugins and languages.
•  - Supports a lot of JVM languages and provides good options for Android development. The commercial edition targets the enterprise sector.
•  - Provides integration for several Java SE and EE features from database access to HTML5.

Imagery

Libraries that assist with the creation, evaluation or manipulation of graphical images.

•  - Simple and efficient hardware-accelerated image-scaling library implemented in pure Java 2D.
•  - Image downloading and caching library for Android.
•  - Thumbnailator is a high-quality thumbnail generation library for Java.
•  - Multi-format 1D/2D barcode image processing library.

JSON

Libraries that simplify JSON processing.

•  - Powerful and easy to use Java to JSON conversion library.
•  - Serializes objects to JSON and vice versa. Good performance with on-the-fly usage.
•  - Similar to GSON but has performance gains if you need to instantiate the library more often.
•  - JSON parsing and serializing library based on Jackson's streaming API. Outpeforms GSON & Jackson's library.

JVM and JDK

Current implementations of the JVM/JDK.

•  - Early access releases of JDK 9.
•  - Open-source implementation.

Languages

Languages other than Java that can be used to write JVM applications.

•  - Statically typed programming language that fuses the object - oriented model and functional programming ideas.
•  - Optionally typed and dynamic language, with static-typing and static compilation capabilities. Currently an incubating Apache project
•  - Dynamically typed programming language that can be seen as a modern take on Lisp.
•  - Statically typed object-oriented language developed by RedHat.
•  - JetBrain's statically typed programming language for the JVM, Android and the browser.
•  - A simple dynamic language that makes extensive usage of invokedynamic, currently an incubating Eclipse Technology project.

Logging

Libraries that log the behavior of an application.

•  - Complete rewrite with a powerful plugin and configuration architecture.
•  - Analyzes and visualizes log files.
•  - Robust logging library with interesting configuration options via Groovy.
•  - Tool for managing log files.
•  - Expose metrics via JMX or HTTP and can send them to a database.
•  - Abstraction layer which is to be used with an implementation.

Machine Learning

Tools that provide specific statistical algorithms which allow learning from data.

•  - Fast and reliable large-scale data processing engine.
•  - Storage and large-scale processing of data-sets on clusters of commodity hardware.
•  - Scalable algorithms focused on collaborative filtering, clustering and classification.
•  - Data analytics cluster computing framework.
•  - Creates structured information from unstructured data and integrates it into an existing database.
•  - Distributed and multi-threaded deep learning library.
•  - Analytics engine for statistics over big data.
•  - Algorithms for pre-processing, classification, regression, and clustering with support for multi-threaded execution.
•  - Collection of algorithms for data mining tasks ranging from pre-processing to visualization.

Messaging

Tools that help to send messages between clients in order to ensure protocol independency.

•  - Efficient reliable unicast and multicast message transport.
•  - Message broker that implements JMS and converts synchronous to asynchronous communication.
•  - Glues together different transport APIs via Enterprise Integration Patterns.
•  - High-throughput distributed messaging system.
•  - Fast and reliable message broker built on top of Kafka.
•  - Clear, concise, modular and made to be embedded.
•  - Implementation of ZeroMQ.
•  - Cross-platform XMPP client library.

Miscellaneous

Everything else.

•  - Implementation and explanation of the most common design patterns.
•  - In-memory file system.
•  - Easy console text GUI library similar to curses.
•  - Pluggable CRUD UI library for rapid application development.
•  - Tool for working with messy data: cleaning, transforming, extending it with web services and linking it to databases.
•  - Commercial framework with a free trial to write native iOS apps.

Monitoring

Tools that monitor applications in production.

•  - Commercial performance monitor.
•  - Performance monitoring and profiling.
•  - Tool to connect to multiple JVMs and to query them for their attributes via JMX. Its query language is based on JSON, which allows non-Java programmers to access the JVMs attributes. Likewise, this tool supports different output writes, including Graphite, Ganglia, StatsD, among others.
•  - Tool for monitoring applications running on the JVM.
•  - Commercial performance monitor.
•  - Commercial performance monitor with distributing transaction tracing for JVM apps.
•  - Commercial in-production error monitoring and debugging.

Native

For working with platform-specific native libraries.

•  - Work with native libraries without writing JNI. Also provides interfaces to common system libraries.
•  - Work with native libraries without writing JNI. Also provides interfaces to common system libraries. Same goals as JNA, but faster, and serves as the basis for the upcoming .

Natural Language Processing

Libraries that specialize on processing text.

•  - Toolkit for common tasks like tokenization.
•  - Stanford's CoreNLP provides a set of fundamental tools for tasks like tagging, named entity recognition, sentiment analysis and many more.
•  - Toolkit for a variety of tasks ranging from POS tagging to sentiment analysis.
•  - Statistical natural language processing, document classification, clustering, topic modeling and more.

Networking

Libraries for network programming.

•  - Asynchronous HTTP and WebSocket client library.
•  - NIO framework. Used as a network layer in Glassfish.
•  - Framework for building high performance network applications.
•  - HTTP+SPDY client.
•  - Web server providing both blocking and non-blocking API’s based on NIO. Used as a network layer in WildFly.

ORM

APIs which handle the persistence of objects.

•  - Provides simple and fast data access.
•  - Supports a number of persistence standards: JPA, JAXB, JCA and SDO.
•  - Robust and widely used with an active community.
•  - Couples objects with stored procedures or SQL statements.
•  - Lightweight package avoiding the complexity and overhead of other ORM products.

PDF

Everything that helps with the creation of PDF files.

•  - Creates PDF from XSL-FO.
•  - Toolbox for creating and manipulating PDF.
•  - Simplifies JasperReports.
•  - XML/XHTML and CSS 2.1 renderer.
•  - Creates PDF files programmatically but requires a license for commercial purposes.
•  - Complex reporting engine.

Performance analysis

Tools for performance analysis, profiling and benchmarking.

•  - Logs and records platform JVM stalls.
•  - Microbenchmarking tool for the JVM.
•  - Commercial profiler.
•  - Utilities for latency measurement and reporting.
•  - Visual interface for detailed information about running applications.
•  - Commercial profiler.

Reactive libraries

Libraries for developing reactive applications.

•  - Provide a standard for asynchronous stream processing with non-blocking backpressure.
•  - Library for building reactive fast-data applications.
•  - Library for composing asynchronous and event-based programs using observable sequences from the JVM.

REST Frameworks

Frameworks specifically for creating RESTful services.

•  - Opinionated framework for setting up modern web applications with Jetty, Jackson, Jersey and Metrics.
•  - HTTP client binder inspired by Retrofit, JAXRS-2.0, and WebSocket.
•  - JAX-RS reference implementation.
•  - Fully certified and portable implementation of the JAX-RS specification.
•  - Thin wrapper on the JBOSS Netty HTTP stack to provide scaling and performance.
•  - Framework based on annotation processing and compile-time source generation.
•  - Type-safe REST client.
•  - Sinatra inspired framework.
•  - Swagger is a specification and complete framework implementation for describing, producing, consuming, and visualizing RESTful web services.

Science

Libraries for scientific computing and analysis.

•  - Environment for scientific computation, data analysis and data visualization.
•  - Graph library that provides mathematical graph-theory objects and algorithms.
•  - Provides a set of classes to work with scientific measurements and units.

Search

Engines which index documents for search and analysis.

•  - Enterprise search engine optimized for high volume traffic.
•  - Distributed, multitenant-capable full-text search engine with a RESTful web interface and schema-free JSON documents.

Security

Libraries that handle security, authentication, authorization or session management.

•  - Performs authentication, authorization, cryptography and session management.
•  - All-purpose cryptographic library. JCA provider, wide range of functions from basic helpers to PGP/SMIME operations.
•  - Multiplatform transparent client-side encryption of files in the cloud.
•  - Easy to use, yet safe encryption framework with key versioning.
•  - Integrated SSO and IDM for browser apps and RESTful web services.
•  - Umbrella project for security and identity management.

Serialization

Libraries that handle serialization with high efficiency.

•  - Memory efficient serialization library that can access serialized data without unpacking and parsing it.
•  - Fast and efficient object graph serialization framework.
•  - JDK compatible high performance object graph serialization.
•  - Efficient binary serialization format.

Server

Servers which are specifically used to deploy applications.

•  - Robust all-round server for Servlet and JSP.
•  - Tomcat plus Java EE.
•  - Lightweight, small server, often embedded in projects.
•  - Lightweight, modular server developed by IBM
•  - Formerly known as JBoss and developed by Red Hat with extensive Java EE support.

Template Engine

Tools which substitute expressions in a template.

•  - Templates for HTML pages, emails or source code generation in general.
•  - General templating engine without any heavyweight or opinionated dependencies.
•  - Logic-less and semantic Mustache templates.
•  - Aims to be a substitute for JSP and works for XML files in general.

Testing

Tools that test from model to the view.

•  - Functional testing and performance measurements.
•  - Integration and functional testing platform for Java EE containers.
•  - Fluent assertions that improve readability.
•  - DSL for synchronizing asynchronous operations.
•  - Integration testing framework with focus on client- and serverside messaging.
•  - BDD testing framework.
•  - Load testing tool designed for ease of use, maintainability and high performance.
•  - Matchers that can be combined to create flexible expressions of intent.
•  - Developer-friendly BDD testing framework compatible with JUnit and TestNG
•  - Mocks static, final methods and more.
•  - Common testing framework.
•  - Creation of readable and maintainable parametrised tests.
•  - Creation of test double objects in automated unit tests for the purpose of TDD or BDD.
•  - Enables mocking of static methods, constructors, final classes and methods, private methods and removal of static initializers.
•  - Java DSL for easy testing for REST/HTTP services.
•  - Concise API around Selenium to write stable and readable UI tests.
•  - Portable software testing framework for web applications.
•  - JUnit-compatible framework featuring an expressive Groovy-derived specification language.
•  - Testing framework.
•  - Google's assertion and proposition framework.
•  - Modular testing library for unit and integration testing.
•  - Stubbs and mocks web services.
•  - Concise web services for stubs and mocks, Duke's Choice Award 2013.
•  - In-memory email server for integration testing. Supports SMTP, POP3 and IMAP including SSL.

Utility

Libraries which provide general utility functions.

•  - Provides different general purpose functions like configuration, validation, collections, file upload or XML processing.
•  - Command line arguments parser.
•  - Provides a CLI for running processes.
•  - Cross-platform for visualizing and manipulating large graph networks.
•  - Collections, caching, primitives support, concurrency libraries, common annotations, string processing, I/O, and so forth.
•  - Framework and environment for building and to debugging multi-agent systems.
•  - Tuples.
•  - Command line arguments parser.
•  - Provides an ontology editor and a framework to build knowledge-based systems.

Web Crawling

Libraries that analyze the content of websites.

•  - Highly extensible, highly scalable web crawler for production environment.
•  - Simple and lightweight web crawler.
•  - Scrapes, parses, manipulates and cleans HTML.

Web Frameworks

Frameworks that handle the communication between the layers of an web application.

•  - Component-oriented framework for creating dynamic, robust, highly scalable web applications.
•  - Component-based web application framework similar to Tapestry with a stateful GUI.
•  - Toolbox which includes a Java-to-JavaScript compiler for client-side code, XML parser, API for RPC, JUnit integration, internationalization support and widgets for the GUI.
•  - Groovy framework with the aim to provide a highly productive environment by favoring convention over configuration, no XML and support for mixins.
•  - Full stack web framework.
•  - Small, highly modularized Sinatra-like framework.
•  - Uses convention over configuration, hot code reloading and display of errors in the browser.
•  - JSF framework which has a free and a commercial version with support. Provides several frontend components.
•  - Set of libraries that facilitate fast, efficient, evolvable and well tested HTTP applications.
•  - Microframework which simplifies the development of new Spring applications.
•  - Provides many packages ranging from dependency injection to aspect-oriented programming to security.
•  - Small and efficient framework, Not only for web application.
•  - Interesting web applications.
•  - Event-driven framework build on top of GWT. Uses server-side architecture with Ajax on the client-side.

Resources Communities

Active discussions.

•  - Subreddit for the Java community.
•  - Question/answer platform.
•  - Virtual Java User Group.

Influential Books

Books that had a high impact and are still worth reading.

Podcasts

Something to listen to while programming.

•  - Discontinued as of 02/2015.

Twitter

Active accounts to follow. Descriptions from Twitter.

•  - Freelancer: Author, JavaONE Rockstar Speaker, Consultant, Java Champion.
•  - Performance Geek, Benchmarking Tzar, Concurrency Bug Hunter.
•  - Java Champion, JUG Leader, Devoxx France, Java EE 6/7, JCP, Author.
•  - Java Champion, JavaOne Rockstar, UG Leader, Devoxx4Kids-er, Red Hatter.
•  - Java Language Architect at Oracle.
•  - Product Manager/Java Jock at Oracle.
•  - Consulting Member of the Technical Staff at Oracle.
•  - Author of the Spring Security Course.
•  - Java/JavaFX/IoT developer, author and speaker.
•  - Official Java EE Twitter account.
•  - Official Java Magazine account.
•  - Official Java.net account.
•  - Official Java Twitter account.
•  - Well-known Java blogger.
•  - Founder and CEO Data Geekery (jOOQ).
•  - RedHatter, JUG coordinator, frequent speaker and author.
•  - Chief Architect, Java Platform Group, Oracle.
•  - Java EE evangelist, Red Hat.
•  - London JUG co-leader, speaker, author, Java Champion and much more.
•  - Pasty faced performance gangster.
•  - Official OpenJDK account.
•  - Peter Lawrey, Java performance expert.
•  - Java EE/GlassFish/WebLogic evangelist, author, speaker, open source hacker.
•  - Java EE/JPA expert, speaker, open source.
•  - Java Champion, virtualJUG founder, LJC leader, RebelLabs author.
•  - Java Champion, speaker.
•  - Author and NetBeans guru.
•  - Java Champion and speaker.

Websites

Sites to read.

Contributing

Contributions are very welcome!

Please have a look at  for guidelines.