This article explains how to configure and tune Spring Boot's embedded Tomcat, adjust JVM parameters, enable remote debugging, and connect monitoring tools such as JConsole and JVisualVM, providing practical steps and code examples for improved performance and easier troubleshooting in production environments.
This article walks through a series of practical experiments—ranging from baseline Flux tests to lazy initialization, JVM options, dependency exclusions, and AppCDS—to dramatically reduce Spring Boot application startup time, ultimately achieving sub‑second launch speeds.
This article explains the mica-auto library, which uses Java annotation processing to automatically generate Spring Boot starter configurations, streamline component registration, and simplify multi‑module Spring Cloud projects, while providing Maven and Gradle integration details and recent change logs.
This tutorial walks through installing RabbitMQ, configuring it in a Spring Boot project, defining message models and enums, implementing delayed messaging to automatically cancel unpaid orders, and provides complete Java code, configuration files, testing steps, and useful resources for building a robust backend order system.
This tutorial walks through integrating MongoDB into a Spring Boot mall project, covering installation, configuration, Spring Data MongoDB usage, defining document and repository classes, implementing service and controller layers, and testing CRUD operations for product browsing records.
This tutorial walks you through installing Graylog with Docker‑Compose, configuring it for Spring Boot, and routing Logback and Log4j2 logs to Graylog, while also comparing Graylog to the ELK stack and providing source links for the full projects.
This guide walks through installing Elasticsearch and Kibana, configuring a Chinese analyzer, defining Spring Data Elasticsearch annotations, creating repository and service layers, building a REST controller, and testing product search functionality within a Spring Boot mall application.
A curated list of 13 high‑quality Spring Boot open‑source projects—including e‑commerce platforms, microservice frameworks, payment systems, and ERP solutions—each with brief descriptions, key features, and demo links to help Java developers find valuable codebases for learning and real‑world use.
This article explains what Spring Cloud is, its advantages for distributed microservices, the meaning of service registration and discovery, the purpose of load balancing, how Hystrix provides fault tolerance and circuit breaking, the role of Netflix Feign, and the function of Spring Cloud Bus for configuration refresh across instances.
This tutorial walks through building a Spring Boot backend with user registration, login, JWT token generation, Swagger UI configuration, and method-level permission annotations, providing complete code examples and step‑by‑step instructions for secure authentication and authorization.
This guide walks you through installing Redis, adding Maven dependencies, configuring Spring Boot, creating a Redis service interface and implementation, and building controller endpoints to generate and verify SMS verification codes, complete with code examples and deployment instructions.
This tutorial walks through integrating Swagger‑UI into the mall‑tiny Spring Boot project, covering Maven dependencies, Java configuration, adding Swagger annotations to controllers, customizing MyBatis Generator to emit @ApiModelProperty, regenerating model code, and finally viewing and testing the generated API docs via the Swagger‑UI interface.
This article provides a comprehensive tutorial on Spring Boot, covering its purpose, key advantages, project setup with Maven, essential configuration files, integration of JdbcTemplate, JPA, MyBatis, JSP, AOP, and task scheduling, all illustrated with complete Java code snippets.
The Mall project is a comprehensive e‑commerce solution featuring a front‑end storefront and back‑office management, implemented with Spring Boot, MyBatis, and a suite of modern technologies such as Redis, Elasticsearch, RabbitMQ, Docker, and more, offering modules for products, orders, marketing, and analytics.
This article compiles essential Spring Boot best practices—from custom BOMs and auto‑configuration to logging, testing, and exception handling—offering developers actionable guidance to streamline microservice development, improve code quality, and maintain scalable, maintainable Java applications.
MyBatis 3.5 now supports Java's Optional in mapper methods, allowing developers to replace verbose null‑checking code with concise, expressive calls, while noting that MyBatis Generator and some third‑party mappers have not yet adopted this feature.
This article examines the limitations of Spring Cloud Config—especially Git‑based permission control and coarse granularity—explains why a database‑backed configuration center is preferable, and details a custom long‑polling refresh mechanism built with Spring's DeferredResult and asynchronous servlets.
Spring Boot imposes no strict project layout, but adopting a recommended package structure—placing the main application class in a root package and organizing domain, service, and web layers under it—prevents configuration pitfalls and ensures automatic component scanning, while alternative scanning methods like @ComponentScan and @Bean can handle non‑standard layouts.
This tutorial walks you through setting up a Spring Boot 2.1.3 project using Maven, covering environment prerequisites, two creation methods (Spring Initializr and IntelliJ IDEA plugin), project structure, configuration, essential dependencies, a HelloWorld REST controller, unit testing, and important deployment tips.
This article explains what Spring Boot and Spring Cloud are, why they are used, their configuration file types, hot‑deployment methods with code examples, the differences between JPA and Hibernate, and the main components of Spring Cloud such as Eureka, Ribbon, Hystrix, Zuul and Config.
This tutorial walks you through creating a Spring Boot project with Spring Initializr, explains its lightweight advantages, shows how to set up the project structure, configure Maven dependencies, implement a simple HTTP endpoint, and write unit tests, all using Java and Maven.
This article explains Spring's annotation‑based caching, analyzes why the default cache key collides in multi‑tenant scenarios, shows how to embed tenant identifiers into keys, and provides a custom CacheManager implementation that parses TTL from the cache name and applies it to Redis entries.
Mica is a Java‑8 based microservice framework that evolved from lutool, offering servlet and reactive WebFlux support, auto‑configuration via Spring Boot and Spring Cloud without third‑party dependencies, modular components, LGPL‑v3 licensing, and detailed update notes for developers.
The article describes the motivation, analysis, architecture, performance optimizations, development challenges, and future plans of JD Finance’s LEGO backend platform, which uses Spring Boot, SpEL, Redis, and reactive programming to enable dynamic, high‑performance page configuration for a high‑traffic mobile app.
The article explains mica-auto, a core component of the Mica Spring Cloud microservice framework that automatically generates essential Spring Boot starter configurations, outlines its usage scenarios, features, integration methods for Maven and Gradle, licensing, and provides visual guides for developers.
This open‑source project offers a Spring Cloud Finchley‑based RBAC permission system using Spring Security OAuth2, a data‑driven Element‑ui front‑end that works without Vue experience, and full container support (Docker, Kubernetes, Rancher2) plus production‑ready lambda, Stream API and WebFlux examples, with detailed dependency listings and contribution guidelines.
This guide explains how to create clear, hierarchical service names for microservices, defines environment partitions, shows how to use the Mica launcher with Spring Boot, and demonstrates custom configuration, plugin extension, and code examples for streamlined backend development.
This guide explains how Mica-Log4j2 provides environment‑specific log configurations, high‑throughput asynchronous logging via Disruptor, replaces System.out/err in non‑dev modes, and shows Maven/Gradle dependencies, system settings, custom log levels, file structures, and open‑source resources for Spring Boot applications.
This guide explains the purpose of the mica-boot-test component, shows how to add its Maven or Gradle dependency, and provides two example test classes demonstrating the use of @MicaBootTest with either @RunWith(MicaSpringRunner.class) or inheritance from MicaBaseTest.
The article explains the purpose, usage scenarios, features, dependency setup, build process, and licensing of mica-auto, a component that generates essential Spring Boot starter configurations for the Mica microservice framework, helping avoid package inconsistencies and streamline development.
This article presents the design, architecture, and technology choices of a Sonar monitoring system for Spring Boot microservices, covering time‑series database selection, deployment topology, client collection strategies, and future plans for advanced analytics and AI‑driven alerting.
This article explains how to select the appropriate Spring Cloud Alibaba version by clarifying its relationship with Spring Boot and Spring Cloud, provides a Maven BOM snippet, a compatibility matrix, and points to a comprehensive tutorial series for building micro‑service applications.
Dubbo Admin 0.1, a freshly refactored standalone project, replaces the old Webx backend with Spring Boot, adopts Vue and Vuetify for the UI, integrates Swagger, and introduces updated configuration, tag routing, application‑level service governance, and metadata‑driven testing to fully support Dubbo 2.7 features.
Spring’s shift from XML to annotation‑based configuration is explained, covering @Configuration and @Bean requirements, example Java classes, equivalent XML, annotation definitions, bean scopes, component scanning, unit‑testing, and practical tips for wiring beans without field injection, providing a complete guide for modern Spring development.
This article introduces Spring Boot, explains its advantages over traditional Spring projects, describes JavaConfig, shows how to use DevTools for automatic reloads, outlines Actuator monitoring, and provides practical guidance on security, YAML configuration, ActiveMQ integration, and pagination with Spring Data JPA.
This article presents a curated list of the most popular Java open‑source projects on GitHub for January, summarizing each repository’s purpose, key features, and star count to help developers discover valuable resources for learning, building, and advancing Java applications.
This guide walks through integrating Codecentric's Chaos Monkey into a Spring Boot microservice ecosystem, covering dependency setup, configuration, actuator endpoints, Dockerized MySQL, performance testing with Gatling, and timeout tuning for Feign and Ribbon clients to simulate real‑world failures.
This article explains how to configure Spring Boot Actuator to export metrics to InfluxDB and Prometheus, covering Docker setup, Micrometer dependencies, application properties, sample controller code, test data generation, and visualisation with Grafana.
Groovy, a dynamic JVM language praised for its concise syntax and powerful features like closures, has re‑entered the TIOBE Top 20 thanks to its role in Jenkins and Gradle, offering Java developers a compelling boost to Spring Boot productivity.
This article dissects how a simple Spring Boot Hello World application launches, walks through the runtime call stacks, explains the FatJar packaging and custom ClassLoader, and reveals how @RestController classes are automatically registered with the embedded Tomcat server.
This tutorial walks you through using Nacos as a centralized configuration center in a Spring Cloud application, covering the benefits of Nacos config management, creating configuration entries, setting up a Spring Boot project with the required dependencies, implementing a refreshable controller, and verifying dynamic updates at runtime.
This article lists and briefly describes the eleven most popular Java‑related GitHub repositories in December, covering learning guides, e‑commerce platforms, advanced Java topics, performance monitoring, high‑concurrency demos, diagnostic tools, Spring Boot, tutorials, messaging middleware, community software, and the Dubbo RPC framework.
This tutorial walks you through installing Nacos, configuring Spring Cloud Alibaba for service registration and discovery, building provider and consumer Spring Boot applications, and testing load‑balanced calls, offering a complete hands‑on guide to cloud‑native microservice integration.
This guide explains how to build a Spring Boot starter that automatically counts and logs the number of entries for each entity at application startup, covering starter concepts, Maven setup, code implementation, auto‑configuration, and integration into a main project.
This article explains why migrating a Spring Boot app from Java 8 to Java 11 is necessary, compares OpenJDK and commercial licenses, outlines Spring's Java‑11 support, and provides detailed migration steps, dependency updates, and Maven/Gradle configuration changes.
This article explores the inner workings of Spring Boot by dissecting a simple Hello World application, analyzing its startup sequence, class loading via FatJar, the custom JarLauncher, and automatic registration of RestControllers, while highlighting performance considerations and the complexity of its annotation-driven configuration.
After moving to Spring Boot, the application consumed up to 7 GB of native memory because Meituan’s MCC package scanner invoked Spring’s ZipInflaterInputStream, which allocated large off‑heap buffers during JAR decompression that were only freed by the JVM finalizer and retained by glibc’s 64 MB arenas; restricting the scan scope or upgrading to Spring Boot 2.0.5 eliminated the excess usage.
This article provides a comprehensive analysis of Spring AOP's core proxy mechanisms, detailing the roles of advisor, advice, and pointcut classes, the annotation‑driven configuration process, and how Spring Boot automatically creates proxies using JDK or CGLIB based on configuration flags.
This article provides a comprehensive analysis of Spring AOP, covering its core classes, multiple proxy mechanisms, annotation‑based configuration in Spring Boot, the differences between Spring Boot 1.x and 2.x AOP settings, and detailed source‑code snippets that illustrate how advisors, pointcuts, and advices are created and applied.
This article chronicles the evolution of the Spring ecosystem—from its origins as a lightweight dependency‑injection framework, through rapid version growth and corporate changes, to the emergence of Spring Boot and Spring IO, highlighting key releases, architectural shifts, and the impact on Java backend development.
This comprehensive guide explains how to design and implement functional tests for a Spring Boot microservice using Docker containers, REST‑Assured, WireMock, and Testcontainers, covering architecture, code examples, test configuration, and best practices for maintainable black‑box testing.
This tutorial walks through the design and implementation of a distributed configuration center using Spring Boot, demonstrating how to define configuration entities, apply the observer pattern for dynamic updates, and integrate a thread‑pooled scheduler to keep configuration in sync without restarting services.
This tutorial walks through persisting Domain‑Driven Design aggregates by first explaining aggregates and aggregate roots, then showing Java class examples, followed by practical JPA/Hibernate integration challenges and a complete MongoDB document‑store solution, highlighting trade‑offs and best practices.
The article surveys thirty‑nine essential open‑source tools for constructing microservices—from API management, messaging, and monitoring to Kubernetes orchestration, programming languages, frameworks, and serverless platforms—highlighting how each solution supports communication, scalability, and rapid development across enterprise, government, education, and charitable applications.
This article explains how Spring Boot, Spring, and Spring MVC relate to each other, describes Spring MVC's core concepts, and details Spring Boot's auto‑configuration, static resource handling, error handling, CORS support, and related code examples for building Java backend applications.
This article walks through the Spring MVC internals, explaining how the @ResponseBody annotation triggers JSON serialization by tracing the DispatcherServlet, HandlerAdapters, and ReturnValueHandlers, and includes runnable Spring Boot test code to illustrate the processing flow.
This article provides a step‑by‑step guide to creating a Spring Boot application, generating a project template, adding a MyBatis‑based persistence layer, implementing service and controller layers, configuring the database, and running the application to expose REST endpoints.
Learn how to quickly wrap XML requests into objects and return XML responses in Spring Boot by leveraging the HttpMessageConverter mechanism, adding the Jackson XML message converter, defining POJOs with Jackson annotations, and creating controller endpoints that consume and produce XML.
This article explains the principles of cross-origin restrictions, analyzes various client‑side and server‑side solutions such as disabling browser security, using script tags, JSONP, and especially CORS with Spring Boot filters, annotations, and proxy configurations, providing complete code examples and practical deployment tips.
This article explains the difference between kill -9 and kill -15 signals, how Spring Boot processes the TERM signal, and provides practical code examples for implementing graceful shutdown, including shutdown hooks, DisposableBean, and proper thread‑pool termination strategies.
This tutorial explains how to build a WeChat QR‑code login system using Spring‑Boot, Thymeleaf, HttpClient and JSON, covering preparation steps, project configuration, OAuth2 flow, code examples for generating QR pages, handling callbacks, and customizing the login experience.
This article provides a comprehensive, question‑driven guide to Spring Boot, covering its differences from Spring and Spring MVC, auto‑configuration, starter projects, embedded servers, Maven plugins, DevTools, static resources, Spring Data, REST support, request mapping nuances, and profile‑based configuration for building production‑ready Java backend applications.
This article presents sixteen practical Spring Boot best‑practice recommendations—ranging from custom BOM dependency management and starter usage to clean controller design, service layering, externalized configuration, testing strategies, and logging—to help developers build maintainable, production‑grade Java micro‑services.
This article provides a comprehensive overview of Spring Cloud, explaining why it’s favored for microservice development, detailing its key features and toolset, and examining essential components such as Eureka, Hystrix, Config, Zuul, and Ribbon with practical insights.
This article compares two common Spring Cloud Config storage strategies—sharing a single Git repository with per‑project directories versus using a separate Git repository per project—detailing configuration properties, directory mapping, and the pros and cons of each approach.
This guide explains what CORS is, why browsers enforce same‑origin policies, and provides both frontend and backend strategies—including JSONP, proxy servers, Chrome flags, and several Spring Boot configurations such as filters, @CrossOrigin, custom CorsFilter, and WebMvcConfigurer—to resolve cross‑origin issues.
Spring Boot, introduced in 2013 to simplify Spring development, provides out‑of‑the‑box starter dependencies, reduces configuration and deployment complexity, and enables rapid creation of microservice‑ready Java applications, making it essential knowledge for modern backend developers.
This tutorial walks through creating a Spring Cloud Config Server that stores configuration data in a MySQL database, covering project setup, Maven dependencies, database schema creation with Flyway, Java bootstrap code, application properties configuration, and verification using curl commands to retrieve configuration values.
This article explains how to identify, design, and implement Java microservices—from domain‑driven modeling and service boundaries to RESTful API creation, documentation, proper HTTP verbs, and versioning strategies—using examples like an online retail store and the Game On! text adventure.
This guide shows how to change a Spring Boot project’s packaging to WAR, remove the embedded Tomcat, add the servlet‑api dependency, create a servlet initializer, build the WAR with Maven, and deploy it to an external Tomcat server for verification.
This article traces Spring's evolution, explains why Spring Boot was created to simplify configuration and deployment, outlines its core features, testing support, convention‑over‑configuration philosophy, and its relationship with Spring Cloud, providing a comprehensive guide for backend developers.
This article explains Spring Boot's core features, the role of @Conditional in automatic configuration, demonstrates custom condition classes and annotations, and walks through the source code of Spring Boot's auto‑configuration infrastructure, including @SpringBootApplication, EnableAutoConfigurationImportSelector, and class‑path condition evaluation.
This guide explains how to implement global rate limiting for high‑traffic Spring Boot applications by using Redis caches and MySQL storage, covering request interception, Redis key structures for limits and counters, and dynamic configuration for adding, updating, or deleting limits.
This article explores the origins of Spring Boot, its evolution from the Spring framework, key features, advantages for developers, and its relationship with Spring Cloud, illustrating how it simplifies Java backend development and addresses configuration complexity.
This article provides a detailed tutorial for creating a Spring Boot project with MyBatis, including environment setup, Maven dependencies, configuration files, database creation, MyBatis generator usage, and sample controller, service, and mapper code, enabling pagination with PageHelper and testing via HTTP requests.
This article shares a year‑long experience of adopting Spring Boot and Spring Cloud in a mid‑size Chinese company, explains microservice fundamentals, compares Spring Cloud with Dubbo, and provides practical guidance on service splitting, database handling, and migration strategies for building cloud‑native architectures.
This tutorial demonstrates how to quickly build a modern Java web application using Spring Boot, integrate MyBatis as the ORM, configure Redis as a second‑level cache, and write unit tests with H2, providing step‑by‑step code and configuration details for backend developers.
This guide explains practical methods to protect API data, covering HTTPS, request signing, SSL pinning, symmetric and asymmetric encryption, a Spring Boot starter for automatic request/response encryption, and JavaScript/Axios interceptors for client‑side encryption and decryption.
This article explains how to protect data exchanged between front‑end and back‑end services by using HTTPS, request signing, SSL pinning, and a Spring Boot starter that transparently encrypts/decrypts all API traffic with AES, complemented by JavaScript AES utilities and Axios interceptors for front‑end encryption.
This article explains why API security is crucial in front‑end/back‑end separated systems and provides practical measures—including HTTPS, request signing, SSL pinning, and full request/response AES encryption—along with a Spring Boot starter and JavaScript Axios interceptor to protect data in transit.
This article shares the practical experience, new features, component changes, migration steps, and pitfalls encountered while upgrading an old Spring Boot 1.x backend to Spring Boot 2.0, offering guidance for a smoother transition and highlighting post‑upgrade issues such as path matching, HTTP PUT handling, and Swagger compatibility.
This tutorial walks you through creating a reactive Spring WebFlux RESTful API using Spring Boot 2.0 and MongoDB, covering project setup, database connection, model, DAO, controller implementation, and testing the CRUD operations with practical code examples and screenshots.
This article introduces the fundamentals of message middleware, explains its key application scenarios such as asynchronous processing, system decoupling, flow control, and distributed transaction consistency, details the three transmission modes (point‑to‑point, publish/subscribe, request‑reply), and provides a step‑by‑step ActiveMQ quick‑start guide with Spring Boot integration and complete Java code examples.
This article walks through the evolution of Java web development, comparing the classic web.xml configuration with Servlet 3.0 annotations, Spring’s ServletContainerInitializer, and Spring Boot’s embedded‑container registration mechanisms, while exposing the underlying source code and initialization flow.
This article examines why large‑scale MySQL deployments encounter CPU, I/O and memory bottlenecks, compares vertical and horizontal data‑sharding strategies, evaluates open‑source middleware ShardingJdbc versus MyCat, and provides a detailed Spring Boot integration design with routing rules and practical use‑case examples.
This article compiles and translates key information about HikariCP, detailing why Spring Boot 2 adopts it as the default JDBC pool, comparing its performance and stability against BoneCP, C3P0, Tomcat and Druid, and providing practical configuration steps for quick integration.
This article explains why Spring Boot 2.0 replaced the Jedis Redis client with Lettuce, highlighting Lettuce’s netty‑based architecture, thread‑safe shared connections, asynchronous and reactive support, seamless Redis Sentinel and Cluster integration, SSL, streaming API, and provides code examples for both blocking and async usage.
This article explains how Spring Boot allows external configuration through various sources such as command‑line arguments, JNDI, system properties, environment variables, random values, property files, @PropertySource, and default properties, detailing their priority order and usage examples with code snippets.
This article introduces Spring Boot, explains its key features, walks through creating a Maven project with a complete pom.xml, adds essential dependencies and plugins, shows how to write a basic @RestController application, and demonstrates various ways to run and hot‑reload the service.
This guide explains how to raise Spring Boot code quality to near‑zero defects by writing comprehensive unit tests for Service, DAO, and Controller layers, integrating the Cobertura plugin for detailed coverage metrics, and automating the process with Jenkins for continuous integration.
This guide walks you through installing Spring Boot CLI on Windows, macOS, or Linux, verifying the installation, and quickly building a simple web application using a Groovy script, complete with command‑line examples and expected output.
This article explains why asynchronous @Async tasks using a custom ThreadPoolTaskScheduler can fail during application shutdown due to premature Redis connection pool destruction, and provides a step‑by‑step solution using Spring's shutdown configuration to wait for tasks to complete before closing resources.
This tutorial shows how to replace the default Spring Boot @Async executor with a custom ThreadPoolTaskExecutor, explains each pool parameter, demonstrates annotating async methods to use the pool, and provides a unit test that verifies the thread naming and execution behavior.
This step‑by‑step guide shows how to create a simple Spring Boot application, configure Gradle or Maven builds, write MockMvc tests, and use Spring REST Docs to automatically generate up‑to‑date API documentation snippets that can be included in Asciidoctor‑based docs.
This guide introduces the spring-boot-starter-mongodb-plus library, shows how to add it to a Spring Boot project, enables easy annotation-based activation, and provides a comprehensive list of configurable MongoDB connection properties with their default values for fine‑tuned backend performance.
This article provides a step‑by‑step guide to creating a Spring Boot project, explains core features such as embedded servlet containers and starters, demonstrates how to configure the main class, customize banners, manage properties, set up type‑safe beans, logging, and profile‑specific settings, all with runnable code examples.
When a Spring Cloud Feign client sends a request containing Java 8 date/time types like LocalDate, LocalTime, or LocalDateTime, the response may trigger JSON parse errors because Spring MVC serializes them as arrays, but Feign expects a proper object, which can be resolved by adding Jackson's JSR‑310 module and configuring the ObjectMapper.
This guide walks you through upgrading a Java application to Spring Boot 2.0, covering prerequisites, adding the properties‑migrator module, Maven and Gradle build changes, key configuration updates, actuator and security adjustments, and other important migration details.
This article explains the new ApplicationStartedEvent introduced in Spring Boot 2.0, shows the full event order, demonstrates how to write listeners for ApplicationPreparedEvent, ApplicationStartedEvent and ApplicationReadyEvent, and clarifies the difference between ApplicationStartedEvent and ApplicationReadyEvent using a CommandLineRunner example.
This article traces Spring’s evolution from its early IOC/AOP roots to the rise of Spring Boot, explains the key features of Spring Boot 2.0, outlines Java version and dependency requirements, and provides practical guidance for migrating existing Spring Boot 1.x projects to 2.0.
