This article details NetEase Cloud Music's cross‑platform network library practice, describing the challenges of duplicated implementations, the design of a unified Cronet‑based solution, upgrade strategies, pitfalls, and real‑world performance gains of up to 40% when enabling QUIC.
This guide presents a detailed 2021 Java learning roadmap covering programming fundamentals, JVM internals, concurrency, data structures, algorithms, databases, development tools, backend frameworks, DevOps practices, and interview preparation, with curated resources and a practical study schedule to help learners secure a strong job offer.
This guide explains Spring MVC's request handling flow, detailing core components like DispatcherServlet, HandlerMapping, and HandlerAdapter, and demonstrates multiple controller definitions—including @RestController, HttpRequestHandler, Controller interface, and HttpServlet extensions—along with necessary configuration snippets.
This article explains why traditional SpringBoot CRUD endpoints require dozens of lines of code and how APIJSON lets you perform all create, read, update, delete, and statistical operations on any table with only a few lines of configuration and a single generic interface.
This tutorial shows how to quickly set up GraphQL in a Spring Boot web project by creating the project, adding Maven dependencies, defining schema files, implementing providers and resolvers, exposing a GraphQL endpoint, and testing query and mutation operations.
This article compares RabbitMQ and Kafka by explaining their architectures, queue consumption and production mechanisms, highlighting the master‑mirror design of RabbitMQ versus Kafka's partitioned approach, and summarizing their throughput characteristics to help engineers choose the appropriate messaging middleware for their needs.
This tutorial walks through converting a monolithic Spring application into a Spring Cloud microservice by implementing a JWT‑based OAuth2 resource server, covering required dependencies, custom JWT decoding, key separation, security filter configuration, and token parsing customization.
This article compares the four major API architectural styles—RPC, SOAP, REST, and GraphQL—detailing their mechanisms, advantages, drawbacks, and typical use cases, and guides developers on selecting the most suitable approach based on project requirements, performance, and ecosystem considerations.
This article explains server‑side network concurrency models, the fundamentals of streams and I/O operations, compares blocking and non‑blocking approaches, and details practical solutions such as multithreading, busy‑polling, select and epoll with code examples and performance analysis.
The article introduces Spring’s open‑source nohttp project, which scans, replaces, and blocks HTTP URLs to prevent man‑in‑the‑middle attacks, outlines its modules and usage with an XML configuration example, and also advertises a free Alibaba Cloud server giveaway and a large interview‑question PDF collection.
Apache Dubbo 3.0.4, a high‑performance lightweight Java RPC framework, introduces several new capabilities such as logger disabling, background module startup, multi‑subscription extensions, native Dubbo 3.0.4 support, streamObserver cancellation, message compression, cache attributes, Maven plugin integration, and adds ExtensionClassLoaderPackages, while also fixing numerous bugs, optimizing code paths, and enhancing overall stability.
This article explains how to place parameter validation in the appropriate layer, introduces Hibernate Validator with Maven dependencies and common annotations, provides a validated entity example, shows controller usage with @Valid/@Validated, and demonstrates useful Commons‑Lang3 utilities for string and collection checks.
This comprehensive guide explains Java naming standards for packages, classes, interfaces, abstract classes, exceptions, methods, variables, constants, enums, generics, and test code, providing clear rules, examples, and best‑practice code snippets to help developers write clean, maintainable code.
This article explores the key challenges of designing a flash‑sale (秒杀) system—such as overselling, massive concurrent traffic, bot abuse, URL exposure, and database bottlenecks—and presents a comprehensive backend architecture with Redis clustering, Nginx load balancing, dynamic URLs, rate‑limiting, asynchronous order processing, and service degradation strategies.
This article explains how to design a QR‑code login flow using a MySQL table, defines the involved roles, outlines required REST and WebSocket interfaces, and provides complete Spring Boot backend and JavaScript frontend code examples for generating QR codes, validating tokens, and notifying the client in real time.
This article shares a comprehensive guide to building robust logging systems for Node.js backend services, covering log types, storage options, performance considerations, full‑trace design, custom field schemas, integration with cloud log platforms, and practical troubleshooting examples.
This guide walks you through setting up a Spring Boot‑based logistics warehouse system, detailing required software versions, the project’s modular features, technology stack, database and backend configuration, frontend setup with Vue, and provides screenshots of key interfaces.
This article walks through creating a Spring Boot project, adding GraphQL dependencies, defining schema files, implementing resolvers and a controller, and testing queries and mutations, providing a quick and flexible way to integrate GraphQL into a Java backend.
Spring Boot 2.5.6, released on October 21, introduces 43 bug fixes, documentation improvements, and numerous dependency upgrades—including Dropwizard Metrics, Ehcache3, HttpCore5, MySQL, and Spring Framework 5.3.12—addressing issues such as R2DBC‑JDBC conflicts, JMX endpoint availability, and memory pressure from caching.
The article explains the PHP function apache_getenv, which retrieves the value of a specified Apache environment variable, describes its required Apache 2 context, details its parameters $variable and optional $walk_to_top, outlines the return value, and provides a usage example.
This article explains how to extend the Spring IoC container using custom BeanPostProcessor, BeanFactoryPostProcessor, and FactoryBean implementations, covering registration methods, ordering, interaction with AOP proxies, and practical code examples for tracing bean creation and externalizing configuration properties.
This article explains the core differences between Spring's BeanFactory and ApplicationContext, why ApplicationContext is generally preferred, and how to manually register BeanPostProcessors when using a plain DefaultListableBeanFactory.
The article documents the PHP function apache_get_version, explaining that it returns the Apache server version string or FALSE on failure, lists that it takes no parameters, describes its return values, and provides a complete PHP example demonstrating its usage.
Effective MySQL sharding requires sustainable, low‑skew designs, favoring hash‑based methods with proper coprime counts, two‑stage partitioning, routing tables, or consistent hashing, while supporting expansion via doubling or flexible consistent‑hash growth to avoid hot spots and uneven data distribution.
This article explains the difference between synchronous and asynchronous method calls in Java, demonstrates a simple Spring Boot Task class with three time‑consuming methods, shows how to convert them to asynchronous execution using @Async and @EnableAsync, and illustrates how to coordinate completion with Future objects.
This article explains the fundamentals of I/O, details how sockets are created, bound, listened to, and accepted, describes the client-side connect process, and clarifies why read, write, accept, and connect operations can block, laying the groundwork for deeper Netty studies.
This article documents a Python service performance optimization case, detailing the initial requirements, environment setup, bottleneck analysis, architectural redesign with caching and message queues, Linux TCP time-wait tuning, and load-testing results that achieved 50 k QPS with low latency and error rate.
This article explains the motivations behind Spring WebFlux, introduces reactive programming concepts, compares annotated controllers with functional endpoints, discusses when to choose WebFlux over Spring MVC, and provides complete code examples for building a reactive CRUD service with Spring Boot.
This article presents a Boshi Fund case study showing how RocketMQ’s decoupling, topic/tag best practices, and transactional messaging streamline multi‑system financial customer‑accompaniment, enhance operational efficiency, and enable reliable distributed transactions in online fund‑purchase scenarios.
This guide walks you through downloading the Go binary, extracting it to /usr/local, verifying the installation, and setting up essential environment variables like GOROOT and GOPATH so you can run Go commands directly from the terminal.
This article introduces ten Alibaba open‑source projects—including Druid, fastjson, Dubbo, RocketMQ, Arthas, Nacos, EasyExcel, Sentinel, Otter, P3C and Spring Cloud Alibaba—detailing their key features, advantages, usage scenarios, and Maven dependency configurations to help developers quickly adopt them in backend systems.
This article explains how to build traffic‑ratio models for GET APIs, scale them, and implement a random‑selection framework in Java/Groovy to quantitatively simulate real‑world request loads for both individual endpoints and whole services.
This guide explains how to use Spring Boot's @GetMapping attributes to restrict requests by content type, parameters, and headers, compares PathPattern and AntPathMatcher URI patterns, and demonstrates dynamic registration of request handlers through programmatic mapping configuration.
This guide explores sixteen practical Redis use cases—from caching and distributed locks to rate limiting, bitmaps, shopping carts, timelines, and ranking—detailing data types, commands, and implementation tips that help developers build efficient, scalable backend services.
The article examines how varied naming conventions and outdated coding practices in Java backend projects cause confusion, illustrates the problem with real code examples, and provides concrete refactoring steps—such as adopting Java 8 date‑time APIs and enforcing consistent service naming—to improve maintainability and team cohesion.
This article explains how Tencent Cloud MongoDB improves the maxTimeMS server-side timeout feature to prevent request backlog and service avalanche, covering native MongoDB limitations, optimizations in mongos write command support, and default configuration implementation.
This guide walks you through upgrading to Alipay’s new transfer interface alipay.fund.trans.uni.transfer, updating the SDK to version 4.10.97, configuring certificates, adding Maven dependencies, creating configuration beans, and implementing utility classes for secure fund transfers in a Spring Boot application.
This article explains theoretical formulas and practical guidelines for calculating the optimal thread pool size in Java, covering CPU‑bound and I/O‑bound workloads, how to measure CPU cores and blocking ratios, and provides example calculations and code snippets.
This tutorial walks through preparing a functional Spring Boot JAR, converting it to an EXE with exe4j, bundling a local JRE, and creating a single‑click installer using Inno Setup, enabling non‑technical users to install and run the application without a separate Java environment.
This article presents a comprehensive collection of Java code optimization techniques—from using final modifiers and reusing objects to pre‑sizing collections and avoiding reflection—aimed at reducing code size, improving execution efficiency, and preventing common performance pitfalls in backend development.
The Baidu Search Closed‑Door Technical Symposium, the first core technical forum hosted by Baidu’s Search Architecture Department, brings senior engineers and junior backend developers together to discuss semantic retrieval, data‑driven big‑data processing, and vertical search offline architecture, while offering limited‑capacity sessions, networking gifts, and travel subsidies.
This article explains how Spring Boot registers custom error pages with its embedded Tomcat container, covering default HTML/JSON error responses, the underlying auto‑configuration classes, BeanPostProcessor registration, and the BasicErrorController that serves the default /error endpoint.
This article explains the architecture of a microservice‑centric API gateway, covering its overall placement, request dispatch, conditional routing, API management, rate‑limiting, circuit‑breaking, security policies, monitoring, tracing, and future improvement directions.
This article explains the difference between synchronous and asynchronous method calls in Spring Boot, demonstrates how to convert simple task methods to asynchronous ones using @Async, shows how to coordinate multiple async tasks with CompletableFuture, and provides complete code examples and test results.
This article demonstrates how to use Fluent MyBatis to build complex SQL queries for a student_score table, compares the implementation with native MyBatis XML and MyBatis‑Plus, and discusses code generation settings and practical trade‑offs, providing full code examples and performance insights.
Microservice architecture introduces complexity, but using scaffolding tools such as Spring Boot and Spring Data lets developers focus on business logic by providing reusable components, reducing duplication, and simplifying data access, while avoiding the pitfalls of building custom persistence layers from scratch.
This article dives deep into the Linux kernel implementation of the TCP three‑way handshake, explaining the roles of listen, connect, SYN/ACK processing, queue management, timers, and accept, while providing concrete code snippets and diagrams to help backend engineers master the underlying mechanics.
This article provides a comprehensive overview of Spring WebFlux, covering its reactive fundamentals, key components, auto‑configuration process, functional endpoints, request handling flow, performance benchmarks against Spring MVC, and recommended reactive data stores for high‑concurrency applications.
Learn how Maven’s dependency resolution can cause jar conflicts, recognize common runtime errors like ClassNotFoundException, and use IDE tools, Maven commands, parent POM management, exclusion and version locking techniques to identify and eliminate conflicting jars in Java backend projects.
This article explains how Spring implements classic design patterns—including Simple Factory via BeanFactory, Factory Method with FactoryBean, Singleton with double‑checked locking, Adapter through HandlerAdapter, Decorator via Wrapper classes, Observer in its event model, Strategy via the Resource interface, and Template Method in JdbcTemplate—providing clear examples and code snippets for each.
This article explains how Spring MVC evolved from basic Servlets to a front‑controller architecture, detailing the roles of DispatcherServlet, HandlerMapping, HandlerInterceptor, ModelAndView, and ViewResolver in streamlining request handling, business logic separation, and view rendering for modern Java web applications.
This article explores the most common Redis locking mechanisms—SetNX, RedLock, and Redisson—detailing their principles, pitfalls, and implementation nuances, including code examples, Lua scripts for atomic unlocks, and best‑practice recommendations for building reliable distributed locks in backend systems.
This article explains how Redis locking works by detailing the setnx command, its modern usage with the SET command and PX expiration, common pitfalls, safe unlocking with unique values and Lua scripts, and introduces Redisson's lock implementations and the RedLock algorithm for distributed environments.
Node.js offers unparalleled advantages for real‑time application development—including single‑language JavaScript, cost‑effectiveness, modular architecture, event‑driven non‑blocking I/O, rapid development, SEO friendliness, and easy scalability—making it the preferred framework for live video, IoT, notifications, and instant messaging solutions.
This article walks you through using Scrapy to fetch price data from Beijing Xinfadi's website, covering request analysis, spider creation, item definition, pagination, data extraction, pipeline setup, and exporting results to CSV with full code examples.
This article explains why upgrading from Java 8 to the LTS Java 17 is essential, outlines the changes and deprecations you’ll encounter, and provides step‑by‑step instructions—including multi‑release JARs, code examples, and tooling tips—to smoothly migrate your applications.
This tutorial demonstrates how to use Go's standard and third‑party libraries to parse and generate YAML, JSON, and XML files, covering data structures, unmarshalling, marshalling, handling maps, and producing readable output with code examples.
This tutorial demonstrates how to leverage Spring AOP in a Spring Boot project to automatically fill common audit columns such as creator, creation time, updater, and update time for database tables, eliminating repetitive manual SQL handling and centralizing logging logic.
This article explains how to design robust Java backend APIs, covering interface definition, request/response formats, error handling, token generation, digital signing, interceptor chains, rate limiting, HTTPS migration, and strategies for high concurrency and high availability such as load balancing, clustering and caching.
This article walks through Java 17’s lesser‑known enhancements—including the “B” pattern for time‑of‑day formatting, the concise Stream.toList() method, the versatile mapMulti() operation with practical examples, and the new HexFormat utility for hex conversions—while highlighting related bug fixes and usage tips.
This article examines the concept of delayed tasks versus scheduled tasks, outlines their differences, and presents five practical implementation strategies—including database polling with Quartz, JDK DelayQueue, Netty’s HashedWheelTimer, Redis ZSET and keyspace notifications, and RabbitMQ delayed queues—complete with code samples, performance pros and cons, and scalability considerations.
This article explains the two primary use cases of ThreadLocal in Java—providing each thread with its own exclusive object and sharing request‑scoped data across methods—while covering implementation details, memory‑leak risks, and best‑practice cleanup techniques.
This article dissects MyBatis' internal workflow, explaining how mapper interfaces are bound to XML files, detailing the step‑by‑step SQL execution process, and showing how to create custom typeHandlers for parameter and result mapping, all illustrated with diagrams and code examples.
This article explains how to structure Python applications for seamless configuration across development, testing, and production environments using packages, __init__.py files, environment variables, and dynamic imports, providing practical code examples and a real‑world project layout.
Spring Boot 2.5.5, released on September 23, introduces 41 bug fixes, numerous documentation improvements, and a comprehensive set of dependency upgrades—including updates to Ehcache3, Kotlin, Netty, and Spring Framework—providing developers with enhanced stability, performance, and compatibility across the ecosystem.
This article introduces the ABP vNext framework, explains its origins from ASP.NET Boilerplate, details its modular, DDD‑based architecture and microservice capabilities, and provides a complete hands‑on tutorial—including CLI commands, project structure, code snippets, and best‑practice recommendations—for creating a .NET microservice solution.
This article provides a comprehensive overview of microservices architecture, contrasting it with monolithic systems, detailing its principles, advantages, disadvantages, communication patterns, governance, containerization, DevOps impact, and real‑world case studies, while offering practical considerations for adoption.
This article explains how Netty abstracts Java NIO's event registration by using SelectionKey interestOps, detailing the registration of OP_ACCEPT and OP_READ events, the underlying doRegister and doBeginRead implementations, and the flow of events through the Netty pipeline with illustrative code snippets.
JavaBeans are Java classes that follow a standard interface with constructors, getters, and setters, supporting simple, indexed, bound, and constrained property types, and are used in JSP via the jsp:useBean and jsp:getProperty/jsp:setProperty tags to encapsulate components, manage scopes, and enable event‑driven property change notifications.
This article provides a comprehensive overview of Dubbo, the high‑performance Java RPC framework, covering its core components, advantages over alternatives, supported protocols, configuration methods, startup behavior, integration with Spring Boot, and detailed architecture for building scalable distributed services.
This article introduces JustAuth, a lightweight open‑source Java library that streamlines third‑party social logins by supporting dozens of platforms, explains its benefits for users and developers, and provides step‑by‑step Maven setup, HTTP client selection, and code examples for basic, builder‑pattern, and custom authentication flows.
Java 17, the newest LTS release, brings a free Oracle JDK under a permissive license and upcoming Spring Framework 6 and Spring Boot 3 support, prompting developers to consider a rapid migration to the modern Java ecosystem.
This guide demonstrates how to set up Spring Boot 2.3.12 with Elasticsearch 7.8, configure separate JPA and Elasticsearch repositories, and implement two batch insertion methods—using ElasticsearchRestTemplate and repository saveAll—while measuring performance, showing comparable execution times for inserting 10,000 records.
This article introduces a collection of essential Java utility libraries—including core Java methods, Apache Commons, Commons BeanUtils, Commons IO, and Google Guava—explaining their key features, Maven dependencies, and practical code snippets for tasks such as string handling, collection operations, object mapping, file I/O, and advanced data structures.
This article traces the historical development from early wired telephones to modern mobile and internet voice services, then details the architecture, features, SIP protocol handling, and Java‑FreeSWITCH integration of the YTalk call platform used for outbound and inbound communications.
This article shares practical experiences and advice on learning software development by copying code, covering where to find source code, official documentation, exemplary implementations, and search engines, and illustrates the approach with real‑world examples from the FunTester testing framework.
This article provides a comprehensive guide to using Spring Boot Actuator for microservice monitoring, covering its purpose, quick setup with Maven/Gradle, detailed explanations of key endpoints such as /health, /metrics, /loggers, and integration with Spring Security for secure access.
This article explains the concept of delayed tasks, compares them with scheduled tasks, and presents five practical implementation strategies—including database polling with Quartz, JDK DelayQueue, Netty's time‑wheel algorithm, Redis sorted‑set and keyspace notifications, and RabbitMQ delayed queues—complete with code samples, advantages, and drawbacks.
The article explains how to protect a flash‑sale inventory using Redis locks in a Spring Boot service, starting with a simple synchronized lock, moving to distributed locks with setIfAbsent, handling lock expiration issues, extending TTL, and finally simplifying the implementation with Redisson.
The SpringOne conference highlighted the upcoming Spring Framework 6.0, detailing its Java 17 and Jakarta EE 9 foundation, roadmap milestones, key migration points, Spring Boot 3 integration, and the imminent Java 17 release, offering developers a clear view of the next decade of Spring development.
The article explains Spring's warning against field injection, compares constructor, setter, and field injection methods with code examples, discusses the drawbacks of field injection such as final‑field incompatibility and hidden dependencies, and recommends using constructor or setter injection for safer, more maintainable code.
This guide explains how to implement periodic tasks in Spring Boot 2.2.11 using the built‑in @EnableScheduling/@Scheduled approach and the Quartz library, covering configuration, cron expressions, core Quartz concepts, and complete code examples for both methods.
This article demonstrates how to construct a full‑text site search solution by selecting Elasticsearch as the search engine, Spring Boot for the backend service, and the IK analyzer for Chinese tokenization, covering environment setup, project architecture, key code implementations, UI pages, and a concise conclusion on the effectiveness of the approach.
This guide explains how to use Maven's archetype plugin to create, customize, install, and share project templates, enabling rapid initialization of new Java projects while excluding unwanted files, and shows both command‑line and IntelliJ IDEA integration for consistent backend development.
This article explains how to use IntelliJ IDEA's Live Template feature to create shortcuts for common Java Stream collector operations such as toList, toSet, joining, and groupingBy, improving code readability and productivity when migrating large codebases to the Stream API.
This article explains the importance of logging in Java web applications, compares popular logging frameworks, introduces the concept of a logging facade, and shows why using SLF4J as a facade provides better decoupling, flexibility, and performance for backend developers.
This article explains how SpringBoot injects HttpServletRequest into controllers using a JDK dynamic proxy and ThreadLocal storage, tracing the request object from the ObjectFactoryDelegatingInvocationHandler through RequestObjectFactory, RequestContextHolder, and the FrameworkServlet's processRequest lifecycle.
This article lists the most popular Java utility classes and their frequently used methods, derived from analysis of 50,000 GitHub projects, helping developers quickly find ready‑made functionality and understand common usage patterns.
The article explains the concept of software scaffolding, why it is needed for microservice development, outlines key design principles, shares a real‑world case of replacing a custom persistence layer with Spring Data, and reviews popular scaffolding tools such as Vue CLI, Maven, Netty, Java EE, Dropwizard and Spring Boot.
This article provides a comprehensive overview of Spring IoC circular dependency problems, explains the three types of circular dependencies, demonstrates them with Java and XML code, and details how Spring resolves singleton setter‑based cycles using its three‑level cache mechanism.
This article provides a comprehensive guide to Java naming conventions, covering package naming, class and interface naming, abstract and exception classes, method and variable naming, constant and enum standards, as well as best‑practice examples and code snippets for each rule.
This roundup covers the Electron 14.0.0 release with new eight‑week cadence and expanded support, StackBlitz's quick Nuxt.js creation, notable open‑source libraries like react‑native‑elements and 7guis‑React‑TypeScript‑MobX, plus deep dives into NestJS practices, React Native's new architecture, Recoil state management, and a comparison of Object versus Map in JavaScript.
JDK 17, the next long‑term support release of Java, entered its final release‑candidate phase with build 35 and brings a host of enhancements—including stricter floating‑point semantics, sealed classes, pattern‑matching for switch, a new RandomGenerator API, and a modern Metal‑based rendering pipeline—while deprecating legacy APIs such as the Security Manager and Applet.
This tutorial explains how to crawl thousands of images from Sogou using Java, detailing the request URL analysis, parameter extraction, multithreaded downloading logic, and providing complete source code for the image processor, pipeline, and HTTP utility classes.
This article compares delayed and scheduled tasks, explains their differences, and presents five practical Java implementations—including database polling with Quartz, JDK DelayQueue, Netty's HashedWheelTimer, Redis sorted sets, and RabbitMQ—highlighting each method's advantages and drawbacks.
This article explains Spring Boot's default logging setup using SLF4J and Logback, demonstrates how to view log levels in a test class, shows how to modify log levels via application properties, and details the underlying XML configuration files and how to customize them for different environments.
The SpringOne conference went online and revealed the upcoming Spring Framework 6.0 built on Java 17 and Jakarta EE 9, outlining its development milestones, key changes from 5.3, cloud‑native enhancements, Spring Boot 3 integration, and the imminent release of Java 17 that will usher in a new era for Java developers.
This article explains how Domain‑Driven Design (DDD) gained popularity alongside microservices, outlines the evolution of software architectures, highlights the boundary‑defining problems of microservices, and shows how DDD’s strategic and tactical design methods help create clear, high‑cohesion, low‑coupling systems.
This article introduces six popular open‑source Spring Cloud microservice projects, detailing their core features, technology stacks, and providing repository links and screenshots to help developers quickly study and adopt enterprise‑grade microservice architectures.
This article explains the role of Spring's MergedBeanDefinitionPostProcessor, showing how it merges bean definitions, invokes post‑processors during bean creation, and enables @Autowired‑related dependency injection with code examples and detailed workflow steps.
