This article explains why the legacy Date and SimpleDateFormat classes are problematic, introduces Java 8's immutable LocalDate, LocalTime, LocalDateTime and Instant classes, demonstrates thread‑safe creation, formatting, parsing, modification and calculation, and shows practical SpringBoot integration examples.
This article explains how Spring Boot launches an application by creating an AnnotationConfigApplicationContext, registering annotation processors, loading the primary source class, and invoking ConfigurationClassPostProcessor during the refresh phase, with detailed code examples illustrating each step.
When the recommendation service of the Mafengwo app experiences database disconnections, third‑party timeouts, or network jitter, a locally‑deployed off‑heap cache built with OHC and SpringBoot can return pre‑computed results, isolating business logic, reducing latency, and improving user experience during failures.
This article explains how to design and implement a high‑frequency like/unlike feature for large social platforms using Spring Cloud, Redis caching, MySQL persistence, and Quartz scheduled jobs, covering Redis setup, data modeling, service interfaces, database schema, and periodic data synchronization.
The article details the architecture, core objectives, and implementation of the Huajiao testing platform, describing how it lowers code barriers for testers, provides visual case management, integrates API and pressure testing, and outlines backend services built with Springboot, Mybatis, and related tooling.
This article walks through the Spring Boot startup sequence, detailing the roles of spring.factories, SpringApplication initialization, environment setup, ApplicationContext creation, and context refresh, while providing key code excerpts to illustrate each step.
This article demonstrates how to create a Spring Boot multi‑module Maven project, covering the setup of an aggregate parent pom, creation of sub‑modules, implementation of controller, service, repository, and entity layers, configuration files, packaging, and deployment steps.
This article explains how to optimize Spring Boot applications by adjusting configuration properties and JVM parameters, provides essential Tomcat settings, demonstrates practical tuning steps with and without IDE support, and details the meaning of common JVM flags for improved performance.
This article provides a comprehensive overview of common Spring Boot annotations—including core annotations, MVC‑related annotations, JPA mapping annotations, and global exception handling—along with example Java code illustrating their practical usage in backend development.
This guide walks you through creating a SpringBoot Eureka registration center in IntelliJ IDEA, launching it via the Run Dashboard with various configurations, and inspecting its Actuator monitoring endpoints, providing step‑by‑step instructions, screenshots, and essential code snippets.
This article explains the core concepts of SpringBoot, covering commonly used annotations, the application startup sequence, and the detailed mechanism of auto-configuration, including @SpringBootApplication, @EnableAutoConfiguration, @ConfigurationProperties, and how META-INF/spring.factories files drive automatic bean registration.
This article introduces seven open‑source Java projects that demonstrate front‑end/back‑end separation, explaining the architecture, providing repository links, and showing screenshots to help developers quickly adopt modern full‑stack development practices.
This article explains how to configure Logback in a Spring Boot project to write logs to separate files by level, enable asynchronous logging to reduce I/O latency, and demonstrates a performance test that shows a ten‑fold throughput increase compared with synchronous logging.
This article explains the inner workings of a Spring Boot application startup class, detailing the composite @SpringBootApplication annotation, the roles of @Configuration, @ComponentScan, and @EnableAutoConfiguration, and walks through the SpringApplication execution flow and the auto‑configuration mechanism powered by SpringFactoriesLoader.
This article introduces mall‑tiny, a lightweight SpringBoot backend skeleton that retains a full technology stack while simplifying business logic to core product and permission tables, and provides step‑by‑step setup, code structure, API conventions, and deployment instructions.
This article explains the lightweight features of the pure‑Java H2 embedded database, demonstrates its various modes—including in‑memory, file‑based, and standalone server—and provides step‑by‑step integration with SpringBoot and MyBatis for rapid development and testing.
This tutorial explains why cross‑origin requests fail in a SpringBoot application that uses SpringSecurity, demonstrates the problem with a sample mall project, and provides a complete solution by configuring a global CorsFilter and adjusting SpringSecurity to allow OPTIONS pre‑flight requests.
This article explains the fundamentals of Java SPI and JAR mechanisms, showing how to define and load service implementations, explore JAR metadata and commands, understand class‑loader hierarchies, Tomcat’s loader architecture, Spring Boot’s nested JAR handling, and how to create custom class loaders.
This article walks through using Alibaba Cloud's Cloud Toolkit IDE plugin to configure, package, and deploy a SpringBoot application from IntelliJ IDEA to any server, compares its workflow with native IDEA deployment, and evaluates its core features such as Deploy to Host, Deploy to ECS, file upload, remote terminal, and built‑in Arthas diagnostics.
This article explains how to implement database read‑write splitting in a Spring Boot application using ShardingSphere, covering the creation of master‑slave MySQL databases, Maven dependency setup, multi‑data‑source configuration, load‑balance algorithms, and handling replication lag with HintManager.
When the recommendation service experiences database disconnections, third‑party timeouts, or network jitter, we designed an off‑heap local disaster‑recovery cache using OHC and SpringBoot that isolates cache logic, writes asynchronously, backs up to disk, and restores availability, keeping latency under 10 ms and improving user experience.
Step‑by‑step tutorial showing how to set up MySQL, configure a SpringBoot project, add dependencies, use PageHelper for pagination, generate MyBatis code with MyBatis Generator, and implement CRUD REST APIs for product brands in a Java backend.
This guide compiles must‑read books and tutorials on Spring, Spring Boot, MyBatis, MySQL, Linux, Elasticsearch, MongoDB, Docker and related tools, helping developers quickly acquire the knowledge needed to build and deploy a complex e‑commerce mall application.
Spring Boot determines the main application class by creating a RuntimeException, inspecting its stack trace for a method named 'main', and loading the corresponding class via Class.forName, a process illustrated with source code and a JUnit test that compares printed stack traces to the thrown exception.
This article explains how Spring Boot determines the type of an application—NONE, SERVLET, or REACTIVE—by inspecting classpath indicator classes through the WebApplicationType enum, ClassUtils.isPresent, and forName methods, complete with code examples and step‑by‑step logic.
This article introduces the open‑source renren‑security permission management solution, detailing its architecture, core modules, and how to implement authentication and authorization with Apache Shiro in a SpringBoot‑MyBatis stack, including code examples for login, role‑based access, XSS/SQL filtering, and deployment options.
This article explains how Spring Boot’s automatically generated Application class serves as the entry point, details the @SpringBootApplication annotation and its composed annotations, and shows how to customize component scanning and disable unwanted auto‑configurations using @ComponentScan and @EnableAutoConfiguration with practical code examples.
Learn how to use MockMvc in Spring Boot to simulate HTTP requests, test controller logic without launching a server, and verify responses with concise code examples, covering dependency setup, controller creation, test class configuration, request execution, assertions, and common testing scenarios.
SpringBlade 2.0 is an open‑source, Spring‑Boot‑based backend framework that combines Spring Cloud, Mybatis, and a suite of tools such as BladeTool, Sentinel, Nacos, Traefik, Docker/K8s, and JWT, while offering front‑end projects Sword (React) and Saber (Vue) and detailed project structure, all under the Apache 2.0 license.
This article dives deep into SpringBoot’s inner workings, tracing a simple HelloWorld application from its main method through the startup call stack, FatJar packaging, custom ClassLoader behavior, and automatic controller registration via annotations, revealing why the framework feels both lightweight and monstrously complex.
This tutorial explains key concepts such as distributed systems, RPC, and Dubbo, then guides you through installing Zookeeper, creating Maven modules, configuring SpringBoot and Dubbo, implementing service interfaces, providers, and consumers, and testing a simple HelloWorld distributed service.
This article introduces CIM, a cross‑platform instant messaging framework, detailing its architecture, core components, registration and routing mechanisms, client‑server interaction, custom protocol, built‑in commands, and step‑by‑step deployment using SpringBoot, Netty, Redis and Zookeeper.
This article provides a step‑by‑step tutorial on using MyBatis3 annotation‑based CRUD, mapping, and provider annotations to replace XML configuration in a Spring Boot project, covering basic annotations, result mapping, dynamic SQL, Maven dependencies, configuration files, entity classes, database scripts, controller code, and testing procedures.
This article demonstrates practical SpringBoot techniques for masking external dependencies by mocking beans directly in the container and securing configuration values with Jasypt encryption, enabling local debugging without full service startup and protecting sensitive credentials.
This article shares practical SpringBoot techniques for locally mocking external service dependencies and encrypting configuration properties, detailing step-by-step bean replacement using PowerMockito, configuration encryption with Jasypt, and accompanying code examples for seamless development without starting full distributed services.
This guide explains what Sentry is, how its DSN works, and provides step‑by‑step instructions for adding the Raven dependency, configuring logback.xml, and using the Sentry SDK in a Spring Boot application to capture and forward error logs.
This tutorial walks through creating a lightweight Java web project using Maven, Spring, SpringMVC, MyBatis, and SpringBoot in IntelliJ IDEA, covering project setup, datasource configuration, Spring annotations, MyBatis integration, deployment settings, and optional Redis and Druid components.
The article describes an automated continuous‑integration framework for Xianyu’s iOS multi‑bundle projects that links Aone requirements to GitLab commits and Mojianlun builds via a SpringBoot/Vue platform, using webhook‑driven packaging, scoped testing, rate‑limited queues and statistics to reduce manual effort and errors.
This article introduces DBlog, a lightweight, responsive Java blog system built with SpringBoot and Bootstrap, outlines its module structure, technology stack, key features, and provides step‑by‑step instructions for setting up the development environment, configuring the database, and running the application.
This article introduces SolrCloud, explains its relationship with Lucene and Solr, provides environment setup instructions for a CentOS 7.3 cluster, details Maven dependencies, configuration files, and a comprehensive Java implementation using Spring Boot, including repository interfaces, utility classes, and extensive unit tests for adding, querying, and deleting documents.
This guide walks you through configuring Jenkins to build a SpringBoot Maven project, automating post‑build steps, managing the workspace, and securely transferring the resulting JAR to another server using SSH keys or an Expect script.
This tutorial explains how to add Swagger 2.0 API documentation to a Spring Boot application by configuring Maven dependencies, enabling Swagger with Springfox annotations, creating a Docket bean, and annotating controllers and model classes to generate an interactive API explorer.
