This article provides a step‑by‑step guide on integrating Spring Batch with Spring Boot, covering configuration, job and step setup, ItemReader/Processor/Writer implementations, database interactions, handling CSV and database sources, and troubleshooting common issues such as connection‑pool compatibility.
This article introduces a Java‑based private cinema reservation system built on Spring Boot and MyBatis, outlines its core technologies, provides step‑by‑step deployment instructions, and details all functional URLs and the source‑code download method.
This article introduces MyBatis‑Flex, a lightweight yet powerful MyBatis enhancement framework, outlines its key features and advantages, compares it with similar tools, presents performance benchmarks, lists supported databases, and provides a step‑by‑step quick‑start tutorial with code examples for Spring Boot integration.
This article explains the purpose of an API gateway, introduces Spring Cloud Gateway as a modern, WebFlux‑based solution, outlines its features, core concepts such as routes, predicates and filters, shows configuration examples, dynamic routing, and how to create custom predicates and filters for microservice architectures.
This article compares Nacos 2.0's encryption plugin with the Jasypt library for securely storing passwords and secret keys in configuration files, providing step‑by‑step Maven dependencies, configuration examples, encryption/decryption code, and practical advice for Spring Boot applications.
This article provides a comprehensive tutorial on integrating Dataway—a zero‑code API configuration tool based on DataQL—into a Spring Boot project via the Hasor framework, covering dependency setup, Dataway configuration, datasource binding, enabling Hasor, launching the application, and creating and testing API endpoints.
This article introduces MyBatis-Flex, a lightweight high‑performance MyBatis enhancement framework, outlines its key features, compares it with MyBatis‑Plus and Fluent‑MyBatis, lists supported databases, and provides a step‑by‑step quick‑start tutorial with code examples.
This guide walks through setting up a Spring Boot Admin server and client, adding security, configuring logging, displaying client IPs, and dynamically adjusting log levels via the SBA UI, providing complete Maven dependencies, Java configuration classes, and YAML settings for a secure, observable Spring Boot ecosystem.
This guide walks through setting up Seata's configuration and registry centers using Nacos, creating the required config files, initializing the database, and implementing account and storage services in a Spring Boot micro‑service project, complete with code samples and verification steps.
This tutorial explains how to use MyBatis interceptor mechanisms to dynamically modify SQL statements at runtime in a Spring Boot application, covering interceptor types, implementation steps, configuration, core code, testing, and common use cases such as SQL monitoring, pagination, and data permission filtering.
When upgrading Spring Boot to patch CVE‑2023‑34034 and CVE‑2023‑34035, applications using Spring Security may encounter a startup error indicating ambiguous pattern detection, which can be resolved by upgrading to patched versions and adjusting requestMatchers to use MvcRequestMatcher or AntPathRequestMatcher as appropriate.
This guide explains how to achieve reliable message consistency in a Spring Boot 2.3.9 application using RocketMQ 4.8.0 by outlining the transactional message flow, broker handling, project structure, code implementation, and testing procedures.
This article explains how to achieve graceful service publishing using Nacos as a registration center in a Spring Boot microservice architecture, covering environment setup, provider startup and shutdown, client-side load‑balancing with Ribbon, and configuration tweaks for both online and offline scenarios.
Spring Startup Analyzer is an open-source tool that captures Spring Boot startup data, generates interactive reports, and offers async bean initialization to speed up launches, with detailed statistics, bean timelines, method call metrics, unused JAR detection, and flame-graph visualizations, plus step-by-step usage instructions.
Spring Boot 3.1.2, released on July 20, 2023, upgrades to Spring Framework 6.0.6, adds Java 19 support, enhances Devtools, Micrometer metrics, REST Docs, and fixes several bugs including MongoDB test failures and Actuator metrics issues, requiring Java 17+.
This article explains how to design and implement a microservice permission system using Apache Shiro, Spring Boot, Dubbo, and Redis, covering challenges of integrating Shiro with gateways, shared session management, custom Cache and SessionDAO implementations, and provides complete code examples and configuration details.
This article provides an in‑depth overview of the Caffeine local cache library for Java, covering its concepts, configuration options, loading strategies, eviction policies, asynchronous usage, statistics collection, and step‑by‑step integration with Spring Boot including annotations and practical code examples.
The article explains how to achieve graceful shutdown of Spring Boot services by handling Linux signals, registering JVM shutdown hooks, using Spring's ContextClosedEvent and Actuator endpoint, and provides practical code examples for safely terminating thread pools, sockets, and other resources.
This guide walks through designing a User_Token table, defining roles and APIs, implementing QR‑code generation and validation endpoints, and wiring a Spring Boot WebSocket server with front‑end AJAX to achieve secure, real‑time QR‑code login for Android, web and PC clients.
This article demonstrates how to leverage MyBatis interceptor mechanism in a Spring Boot 3 application to dynamically modify SQL statements, showing step‑by‑step implementation, configuration, core code, testing, and common use cases such as SQL monitoring, pagination, and data permission filtering.
This article explains how Java's dynamic compilation can be applied to modularize and simplify code management in large projects, demonstrates a basic implementation with code examples, and shows how to integrate the technique into Spring Boot applications while addressing class‑loader and dependency challenges.
WeBlog is a front‑end/back‑end separated blogging platform built with Spring Boot, MyBatis‑Plus, MySQL, Spring Security, JWT, Minio, and Vue 3.2 + Element Plus, offering Markdown editing, category/tag management, dashboard statistics, and a complete set of admin and front‑end features.
This article introduces the smart-servlet web container, outlines its key features, provides step‑by‑step instructions for replacing Tomcat with smart-servlet in a Spring Boot fat‑jar project, and highlights the related smart-socket framework and ecosystem components.
The article explains how to perform a graceful shutdown of Spring Boot applications by handling Linux kill signals, using the JVM's SignalHandler and Runtime.addShutdownHook mechanisms, and leveraging Spring's ContextClosedEvent and the actuator shutdown endpoint, with detailed code examples and configuration tips.
This article outlines the design goals, architecture, and implementation details of a high‑performance distributed caching solution for Spring Boot applications, combining Redis as a first‑level cache with Caffeine as a second‑level cache, and provides configuration, usage examples, and future enhancement plans.
This article explains the dangers of using the Linux kill -9 command on Spring Boot applications, illustrates data loss scenarios, and provides multiple graceful shutdown methods—including SIGTERM, Spring's ConfigurableApplicationContext, Actuator endpoints, and custom Tomcat shutdown configurations—complete with code examples and best‑practice tips.
This article explains how MyBatis implements first‑level (session) and second‑level (cross‑session) caches, the conditions required for each to work, why the first‑level cache often fails in Spring Boot without transactions, how to enable and use the second‑level cache safely, and the hidden risks of stale data when different mappers share related tables.
This article explains how to invoke external services from a Spring Boot application using three approaches—raw HttpClient requests, Spring's RestTemplate utilities, and Feign clients—providing code examples, configuration steps, and tips for handling headers and tokens.
This guide walks through the technology stack, system design, UI screenshots, attendance rules, and step‑by‑step setup for a full‑stack HR management application built with Vue, ElementUI, and Spring Boot, enabling admins and employees to manage leave, salary, and attendance.
This article explains Project Loom’s virtual threads, shows how to enable them in a Spring Boot 3.1 application with Java 20, provides code samples and performance test results that demonstrate dramatically higher throughput under high concurrency.
This article introduces the most useful Spring Boot utility classes—including Assert, ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, and AOP helpers—explaining their purpose, key methods, and code examples to help Java developers write cleaner, more efficient backend code.
This guide demonstrates how to integrate Spring Boot 2.3.10 with Elasticsearch 7.8 using the high‑level REST client, covering required Maven dependencies, index creation, retrieval, deletion, document CRUD operations, bulk processing, and a variety of advanced search techniques such as paging, sorting, filtering, range, highlighting, aggregations, and grouping.
This tutorial walks through the fundamentals and architecture of ShardingSphere, compares it with other sharding tools, and demonstrates how to implement database sharding in a Spring Boot project using both YML configuration and pure Java code, including detailed code snippets and deployment tips.
This article explains how to integrate IP geolocation into a Spring Boot application by using the ip2region library for offline lookups and an online API for real‑time address resolution, providing code samples, dependency setup, caching strategies, and an interceptor to attach IP information to every request.
This tutorial explains how to deploy a single‑node Pulsar cluster with Docker, configure the Java client in a Spring Boot application, and create producers and consumers with detailed code examples and parameter explanations.
This guide demonstrates how to integrate Spring Boot 2.3.10 with Elasticsearch 7.8, covering Maven dependencies, application configuration, data model annotations, repository interfaces, custom query methods, and comprehensive JUnit tests using both repository and ElasticsearchRestTemplate approaches.
This article walks through selecting Camunda 7 as a workflow engine, explains core concepts and components, shows how to integrate it into a Spring Boot project with Maven dependencies, configure the database, deploy BPMN models, and use the rich API for processes, tasks, variables, listeners, and gateways.
This article explains why rate limiting is critical for microservice architectures, reviews common limiting algorithms, and provides step‑by‑step implementations using Dubbo, Spring Cloud, Guava token‑bucket, Sentinel, Redis+Lua, and a reusable Spring Boot starter with custom annotations and AOP.
kkFileView is an open‑source Spring Boot‑based service that enables online preview of a wide range of document, image, archive and multimedia formats, offering multiple rendering modes and easy REST integration for developers.
This article explains the concept of plugin‑based development, outlines its benefits, compares common implementation methods such as Java SPI, custom configuration, and Spring Boot factories, and provides step‑by‑step code examples for building extensible backend services.
This article explains the purpose, differences, and proper usage of Spring validation annotations such as @NotNull, @NotBlank, @NotEmpty, as well as the @Valid and @Validated triggers, providing Maven dependency setup and concrete code examples for effective backend data validation.
This article explains how to integrate the Camunda 7 workflow engine into a Spring Boot project, covering core concepts, required Maven dependencies, configuration files, database schema, process modeling, task types, and detailed API examples for managing processes, tasks, variables, listeners, and permissions.
This guide explains how to integrate the ip2region library for offline IP‑to‑region lookups, implement memory‑accelerated queries, use an online WHOIS service for richer data, and embed the logic into a Spring Boot interceptor for seamless request handling.
This article reviews the latest Mica releases, highlighting version compatibility with Spring Boot, new Redis and XSS features, core utility enhancements, bug fixes, and upcoming support for Spring Boot 3.1.x, providing developers with a concise overview of the library’s recent advancements.
This article explains how to integrate the Camunda 7 workflow engine into a Spring Boot project, covering core concepts, required Maven dependencies, configuration files, database schema, process modeling, task types, gateways, and detailed API examples for process and task management.
This article explains the dangers of using the Linux kill -9 command on Java services, especially Spring Boot applications, and demonstrates several graceful shutdown techniques—including using SIGTERM, Tomcat's shutdown hooks, Spring Actuator, and custom shutdown configurations—to avoid data loss and ensure clean termination.
This article demonstrates multiple ways to add text or image watermarks to PDF documents within a Spring Boot application, covering Apache PDFBox, iText, Ghostscript, Free Spire.PDF, and Aspose.PDF, and provides complete Maven dependencies and code examples for each method.
This article explains the fundamentals of Spring WebFlux, its reactive programming model with Mono and Flux, compares it to Spring MVC, and provides practical code examples for building non‑blocking backend services using Spring Boot.
This tutorial provides a complete, step‑by‑step guide to set up a one‑click automated deployment pipeline for a Spring Boot application using Docker, Jenkins, Maven, and shell scripts on a CentOS 7 host, covering installation, configuration, job creation, testing, and execution.
This article demonstrates three practical approaches—native HttpClient, Spring's RestTemplate, and Feign client—to invoke external services from a Spring Boot application, providing code examples, configuration details, and tips for handling authentication tokens.
Learn how Project Loom’s virtual threads can replace heavyweight OS threads in Java Spring Boot applications, enabling one‑thread‑per‑request models, improving throughput under high concurrency, with step‑by‑step setup, code samples, and performance comparisons across 100‑, 300‑ and 500‑thread tests.
This article analyzes why MySQL recommends auto_increment primary keys over UUID or non‑sequential Snowflake IDs by creating three tables, running Spring Boot/JdbcTemplate performance tests, and examining index structures, lock contention, and fragmentation to guide optimal primary‑key selection.
This article explains the principles and practical implementations of plugin-based development in Java, covering SPI, custom configuration, runtime JAR loading, and Spring Boot factories, and demonstrates how to build flexible, extensible systems with real code examples.
Learn how to implement RFC 7807 Problem Details in Spring Boot 3, covering the JSON format, Spring’s built‑in support, configuration steps, custom extensions, and practical code examples for handling errors with ProblemDetail, ErrorResponse, and ResponseEntityExceptionHandler.
This article explains how to handle common failure scenarios in Spring Boot by using the spring-retry library, detailing the @Retryable and @Recover annotations, their parameters, configuration steps, code examples, and important considerations for building resilient backend services.
This article explains the concept of plugin‑based development in Java, outlines its advantages such as decoupling and extensibility, and provides detailed implementation guides using ServiceLoader, custom configuration files, and Spring Boot's spring.factories mechanism with complete code examples.
This article explains why and how to use plugin mechanisms in Java, covering the benefits of modular decoupling, common implementation patterns such as ServiceLoader, custom configuration loading, and Spring Boot's spring.factories, and provides step‑by‑step code examples and practical case studies.
This article explains the differences between JAR and WAR packaging for Spring Boot applications, shows why embedded Tomcat behaves differently from external Tomcat, and provides step‑by‑step instructions with Maven commands and pom.xml modifications to build both JAR and WAR artifacts.
This article explains the concept and advantages of plugin-based development, outlines common implementation strategies in Java, demonstrates practical SPI and custom configuration approaches, and shows how Spring Boot’s spring.factories mechanism can be used to build extensible backend systems.
This article introduces Spring WebFlux, a reactive web framework introduced in Spring 5, explains the concept of reactive programming, compares it with Spring MVC, describes its concurrency model, and provides practical code examples for building a WebFlux application with Spring Boot.
Easy-Trans is a Spring Boot starter that leverages ORM frameworks like MyBatis‑Plus, JPA, and BeetlSQL to automatically translate IDs, dictionary codes, and enum values into human‑readable data, supporting caching, multi‑data‑source, micro‑service RPC, and flexible configuration for backend developers.
This article introduces Spring WebFlux as a reactive, non‑blocking web framework for Java, explains the concepts of reactive programming, compares it with Spring MVC, and provides practical code examples—including Mono/Flux usage, routing, and handlers—to help developers build and run a WebFlux application with Spring Boot.
The article explains MyBatis first‑level and second‑level caching mechanisms, their activation conditions, integration pitfalls with Spring Boot, and how to enable and use them safely, including configuration steps, code examples, and warnings about hidden risks of second‑level cache.
Learn how to set up a complete CI/CD pipeline on CentOS 7 by installing Docker and Jenkins, configuring Maven, creating Dockerfiles, and automating the build, test, and deployment of a Spring Boot application with detailed commands, screenshots, and best‑practice tips.
This article explains how to limit the number of requests an API endpoint can receive within a specified time window by creating a @RequestLimit annotation, a Redis‑backed interceptor, and the necessary Spring Boot configuration and controller examples.
This guide introduces MinIO as an S3‑compatible object storage service and walks through its installation, Maven dependencies, Spring Boot configuration, Java client setup, REST controller implementation for file upload, preview, download, and deletion, and includes debugging screenshots.
This guide walks through setting up Camunda BPM 7.18 with Spring Boot 2.6.14, configuring dependencies and application properties, designing a two‑step approval workflow, deploying it via custom REST endpoints, and managing process start and task approval using Camunda’s services and APIs.
This article explains why publicly exposed APIs are vulnerable, describes the concepts of anti‑tampering and anti‑replay protection, and provides a complete Spring Boot implementation—including request signing, timestamp and nonce validation, and Redis‑based replay detection—to safeguard API endpoints.
This article demonstrates step‑by‑step how to set up a high‑performance MinIO object storage service using Docker, configure it in a Spring Boot application, and integrate file upload functionality with a Vue/Element‑UI front‑end, including code snippets for Docker commands, Java client setup, and UI implementation.
This guide explains what a scaffolding tool is, why it’s essential for micro‑service development, and provides step‑by‑step instructions for creating, publishing, and using a Maven archetype scaffold with Spring Boot, including Maven configuration, version handling, and repository deployment.
This article explains how Spring Boot 3.0.5 processes errors, registers a default /error page, and returns either HTML or JSON responses based on the Accept header, detailing the underlying servlet and Tomcat mechanisms with code examples.
This article walks through configuring and using IntelliJ IDEA for remote debugging of a Spring Boot microservice, covering JVM arguments for different JDK versions, IDEA setup, startup script adjustments, and practical pitfalls such as log location, code consistency, and drop‑frame effects.
This article explains how to replace Spring Boot's default embedded Tomcat with Undertow, details the configuration steps, compares their performance and memory usage through benchmark results, and concludes that Undertow offers superior efficiency for high‑concurrency Java backend applications.
This article explains how to replace Spring Boot's default embedded Tomcat with the high‑performance Undertow server, details the necessary Maven dependencies and configuration steps, and presents benchmark results showing Undertow's superior throughput and lower memory usage under high‑concurrency workloads.
This guide walks you through installing Docker and Jenkins on CentOS 7, configuring Jenkins plugins, creating a freestyle job that builds a Spring Boot application with Maven, and deploying it via a Dockerfile for fully automated one‑click deployment.
This article explains Spring Boot's default JSON response, the internal HttpMessageConverter selection process, and how to configure XML and custom YAML responses by adding Jackson dependencies and implementing a custom HttpMessageConverter.
This guide introduces a lightweight Redis graphical management tool that offers full CRUD support for all Redis data types, outlines its Spring Boot backend and Vue frontend stack, provides step‑by‑step installation and Docker deployment instructions, and details current features, UI screenshots, and future development plans.
This article explains how to set up Docker on Windows, integrate it with IntelliJ IDEA, build and run a Spring Boot application inside a container, and connect the containerized service to a Redis instance, including configuration, Maven plugin setup, and troubleshooting steps.
This article introduces the MyBatis-Plus Generator UI, a web‑based tool that wraps MyBatis‑Plus code generation to quickly produce Spring Boot compatible entities, mappers, services and controllers, explains how to integrate it via Maven and a main class, and demonstrates its rich customization and UI features.
This article guides you through refining a classic three‑layer architecture into a domain‑driven design, structuring the project with Maven Archetype, and implementing a simple CMS with both backend (Spring Boot) and frontend (Vue) components, complete with step‑by‑step setup instructions.
This tutorial shows how to integrate Keycloak 21.1.1 with Spring Boot 3.1 and Spring Security, covering realm and client setup, token acquisition, Maven dependencies, JWT configuration, a protected test endpoint, and verification of authentication behavior.
This article demonstrates how to create a generic utility that uses Java reflection to export lists of arbitrary objects to CSV or Excel files, covering dependency setup, core implementation, custom annotation support, and practical usage examples.
This article introduces the URule rule engine, explains its background and features, walks through installation and usage in a Spring Boot project, details core concepts such as variable, constant, parameter, and action libraries, and provides complete code examples for rule sets and decision tables.
This guide walks through setting up MySQL master‑slave replication in Docker, configuring the instances, testing synchronization, then deploying Canal and integrating it with a Spring Boot 2.7.8 application to capture database changes and push them into Redis.
This article introduces a lightweight Redis graphical management tool, outlines its backend (Spring Boot) and frontend (Vue) architecture, provides step‑by‑step installation instructions including Docker usage, describes current features like multi‑user management and permission control, and shares future development plans with screenshots and the project repository link.
This document introduces a lightweight Redis graphical management tool, outlines its Spring Boot backend and Vue frontend architecture, provides step‑by‑step installation instructions including Docker deployment, details recent feature enhancements such as multi‑user support and permission control, and mentions future plans for clustering and sentinel modes.
TLog is a near‑zero‑intrusion logging framework that automatically tags logs with traceId and other context information, enabling fast end‑to‑end request tracing across microservices, supporting various integration methods, async threads, RPC, HTTP clients, gateways, MQ, and common task schedulers.
This guide explains ten practical ways to enforce robust parameter validation in Spring Boot applications, covering built‑in annotations, custom constraints, server‑side checks, meaningful error messages, internationalization, validation groups, cross‑field rules, exception handling, testing strategies, and client‑side considerations.
This tutorial demonstrates how to create Spring Boot scheduled tasks whose execution intervals can be changed at runtime using either a configurable cron expression or a flexible periodic trigger, complete with code examples and a REST API for updating the schedule.
This article explains the design and implementation of a business operation logging feature in a Spring Boot application, contrasting flawed hard‑coded approaches with a clean AOP‑based solution, and provides full code snippets, configuration, database schema, and testing tips.
This article introduces FACE-UI, a front‑back separated web application that implements facial login by capturing a photo via the browser, sending it to a Spring Boot backend, and using Tencent Cloud's face comparison API for authentication, with full setup instructions and code examples.
This article explains how to design and implement a business operation logging feature using Spring AOP in a Spring Boot project, covering requirement analysis, anti‑pattern pitfalls, AOP design, environment and dependency setup, database schema, annotation and aspect code, and testing procedures.
This article explains how to enable fuzzy search on encrypted sensitive fields such as phone numbers and ID numbers in a MySQL database by using Spring Boot, AOP, tokenized ciphertext mapping tables, and encrypted keyword queries to balance security and query performance.
This article explains how to create a reusable Spring Boot starter for enterprise‑level object storage services by leveraging the Amazon S3 protocol, covering OSS fundamentals, dependency setup, configuration properties, template interfaces, implementation, auto‑configuration, packaging, and testing with code examples.
This article explains the concept, advantages, design considerations, and step‑by‑step implementation of a multi‑tenant architecture using Spring Boot and Spring Cloud, covering database strategies, tenant isolation, dynamic routing, and deployment scenarios for SaaS applications.
This article introduces the URule rule engine, compares it with other engines, explains its features, demonstrates how to install and configure it in a Spring Boot project, and provides detailed guidance on creating variable, constant, parameter, and action libraries, building rule sets, decision tables, and applying them to real‑world scenarios.
This article presents sixteen practical Spring Boot best‑practice recommendations—including custom BOM management, auto‑configuration, project initialization, code organization, dependency injection, concurrency handling, externalized configuration, logging, testing, and more—to help developers build robust, maintainable microservices efficiently.
This article introduces Sa-Token, a lightweight Java permission authentication framework, explains why it was chosen over Spring Security and Shiro, details its core login and permission APIs, demonstrates integration with Spring Boot and WebFlux, and lists its extensive feature set for modern backend development.
This guide explains how to combine Kubernetes and Spring Boot to implement zero‑downtime releases by configuring readiness and liveness probes, defining graceful shutdown, applying rolling update strategies, setting up horizontal pod autoscaling, integrating Prometheus monitoring, and separating configuration via ConfigMaps for reusable images.
This article explains what circular dependencies are in Spring Boot, describes the symptoms and errors introduced in recent versions, and provides multiple practical solutions—including constructor injection, @Lazy, @DependsOn, and interface segregation—along with clear code examples for each approach.
