This tutorial demonstrates how to record and display website visitor statistics by using a Spring Boot backend with an IP‑based visitor identifier, a custom @VisitLog annotation, a MySQL visit‑log table, and a Vue front‑end component that shows PV and UV counts.
This article demonstrates how to achieve real‑time synchronization of MySQL data to Redis using Spring Boot 3, the open‑source mysql‑binlog‑connector‑java library, and optional JMX exposure, providing step‑by‑step setup, code examples for parsing binlog events, listening to changes, and configuring Maven dependencies.
This article explains how to solve interleaved logs in multi‑threaded pods by adding a unique X‑App‑Trace‑Id header, propagating it through a TraceIdFilter, storing it in SLF4J MDC, adapting Feign and thread pools, and integrating SkyWalking to enrich log patterns with trace identifiers.
This tutorial shows how to configure Spring Boot 3 to start multiple Tomcat servers, isolate services into separate modules with shared parent configuration, and test the endpoints, providing full code snippets and screenshots for each step.
This article walks through step‑by‑step how to create a simple CRUD service using Go's Gin framework with Gorm and MySQL, then shows the equivalent implementation with Java Spring Boot, MyBatis‑Plus and MySQL, comparing the two approaches and providing complete source code.
This tutorial demonstrates how to install Portainer, use it to deploy a Redis‑Sentinel cluster with master‑slave replication and custom bridge networking, test failover, and then integrate the Sentinel setup into a Spring Boot application with Lettuce connection pooling.
This article explains how to securely upload files to MinIO, generate token‑protected download links, and create kkfile preview URLs using Spring Boot, while avoiding exposure of the MinIO address and adding token authentication for enhanced security.
Learn how to use the lightweight Jpom automation tool to set up Docker‑based CI/CD pipelines, configure repositories, build and package a Spring Boot 3 + Vue e‑commerce project, and deploy both backend and frontend services seamlessly on a Kubernetes‑ready environment.
Explore comprehensive Spring Boot 3 Actuator capabilities—including enabling CORS, creating custom endpoints, configuring health indicators, HTTP tracing, security auditing, and process monitoring—through detailed explanations, YAML configurations, and full Java code examples, empowering developers to effectively monitor and manage production-ready applications.
This article explains how to package a Spring Boot application using Maven profiles and the assembly plugin, generate a zip deployment bundle, and deploy it on Linux with a custom shell script that supports start, stop, restart, and unzip operations.
This guide explains how to design and build a privacy‑focused, view‑once image sharing system using Spring Boot, MySQL, Thymeleaf, and optional cloud storage, covering requirements analysis, architecture, environment setup, code implementation, security considerations, performance optimizations, testing, and deployment.
This article walks through Spring Boot 3.2.5 enhancements including multithreaded bean initialization, the new @Fallback annotation, handling duplicate bean names, RestClient.create(URI) usage, header binding to records, expanded task‑scheduler metadata, and a host of other backend improvements.
This article demonstrates how to integrate Spring Boot with Minio, covering two upload strategies (backend‑mediated and presigned‑URL direct upload), environment setup, Maven dependency, configuration classes, generating upload credentials, front‑end upload logic, chunked/instant/resumable uploads, and merging file parts.
This article introduces the evolution of Java‑based workflow engines, compares Activiti, Flowable and Camunda, explains core BPMN concepts, and provides a detailed Spring Boot integration tutorial—including Maven dependencies, BPMN diagram creation, service task implementation, REST endpoint for diagram viewing, unit tests, and common troubleshooting tips.
This article explains how the @Order annotation and Ordered interfaces control bean, listener, runner, and aspect execution order in Spring Boot 3, providing step‑by‑step code examples, output demonstrations, and guidance on applying ordering to various Spring components.
This guide walks through building a Spring Boot and MySQL‑backed “burn after viewing” image sharing service, covering architecture, environment setup, entity and repository design, upload and automatic deletion logic, Thymeleaf UI with burn animation, error handling, optimization, and Docker deployment.
This article shares Hikvision software engineer salary data, interview experiences, detailed explanations of Spring Boot startup, Spring MVC request flow, MySQL index types and optimization, as well as Redis performance characteristics, multithreading support, and distributed lock usage.
This article presents a comprehensive guide to building a Spring Boot backend system by outlining essential design principles, detailing a multi‑module architecture with clear responsibilities, and providing complete Maven POM configurations for each module to enable scalable and maintainable development.
The article introduces Cool Request, a free open‑source IntelliJ IDEA plugin that streamlines Spring Boot backend API testing by providing in‑IDE request execution, method timing statistics, interceptor bypass, job triggering, Java pre/post scripts, response preview, and export to third‑party tools, complete with usage examples and code snippets.
This article introduces the core concepts and roles of OAuth 2.0, explains its four grant types, and provides a step‑by‑step Spring Boot implementation with complete configuration classes, dependency setup, and testing procedures for both authorization and resource servers.
This article explains how to use the Flowable BPMN engine in a Spring Boot project, covering workflow basics, related BPMN concepts, Maven dependencies, diagram creation, service‑task implementation, REST API for diagram viewing, unit testing, and common pitfalls such as font configuration and process definition updates.
This article explains how Spring Boot supports asynchronous request handling after Servlet 3.0, demonstrates three practical approaches—Callable, WebAsyncTask, and DeferredResult—with code examples, shows how to configure a custom thread pool, and discusses when asynchronous processing improves throughput.
This article explains how to use Spring Boot 3's TaskScheduler API, @Scheduled annotations, cron expressions, macro shortcuts, reactive support, virtual threads, and custom scheduling configuration, providing code examples and configuration tips for reliable backend task execution.
This article benchmarks several popular JDK distributions on Kubernetes using a Spring Boot 3 application, measuring image size, startup time, memory consumption, and throughput with k6, and concludes that performance differences are minimal after repeated testing.
This tutorial walks through creating an intelligent airline‑ticket customer‑service agent using Spring AI Alibaba, covering requirements, architecture, RAG integration, function calling, chat memory, core capabilities, code implementation with ChatClient, and a sample running result.
This guide walks through building and running the kkfileviewer Docker container, then shows how to add MinIO to a Spring Boot application with configuration, a client bean, utility methods, and REST endpoints for uploading files and retrieving presigned preview URLs to display in the kkfileviewer UI.
This article explains how to externalize and dynamically adjust a Spring Boot thread pool's core and maximum sizes using Nacos as a configuration center, allowing runtime changes without service restarts and demonstrating the setup, code, and testing procedures.
This tutorial explains Java Agent technology, shows how to implement a custom agent using the Instrumentation API and Javassist, integrates it with a Spring Boot 3 application to log API execution time, and provides step‑by‑step packaging and execution instructions.
This tutorial explains how to use Netty to create a Java backend server with WebSocket support, covering server initialization, channel configuration, pipeline setup, custom handlers, and message‑push services, and includes complete code examples for each component.
This article introduces a Spring Boot code‑generation tool that automatically creates database tables, entity classes, DAO interfaces, service layers and controllers, turning weeks of manual CRUD development for dozens of tables into a matter of minutes, and explains its design, templates, dynamic parameters and usage.
This article explains why consistent date formatting is crucial in Spring Boot APIs, outlines common scenarios such as front‑end data exchange, database storage and logging, and presents multiple server‑side and client‑side solutions—including SimpleDateFormat, DateTimeFormatter, global Jackson settings, annotations, custom converters, and timestamp output—complete with code examples.
This tutorial explains how to replace the basic @Scheduled annotation with the flexible XXL‑Job distributed scheduler, covering repository download, admin deployment, database initialization, Spring‑Boot executor configuration, job registration for Douyin and Bilibili hot‑search crawling, and a Vue front‑end component for displaying ranked results with real‑time update timestamps.
This guide demonstrates how to integrate OpenFeign with Resilience4j in Spring Boot, covering dependency setup, Feign client definition, fallback implementation, circuit breaker configuration, custom timeout settings, and generating circuit names, enabling robust, fault‑tolerant microservice communication.
This article presents a step‑by‑step guide on building a Snapchat‑style “burn after reading” image sharing system using Spring Boot, MySQL, Thymeleaf, and optional cloud storage, covering background analysis, architecture design, environment setup, code implementation, optimization, testing, and deployment.
This article explains Apache Shiro’s fundamental components—Subject, SecurityManager, Realm, Session, authentication, authorization, and cryptography—then walks through a complete configuration example, a custom Realm, JWT integration, and a Spring Boot microservice scenario to illustrate secure, stateless authentication and fine‑grained permission control.
This article introduces a comprehensive set of Spring Boot utility classes—including assertion helpers, object and string utilities, collection operations, file and resource handling, reflection tools, and AOP utilities—providing code examples and usage guidelines for Java backend development.
Learn step‑by‑step how to integrate Spring AI Alibaba into a Spring Boot backend, configure API keys, add necessary dependencies, create a CORS‑enabled chat controller, and then develop a matching React frontend that streams AI responses, enabling a complete Java‑to‑React AI chat application.
This article demonstrates how to handle Java Long precision loss in Spring Boot 3 front‑end displays, configures Jackson to serialize Long as String, uses @JsonValue for single‑property serialization, and creates custom annotations with a SensitiveSerializer for data masking, complete with code examples and screenshots.
This article explains how to use Filebeat as a lightweight log shipper together with Graylog for centralized log aggregation, storage, and analysis, covering installation, configuration files, Docker deployment, Spring Boot integration, and query techniques for efficient operations monitoring.
Learn how to replace manual jar uploads and java -jar commands by configuring IntelliJ IDEA and Docker for one‑click remote deployment of Spring Boot applications, covering prerequisite setup, Docker daemon basics, Dockerfile creation, and step‑by‑step configuration to streamline and automate the deployment process.
This article explains various Spring Boot approaches for formatting dates in API responses, covering frontend JavaScript utilities, Java SimpleDateFormat and DateTimeFormatter, global Jackson settings, annotation‑based formatting, custom converters, ControllerAdvice initBinder, and timestamp output methods.
This article examines common pitfalls in Spring Boot controller implementations, demonstrates how to refactor messy controllers into clean, maintainable code using @Valid for input validation and a centralized exception handler, and highlights best‑practice guidelines for backend development.
WeBlog is a Spring Boot and Vue 3.2 based full‑stack blog that combines a MySQL‑backed backend with JWT authentication, MinIO storage, and a hand‑crafted Element Plus admin UI, offering markdown publishing, analytics dashboards, and open‑source repository links for developers to explore.
This guide explains Apache Tika's document parsing capabilities, shows how to download and run the Tika app, demonstrates extracting text and metadata from a PDF, and provides step‑by‑step instructions for integrating Tika into a Spring Boot project with full code examples.
This article walks through the complete process of implementing WeChat QR code login using a Java Spring Boot backend, covering prerequisite configuration, Maven dependencies, configuration classes, QR code generation, callback handling, session storage in Redis, and frontend integration.
This article demonstrates several techniques—including @Bean methods, @Component inheritance, BeanFactoryPostProcessor, and custom FactoryBean implementations—to instantiate multiple beans of the same class in a Spring Boot 3 application, comparing their advantages and limitations.
This article explains how to achieve lossless releases for Spring Boot microservices by deregistering old instances, handling shutdown hooks, configuring graceful shutdown in Spring Boot 2.3+, and integrating custom interceptors for various containers and registration centers.
This article examines the challenges of sprawling order‑processing code in logistics systems and presents a strategic component‑based approach using the open‑source LiteFlow framework, detailing its architecture, execution rules, example XML flow, Java implementations, and key advantages for scalable backend development.
This article introduces Apache Tika for document parsing, outlines its key advantages, and provides step‑by‑step Spring Boot 3 examples—including facade parsing, text, PDF, auto‑detect, HTML conversion, custom configuration, and file‑upload integration—complete with code snippets and output screenshots.
This article walks through setting up a Spring Boot project, explains version compatibility between Spring Cloud, Spring Boot, and Kafka, demonstrates common pitfalls, and provides essential scaffold code such as global exception handling, logging, CORS configuration, Swagger setup, and response wrappers.
This article walks through Spring Boot 3's powerful extension points—including AutoConfigurationImportFilter, ApplicationContextFactory, SpringApplicationRunListener, and ApplicationContextInitializer—showing how to implement, register, and test custom behavior with complete code examples and configuration steps.
This guide walks through installing the kkfileviewer container, building its Docker image, running it, and then integrating MinIO storage into a Spring Boot project with full configuration, utility classes, and REST endpoints for file upload and preview.
This tutorial explains how to design a MySQL table for hot‑search records, generate Java entity and mapper classes using MyBatis Generator, create unique IDs for each entry, and implement scheduled Java crawlers for Douyin and Baidu hot‑search data that persist the results via Spring‑Boot services.
This article explores the Java Optional class with practical examples, showing how to avoid NullPointerException, simplify exception handling, provide default values, chain operations, and improve code readability in Spring Boot 3 projects.
This article explains how to secure Spring Boot deployment packages by using Maven plugins for code obfuscation and encryption, configuring classfinal‑maven‑plugin to encrypt class files, configuration files, and libraries, and demonstrates password‑less and password‑protected startup as well as machine‑bound execution to prevent reverse engineering.
This article demonstrates how to enable and use Spring Boot 3's @Async annotation together with Java's CompletableFuture to create custom thread pools, run multiple asynchronous REST calls concurrently, aggregate their results, and handle exceptions, providing a complete backend solution for high‑performance APIs.
This article explains how to use Prometheus together with Spring Boot Actuator and Micrometer to collect, expose, and visualize application metrics, including step‑by‑step dependency configuration, YAML settings, Docker deployment of Prometheus and Grafana, and adding custom metrics for comprehensive monitoring.
This article explains what Java virtual threads are, how they differ from regular OS threads, demonstrates configuring Spring Boot to use them, and presents performance benchmarks showing virtual threads dramatically outperform traditional threads in both async service calls and simple HTTP requests.
This article explains how to use Filebeat as a lightweight log shipper together with Graylog, Elasticsearch, and MongoDB to collect, process, and visualize logs from multiple environments, including detailed configuration examples, deployment scripts, and integration with Docker and Spring Boot.
This article walks through the challenges of setting up a Java development environment, demonstrates how to create a Spring Boot project, explains version compatibility between Spring Cloud, Spring Boot, and Kafka, showcases essential Maven configurations and code snippets for global exception handling, logging, CORS, Swagger, and recommends useful in‑memory tools such as embedded Redis, DB, Kafka, Hutool, MyBatis‑Plus, MapStruct, and Redisson.
This article demonstrates how to implement fine‑grained permission checks in Spring Boot 3 without using Spring Security, by creating custom HandlerInterceptors, JWT utilities, DAO and service layers, and integrating SpEL expressions for dynamic authorization, complete with code snippets and test results.
This guide walks you through setting up Ollama for local large‑model serving, creating a Spring Boot project with Spring AI support, writing a unit test to query the model, and explains how to add the necessary dependencies for AI integration in existing Java applications.
This article explains how to integrate Spring Boot with Java Deeplearning4j to create a traffic sign recognition system, covering CNN fundamentals, dataset organization, Maven dependencies, data loading, model construction, training, prediction, and unit testing, complete with code examples.
This article explains why stale JavaScript can break functionality, outlines the risks of caching such as outdated bugs, security flaws, and debugging difficulties, and provides practical Java‑side solutions—including versioned URLs, cache‑control headers, static‑resource policies, and ETag/Last‑Modified handling—to ensure browsers always load the latest scripts.
This article demonstrates how to dynamically load Spring Boot configuration from a database and refresh specific beans at runtime using Spring Cloud's ContextRefresher, enabling configuration changes without restarting the application.
Learn how to efficiently convert internal entities to external DTOs in Spring Boot 3 using ModelMapper, covering library comparisons, Maven setup, configuration, entity and DTO definitions, service, facade, controller implementation, and advanced features like custom mappings, property skipping, value conversion, and conditional mapping.
This guide demonstrates how to use Spring State Machine to elegantly manage order status changes by defining states, events, configuring transitions, and implementing listeners, providing Maven dependencies and Java code examples for building extensible, event‑driven workflows in backend applications.
This article demonstrates two practical methods for restricting request IPs—configuring allow/deny rules in Nginx and building a Spring Boot whitelist check using a custom HandlerInterceptor, complete with database schema, service logic, and MVC configuration.
This article walks through creating a Spring Boot project, handling IDE setup, managing Spring Cloud and Kafka version compatibility, using Maven for dependency management, and provides essential scaffold code such as global exception handling, logging aspects, CORS configuration, and Swagger integration.
The article details how a Java SDK for a CIM instant‑messaging system was redesigned using Java 8+ features and the Builder pattern, introduced a lightweight proxy resembling RPC frameworks with dynamic‑URL support, and added comprehensive integration tests that verify automatic client reconnection and reliable message delivery across clustered servers.
This article presents ten practical techniques—including built‑in annotations, custom constraints, server‑side checks, internationalized messages, validation groups, cross‑field rules, exception handling, testing, and client‑side considerations—to help developers implement robust validation in Spring Boot applications.
This article provides a comprehensive guide to using Alibaba's JetCache in Java Spring Boot projects, covering dependency setup, configuration of local and remote caches, annotation‑based caching, API usage, testing procedures, and troubleshooting common integration errors.
This article provides a comprehensive, step‑by‑step guide to using Spring Boot 3's @ComponentScan annotation, covering basic usage, package filtering, include/exclude filters, lazy initialization, custom name generators, scoped proxies, and custom scope resolvers, complete with runnable code samples and output screenshots.
This article walks through the design and implementation of symmetric request/response encryption for a Spring Boot API, covering requirement analysis, data models, custom ControllerAdvice for decryption and encryption, serialization challenges with FastJson and Jackson, and final configuration to keep encrypted payloads consistent across Android, iOS, and H5 clients.
This article explains how to use Spring Boot's built‑in request logging, request/response wrappers, OncePerRequestFilter, and AOP utility classes such as AopContext, AopUtils, and ReflectionUtils, providing configuration snippets and practical code examples for backend developers.
This article explains what Tomcat is, its core functions, how to set up a simple servlet manually, and why Spring Boot hides Tomcat by default while still allowing you to switch to alternatives like Jetty or Undertow.
This article introduces Alibaba's JetCache Java caching framework, explains how to integrate it with Spring Boot and Redis, provides detailed configuration and code examples for local, remote, and multi‑level caches, and covers testing procedures and common error resolutions.
This article introduces four Java HTTP client libraries—Java HttpClient, Apache HttpComponents, OkHttp, and Spring WebClient—explains their key features, provides async GET and sync POST code examples for each, and offers guidance on selecting the right client for Spring Boot and plain Java projects.
Bean Searcher is an open‑source, Apache‑2.0 licensed ORM search engine that outperforms MyBatis by up to 100×, offering one‑line multi‑table joins, pagination, dynamic sorting, field aggregation, and extensive extensibility, with simple Spring Boot integration and customizable components for rapid backend development.
This comprehensive tutorial explains how to design and implement RESTful APIs with Spring Boot 3.2.5, covering all major HTTP methods (GET, HEAD, POST, PUT, DELETE, PATCH), best‑practice endpoint design, response handling, status‑code usage, pagination, filtering, versioning, caching, and security considerations.
This article explains how to create a consistent JSON API response format—including custom status codes, message fields, and a Result wrapper—by using a @ResponseResult annotation, an interceptor, and ResponseBodyAdvice in Spring Boot, while also offering tips for optimization and error handling.
The article explains why UUIDv4 primary keys hurt performance and storage, then demonstrates how to replace them in a Spring Boot 3.3 application with a custom Snowflake‑based 64‑bit ID generator, providing full Maven setup, configuration, entity, service, REST controller, and Thymeleaf UI example.
This tutorial demonstrates how to use the mybatis-plus-join (MPJ) library to perform left and right join queries in a Spring Boot project without writing XML, covering dependency setup, mapper changes, query construction, pagination, and practical code examples.
This article walks through creating a Spring Boot 3 application from scratch, demonstrating how to customize the ApplicationContext, embed a Tomcat server, define a custom SpringApplication class, configure web components, and test REST endpoints, providing complete code snippets and explanations for each step.
This guide walks through installing kkfileviewer in a Docker container, building and running the image, then shows how to add MinIO support to a Spring Boot project with Maven dependencies, configuration classes, utility methods, and REST endpoints for file upload and preview.
This article explores Spring Boot's asynchronous task and request mechanisms, detailing how @EnableAsync, @Async, @EnableScheduling, and @Async annotations configure thread pools, examines the underlying source code, and demonstrates custom configurations for executors and schedulers to control concurrency.
This article provides a comprehensive analysis of how Spring Boot integrates Log4j2 (and Logback), detailing the internal logging architecture, configuration options, initialization flow, logger groups, and how to perform hot updates of logger levels via the LoggersEndpoint or custom APIs.
This tutorial walks through six practical techniques—@Qualifier, @Primary, @Profile, collection injection, @Priority, and custom @Conditional—to control which implementation of a Spring Boot interface is autowired, complete with code examples and usage tips.
This article explains how to configure a Spring Boot scheduled task to execute just once, covering three approaches—specifying a start time with TaskScheduler, using @Scheduled with an initial delay, and creating a custom PeriodicTrigger—complete with runnable code examples.
This article explains how Spring Boot can handle HTTP requests asynchronously using Callable, WebAsyncTask, and DeferredResult, detailing the underlying servlet workflow, thread‑pool configuration, and when asynchronous processing truly improves throughput versus CPU‑bound workloads.
This article introduces the Forest Java HTTP client, explains its architecture and dynamic‑proxy mechanism, and provides step‑by‑step Spring Boot examples—including dependency setup, configuration, declarative interfaces, request annotations, parameter handling, and programmatic usage—so developers can quickly adopt declarative HTTP calls in their backend services.
This article explores four common batch‑update techniques in MyBatis, compares their performance, shows how to configure Druid and Spring Boot to allow multi‑statement execution, and provides practical code examples and configuration tips for reliable large‑scale data updates.
This article introduces RabbitMQ, explains its core features and messaging model, discusses why to use it for asynchronous, decoupled, and throttled processing, and provides step‑by‑step installation instructions for macOS, Windows, and CentOS along with Java code examples for configuring and using delayed messages via the rabbitmq_delayed_message_exchange plugin.
By implementing a plug‑in architecture that uses a custom URLClassLoader to load and unload JAR‑packaged governance tasks at runtime, the Spring Boot application can dynamically register Spring beans and XXL‑Job handlers, remove them cleanly, update configuration via YAML or Nacos, and package the solution with Maven Shade without restarting services.
Learn how to enable and test Java 21 virtual threads in Spring Boot 3.2.5, compare their throughput against platform threads with JMeter, and explore performance limits through sample code and benchmarks, revealing when virtual threads excel and their constraints for CPU‑bound tasks.
This article explains how Spring Boot integrates Log4j2, details the internal logging initialization process, describes logger and LoggerConfig relationships, and demonstrates how to hot‑update logger levels using LoggersEndpoint or custom endpoints without restarting the application.
The article explains how exposed API endpoints can be intercepted and altered, and presents practical security measures—including HTTPS, encrypted parameters, timestamp‑based signatures, and a Spring Boot filter implementation—to detect and block tampering and replay attacks in a Java backend.
This article explains how to design a two‑level leave‑approval process using the Activiti BPMN engine, covering diagram creation, Spring‑Boot configuration, deployment, task handling, exclusive gateways, database tables, API overview, and practical tips for extending the workflow.
This guide explains how to use Maven plugins such as spring-boot-maven-plugin, maven-dependency-plugin, and maven-jar-plugin to package a Spring Boot application into an executable JAR with external lib dependencies, and shows how to deploy the resulting artifacts in a Docker container using a custom Dockerfile.
This article introduces Spring Boot's new RestClient, compares it with RestTemplate and WebClient, and provides detailed code examples for creating clients, performing GET/POST/PUT/DELETE requests, handling errors, customizing interceptors, and enabling load‑balanced service discovery.
