This step‑by‑step guide shows how to enable Alibaba Cloud Function Compute, create a service and Java 17 function, configure a custom domain, export and edit the generated Spring Boot project, and adjust the listening port, enabling rapid serverless deployment for beginners.
This article introduces Spring WebFlux, explains the concept of reactive programming, compares it with Spring WebMVC, describes its concurrency model, and provides complete code examples for building a reactive Spring Boot application using Mono, Flux, functional routing, and WebClient.
This tutorial walks through configuring Spring Security 5.4 on Spring Boot 2.4, demonstrating how to set up in‑memory user credentials, handle CSRF tokens during GET and POST requests, and customize the security filter chain to enable or disable CSRF protection.
This guide walks through setting up Docker and Jenkins on CentOS, configuring a Spring Boot project, creating a Jenkins pipeline, and automating build, test, and deployment steps to achieve one‑click continuous integration and delivery.
This tutorial demonstrates how to use the MyBatis-Plus-Join (MPJ) library to perform left and right join queries in Spring Boot without writing XML SQL, covering dependency setup, entity and mapper modifications, query construction with MPJLambdaWrapper and MPJQueryWrapper, pagination support, and practical tips.
This tutorial walks through the complete process of configuring MySQL master‑slave replication, preparing Docker containers, configuring MyBatisPlus and ShardingSphereJDBC for read‑write splitting, building a Spring Boot project with the necessary dependencies, generating code, and testing the setup with sample controller endpoints.
This article explains how to structure Spring Boot controller requests, apply elegant parameter validation, wrap responses with a consistent ResultVo format, handle validation and business exceptions uniformly using @RestControllerAdvice, and selectively disable wrapping for specific endpoints, providing a complete backend development guide.
This guide walks beginners through the concepts, advantages, and practical steps of using Alibaba Cloud Function Compute to deploy popular web frameworks like Spring Boot and Express, create a custom Web IDE, and configure domains, while highlighting serverless architecture benefits and cost considerations.
When generating large IDs using Snowflake-like algorithms, Java's 64‑bit long values exceed JavaScript's safe integer range, causing display errors; the article explains how to resolve this by serializing Long values as strings in Spring Boot using Jackson's ToStringSerializer, both via configuration and annotations.
Learn how to enable JAX‑RS (Jersey) support in Spring Boot 2.4.12 by adding the starter dependency, defining custom endpoints, configuring ResourceConfig, and managing servlets, filters, and listeners, including advanced customizations of embedded servlet containers such as Tomcat, Jetty, and Undertow.
This article details how a hidden 100 ms latency in a Spring Boot channel service was identified and resolved by tracing request flow, using the Arthas Java diagnostic tool, and ultimately fixing a Tomcat‑embed bug caused by Swagger‑ui resources.
This article outlines the latest Spring Framework 5.3.20 release, highlighting new GraphQL MIME support, SAML logout policy tweaks, numerous bug fixes—including property precedence and logging issues—and a comprehensive list of updated third‑party dependencies.
This tutorial walks through integrating MyBatis-Plus into a Spring Boot project, covering dependency setup, configuration, entity annotations, CRUD service and mapper usage, pagination, logical deletion, enum handling, automatic field filling, and multi‑data‑source management, complete with code examples and testing.
This guide walks through integrating MyBatis-Plus with Spring Boot, covering environment setup, Maven dependencies, configuration of data sources, entity annotations, CRUD services, pagination, logical deletion, enum handling, automatic field filling, multi‑data‑source strategies, and testing with full code examples.
This article explains the concept of idempotency, why it is needed for HTTP interfaces, the impact on system design, and presents several practical backend solutions—including database unique keys, optimistic locking, anti‑repeat tokens, and downstream sequence numbers—accompanied by complete Spring Boot code examples using Redis for token management.
This article demonstrates how to create a simple lottery application using Spring Boot, MyBatis‑Plus, and Redis, covering project setup, database schema, dependency configuration, Redis integration, event‑driven data initialization, lottery draw logic, stock management, and asynchronous record handling.
This article provides a comprehensive guide to building a JWT authentication service in Java, covering JWT fundamentals, Spring Boot configuration, entity and DAO definitions, service interfaces, token generation and parsing, RSA key handling, controller endpoints, testing procedures, and a comparison with traditional session-based authentication.
This article explains how Spring Boot's default /error mapping works, how to customize error responses with ErrorController, ErrorAttributes, @ControllerAdvice, custom HTML pages, ErrorViewResolver, ErrorPageRegistrar, and how to configure CORS globally or per controller.
This article provides a comprehensive guide to integrating the Quartz job‑scheduling library with Spring Boot, covering core concepts, Maven setup, job and trigger definitions, concurrency control, dynamic task creation via REST, and initialization strategies, all illustrated with complete Java code examples and diagrams.
This article provides a detailed tutorial on integrating MyBatis-Plus into a Spring Boot project, covering dependency setup, configuration, entity annotations, CRUD operations, pagination, logical deletion, enum handling, automatic field filling, and multi‑datasource support, with complete code examples.
This article explains traditional HTTP session handling, the problems of session sharing in clustered environments, two common session‑sharing strategies, and introduces single sign‑on (SSO) concepts with a detailed CAS‑based implementation using Spring Boot, Redis, and Java filters.
This guide details nine practical techniques for accessing files in a Java project's resources folder, covering classloader paths, URL decoding, getFile vs getPath, InputStream retrieval, ClassPathResource usage, absolute paths, and environment variable methods, with complete code examples for each approach.
This article explains how Spring Boot serves static resources from default locations, how to customize static path patterns and resource locations, handle Webjars, configure content negotiation with parameters and custom media types, and integrate template engines such as Thymeleaf, FreeMarker, and Mustache.
This article explains why unified authentication is essential for product suites, reviews traditional session mechanisms and their limitations in clustered environments, explores session‑sharing strategies, introduces CAS‑based SSO workflows, compares CAS with OAuth2, and provides a complete Spring Boot demo with code snippets and configuration details.
A comprehensive guide walks you through integrating MyBatis-Plus with Spring Boot, detailing dependency setup, configuration, entity annotations, CRUD operations, pagination, logical deletion, enum mapping, automatic field filling, multi‑datasource handling, and testing, all illustrated with runnable code examples.
This article explains the concept of idempotency in computing and HTTP, why it is essential for APIs, the impact on system design, which RESTful methods are idempotent, and presents four practical implementation strategies—including database primary keys, optimistic locking, anti‑repeat tokens, and downstream sequence numbers—accompanied by complete Spring Boot code examples and testing procedures.
This tutorial explains how to configure MySQL master‑slave replication using Docker, set up read‑write splitting with ShardingSphereJDBC, integrate MyBatis‑Plus, and build a Spring Boot application that demonstrates write operations on the master and read operations on the slave.
This article demonstrates how to mask sensitive data such as phone numbers, ID cards, and emails in MySQL and Java applications by combining SQL string functions with the MyBatis‑Mate Sensitive Jackson plugin, providing complete configuration, custom strategies, and runnable Spring Boot examples.
This article introduces asynchronous programming concepts in Java, explaining how multithreading, Future, FutureTask, CompletableFuture, and Spring's @Async annotation can transform synchronous workflows into high‑throughput, low‑latency solutions, with code examples and practical guidance for implementing each technique.
This article explains several server‑side techniques for real‑time web message push—including short and long polling, hidden‑iframe streaming, Server‑Sent Events, MQTT, and WebSocket—provides their principles, advantages, drawbacks, and complete Spring Boot/Java code examples for each approach.
Passing an HttpServletRequest into an asynchronous thread in Spring Boot can cause mysterious parameter loss and request‑recycling bugs, because Tomcat reuses request objects; the proper solution is to employ the servlet's startAsync and AsyncContext.complete methods for safe async processing.
This guide introduces the open‑source mica‑mqtt library built on t‑io, explains how to add the Spring Boot starter dependency, configure client options, implement connection listeners, customize settings, perform subscriptions and publishing, and also covers shared subscription modes, jfinal integration, and usage in plain Java projects.
This article explains how to create and configure Spring Boot scheduled tasks with @Scheduled, covering property‑based settings, cron expressions, fixed‑rate and fixed‑delay options, the required @EnableScheduling annotation, and how to switch from the default single‑thread executor to a multi‑threaded pool for concurrent execution.
This guide explains how Spring Boot 2.4.12 automatically configures Spring MVC components such as view resolvers, converters, and message handlers, and shows how to customize them via WebMvcConfigurer, WebMvcRegistrations, HttpMessageConverters, and @JsonComponent, including code examples for full control over the Web MVC setup.
This article demonstrates how to configure Spring Boot for multiple environments, retrieve custom parameters, package and run the application, modify startup settings via system variables or command‑line arguments, and explains the priority and detailed JVM options for optimizing a Spring Boot service.
This article explains the principles behind Spring Boot Starters, how auto‑configuration works via META‑INF/spring.factories, provides practical code examples, and lists the most common starters to help Java developers streamline dependency management and reduce configuration complexity.
This tutorial walks through setting up MySQL master‑slave replication using Docker, configuring ShardingSphereJDBC for read‑write splitting, and integrating it into a Spring Boot project with MyBatis‑Plus, covering environment preparation, core theory, detailed configuration, and testing procedures.
This article explains how to implement WeChat QR code login using OAuth2.0 in a Spring Boot backend, detailing the authorization flow, required configuration, code examples for obtaining access tokens, user authentication, Spring AOP login verification, and exception handling to securely integrate WeChat login into a Java application.
This article explains common pitfalls in Java API design—such as inconsistent return formats, missing error handling, and inappropriate parameters—and demonstrates how a unified ResultBean, strict controller conventions, and AOP logging can dramatically improve code readability, maintainability, and error management in Spring Boot projects.
This article explains what Flyway is, its migration types and common commands, shows how to integrate Flyway with Spring Boot via Maven dependencies and YAML configuration, provides sample versioned and repeatable migration scripts, and demonstrates the migration process with log output.
This article provides a comprehensive step‑by‑step guide on building a permission management system with Spring Security, covering database design, entity classes, Maven configuration, security configuration, dynamic menu loading, front‑end rendering using Thymeleaf, and complete testing with sample code and screenshots.
This article details a step‑by‑step investigation of a Java Spring‑Boot service that suffered nightly response‑time alerts, revealing that misconfigured Logback file paths caused cross‑volume log rotation, thread blocking, and ultimately a production outage, and shows how gray‑deployment and environment fixes resolved the issue.
This article presents a comprehensive overview of a hand‑crafted RPC framework built with Spring Boot, Netty, and Zookeeper, covering its core concepts, architecture, custom message protocol, load‑balancing strategies, serialization choices, starter design, deployment steps, and testing procedures.
This article demonstrates how to create a Java annotation for access limiting, implement the corresponding Spring Boot interceptor that checks Redis counters, register the interceptor in the application, and apply the annotation to a controller method to enforce request rate limits.
This article explains the advantages of Caffeine Cache's W‑TinyLFU algorithm over traditional FIFO, LRU, and LFU policies, details its eviction and reference‑type strategies, and provides step‑by‑step guidance for integrating Caffeine into Spring Boot applications with code examples and configuration tips.
This article explains how to implement a unified response format and centralized exception handling in Spring Boot applications using @RestControllerAdvice, @ControllerAdvice, ResponseBodyAdvice, and custom response entities, providing code examples and best‑practice guidelines for robust backend APIs.
This tutorial explains what SSO and CAS are, outlines the required development environment, walks through downloading, building, and deploying the CAS Server, shows how to configure the server and client (including disabling HTTPS for testing), and demonstrates successful cross‑application authentication with code examples.
This article demonstrates how to create a configurable, multi‑strategy data‑masking solution in Spring Boot by defining custom annotations, serializers, and integrating them with Jackson's ObjectMapper to automatically mask sensitive fields in API responses.
This guide walks through obtaining a free SSL certificate, exporting it from the provider, and configuring a Spring Boot application to use the certificate, including detailed steps, screenshots, and the necessary server.yml configuration.
This article demonstrates how to implement a flexible data‑masking solution for sensitive fields in Spring Boot APIs by defining a custom annotation, creating a serializer, integrating it with Jackson via an AnnotationIntrospector, configuring the ObjectMapper, and applying the annotation to domain objects.
This article explains how to integrate the CAS (Central Authentication Service) single sign‑on solution into a Spring Boot backend by adding necessary dependencies, configuring a series of CAS filters, creating a custom MyAuthenticationFilter to handle AJAX requests, and demonstrating a Vue.js frontend that interacts with the authentication flow, complete with screenshots of the login, ticket validation, and logout processes.
This article explains Spring Boot's caching mechanism based on the JSR‑107 JCache specification, details core interfaces and implementations like Cache, AbstractValueAdaptingCache, and ConcurrentMapCache, demonstrates cache annotations such as @Cacheable, @CachePut and @CacheEvict, and shows how to replace the default in‑memory cache with Redis using Docker, StringRedisTemplate, and custom serialization.
This article explains how to create a flexible, annotation‑driven data‑masking solution for Spring Boot APIs by defining custom masking strategies, integrating a Jackson serializer, and configuring the ObjectMapper to automatically mask sensitive fields in response objects.
This article introduces an open‑source, Java‑backed and Vue‑fronted online exam platform, detailing its student and admin features, mini‑program support, technology stack, deployment options, usage steps, architecture diagram, screenshots, and source code download links.
This article explains the high‑performance Caffeine Cache library, its W‑TinyLFU eviction algorithm, various loading and eviction strategies, statistics collection, and how to integrate and configure it in Spring Boot using annotations and programmatic beans.
This article presents a complete food delivery system project built with Spring Boot and Vue.js, detailing its technology stack, modules, database setup, and step‑by‑step instructions for launching both the admin backend and mobile client, along with resource download links.
This guide explains how to create a music website using Vue 3 for the front‑end and Spring Boot with MyBatis for the back‑end, covering project features, technology stack, development environment, repository cloning, resource setup, configuration, and launch commands.
This article explains why a Spring Boot application can end up with two UserManager beans—one from @Configuration + @Bean and another from @Component—by analyzing bean definition overriding, the role of ConfigurationClassPostProcessor, and the impact of the allowBeanDefinitionOverriding setting across Spring versions.
This article explains multiple Spring Boot asynchronous execution techniques—such as @Async, CompletableFuture, WebAsyncTask, DeferredResult, and AsyncHandlerInterceptor—provides complete Java code examples, and discusses performance optimizations like increasing Tomcat connection limits, switching to Undertow, using ComponentScan, and buffered I/O.
This article introduces a music website built with Vue 3 on the client side and Spring Boot + MyBatis on the server side, detailing its features, technology stack, development environment, and step‑by‑step instructions for downloading, configuring, and running the full‑stack application.
This article explains Spring Boot’s auto‑configuration mechanism, focusing on how the spring‑boot‑autoconfigure module automatically sets up the embedded Tomcat server, detailing the relevant Maven dependencies, configuration classes, conditional annotations, and the lifecycle steps that create and start the Tomcat container.
This article walks through implementing symmetric request and response encryption for Spring Boot APIs—covering requirements, data models, controller examples, debugging serialization issues, and using ControllerAdvice with Jackson to ensure encrypted payloads remain compatible across Android, iOS, and H5 clients.
The article explains multiple methods for implementing asynchronous execution in Spring Boot, covering @Async annotation, Java 8 CompletableFuture, Callable, WebAsyncTask, DeferredResult, Tomcat connection tuning, container switching to Undertow, and async interception, all illustrated with complete code examples.
This article explains how to design and implement a stateless JWT‑based authentication center in Java, covering JWT fundamentals, token structure, RSA signing, Spring Boot microservice setup, JPA entity and DAO creation, service interfaces, REST endpoints, and a comparison with traditional session authentication.
This article explains how to structure Spring Boot controller methods to receive parameters, implement unified status codes, validation with @Validated, and automatic response wrapping using ResultVo and @RestControllerAdvice, while also providing custom exception handling and optional exclusion annotations for flexible API design.
This tutorial explains how to structure a Spring Boot controller layer, validate request parameters with @Validated, wrap responses in a standard ResultVo format, define unified status codes, and handle exceptions globally using @RestControllerAdvice and AOP, while also providing a way to skip wrapping for specific endpoints.
This article explains Spring Boot caching by introducing the JSR‑107 JCache specification, detailing core cache interfaces, showing the Spring Cache abstraction and its implementations, demonstrating cache annotations such as @Cacheable, @CachePut and @CacheEvict, and finally covering Redis setup and custom CacheManager usage.
This article explains how @InitBinder methods in Spring MVC can initialize WebDataBinder, register custom PropertyEditors, Converters, and Formatters, and demonstrates a complete example with code snippets, while also detailing the internal request‑handling flow that performs parameter binding and type conversion.
This article demonstrates how to build a QR‑code based login system using Spring Boot, MySQL, and WebSocket, covering database design, role definition, API creation, front‑end image handling, and real‑time authentication notification through server‑push messages.
This comprehensive guide walks you through designing a simple front‑end/back‑end microservice architecture, implementing it with Spring Boot, adding service discovery, monitoring, logging, tracing, and flow control, and finally deploying the entire system on a Kubernetes cluster with high availability and verification steps.
This article presents a step‑by‑step tutorial on designing a simple front‑end/back‑end separated microservice system, implementing it with Spring Boot, deploying it on Kubernetes, and enhancing reliability with multi‑instance registration, monitoring, logging, tracing, and traffic control mechanisms.
This article compares three stock‑deduction strategies—single‑field MySQL, sharded MySQL rows, and Redis incrby with Lua scripts—analyzes their concurrency issues, and provides a complete Spring Boot implementation using a distributed lock, Lua script, and callback for initializing stock.
This article explains how to structure a Spring Boot controller layer by separating URL, request method, request data, and response data, then introduces unified status‑code packaging with ResultVo, parameter validation using @Validated, and centralized exception handling with @RestControllerAdvice and AOP to produce consistent API responses.
This guide walks through designing a simple Java Spring Boot microservice architecture, implementing the services, deploying them on a Kubernetes cluster with Eureka registration, adding Prometheus‑Grafana monitoring, configuring logging, tracing, and flow‑control, and validating high availability using real‑time dashboards and tools like Lens.
This article explains what dead letters are in RabbitMQ, outlines their common causes, and provides a complete Spring Boot configuration and code examples for setting up dead‑letter exchanges, queues, TTL handling, message rejection, and consumer processing to reliably manage undeliverable messages.
This article explains how to replace Spring Cloud with Istio by creating a simple Spring Boot microservice that uses gRPC for communication, packaging it with Docker, deploying it on Kubernetes, and exposing it through an Istio gateway, complete with code examples and deployment instructions.
This comprehensive guide walks readers through designing a simple front‑end/back‑end separated microservice system, implementing it with Java Spring Boot, deploying it on a Kubernetes cluster, and adding high‑availability, monitoring, logging, tracing, and traffic‑control mechanisms using tools such as Eureka, Prometheus, Grafana, Zipkin, Sentinel and Lens.
This article provides a step‑by‑step guide to creating a simple Spring Boot microservice that uses gRPC for communication, integrates with Istio as a service mesh, containerizes the applications with Docker, and deploys both server and client to a Kubernetes cluster with full configuration files and code examples.
This guide explains how to protect sensitive Spring Boot configuration data by integrating the open‑source jasypt‑spring‑boot plugin, covering dependency addition, secret key setup, encryption of plaintext values, and customizing encrypted property syntax for seamless decryption at runtime.
This article walks through creating a simple Spring Boot microservice using gRPC, packaging it with Maven, containerizing it with Docker, and deploying both the server and client to a Kubernetes cluster with Istio sidecar injection, demonstrating how Istio removes service‑mesh logic from business code and enables seamless multi‑language microservice communication.
Since 2016, the author shares a collection of Spring Boot best practices—including using custom BOMs, leveraging auto‑configuration and starters, employing Spring Initializr, structuring code, designing services, managing databases, handling concurrency, externalizing configuration, global exception handling, logging, and thorough testing—to help developers build robust, maintainable microservices.
This article presents a detailed collection of Spring Boot best practices—from custom BOM dependency management and automatic configuration to project initialization, code structure, logging, testing, and configuration externalization—providing actionable guidance for building robust, maintainable micro‑services in Java.
This article introduces JetLinks, an open‑source, enterprise‑grade IoT platform built on a reactive Java stack, outlines its rich features and architecture, and provides step‑by‑step Docker and non‑Docker deployment instructions so developers can quickly launch and explore the system.
This article provides a detailed walkthrough of MyBatis‑Plus internals, covering the auto‑configuration of SqlSessionFactory, parsing of mapper XML and annotations, registration of mapper interfaces via @MapperScan, creation of dynamic proxies, and the final assembly of executable SQL scripts for database interactions.
This article explains how to add a universal app‑key whitelist authentication feature to a Spring‑Boot web framework by using four different mechanisms—traditional AOP, HandlerInterceptor, custom HandlerMethodArgumentResolver, and a Servlet Filter—while comparing their execution order and extensibility.
This article explains how to translate complex Domain‑Driven Design concepts into concrete code structures, covering domain objects, application services, infrastructure, and context integration, and demonstrates the approach with a ticket‑service case study using Spring Boot and Spring Cloud Stream.
This article explains multiple ways to achieve asynchronous processing in Spring Boot, covering @Async annotation, CompletableFuture, WebAsyncTask, DeferredResult, Tomcat connection tuning, component scanning, Undertow migration, BufferedWriter usage, and AsyncHandlerInterceptor with detailed code examples.
This article walks through Spring Boot's default error mapping, shows how to return JSON for AJAX requests and HTML pages for browsers, and provides step‑by‑step code for creating custom exception classes, an error response entity, a Freemarker error template, and a global @ControllerAdvice handler with detailed configuration and testing examples.
This article provides a step‑by‑step tutorial on installing and configuring Spring Boot Admin, including Maven dependencies, server and client setup, YML properties, security, Nacos registration, email notifications, custom health indicators, and Micrometer metrics to monitor Spring Boot services.
This article explains why Spring Boot was created, outlines its key features such as convention over configuration and automatic wiring, dives into the inner workings of annotations like @EnableAutoConfiguration, demonstrates how SpringFactoriesLoader implements SPI, and guides you through building a simple starter component step by step.
This article provides a comprehensive, step‑by‑step tutorial on Apollo—Ctrip's open‑source distributed configuration center—including its core concepts, features, four‑dimensional model, client design, high‑availability considerations, and detailed instructions for creating a Spring Boot demo project, configuring Maven and YAML files, writing controller and startup classes, setting JVM parameters, testing dynamic updates, exploring clusters and namespaces, and finally containerizing and deploying the application on Kubernetes.
This article demonstrates practical techniques for data masking, covering MySQL string functions for phone and ID masking, a Java library for various sensitive fields, and a MyBatis‑Mate extension that applies custom and built‑in masking strategies through annotations and REST endpoints.
This article demonstrates how to mask sensitive phone numbers and ID cards directly in MySQL, introduces a Java masking library, and provides a complete MyBatis‑Mate extension with custom strategies, configuration files, and sample Spring Boot code to protect personal data in applications.
Discover how to integrate the lightweight, high-performance Cache2k library into Spring Boot 2.7, explore benchmark results that surpass Ehcache3 and Caffeine, and learn basic and advanced configuration techniques—including custom builder settings and Micrometer metrics—for optimal in-memory caching.
This tutorial explains how to configure Spring Boot with a single DataSource, integrate MyBatis, and extend the setup to a dynamic multi‑DataSource using AbstractRoutingDataSource, custom annotations, and AOP, covering connection pool setup, property mapping, and transaction management.
Learn how to secure a Spring Boot service by limiting request frequency per IP and URL using a custom interceptor combined with Redis distributed locks, automatically blocking abusive IPs after a configurable number of hits within a set time window.
This guide explains how the Leaf distributed ID service, built with Spring Boot, supports segment and Snowflake modes, details its configuration, deployment steps, code examples, and operational considerations for high‑throughput backend systems.
Spring Security OAuth has reached end‑of‑life, with its documentation removed and code moved to a read‑only Spring attic repository; this guide explains how to detect deprecated dependencies, replace them with Spring Security 5.7’s OAuth2 Client, Resource Server, and the new Spring Authorization Server, ensuring a smooth migration to modern, supported authentication solutions.
This article introduces an open‑source distributed file system built with Spring Boot and Vue CLI, detailing its MIT licensing, UI layout, file operations, multiple upload methods, online preview and editing capabilities, storage options, and the underlying backend and frontend technologies.
This article explains how to deploy a CAS server, configure the cas-client dependency, set up Spring Boot annotations and cookie handling, share sessions across multiple services, and resolve cross‑origin and authentication redirects for a Vue front‑end separated from legacy JSP back‑ends.
