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Java Tech Enthusiast
Java Tech Enthusiast
Aug 3, 2024 · Fundamentals

Using Java 8 Functional Interfaces to Replace if...else Statements

Java 8’s functional interfaces, such as Supplier, Consumer, Runnable, and Function, let developers replace verbose if‑else chains with concise lambda‑based constructs, improving readability by encapsulating conditional logic in custom @FunctionalInterface definitions that handle true/false branches, exceptions, and optional values.

Functional InterfaceJavalambda
0 likes · 5 min read
Using Java 8 Functional Interfaces to Replace if...else Statements
Java Architect Essentials
Java Architect Essentials
Aug 2, 2024 · Databases

Migrating a SpringBoot + MyBatisPlus + MySQL Project to PostgreSQL: Common Pitfalls and Helper Scripts

This article details the step‑by‑step process of switching a SpringBoot‑MyBatisPlus application from MySQL to PostgreSQL, covering driver integration, JDBC configuration changes, numerous SQL and type‑conversion pitfalls, and provides ready‑to‑run PostgreSQL scripts for bulk column adjustments and default values.

JavaMySQLPostgreSQL
0 likes · 11 min read
Migrating a SpringBoot + MyBatisPlus + MySQL Project to PostgreSQL: Common Pitfalls and Helper Scripts
21CTO
21CTO
Aug 2, 2024 · Backend Development

Why Developers Are Ditching Oracle Java and How to Switch to OpenJDK

A market study reveals that rising Oracle Java subscription costs are driving many users to migrate to OpenJDK, and this guide explains the reasons behind the shift and provides step‑by‑step instructions for removing Oracle JDK and installing OpenJDK.

Backend DevelopmentJavaOpenJDK
0 likes · 6 min read
Why Developers Are Ditching Oracle Java and How to Switch to OpenJDK
Architect
Architect
Aug 2, 2024 · Artificial Intelligence

Building AI‑Native Applications with Spring AI: A Complete Tutorial

This article explains how to quickly develop an AI‑native application using Spring AI, covering core features such as chat models, prompt templates, function calling, structured output, image generation, embedding, vector stores, and Retrieval‑Augmented Generation (RAG), and provides end‑to‑end Java code examples for building a simple AI‑driven service.

AI-nativeBackendFunction Calling
0 likes · 40 min read
Building AI‑Native Applications with Spring AI: A Complete Tutorial
DaTaobao Tech
DaTaobao Tech
Aug 2, 2024 · Backend Development

Limitations of Spring AOP and Java Agent Solutions for the Diagnose Framework

Spring AOP cannot advise non‑bean, static, or internally‑called methods, limiting its use for the Diagnose framework, so the article proposes a Java Agent that transforms bytecode at startup, bypasses proxy constraints, and reliably intercepts private, static, and self‑invoked methods across separate class loaders.

ByteBuddyJavaJava Agent
0 likes · 13 min read
Limitations of Spring AOP and Java Agent Solutions for the Diagnose Framework
Top Architect
Top Architect
Aug 2, 2024 · Backend Development

JDFrame/SDFrame: A Semantic Java Stream DataFrame Library for Simplified Data Processing

This article introduces JDFrame/SDFrame, a JVM‑level DataFrame library that provides a more semantic and concise API for Java 8 stream operations, demonstrates how to add the Maven dependency, shows practical examples for filtering, grouping, sorting, joining, pagination, and explains the differences between the mutable JDFrame and the immutable SDFrame.

DataFrameJDFrameJava
0 likes · 16 min read
JDFrame/SDFrame: A Semantic Java Stream DataFrame Library for Simplified Data Processing
Top Architect
Top Architect
Aug 2, 2024 · Backend Development

14 Practical Tips for Optimizing Java Backend Code

This article presents fourteen actionable techniques for improving Java backend code quality, including using configuration files, Lombok's @RequiredArgsConstructor, modular design, exception handling, reducing unnecessary database calls, avoiding null returns, simplifying if‑else logic, minimizing controller logic, leveraging IDE features, reading source code, applying design patterns, embracing new knowledge, mastering fundamentals, and efficiently checking element existence, supplemented with concrete code examples.

JavaLombokSpring
0 likes · 9 min read
14 Practical Tips for Optimizing Java Backend Code
Java Tech Enthusiast
Java Tech Enthusiast
Aug 2, 2024 · Backend Development

How Cool Request’s New Trace Feature Lets You Measure Any Method’s Execution Time

The latest update of the Cool Request IDEA plugin introduces a powerful Trace function that automatically records execution times for any method—including Spring @Scheduled and xxl‑job tasks—offers customizable latency coloring, MyBatis SQL timing, call‑count indicators, and scriptable environment variables for seamless token handling and JSON parsing.

HTTP debuggingIDEA PluginJava
0 likes · 6 min read
How Cool Request’s New Trace Feature Lets You Measure Any Method’s Execution Time
Architecture Digest
Architecture Digest
Aug 2, 2024 · Backend Development

From Messy to Elegant: Refactoring Spring Boot Controllers with @Valid and Global Exception Handling

The article demonstrates how to transform overly complex Spring Boot controllers—filled with repetitive validation and business logic—into clean, maintainable code by using @Valid annotations, concise validation rules, and a centralized exception handler, effectively halving the code size and improving readability.

BackendControllerJava
0 likes · 9 min read
From Messy to Elegant: Refactoring Spring Boot Controllers with @Valid and Global Exception Handling
macrozheng
macrozheng
Aug 2, 2024 · Backend Development

How to Quickly Resolve Massive Kafka Message Backlog in Production

This guide explains why Kafka message backlogs occur, how to diagnose bugs, optimize consumer logic, and use temporary topics for emergency scaling, while emphasizing monitoring, alerts, and proper offset handling to keep your streaming system healthy.

BacklogConsumerJava
0 likes · 5 min read
How to Quickly Resolve Massive Kafka Message Backlog in Production
IT Architects Alliance
IT Architects Alliance
Aug 2, 2024 · Fundamentals

Mastering Design Patterns: Strategy, Factory, Singleton, Proxy, Observer, Template & Adapter in Java

This article provides a comprehensive, code‑first guide to the most common design patterns—including Strategy, Simple Factory, Singleton, Proxy, Factory Method, Observer, Template Method and Adapter—explaining their concepts, real‑world use cases, and complete Java implementations with Spring Boot integration.

AdapterDesign PatternsJava
0 likes · 21 min read
Mastering Design Patterns: Strategy, Factory, Singleton, Proxy, Observer, Template & Adapter in Java
JD Retail Technology
JD Retail Technology
Aug 2, 2024 · Operations

JVM Memory Model, Garbage Collection, and Optimization Guide

This article explains the JVM memory architecture, object lifecycle, young and old generation garbage‑collection mechanisms, tuning goals such as low latency, high throughput and large heap, and provides practical advice on monitoring, common memory‑related problems, and choosing appropriate collectors for different application scenarios.

JVMJavagarbage collection
0 likes · 17 min read
JVM Memory Model, Garbage Collection, and Optimization Guide
Java Backend Technology
Java Backend Technology
Aug 2, 2024 · Backend Development

Why SpringBoot @EnableScheduling Is Slow and How to Fix It

This article explains why SpringBoot's default @EnableScheduling runs tasks sequentially with noticeable delays, analyzes the underlying single‑threaded scheduler, and provides multiple solutions—including thread‑pool configuration, asynchronous execution, custom executors, and distributed locks—to achieve reliable and scalable scheduled jobs.

@AsyncDistributedLockJava
0 likes · 17 min read
Why SpringBoot @EnableScheduling Is Slow and How to Fix It
Code Ape Tech Column
Code Ape Tech Column
Aug 2, 2024 · Backend Development

Improving Spring MVC Controllers: Unified Response Structure, Validation, and Exception Handling

This article explains how to refactor Spring MVC controller layers by introducing a unified response wrapper, handling String conversion issues with ResponseBodyAdvice, applying JSR‑303 validation for request parameters, creating custom validation annotations, and implementing custom exceptions with a global exception handler to produce clean, maintainable backend code.

BackendControllerExceptionHandling
0 likes · 21 min read
Improving Spring MVC Controllers: Unified Response Structure, Validation, and Exception Handling
Top Architect
Top Architect
Aug 1, 2024 · Backend Development

Best Practices for Designing a Robust Controller Layer in Spring Backend Applications

This article explains how to build a clean, maintainable Controller layer in Spring by separating responsibilities, unifying response structures, applying global response wrapping, leveraging JSR‑303 validation for parameters, creating custom validation rules, and handling exceptions uniformly, all illustrated with practical Java code examples.

ControllerExceptionHandlingJava
0 likes · 18 min read
Best Practices for Designing a Robust Controller Layer in Spring Backend Applications
JD Tech
JD Tech
Aug 1, 2024 · Backend Development

Overview of RPC and How to Build a Custom RPC Framework Using Netty

This article explains the fundamentals and key characteristics of Remote Procedure Call (RPC), outlines common use cases and popular frameworks, and then walks through the design and implementation of a simple custom RPC system—including a bespoke binary protocol, client‑side proxy generation, serialization, Netty‑based encoding/decoding, server‑side request handling, and result delivery—using Java and Netty.

Backend DevelopmentJavaNetty
0 likes · 21 min read
Overview of RPC and How to Build a Custom RPC Framework Using Netty
Selected Java Interview Questions
Selected Java Interview Questions
Aug 1, 2024 · Backend Development

Spring Annotation-Based Development and MyBatis Integration Guide

This article explains how Spring 3.0's pure annotation development simplifies bean configuration, demonstrates defining beans with @Component, managing bean scopes, performing various injection techniques, reading properties files, and integrating MyBatis, providing complete code examples and best‑practice tips for backend Java developers.

BackendDependency InjectionJava
0 likes · 11 min read
Spring Annotation-Based Development and MyBatis Integration Guide
Architect
Architect
Jul 31, 2024 · Backend Development

Mastering WebSocket Integration in Spring Boot: Javax, WebMVC, WebFlux, and More

This article walks through the author's practical research on integrating WebSocket in Spring Boot, detailing step‑by‑step configurations for Javax, WebMVC, and WebFlux, comparing their APIs, highlighting pitfalls, and providing concrete code snippets and cold‑knowledge tips for both server and client implementations.

BackendJavaSpring Boot
0 likes · 19 min read
Mastering WebSocket Integration in Spring Boot: Javax, WebMVC, WebFlux, and More
DaTaobao Tech
DaTaobao Tech
Jul 31, 2024 · Fundamentals

A Java-Based Scenario Execution Framework Using Design Patterns

The article presents a Java‑based scenario execution framework that leverages design patterns, annotations, enums and a generic factory to replace repetitive if/else branches with abstract scene interfaces and concrete implementations, enabling developers to add new business cases by simply creating a class and enum constant while the infrastructure automatically discovers and wires it, improving extensibility, readability and code quality.

Design PatternsFactory PatternJava
0 likes · 13 min read
A Java-Based Scenario Execution Framework Using Design Patterns
Zhuanzhuan Tech
Zhuanzhuan Tech
Jul 31, 2024 · Backend Development

HTTP Retry Strategies for Offline Store Systems: Simple Loop, Apache HttpClient, and Asynchronous MQ-Based Retries

This article examines the need for reliable HTTP retries in offline store applications, evaluates simple loop retries, explores Apache HttpClient's built‑in retry mechanism, and proposes a hybrid solution that combines customized HttpClient retry handling with asynchronous message‑queue retries to achieve high availability and eventual consistency.

Apache HttpClientHTTPJava
0 likes · 11 min read
HTTP Retry Strategies for Offline Store Systems: Simple Loop, Apache HttpClient, and Asynchronous MQ-Based Retries
Selected Java Interview Questions
Selected Java Interview Questions
Jul 31, 2024 · Backend Development

Resolving Lombok @Data and @Builder Conflict: Restoring the No‑Args Constructor

This article explains why combining Lombok's @Data and @Builder annotations can remove the automatically generated no‑args constructor, demonstrates the resulting compilation errors, and provides two practical solutions using @Tolerate or a combination of @RequiredArgsConstructor and @NoArgsConstructor, while also describing Lombok's annotation‑processing mechanism.

BackendBuilderJava
0 likes · 4 min read
Resolving Lombok @Data and @Builder Conflict: Restoring the No‑Args Constructor
Code Ape Tech Column
Code Ape Tech Column
Jul 31, 2024 · Information Security

Designing User Authentication in Microservice Architecture with JWT and Spring Cloud Gateway

This article explains traditional session‑based authentication, introduces JWT and JJWT usage with Java code examples, and compares two microservice authentication designs—service‑side verification and API‑gateway unified verification—while discussing their trade‑offs, challenges, and practical implementation tips.

JWTJavaauthentication
0 likes · 15 min read
Designing User Authentication in Microservice Architecture with JWT and Spring Cloud Gateway
Architecture Digest
Architecture Digest
Jul 30, 2024 · Fundamentals

Understanding the Chain of Responsibility Design Pattern with Java Examples

This article explains the Chain of Responsibility design pattern, its typical use cases, demonstrates a flawed nested‑if implementation for a multi‑level game, and then shows step‑by‑step refactorings—including an abstract handler, concrete handlers, and a factory‑based dynamic chain—using Java code examples.

Chain of ResponsibilityDesign PatternJava
0 likes · 10 min read
Understanding the Chain of Responsibility Design Pattern with Java Examples
Top Architect
Top Architect
Jul 30, 2024 · Information Security

Understanding RBAC and Implementing Spring Security with JWT in Java

This article explains the concepts and models of Role‑Based Access Control (RBAC), demonstrates how to configure Spring Security for in‑memory and JWT‑based authentication, and provides complete Java code examples for permissions, user groups, password encryption, and custom login filters.

Access ControlJWTJava
0 likes · 18 min read
Understanding RBAC and Implementing Spring Security with JWT in Java
Java Backend Technology
Java Backend Technology
Jul 30, 2024 · Backend Development

Spring Annotation Development: From Bean Definition to MyBatis Integration

This article explains how Spring’s pure annotation development replaces XML bean definitions, covers component scanning, bean scopes, derived annotations, various injection methods, property file loading, and demonstrates seamless Spring‑MyBatis integration, showing step‑by‑step code examples that simplify backend configuration.

Dependency InjectionJavaMyBatis
0 likes · 9 min read
Spring Annotation Development: From Bean Definition to MyBatis Integration
Programmer XiaoFu
Programmer XiaoFu
Jul 30, 2024 · Fundamentals

Why Deleting or Adding Entries During a HashMap foreach Loop Triggers ConcurrentModificationException

The article explains why modifying a HashMap—by removing, adding, or putting entries—while iterating with a Java foreach loop causes a ConcurrentModificationException, demonstrates the underlying bytecode transformation, and shows how to safely perform such operations using an Iterator.

CollectionsConcurrentModificationExceptionHashMap
0 likes · 12 min read
Why Deleting or Adding Entries During a HashMap foreach Loop Triggers ConcurrentModificationException
Java Architect Essentials
Java Architect Essentials
Jul 29, 2024 · Backend Development

Optimizing a High‑Concurrency Interface: Reducing Response Time from 30 seconds to 0.8 seconds

This article presents a real‑world case study of a high‑concurrency transaction‑statistics API that originally took 30 seconds to respond, detailing problem diagnosis, SQL and Java code analysis, and a series of optimizations—including SQL rewrites, database‑side calculations, and Caffeine caching—that ultimately brought the response time below one second.

JavaPostgreSQLSQL optimization
0 likes · 10 min read
Optimizing a High‑Concurrency Interface: Reducing Response Time from 30 seconds to 0.8 seconds
Top Architect
Top Architect
Jul 29, 2024 · Backend Development

Design Principles and Module Structure for a Spring Boot Backend Project (XiaoLe)

This article outlines essential backend design principles such as single responsibility, high cohesion, low coupling, reusability, clear boundaries, moderate modularity, layered architecture, dependency inversion, testability and future adaptability, and demonstrates their application in a multi‑module Spring Boot project with detailed Maven configurations.

JavaMavenModule Design
0 likes · 23 min read
Design Principles and Module Structure for a Spring Boot Backend Project (XiaoLe)
Top Architect
Top Architect
Jul 29, 2024 · Databases

Implementing Online User Counting with Redis Sorted Sets (ZSET)

This article explains how to build an online user counting feature using Redis sorted sets (ZSET) by detailing the core commands (zadd, zrangeByScore, zremrangeByScore, zrem), user identification methods, and providing Java and JavaScript code examples, while also noting unrelated promotional content at the end.

JavaRedisZset
0 likes · 8 min read
Implementing Online User Counting with Redis Sorted Sets (ZSET)
Selected Java Interview Questions
Selected Java Interview Questions
Jul 29, 2024 · Fundamentals

Comprehensive Guide to TreeUtil: Building, Traversing, Flattening, and Sorting Tree Structures in Java

This article introduces a versatile Java TreeUtil class that demonstrates how to construct hierarchical tree structures from flat lists, perform pre-order, level-order, and post-order traversals, flatten trees back to lists, and sort nodes using generic functional interfaces, with detailed code examples.

DataStructureJavaUtility
0 likes · 16 min read
Comprehensive Guide to TreeUtil: Building, Traversing, Flattening, and Sorting Tree Structures in Java
IT Architects Alliance
IT Architects Alliance
Jul 29, 2024 · Fundamentals

Understanding Java BigDecimal: Overview, Constructors, Methods, Formatting, and Common Issues

This article explains Java's BigDecimal class, covering its purpose for high‑precision arithmetic, common constructors, essential methods such as add, subtract, multiply, divide, comparison, formatting with NumberFormat, handling of division exceptions, and provides a utility class with static arithmetic operations for accurate calculations.

ArithmeticBigDecimalException
0 likes · 15 min read
Understanding Java BigDecimal: Overview, Constructors, Methods, Formatting, and Common Issues
Wukong Talks Architecture
Wukong Talks Architecture
Jul 29, 2024 · Backend Development

Understanding the Java Stream Pipeline: Implementation Principles and Execution Process

This article explains the internal workings of Java's Stream API pipeline, covering how intermediate and terminal operations are recorded, combined, and executed via stages and Sink interfaces, illustrating lazy evaluation, stateful vs stateless operations, and the mechanisms behind parallel and sequential processing.

Intermediate OperationsJavaSink
0 likes · 21 min read
Understanding the Java Stream Pipeline: Implementation Principles and Execution Process
Code Ape Tech Column
Code Ape Tech Column
Jul 29, 2024 · Backend Development

Using Caffeine Cache in Spring Boot: Features, Algorithms, and Configuration

This article introduces Caffeine Cache, explains its W‑TinyLFU algorithm advantages over traditional FIFO, LRU, and LFU strategies, demonstrates manual, synchronous, and asynchronous loading methods, covers eviction policies, statistics, Spring Boot integration, and provides detailed configuration and code examples for Java developers.

Cache ConfigurationCaffeine CacheJava
0 likes · 30 min read
Using Caffeine Cache in Spring Boot: Features, Algorithms, and Configuration
Top Architect
Top Architect
Jul 27, 2024 · Backend Development

Various Ways to Iterate Over a Java HashMap with Code Examples

This article demonstrates seven common techniques for iterating over a Java HashMap—including iterator, entrySet, keySet, for‑each loops, lambda expressions, and both single‑threaded and parallel Streams API—providing concise code examples and performance notes for each method.

Code ExampleHashMapJava
0 likes · 10 min read
Various Ways to Iterate Over a Java HashMap with Code Examples
Rare Earth Juejin Tech Community
Rare Earth Juejin Tech Community
Jul 27, 2024 · Backend Development

Refactoring a Billing Service with a Responsibility‑Chain Architecture for Better Extensibility

The article explains why a complex billing module in a settlement system needs optimization, describes the problems of monolithic code and tangled responsibilities, and demonstrates a refactor using the responsibility‑chain pattern with clear, pluggable nodes, accompanied by Java code examples and best‑practice recommendations.

BackendDesign PatternsJava
0 likes · 12 min read
Refactoring a Billing Service with a Responsibility‑Chain Architecture for Better Extensibility
Selected Java Interview Questions
Selected Java Interview Questions
Jul 26, 2024 · Backend Development

Zero‑Downtime SpringBoot Port Sharing: Running Two Instances on the Same Port

This article explains how to achieve seamless code updates for SpringBoot applications by allowing two instances to share the same port, detailing the underlying Tomcat embedding mechanism, DispatcherServlet handling, and providing a complete Java implementation with step‑by‑step instructions and test results.

BackendJavaPort Sharing
0 likes · 7 min read
Zero‑Downtime SpringBoot Port Sharing: Running Two Instances on the Same Port
IT Architects Alliance
IT Architects Alliance
Jul 26, 2024 · Information Security

Unveiling Spring Security 6: Architecture, Filters, and Authentication Deep Dive

This article provides a comprehensive analysis of Spring Security 6's architecture, explaining how the framework uses a chain of servlet Filters, the DelegatingFilterProxy, and the SecurityFilterChain to implement authentication, authorization, and protection against common attacks, while also offering practical debugging tips and configuration guidance.

AuthorizationFilter ChainJava
0 likes · 32 min read
Unveiling Spring Security 6: Architecture, Filters, and Authentication Deep Dive
Java Interview Crash Guide
Java Interview Crash Guide
Jul 25, 2024 · Backend Development

Why MapStruct Beats Manual Bean Copying in Java: Performance, Type Safety, and Advanced Features

This article explains the drawbacks of manual property copying and traditional bean utilities, introduces MapStruct as a compile‑time, high‑performance mapper with type‑safety, deep‑copy support, collection handling, and customizable field‑ignoring, and shows practical Maven and Lombok integration examples.

Bean CopyJavaMapStruct
0 likes · 13 min read
Why MapStruct Beats Manual Bean Copying in Java: Performance, Type Safety, and Advanced Features
JD Cloud Developers
JD Cloud Developers
Jul 25, 2024 · Fundamentals

Master Defensive Programming: Strategies to Build Robust Software

Defensive programming is a proactive coding paradigm that anticipates errors and exceptions, emphasizing input validation, error isolation, assertions, thorough testing, and clear error handling, with practical examples ranging from pagination parameter checks to loop safeguards, illustrating how to enhance software robustness and stability.

JavaSoftware Robustnessdefensive programming
0 likes · 16 min read
Master Defensive Programming: Strategies to Build Robust Software
Eric Tech Circle
Eric Tech Circle
Jul 24, 2024 · Backend Development

Designing Secure Microservice Authentication with Spring Boot 3 and OAuth2

This article explains the key changes in Spring Boot 3, outlines the new OAuth2 components, and provides a detailed design for secure microservice authentication and authorization using Spring Authorization Server, JWT, API Gateway, and client applications, complete with architecture diagrams and implementation steps.

AuthorizationBackendJava
0 likes · 9 min read
Designing Secure Microservice Authentication with Spring Boot 3 and OAuth2
vivo Internet Technology
vivo Internet Technology
Jul 24, 2024 · Backend Development

Design and Implementation of a Visual Monitoring System for Caffeine Cache

The article presents a visual monitoring system for the Caffeine Java cache that adds instance naming, memory‑usage estimation, dynamic size and expiration configuration, real‑time statistics and data queries, and a Jetty‑based HTTP control panel, enabling global cache management, trend charts, and on‑the‑fly cache invalidation.

Caffeine CacheJavaPerformance Monitoring
0 likes · 15 min read
Design and Implementation of a Visual Monitoring System for Caffeine Cache
Zhuanzhuan Tech
Zhuanzhuan Tech
Jul 24, 2024 · Backend Development

Applying MVEL Expression Engine for Business Indicator Calculations: Design, Performance Comparison, and Migration Strategy

This article examines the challenges of scaling store settlement calculations, evaluates several Java expression engines, selects MVEL for its performance and community support, and details the architectural redesign, database schema, caching strategy, and step‑by‑step migration process for integrating the engine into a backend system.

Expression EngineJavaMVEL
0 likes · 14 min read
Applying MVEL Expression Engine for Business Indicator Calculations: Design, Performance Comparison, and Migration Strategy
Top Architect
Top Architect
Jul 24, 2024 · Information Security

Understanding Session and Token-Based Authentication with JWT in Web Applications

The article explains how HTTP’s stateless nature requires session or token mechanisms for preserving user state, compares session‑based and JWT token authentication, details JWT structure, and provides Java code examples for generating, verifying, and extracting token information, while also promoting related services.

JWTJavaSession
0 likes · 10 min read
Understanding Session and Token-Based Authentication with JWT in Web Applications
Code Ape Tech Column
Code Ape Tech Column
Jul 24, 2024 · Backend Development

Understanding and Implementing Java SPI and Spring SPI

This article explains Java's built‑in Service Provider Interface (SPI) mechanism, demonstrates how to create interfaces, implementations, and configuration files, shows testing with ServiceLoader, and compares it to Spring's SPI implementation using spring.factories, including code examples and analysis of their advantages and limitations.

BackendJavaSPI
0 likes · 7 min read
Understanding and Implementing Java SPI and Spring SPI
Top Architect
Top Architect
Jul 23, 2024 · Backend Development

How to Install and Use the CheckStyle Plugin in IntelliJ IDEA

This article explains how to install the CheckStyle plugin in IntelliJ IDEA, configure it with custom rule sets such as Alibaba's, run checks on Java code, and troubleshoot common issues like missing annotations, spacing, naming, formatting, and import order, while also noting related promotional content.

Backend DevelopmentIntelliJ IDEAJava
0 likes · 6 min read
How to Install and Use the CheckStyle Plugin in IntelliJ IDEA
Selected Java Interview Questions
Selected Java Interview Questions
Jul 23, 2024 · Backend Development

Integrating URule Rule Engine into Java Projects: Installation, Configuration, and Sample Code

This article explains the background, features, installation steps, core concepts, library definitions, rule set creation (wizard and script), decision tables, practical usage scenarios, and provides complete Java and configuration code examples for integrating the URule rule engine in a Spring Boot backend application.

BackendConfigurationJava
0 likes · 15 min read
Integrating URule Rule Engine into Java Projects: Installation, Configuration, and Sample Code
macrozheng
macrozheng
Jul 23, 2024 · Fundamentals

Mastering Java Optional: Eliminate NullPointerExceptions with Clean Code

This article explains why NullPointerExceptions occur, introduces Java's Optional as a concise alternative to explicit null checks, demonstrates practical code transformations, and reviews all core Optional methods introduced in JDK 8 to improve readability and safety of Java applications.

CodeCleanlinessJavaJava8
0 likes · 10 min read
Mastering Java Optional: Eliminate NullPointerExceptions with Clean Code
Java Architect Essentials
Java Architect Essentials
Jul 23, 2024 · Cloud Native

Guide to Installing and Using MinIO with Spring Boot and Docker

This article provides a comprehensive guide to installing MinIO on CentOS 7, configuring it with Docker, integrating it into a Spring Boot application, and implementing file upload, download, and multipart upload features using MinIO's Java SDK, along with troubleshooting tips and code examples.

DockerJavaObject Storage
0 likes · 23 min read
Guide to Installing and Using MinIO with Spring Boot and Docker
Architect
Architect
Jul 22, 2024 · Fundamentals

Understanding and Using Java BigDecimal for Precise Arithmetic

This article introduces Java's BigDecimal class, explains its purpose for high-precision arithmetic beyond double's limits, details constructors, common methods, formatting, comparison, and exception handling, and provides practical code examples and a utility class for accurate mathematical operations.

ArithmeticBigDecimalJava
0 likes · 15 min read
Understanding and Using Java BigDecimal for Precise Arithmetic
Sanyou's Java Diary
Sanyou's Java Diary
Jul 22, 2024 · Backend Development

Why Does My ThreadPool Freeze? Uncovering the Hidden Deadlock Pitfall

This article explains a subtle thread‑pool deadlock caused by parent‑child task interactions, demonstrates the issue with a reproducible demo, analyzes why the latch logic fails, and provides a practical solution of isolating thread pools to avoid false‑deadlock behavior in microservices.

CountDownLatchJavaMicroservices
0 likes · 11 min read
Why Does My ThreadPool Freeze? Uncovering the Hidden Deadlock Pitfall
DaTaobao Tech
DaTaobao Tech
Jul 22, 2024 · Backend Development

Spring Bean Injection Issues and Dependency Injection Priorities

In a project with two applications, a Tair bean defined via JavaConfig works in one app but fails in the other because Spring’s injection rules prioritize type over name, causing ambiguity; using explicit bean naming with XML, adding @Qualifier, or switching to @Resource resolves the issue.

Bean ConfigurationDependency InjectionJava
0 likes · 12 min read
Spring Bean Injection Issues and Dependency Injection Priorities
JD Cloud Developers
JD Cloud Developers
Jul 22, 2024 · Backend Development

Building a Custom RPC Framework with Netty: A Step‑by‑Step Guide

This article introduces the fundamentals and key features of Remote Procedure Call (RPC), explores common use cases and popular frameworks, then walks through the design and implementation of a custom RPC system using Netty, covering protocol design, client‑server communication, serialization, encoding, decoding, and result handling.

JavaNettyRPC
0 likes · 23 min read
Building a Custom RPC Framework with Netty: A Step‑by‑Step Guide
Selected Java Interview Questions
Selected Java Interview Questions
Jul 22, 2024 · Backend Development

Using a Database as a Central Configuration Center in SpringBoot

This article analyzes the problems of scattered property configuration in SpringBoot projects, designs a database table to store configuration items, implements a configuration loader that injects database values into the Spring environment, and demonstrates testing and best‑practice considerations for a robust backend configuration solution.

BackendConfigurationJava
0 likes · 11 min read
Using a Database as a Central Configuration Center in SpringBoot
macrozheng
macrozheng
Jul 22, 2024 · Backend Development

Mastering MapStruct: Boost Java Object Mapping Beyond BeanUtils

MapStruct is a powerful Java annotation‑based mapper that outperforms BeanUtils by generating compile‑time mapping implementations without reflection, supporting simple, nested, collection, and custom mappings, dependency injection, constants, expressions, and error handling, making object‑DTO conversions efficient and maintainable in Spring Boot projects.

JavaMavenObject Mapping
0 likes · 19 min read
Mastering MapStruct: Boost Java Object Mapping Beyond BeanUtils
Architect's Tech Stack
Architect's Tech Stack
Jul 22, 2024 · Backend Development

Using MapStruct for Efficient Bean Copying in Java

This article explains why manual property copying in layered Java applications is inefficient, compares runtime copiers like BeanUtils and BeanCopier, and demonstrates how MapStruct provides compile‑time, type‑safe, high‑performance bean mapping with support for deep copy, collection mapping, field ignoring, and Lombok integration.

Backend DevelopmentCode GenerationJava
0 likes · 10 min read
Using MapStruct for Efficient Bean Copying in Java
Su San Talks Tech
Su San Talks Tech
Jul 21, 2024 · Backend Development

8 Effective Retry Strategies for Java APIs

This article presents eight practical retry mechanisms for Java applications—including loop, recursion, HttpClient configuration, Spring Retry, Resilience4j, custom utilities, asynchronous thread‑pool retries, and message‑queue based retries—along with code examples, configuration snippets, and best‑practice guidelines to help developers handle transient network failures reliably.

HttpClientJavaResilience4j
0 likes · 17 min read
8 Effective Retry Strategies for Java APIs
Top Architect
Top Architect
Jul 20, 2024 · Backend Development

Understanding ForkJoinPool: Theory, Implementation, and Performance in Java

This article explains the limitations of ThreadPoolExecutor, introduces the Fork/Join model and ForkJoinPool in Java, demonstrates how to implement custom RecursiveTask and RecursiveAction classes with code examples, discusses pool construction, task submission, work‑stealing, monitoring methods, performance testing, and cautions about using the common pool.

ForkJoinPoolJavaThreadPool
0 likes · 29 min read
Understanding ForkJoinPool: Theory, Implementation, and Performance in Java
Top Architect
Top Architect
Jul 20, 2024 · Backend Development

Spring Framework Utility Classes Overview and Usage

This article presents a comprehensive guide to Spring's core utility classes—including Assert, ObjectUtils, StringUtils, CollectionUtils, FileCopyUtils, ResourceUtils, StreamUtils, ReflectionUtils, and AopUtils—showing their purpose, typical use‑cases, and code examples, while also containing promotional material for related services.

CodeExamplesJavaReflection
0 likes · 13 min read
Spring Framework Utility Classes Overview and Usage
Selected Java Interview Questions
Selected Java Interview Questions
Jul 20, 2024 · Backend Development

Introduction and Usage Guide for MyBatis-Mate: Enterprise Features for MyBatis-Plus

This article introduces MyBatis-Mate, an official MyBatis‑Plus extension offering enterprise‑level capabilities such as dictionary binding, field encryption, data masking, dynamic DDL maintenance, sharding, multi‑datasource switching, performance logging, and data permission control, with detailed Spring Boot integration examples.

BackendJavaMyBatis
0 likes · 15 min read
Introduction and Usage Guide for MyBatis-Mate: Enterprise Features for MyBatis-Plus
Architect's Guide
Architect's Guide
Jul 20, 2024 · Backend Development

Spring Controller Scope: Singleton vs Prototype and Concurrency Safety

The article explains that Spring MVC controllers are singleton by default, which makes mutable instance fields unsafe for concurrent requests, demonstrates the issue with sample code, and shows how applying @Scope("prototype") or using ThreadLocal resolves the thread‑safety problem.

JavaSpringconcurrency
0 likes · 4 min read
Spring Controller Scope: Singleton vs Prototype and Concurrency Safety
IT Services Circle
IT Services Circle
Jul 19, 2024 · Backend Development

Comprehensive Backend Interview Guide: MySQL Indexes, Redis Architecture, Java SpringBoot Auto‑Configuration, and JVM Memory Management

This article provides an in-depth overview of common backend interview topics, covering MySQL index structures and storage engines, Redis single‑threaded design and persistence mechanisms, Java transaction ACID properties, SpringBoot auto‑configuration principles, JVM memory regions, class loading, and garbage‑collection algorithms, all illustrated with code examples.

JVMJavaMySQL
0 likes · 40 min read
Comprehensive Backend Interview Guide: MySQL Indexes, Redis Architecture, Java SpringBoot Auto‑Configuration, and JVM Memory Management
Alibaba Cloud Native
Alibaba Cloud Native
Jul 19, 2024 · Cloud Native

Implement Distributed Scheduled Tasks with Spring Cloud Alibaba SchedulerX

This guide explains why traditional Java timers fail in microservice clusters, introduces Spring Cloud Alibaba's SchedulerX module with high‑availability and lock features, and provides step‑by‑step Maven setup, configuration, and code examples for both Alibaba SchedulerX and the open‑source ShedLock approach.

JavaMicroservicesSchedulerX
0 likes · 10 min read
Implement Distributed Scheduled Tasks with Spring Cloud Alibaba SchedulerX
macrozheng
macrozheng
Jul 19, 2024 · Backend Development

Master Java Obfuscation: 5 Crazy Tricks to Write Unreadable Code

This article reveals five advanced Java tricks—using Unicode escapes in comments, over‑complicating simple logic with bitwise shifts, tampering with Boolean.TRUE via reflection, forcing both branches of an if‑else to run, and leveraging the Unsafe class for low‑level memory manipulation—to deliberately make code hard to understand.

JavaReflectionUnicode
0 likes · 12 min read
Master Java Obfuscation: 5 Crazy Tricks to Write Unreadable Code
Code Ape Tech Column
Code Ape Tech Column
Jul 19, 2024 · Backend Development

Common Pitfalls and Best Practices for Using Java Thread Pools

This article summarizes the common pitfalls, monitoring techniques, configuration guidelines, naming conventions, and practical code examples for safely using Java ThreadPoolExecutor, helping developers avoid OOM, deadlocks, and performance issues while optimizing thread‑pool usage.

BestPracticesJavaThreadPool
0 likes · 17 min read
Common Pitfalls and Best Practices for Using Java Thread Pools
Java Architect Essentials
Java Architect Essentials
Jul 19, 2024 · Backend Development

Unified TreeNode Utility Class for Multi‑Level Menus, Comments, Departments, and Categories in SpringBoot

This article explains how to create a unified SpringBoot utility class that builds hierarchical structures such as multi‑level menus, comments, departments, and categories, discusses database design choices like the optional tree_path field, provides a detailed ITreeNode interface, implementation of TreeNodeUtil with code examples, and demonstrates testing and filtering scenarios.

Backend DevelopmentJavaMulti-level Menu
0 likes · 12 min read
Unified TreeNode Utility Class for Multi‑Level Menus, Comments, Departments, and Categories in SpringBoot
IT Services Circle
IT Services Circle
Jul 18, 2024 · Artificial Intelligence

Insights on Baidu’s “Robo Fast Run” Autonomous Driving Initiative and Related Career Opportunities

The article discusses Baidu’s new autonomous‑driving service “Robo Fast Run,” its potential impact on ride‑hailing jobs, the technical challenges involved, and provides detailed guidance on the qualifications and learning paths for engineers seeking positions in Baidu’s intelligent‑driving divisions.

AIBaiduJava
0 likes · 5 min read
Insights on Baidu’s “Robo Fast Run” Autonomous Driving Initiative and Related Career Opportunities
Selected Java Interview Questions
Selected Java Interview Questions
Jul 18, 2024 · Backend Development

Exploring Nine Design Patterns in MyBatis: Builder, Factory, Singleton, Proxy, Decorator, Adapter, Composite, Template Method, and Iterator

This article examines nine design patterns employed within MyBatis—Builder, Factory, Singleton, Proxy, Decorator, Adapter, Composite, Template Method, and Iterator—detailing their roles, source code examples, and how they facilitate configuration parsing, SQL execution, and caching in the framework.

Builder PatternDesign PatternsFactory Pattern
0 likes · 18 min read
Exploring Nine Design Patterns in MyBatis: Builder, Factory, Singleton, Proxy, Decorator, Adapter, Composite, Template Method, and Iterator
Java Backend Technology
Java Backend Technology
Jul 18, 2024 · Databases

How to Accurately Track Online Users with Redis Sorted Sets

This guide explains how to implement an online user counting feature using Redis sorted sets, covering user identification methods, the essential zadd, zrangeByScore, zremrangeByScore, and zrem commands, along with code examples and a concise summary of the overall approach.

JavaRedisSorted Set
0 likes · 7 min read
How to Accurately Track Online Users with Redis Sorted Sets
Spring Full-Stack Practical Cases
Spring Full-Stack Practical Cases
Jul 18, 2024 · Backend Development

6 Proven Strategies to Eliminate if‑else in Spring Boot Projects

This article explains why excessive if‑else statements hurt Spring Boot code and presents six practical techniques—including strategy pattern, enums, polymorphism, lambda expressions, command pattern, and guard clauses—along with complete Java examples to make your backend more modular, readable, and maintainable.

BackendJavadesign-patterns
0 likes · 10 min read
6 Proven Strategies to Eliminate if‑else in Spring Boot Projects
Sohu Tech Products
Sohu Tech Products
Jul 17, 2024 · Backend Development

Java Thread Pool: Working Mechanism, States, and Rejection Policies

Java thread pools efficiently manage and reuse threads by applying a producer‑consumer model, transitioning through RUNNING, SHUTDOWN, STOP, and TERMINATED states, handling task queues, and employing configurable rejection policies such as Abort, CallerRuns, Discard, and DiscardOldest, while improving performance, resource utilization, and stability across web servers, asynchronous processing, and other concurrent workloads, distinct from connection pools which manage database connections.

JavaJava concurrencyPerformance Optimization
0 likes · 12 min read
Java Thread Pool: Working Mechanism, States, and Rejection Policies
DeWu Technology
DeWu Technology
Jul 17, 2024 · Backend Development

BPMN Overview and SmartEngine Implementation for Workflow Optimization

Covering workflow history, this article explains BPMN standards, outlines core modeling concepts, and demonstrates a practical SmartEngine integration that deploys BPMN 2.0 XML, highlights visual execution benefits, notes limitations in error handling and concurrency, and advises its use for moderately complex, frequently changing processes.

BPMNJavaSQL
0 likes · 24 min read
BPMN Overview and SmartEngine Implementation for Workflow Optimization
ITPUB
ITPUB
Jul 17, 2024 · Backend Development

10 Proven Techniques to Slash Java Bugs and Boost Code Quality

This guide presents ten practical strategies—including IDE selection, static analysis tools, unit testing, code reviews, and learning from others' post‑mortems—to help developers dramatically reduce bugs, improve code quality, and increase overall productivity.

Javabug reductioncode quality
0 likes · 10 min read
10 Proven Techniques to Slash Java Bugs and Boost Code Quality
Top Architect
Top Architect
Jul 17, 2024 · Backend Development

Integrating Spring Boot with XXL‑Job for Distributed Task Scheduling

This article provides a step‑by‑step guide on combining Spring Boot with the open‑source XXL‑Job platform, covering its features, comparison with other schedulers, configuration of the admin console and executor, code examples, @XxlJob annotation parameters, and best practices for reliable distributed task management.

JavaSpring BootXXL-JOB
0 likes · 17 min read
Integrating Spring Boot with XXL‑Job for Distributed Task Scheduling