Freaks City

User Table Structure The original table structure is designed as follows. Due to the large user base, database sharding becomes necessary. Sharding Strategy Design Based on the system design assumptions, the 12306 system needs to support approximately 1 billion registered users, with roughly 10 million new users annually. Before implementing da ...

Global exception handling in Spring Boot allows centralized management of errors across the application layer. The typical implementation involves a configuration class annotated with @ControllerAdvice, where methods are marked using @ExceptionHandler to specify target error types. @Component @Order(2) public class GlobalErrorConfig { @Exc ...

Introduction This cinema ticket booking system is built using Java with the SSM framework and JSP technology. The system provides comprehensive functionality for managing movie screenings, ticket sales, and user accounts. System Architecture Backend Framework SpringBoot Spring Boot serves as the foundation for building stand-alone, production-r ...

Before diving into the code, ensure your Elasticsearch server is running. Open a terminal and execute the elasticsearch command to start the server. Understanding the Two REST Client Types Elasticsearch provides two distinct REST client implementations: High-Level REST Client (RestHighLevelClient): This wrapper handles serialization and deseria ...

Overview Aspect-Oriented Programming enables modular handling of cross-cutting concerns. This guide demonstrates implementing automatic encryption and decryption for controller layer data using Spring Boot AOP, allowing business logic to remain clean while security concerns are handled transparently. Core Concepts AOP terminology includes: Asp ...

When implementing form-based authentication in Spring Security, it's essential to provide meaningful feedback to users upon login failure. By default, Spring Security stores the AuthenticationException in the request scope before forwarding to the configured failure URL. This enables custom error handling logic in the controller. Security Confi ...

Parameter validation represents a fundamental aspect of building robust applications. Proper validation ensures that your code handles unexpected inputs gracefully, preventing runtime exceptions and maintaining system stability. When combined with internationalization capabilities, validation errors can communicate effectively with users across ...

JSON Web Tokens consist of three distinct segments: a header defining cryptographic parameters, a payload carrying assertions, and a signature ensuring integrity. Implementing token validation in a Spring ecosystem requires orchestrating token generation, externalized configuration, request interception, and MVC registration. The following guid ...

Project Configuration Gradle Build Setup plugins { id 'java' id 'org.springframework.boot' id 'io.spring.dependency-management' } group = 'com.example' version = '1.0.0' java { sourceCompatibility = JavaVersion.VERSION_17 } repositories { mavenCentral() } dependencies { implementation 'org.springframework.boot:spring ...

Resolving PageHelper Integration Issues When integrating pagination using PageHelper in a Spring project, a compatibility issue may arise between different library versions. The error manifests as a NoSuchMethodError related to MyBatis reflection utilities. The root cause typically involves version mismatches between PageHelper and MyBatis. To ...