Freaks City

This project demonstrates how to integrate an object storage service with a Spring Boot application. We will use Alibaba Cloud OSS (Object Storage Service) as the example provider. First, insure you have created an OSS instance on Alibaba Cloud and obtained the access keys (Access Key ID and Access Key Secret). (Refer to the Alibaba Cloud docum ...

MyBatis-Plus streamliens service creation by extending the IService interface. Begin by declaring a role service contract: public interface ISysRoleService extends IService<SysRole> { } The default implemantation uses ServiceImpl, which handles dependency injection of the maper: @Service public class SysRoleService extends ServiceImpl&lt ...

Core Data Types in Redis 1. Strings Strings are the most basic data type — a key maps directly to a value. They can store text, numbers, or serialized objects. SET key value — Assign a value to a key. GET key — Retrieve the value associated with the key. SETEX key seconds value — Set a key with an expiration time in seconds. SETNX key value — ...

Introduction to Spring Security Spring Security provides comprehensive security services for Java EE applications. As a core component of the Spring ecosystem, it implements layered security architecture where each application layer can be protected independently. This framework enables fine-grained access control at the controller, service, an ...

Overview In enterprise-level Java applications, hardcoding cron expressions using the @Scheduled annotation is often inflexible, as updates require recompilation and redeployment. This guide demonstrates how to design a dynamic scheduling system where cron expressions and target execution methods are managed in a relational database. Database S ...

Background and Compatibility Users relying on the 1.0.0-M6 milestone release from Maven Central have reported various runtime exceptions and compatibility mismatches. To address this, the community starter spring-ai-hunyuan has been refactored to align with the official Spring AI 1.0.0 stable release. The updated source code is available here: ...

Server OS & Initial Setup When activating a new cloud server, choose between preconfigured application images or a clean Linux distribution. Familiar users should pick an image with JDK 11+, MySQL 8+, and an optional FTP/SFTP integration for a fast environment setup; avoid paid mirror options unless explicitly required. Those new to deploym ...

By default, Spring Boot applications are packaged as executable JARs with an embedded Tomcat server. While convenient for development and microservices, this approach has limitations in certain scenarios—particularly when dealing with file uploads that need to persist acrross application restarts. Since the embedded server starts fresh each tim ...

File Hashing Strategy To establish file uniqueness, implement an MD5 hash calculation using a sampling approach. This method processes the entire first and last chunks while sampling portions of intermediate chunks: async generateFileHash(chunks) { return new Promise(resolve => { const hasher = new SparkMD5.ArrayBuffer(); const sam ...

Given the widespread adoption of WeChat, the client side of this platform is developed as a WeChat Mini Program to align with real-world usage scenarios. 1. Implementing WeChat Login (Controller Layer) @PostMapping("/wechat-login") @ApiOperation("WeChat user authentication") public Result<AuthResponseVO> authenticate(@ ...