バックエンド開発
Node.js、NestJS、Spring Boot、Pythonバックエンド、ソケット、Nginx、決済連携などのサーバーサイド開発。
Exercise 3: File Transfer Application
Build a file transfer server and client that can reliably transfer files over TCP, handling large files and showing progress.
記事を読む →Exercise 4: Simple HTTP Server
Build a minimal HTTP/1.0 server that can serve static files and handle basic HTTP requests.
記事を読む →Nonblocking I/O
Nonblocking I/O allows sockets to perform operations without waiting. This is essential for handling multiple connections efficiently in a single thread.
記事を読む →Socket Security Fundamentals
Security is critical in network programming. This module covers fundamental security concepts and practices for socket applications.
記事を読む →How HTTPS Talks: Client and Server Communication
HTTPS is HTTP over TLS Transport Layer Security. The application data HTTP is unchanged; the difference is that it is sent over an encrypted, authenticated channel. This module explains how that channel is set up and how
記事を読む →Socket Programming Quick Reference
A quick reference guide for common socket programming tasks and patterns.
記事を読む →Socket Programming Comprehensive Teaching Materials
A complete educational resource for learning socket programming from fundamentals to advanced topics.
記事を読む →C Socket Examples
Minimal TCP, UDP, and HTTPS client examples matching the Python versions in ../python/.
記事を読む →Spring Boot Teaching Materials — Beginner to Expert
Comprehensive, classroomready materials for teaching Spring Boothttps://spring.io/projects/springboot from absolute beginners to advanced practitioners. Includes written modules and runnable code.
記事を読む →Spring Boot Code Examples
Working code for the Spring Boot Teaching Materials../materials/README.md.
記事を読む →Spring Boot Advanced Code
Corresponds to Modules 9–12 Testing, Actuator, Production Deployment, Microservices patterns.
記事を読む →Spring Boot Beginner Code
Corresponds to Modules 1–4 What is Spring Boot, Setup, First Application, Core Concepts.
記事を読む →Spring Boot Intermediate Code
Corresponds to Modules 5–8 REST APIs, Spring Data JPA, Spring Security, Configuration.
記事を読む →Module 1: What is Spring Boot?
Explain what Spring Boot is and why it exists Distinguish Spring Framework from Spring Boot List key features and benefits Understand “convention over configuration”
記事を読む →Module 2: Environment Setup
Install JDK 17+ and verify the installation Choose and set up a build tool Maven or Gradle Use Spring Initializr to generate a project Run the generated app from IDE and command line
記事を読む →Module 3: Your First Application
Understand the default project structure Know the role of the main class and @SpringBootApplication Create a simple REST controller and return JSON Use application.properties for basic configuration
記事を読む →Module 4: Core Concepts — IoC, DI, and AutoConfiguration
Explain Inversion of Control IoC and the Spring container Use Dependency Injection DI via constructor injection Understand stereotypes: @Component, @Service, @Controller, @Repository Describe how autoconfiguration works
記事を読む →Module 5: Building REST APIs
Map HTTP methods GET, POST, PUT, PATCH, DELETE to controller methods Use path variables, request parameters, and request bodies Handle validation and error responses Apply REST conventions status codes, resource naming
記事を読む →Module 6: Spring Data JPA
Define JPA entities and map them to tables Create Spring Data JPA repositories interfaces Use derived query methods and @Query Understand transactions and basic best practices
記事を読む →Module 7: Spring Security
Add Spring Security and understand default behavior all endpoints protected Configure permitAll / authenticated / hasRole Implement inmemory and userdetails–based authentication Protect REST APIs with stateless JWT conce
記事を読む →Module 8: Configuration & Profiles
Use application.properties and application.yml Activate profiles dev, test, prod and profilespecific files Inject configuration with @Value and @ConfigurationProperties Understand externalized configuration and precedenc
記事を読む →Module 9: Testing
Write unit tests with JUnit 5 and Mockito Test REST controllers with MockMvc Run integration tests with @SpringBootTest and Testcontainers conceptual Use test slices @WebMvcTest, @DataJpaTest for focused tests
記事を読む →Module 10: Actuator & Monitoring
Add Spring Boot Actuator and expose endpoints Use health, info, metrics, and env endpoints Secure actuator endpoints and customize health Understand production monitoring practices
記事を読む →Module 11: Production Deployment
Build a productionready executable JAR Configure for production profiles, external config, logging Understand containerization with Docker Apply basic production best practices health, security, no default passwords
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