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![Data Validation and Exception Handling [Java Spring Boot Mastery Series – Part 4]](https://seoinfotech.com/wp-content/uploads/2025/06/jav-spring-boot-mastery--300x200.png)
ByVed Maurya
Updated
🎯 Objective Learn to validate incoming data using annotations and handle exceptions globally for consistent and informative error responses. ✅ Add Validation Dependency (if not already included) In pom.xml: This enables Java Bean Validation using annotations like @NotNull, @Size, etc. 🧾 Update Product Entity with Validation 🔍 Explanation 🔁 Update…
ByVed Maurya
Updated
🎯 Objective Separate internal models from external API contracts using DTOs (Data Transfer Objects) and simplify object mapping using ModelMapper. 📦 Step 1: Create a ProductDTO Class 🔍 Explanation 🔧 Step 2: Add ModelMapper Bean 🔍 Explanation 🔁 Step 3: Update Service to Use DTOs 🔍 Explanation 🌐 Step 4:…
ByVed Maurya
Updated
🎯 Objective Understand how to model relationships between entities in a Spring Boot application using JPA annotations, including: 🧱 Example Domain Let’s model a simple domain with the following: 1️⃣ One-to-One: User and Profile 🔍 Notes: 2️⃣ One-to-Many and Many-to-One: User and Orders 🔍 Notes: 3️⃣ Many-to-Many: Order and Product…
ByVed Maurya
Updated
Spring Data JPA allows you to define custom queries using method names or the @Query annotation. 🛠️ 1. Derived Query Methods Spring Data JPA can derive queries based on method names: 🔍 Description: 💡 Tip: Use descriptive method names for clarity. 📜 2. Custom Queries with @Query You can write…
ByVed Maurya
Updated
To use MySQL with Spring Boot, you’ll configure the database connection, define entities, and use Spring Data JPA repositories. 🧰 1. Add MySQL & JPA Dependencies (Maven) Description: ⚙️ 2. Configure application.properties Description: 🧱 3. Define Entity Example Description: 📦 4. Repository Interface 🧪 5. Load Sample Data (Optional) Use…
ByVed Maurya
Updated
Swagger helps developers explore and test REST APIs directly from a browser. Spring Boot integrates Swagger through the Springfox or springdoc–openapi libraries. 🧰 1. Add Swagger Dependency (Spring Boot 3+ with springdoc-openapi) Description: ⚙️ 2. Access Swagger UI Once you start your Spring Boot app, navigate to: You’ll see a…
ByVed Maurya
Updated
Spring Security provides a robust authentication and authorization framework for securing Spring Boot applications. 1️⃣ Basic Authentication Basic Auth is the simplest way to protect endpoints using HTTP headers. ✅ Dependencies Already included in spring-boot-starter-security: 🔐 Security Configuration (Spring Boot 3+) 🔍 Explanation: 2️⃣ JWT (JSON Web Tokens) JWT is…
ByVed Maurya
Updated
Monitoring and logging are vital for observing the health and behavior of your Spring Boot application. 📝 1. Logging with Spring Boot (SLF4J + Logback) Spring Boot uses SLF4J with Logback by default. Example: 📌 Explanation: ⚙️ 2. Customize Logging Level in application.properties Explanation: 🔍 3. Actuator for Monitoring Spring…
ByVed Maurya
Updated
Testing ensures the reliability and maintainability of your codebase. ✅ 1. Unit Testing with JUnit and Mockito Dependency (Maven) Sample Unit Test (Service Layer) Explanation: 🔄 2. Integration Testing with TestRestTemplate Sample Test Explanation: 🧹 3. Best Practices for Testing ➡️ Next Up: Part 13 – Spring Boot with Docker…
ByVed Maurya
Updated
🚀 Why Use Docker? Docker allows you to package your application with all its dependencies into a single container, ensuring consistency across environments. 🛠️ 1. Dockerize a Spring Boot App Step 1: Add Dockerfile Step 2: Build the Docker Image Step 3: Run the Container Explanation: 🧪 2. Use Docker…
ByVed Maurya
Updated
Continuous Integration and Continuous Deployment (CI/CD) helps automate the testing, building, and deployment process. We’ll explore both: 🟦 1. CI/CD Using GitHub Actions 🔧 Step 1: Create Workflow File Create .github/workflows/ci.yml in your project: 🔍 Description: 🟠 2. CI/CD Using Jenkins 🔧 Step 1: Install Jenkins Plugins Install these plugins…
ByVed Maurya
Updated
Performance is critical in enterprise-grade applications. In this part, we’ll explore tools, techniques, and Spring Boot features to improve performance, including caching, lazy loading, asynchronous processing, and profiling. 🚀 Why Performance Optimization? 🔁 1. Caching in Spring Boot Spring Boot supports caching using the @Cacheable, @CachePut, and @CacheEvict annotations. ✅…