When working with Spring Boot and relational databases, initializing your database schema and loading seed data is a common requirement. Database Initialization in Spring Boot is easy using two fil
Advanced JPA Criteria Queries in Spring Boot
Spring Data JPA gives us simple methods like findByName() or custom queries using @Query. But when you need to build dynamic, complex queries at runtime (especially with multiple filters), Criteria
Native Queries in Spring Data JPA : @Query Annotation
pring Data JPA is powerful. In most cases, you can get away with method naming conventions like findByUsername, or using derived queries. But sometimes, you need more control — like using custom
DTO Mapping in Spring Boot : Best Practices
In Spring Boot applications, especially those using REST APIs, you often don’t want to expose your Entity classes directly to the client. That’s where DTOs (Data Transfer Objects) come in. DTOs
Entity Relationships in Spring Data JPA
In real-world applications, data is often related. For example: Entity Relationships in Spring Data JPA (with Hibernate) allows you to map these relationships easily using annotations. This guide w
Introduction to Spring Data JPA with Hibernate
When you’re building a Java application, you often need to store and retrieve data from a database. Writing this code manually can be repetitive and error-prone. Luckily, Spring Data JPA and
Pagination and Sorting in Spring Boot REST APIs
When your API deals with large datasets — like fetching thousands of users or records — loading everything at once is inefficient. That’s where pagination and sorting come in. They help l
Handling File Upload and Download with Spring Boot REST
In many web applications, file handling is a common requirement — whether it’s uploading profile pictures, downloading reports, or exporting data. Spring Boot makes it easy to build robust REST
Consuming External APIs in Spring Boot using WebClient
When building microservices or applications that rely on external systems, you often need to call third-party REST APIs. While RestTemplate has been widely used for this, WebClient is the modern an
Building Versioned REST APIs in Spring Boot
As APIs evolve, older versions must be supported while newer versions offer enhanced functionality. This is where API versioning becomes essential. Spring Boot doesn’t enforce any specific API ve