How do you integrate Spring Boot with MongoDB for NoSQL databases?

Table of Contents

• Introduction
• Configuring MongoDB in Spring Boot
  • 1. Add Dependencies
  • 2. Define MongoDB Connection Properties
• Using MongoDB Repositories in Spring Boot
  • 1. Create a MongoDB Document
  • 2. Create a Repository Interface
  • 3. Perform CRUD Operations
• Practical Examples
  • Example 1: Adding a New Employee
  • Example 2: Fetching All Employees
  • Example 3: Custom Queries
• Conclusion

Introduction

Integrating Spring Boot with MongoDB offers a scalable and efficient solution for managing NoSQL databases. MongoDB stores data in JSON-like documents, making it a perfect fit for dynamic and hierarchical datasets. Spring Boot simplifies the integration with Spring Data MongoDB, providing repositories and templates for database operations.

Configuring MongoDB in Spring Boot

1. Add Dependencies

Include the required dependency in your pom.xml (for Maven projects).

For Gradle:

2. Define MongoDB Connection Properties

Set MongoDB connection details in the application.properties file.

Using MongoDB Repositories in Spring Boot

1. Create a MongoDB Document

Define a model class annotated with @Document to represent a MongoDB collection.

2. Create a Repository Interface

Use MongoRepository to handle CRUD operations for the document.

3. Perform CRUD Operations

Use the repository in your service or controller.

Practical Examples

Example 1: Adding a New Employee

Example 2: Fetching All Employees

Example 3: Custom Queries

You can define custom queries in the repository using Spring Data MongoDB query methods or annotations like @Query.

Conclusion

Spring Boot integration with MongoDB simplifies the management of NoSQL databases. With Spring Data MongoDB, developers can configure connections, define repositories, and execute CRUD operations with minimal effort. By leveraging the MongoRepository or MongoTemplate, your application can efficiently interact with MongoDB for dynamic and scalable data handling.