Chapter 15: Spring Boot REST API with Path Variable | Spring Boot Course

Previous Chapter:

Spring Boot REST API That Returns List of Java Objects in JSON Format

Introduction

This chapter will continue from the previous chapter, where we created a Spring Boot REST API that returns a list of Java Beans as JSON. We will now learn how to use the @PathVariable annotation to create a REST API that can accept and handle path variables.

@PathVariable Annotation Overview

What is @PathVariable?

The @PathVariable annotation in Spring Boot is used to extract values from the URL path and bind them to method parameters in a controller. It helps in mapping dynamic values in the URL to method parameters.

How @PathVariable Works

When a client sends a request to a specific URL, the @PathVariable annotation extracts parts of the URL and assigns them to method parameters. This is useful for accessing and processing specific resources identified by parts of the URL.

Key Features of @PathVariable

1. Binding URL Segments to Parameters: It binds segments of the URL directly to method parameters in the…