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Chapter 18: Spring Boot POST REST API — @PostMapping Annotation | Spring Boot Course
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Introduction
In this chapter, we will cover the @PostMapping and @RequestBody annotations in Spring Boot.
The @PostMapping annotation is used to handle HTTP POST requests, while the @RequestBody annotation is used to bind the request body to a method parameter.
We will create endpoints to create resources using these annotations, focusing on the Employee entity as our primary example.
Understanding @PostMapping and @RequestBody Annotations
What is @PostMapping?
The @PostMapping annotation in Spring Boot is used to create a mapping between HTTP POST requests and handler methods in a controller. It is a specialized version of the @RequestMapping annotation designed specifically for handling POST requests.
How @PostMapping Works
When a client sends an HTTP POST request to a specified URL, the @PostMapping annotation maps this request to a specific handler method in the controller. The method processes the request and returns a response, often creating or updating a resource on the server.
Key Features of @PostMapping
- Simplified Mapping:
@PostMappingprovides a clear and concise way to map HTTP POST requests to specific methods, making the code more readable and maintainable. - Handling Form Data and JSON:
@PostMappingcan handle various types of request bodies, including form data and JSON payloads, making it versatile for different use cases. - Integration with @RequestBody: Often used in conjunction with
@RequestBodyto bind the request body to a method parameter, allowing for easy processing of complex data structures.
What is @RequestBody?
The @RequestBody annotation in Spring Boot is used to bind the body of an HTTP request to a method parameter in a controller. It allows Spring to automatically…
