Both @GetMapping and @PostMapping are specialized annotations in Spring that simplify request handling for HTTP GET and POST requests. They serve the same purpose as @RequestMapping but are more concise.
3 Points compared and contrasted:
- HTTP Methods:
- @GetMapping: Handles HTTP GET requests, typically used for retrieving data.
- @PostMapping: Handles HTTP POST requests, typically used for submitting or sending data to the server.
Use @GetMapping for data retrieval and @PostMapping for data submission.
4. Request Purpose:
5. @GetMapping: Used when you want to request data from the server without causing any changes (e.g., viewing a list of items).
6. @PostMapping: Used when you want to submit data to the server, often leading to changes (e.g., creating a new resource).
Use @GetMapping for read operations and @PostMapping for create or update operations.
7. Example Usage:
8. @GetMapping:
java
@GetMapping("/users")
public List<User> getAllUsers() {
return userService.getUsers();
}
Retrieves a list of users from the server.
9. @PostMapping:
java
@PostMapping("/users")
public String createUser(@RequestBody User user) {
userService.saveUser(user);
return "User created";
}
Submits a new user to the server and saves it.
In summary, use @GetMapping for fetching data and @PostMapping for sending data to the server.