As a senior Java backend engineer with experience in Spring Boot and MySQL, you are already familiar with making POST requests to send data to a RESTful API.

In a Spring Boot application, you can define a POST endpoint using the @PostMapping annotation. This annotation maps an HTTP POST request to a specific method in a controller class.

Here's an example of a simple UserController class in a Spring Boot application that handles a POST request to create a new user:

1import org.springframework.http.ResponseEntity;
2import org.springframework.web.bind.annotation.PostMapping;
3import org.springframework.web.bind.annotation.RequestBody;
4import org.springframework.web.bind.annotation.RestController;
5
6@RestController
7public class UserController {
8
9  @PostMapping("/users")
10  public ResponseEntity<String> createUser(@RequestBody User user) {
11    // logic for creating a new user in the database
12    // ...
13
14    // return the response
15    return ResponseEntity.ok("User created successfully");
16  }
17}

In this example, the @PostMapping("/users") annotation specifies that this method handles POST requests to the /users endpoint. The @RequestBody annotation is used to bind the request body to the User object. Inside the method, you can implement the logic to create a new user in the database or any other data source.

Keep in mind that this is just a basic example, but in a real-world application, you would typically validate the input, hash passwords, and perform other necessary operations before creating the user.

As a Java backend engineer, you are well-equipped to make POST requests to send data to a RESTful API. This knowledge will be valuable as you learn to develop frontend applications with React and integrate them with your RESTful API!

Now, let's practice making POST requests to create new users in a RESTful API. Write a JavaScript function createUser that makes a POST request to the /users endpoint with the following payload:

1{
2  "name": "John Doe",
3  "email": "john.doe@example.com",
4  "password": "secret"
5}

Make sure to import the necessary libraries and handle any errors that may occur. Once you have written the function, call it to create a new user and log the response.

1// Write your createUser function here
2
3createUser();