@RequestBody for JSON input in Spring Boot - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to accept JSON input in a Spring Boot controller method.

Spring Boot

public ResponseEntity<String> createUser([1] User user) {
    // method body
}

Drag options to blanks, or click blank then click option'

A@PathVariable

B@RequestParam

C@RequestBody

D@Autowired

Attempts:

3 left

💡 Hint

Common Mistakes

Using @PathVariable instead of @RequestBody

Forgetting to annotate the parameter

The @RequestBody annotation tells Spring Boot to convert the JSON input into a User object.

2fill in blank

medium

Complete the code to specify the HTTP method and path for JSON input handling.

Spring Boot

@[1]("/users")
public ResponseEntity<String> addUser(@RequestBody User user) {
    // method body
}

Drag options to blanks, or click blank then click option'

AGetMapping

BPostMapping

CDeleteMapping

DPutMapping

Attempts:

3 left

💡 Hint

Common Mistakes

Using GetMapping which does not support request body

Using DeleteMapping or PutMapping incorrectly

PostMapping is used to handle HTTP POST requests, which are commonly used to send JSON data to create resources.

3fill in blank

hard

Fix the error in the method parameter to correctly receive JSON input.

Spring Boot

public ResponseEntity<String> updateUser([1] user) {
    // method body
}

Drag options to blanks, or click blank then click option'

AUser

B@PathVariable User

C@RequestParam User

D@RequestBody User

Attempts:

3 left

💡 Hint

Common Mistakes

Missing @RequestBody annotation

Using @RequestParam or @PathVariable incorrectly

The parameter must be annotated with @RequestBody to tell Spring to convert JSON input to the User object.

4fill in blank

hard

Fill both blanks to create a controller method that accepts JSON and returns a response.

Spring Boot

@[1]("/products")
public ResponseEntity<[2]> addProduct(@RequestBody Product product) {
    // method body
}

Drag options to blanks, or click blank then click option'

APostMapping

BGetMapping

CProduct

DString

Attempts:

3 left

💡 Hint

Common Mistakes

Using GetMapping for JSON input

Returning the Product object instead of a response message

PostMapping handles POST requests for JSON input. The method returns a ResponseEntity to send a response message.

5fill in blank

hard

Fill all three blanks to define a Spring Boot controller method that accepts JSON, validates it, and returns a response.

Spring Boot

@[1]("/orders")
public ResponseEntity<[2]> placeOrder(@Valid @RequestBody [3] order) {
    // method body
}

Drag options to blanks, or click blank then click option'

APostMapping

BString

COrder

DGetMapping

Attempts:

3 left

💡 Hint

Common Mistakes

Using GetMapping instead of PostMapping

Missing @RequestBody or @Valid annotations

Wrong return type

PostMapping is for POST requests. The method returns ResponseEntity. The parameter is an Order object annotated with @RequestBody and @Valid for validation.