[Solved] Identify the error in this method signature:@PostMapping("/add") public void addUser(@RequestBody String userJson) { User user = new User(); // missing JSON parsing } | Spring Boot

Spring Boot - REST Controllers

Identify the error in this method signature:

@PostMapping("/add")
public void addUser(@RequestBody String userJson) {
  User user = new User();
  // missing JSON parsing
}

AMissing JSON parsing from userJson to User object

BIncorrect HTTP method for @RequestBody

C@RequestBody cannot be used with String type

DMethod should return User object

Step-by-Step Solution

Solution:

Step 1: Check how JSON is handled
The method receives JSON as a String but does not convert it to User object.
Step 2: Identify missing step
Without parsing userJson, the User object remains empty and unusable.
Final Answer:
Missing JSON parsing from userJson to User object -> Option A
Quick Check:
Must parse JSON string to object manually [OK]

Quick Trick: Parse JSON string to object if using String with @RequestBody [OK]

Common Mistakes:

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