👀 Views: 30 💬 Answers: 1 📅 Created: 2025-07-02

spring-mvc json jackson rest Java

I'm collaborating on a project where I'm trying to figure out I'm upgrading from an older version and I am working with a question with deserializing complex JSON objects in my Spring MVC application using the @RequestBody annotation... I have a REST endpoint that is supposed to receive a JSON object representing a user with nested properties, but I keep working with issues where the nested objects are not being populated as expected. Here's the signature of my controller method: ```java @PostMapping("/users") public ResponseEntity<User> createUser(@RequestBody User user) { // Logic to save user return ResponseEntity.ok(user); } ``` The `User` class has a nested class `Address`: ```java public class User { private String name; private int age; private Address address; // Getters and Setters } public class Address { private String street; private String city; private String zipCode; // Getters and Setters } ``` When I send the following JSON payload: ```json { "name": "John Doe", "age": 30, "address": { "street": "123 Main St", "city": "Springfield", "zipCode": "12345" } } ``` I expect the `address` field to be populated properly, but I'm getting a `HttpMessageNotReadableException` with the message: ``` Could not read JSON: Unrecognized field "address" (class com.example.User), not marked as ignorable ``` I have verified that I have Jackson dependencies included in my `pom.xml`: ```xml <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.12.3</version> </dependency> ``` I also made sure to include getters and setters for all properties in both the `User` and `Address` classes. What could be causing this scenario? Is there something specific I need to configure in my Spring MVC setup to properly deserialize the nested objects from the JSON payload? Any suggestions would be greatly appreciated. I'm using Java 3.9 in this project. Am I approaching this the right way? The stack includes Java and several other technologies. How would you solve this? This is for a mobile app running on Ubuntu 22.04. Could someone point me to the right documentation?