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how to to Deserialize Nested JSON Objects Using Jackson in Java 11 Project

👀 Views: 207 đŸ’Ŧ Answers: 1 📅 Created: 2025-08-20
jackson json deserialization Java

I keep running into I'm confused about I've been struggling with this for a few days now and could really use some help. I'm trying to deserialize a nested JSON object into a Java object using Jackson, but I'm running into issues with the nested properties not being populated correctly. My JSON structure looks like this: ```json { "user": { "id": 1, "name": "John Doe", "address": { "street": "123 Main St", "city": "Anytown" } } } ``` I have the following Java classes to represent the structure: ```java public class User { private int id; private String name; private Address address; // Getters and setters } public class Address { private String street; private String city; // Getters and setters } ``` And I'm using the following code to deserialize the JSON: ```java ObjectMapper objectMapper = new ObjectMapper(); User user = objectMapper.readValue(jsonString, User.class); ``` However, when I run this, the `Address` object in the `User` class is coming back as `null`. I've already checked that the JSON string is correctly formatted and matches the expected structure. I also tried adding annotations like `@JsonProperty` to the fields, but it didn't help. My Jackson dependency is on version 2.12.3. Is there something I'm missing in the configuration or in the way I'm defining my classes? Any suggestions would be greatly appreciated! How would you solve this? I'm working on a REST API that needs to handle this.