implementing Custom Deserialization of Nested JSON Objects Using Jackson in Spring Boot 2.5
Does anyone know how to I'm relatively new to this, so bear with me. I'm having trouble with custom deserialization of a nested JSON object in my Spring Boot application using Jackson. The JSON structure looks like this: ```json { "user": { "id": 1, "name": "John Doe", "address": { "street": "123 Main St", "city": "Anytown" } } } ``` I created the following 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 } ``` However, when I attempt to deserialize the JSON using the following code: ```java ObjectMapper objectMapper = new ObjectMapper(); User user = objectMapper.readValue(jsonString, User.class); ``` I receive the following behavior: ``` com.fasterxml.jackson.databind.exc.InvalidDefinitionException: want to construct instance of `User` (no Creator, default constructor, or no properties); nested exception is com.fasterxml.jackson.databind.JsonMappingException: No content to map due to end-of-input ``` I ensured that my classes have default constructors and public getters/setters. I also checked the JSON string to confirm that it's not empty. I tried adding annotations like `@JsonCreator` and `@JsonProperty` but I still face the same scenario. I've verified that the Jackson dependencies are correct in my `pom.xml`: ```xml <dependency> <groupId>com.fasterxml.jackson.core</groupId> <artifactId>jackson-databind</artifactId> <version>2.12.3</version> </dependency> ``` Is there something I'm missing with the deserialization process for nested objects? Any insights would be greatly appreciated. This is part of a larger application I'm building. Is there a better approach? I'm working with Java in a Docker container on Windows 10.