how to map nested values with Jackson to flatten out a complex data structure when deserialize
时间: 2024-02-17 11:04:53 浏览: 25
To deserialize a flattened JSON structure with nested values using Jackson, you can again use the `@JsonUnwrapped` annotation. Here's an example:
Suppose you have the following flattened JSON structure:
```
{
"name": "John",
"street": "123 Main St",
"city": "Anytown",
"email": "john@example.com",
"phone": "555-1234"
}
```
To deserialize this into the `Person` class with nested `Address` and `Contact` classes, add the `@JsonUnwrapped` annotation to the nested classes in the `Person` class:
```
public class Person {
private String name;
@JsonUnwrapped
private Address address;
@JsonUnwrapped
private Contact contact;
// getters and setters
}
public class Address {
private String street;
private String city;
// getters and setters
}
public class Contact {
private String email;
private String phone;
// getters and setters
}
```
This will deserialize the flattened JSON structure and map the nested values to the `Address` and `Contact` objects in the `Person` class.