Jackson Mr Bean Materializer对toString实现的支持

import com.fasterxml.jackson.annotation.JsonAppend;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

@JsonAppend(attrs = {
    @JsonAppend.Attr(value = "name"),
    @JsonAppend.Attr(value = "age")
})
class Person {
    private String name;
    private int age;

    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    // Getters and setters

    @Override
    public String toString() {
        return "Person{" +
                "name='" + name + '\'' +
                ", age=" + age +
                '}';
    }
}

public class Main {
    public static void main(String[] args) throws JsonProcessingException {
        Person person = new Person("John Doe", 30);

        ObjectMapper objectMapper = new ObjectMapper();
        String jsonString = objectMapper.writeValueAsString(person);

        System.out.println(jsonString);
    }
}