Jackson 注解

当涉及到在Java对象和JSON之间进行序列化和反序列化时，Jackson是一个非常流行的库。它提供了一组注解，可以用于控制对象的序列化和反序列化过程。这些注解使得开发人员能够更加灵活地控制JSON和Java对象之间的映射关系，从而简化了开发过程。

Jackson官网

https://github.com/FasterXML/jackson

Jackson使用示例

import com.fasterxml.jackson.annotation.JsonInclude;
import com.fasterxml.jackson.annotation.JsonProperty;
import com.fasterxml.jackson.core.JsonProcessingException;
import com.fasterxml.jackson.databind.ObjectMapper;

@JsonInclude(JsonInclude.Include.NON_NULL)
public class Person {
    @JsonProperty("name")
    private String fullName;

    @JsonIgnore
    private int age;

    @JsonFormat(shape = JsonFormat.Shape.STRING, pattern = "yyyy-MM-dd")
    private Date birthDate;

    public Person(String fullName, int age, Date birthDate) {
        this.fullName = fullName;
        this.age = age;
        this.birthDate = birthDate;
    }

    // Getter and setter methods

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

        ObjectMapper objectMapper = new ObjectMapper();
        String json = objectMapper.writeValueAsString(person);
        System.out.println(json);
    }
}