使用JsonB反序列化在Java中自动将空字符串转换为null

import javax.json.bind.Jsonb;
import javax.json.bind.JsonbBuilder;
import javax.json.bind.annotation.JsonbProperty;
import javax.json.bind.annotation.JsonbTypeDeserializer;
import javax.json.bind.annotation.JsonbTypeDeserializer.None;
import javax.json.bind.config.PropertyNamingStrategy;

public class JsonBDeserializerExample {
    public static void main(String[] args) {
        String json = "{\"name\":\"John\", \"age\":\"\", \"email\":\"\"}";

        Jsonb jsonb = JsonbBuilder.create();

        Person person = jsonb.fromJson(json, Person.class);

        System.out.println(person.getName());  // Output: John
        System.out.println(person.getAge());   // Output: null
        System.out.println(person.getEmail()); // Output: null
    }

    public static class Person {
        private String name;

        @JsonbProperty("age")
        @JsonbTypeDeserializer(None.class)
        private Integer age;

        @JsonbProperty("email")
        @JsonbTypeDeserializer(None.class)
        private String email;

        // Getters and setters
        // ...
    }
}

<dependency>
    <groupId>javax.json.bind</groupId>
    <artifactId>javax.json.bind-api</artifactId>
    <version>1.0</version>
</dependency>
<dependency>
    <groupId>org.eclipse</groupId>
    <artifactId>yasson</artifactId>
    <version>1.0.3</version>
</dependency>