Java Spring Web 序列化子类的属性

Question

我有一个 Maven Java Spring Rest 项目，我想在其中执行此操作。

@RestController
@RequestMapping("/person")
public class PersonController {
  @GetMapping
  public List<Person> getPerson(){

    List<Person> persons = new ArrayList<>();

    persons.add(new Dev(1, "Java")); //Let's say I have the constructor
    persons.add(new DevOps(2, "Linux")); //Let's say I have the constructor

    return implants;
  }
}

  public class Person{ public int id;}

  public class Dev extends Person{ public string lang;}

  public class DevOps extends Person{ public string env;}

我希望结果是

[

{id : 1, lang: "Java"},//<- 这是开发

{id : 2, env: "Linux"},//<- 这是 DevOps

]

不仅仅是

[

{id : 1},//<- 这是开发

{id : 2},//<- 这是 DevOps

]

Answer 1

尝试重现您的问题，但没有成功:

@RestController
@RequestMapping("/person")
public class PersonController {

    @GetMapping
    public List<Person> getPerson(){
        List<Person> persons = new ArrayList<>();

        persons.add(new Dev(1, "Java")); //Let's say I have the constructor
        persons.add(new DevOps(2, "Linux")); //Let's

        return persons;
    }
}

public class Person {
    public int id;

    public Person(int id) {
        this.id = id;
    }
}

public class Dev extends Person {
    public String lang;

    public Dev(int id, String lang) {
        super(id);
        this.lang = lang;
    }
}

public class DevOps extends Person {
    public String env;

    public DevOps(int id, String env) {
        super(id);
        this.env = env;
    }
}

结果:

http://localhost:8080/person/

[{"id":1,"lang":"Java"},{"id":2,"env":"Linux"}]

您确定您发布了所有相关代码吗？既然您说过假设我有构造函数，我只能假设您正确创建了它们。