java - 类有 Jackson json 注释吗？

Question

我有带有方法的 Controller 类:

@RequestMapping(value = "/createchild", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
public void createChild(@RequestBody Child child) {
    childService.createChild(child);
}

当我使用这个 json 时，它可以工作:

{
    "childfullname":"Lok Maen",
    "password": "jfsddsf1",
    "phonenumber": "+79695426314"
}

但是如果我想发布这样的内容:

    {
    "another parameter": "123",
    "child": {
        "childfullname":"Lok Maen",
        "password": "jfsddsf1",
        "phonenumber": "+79155426314"
    }
}

它不起作用。

子类:

@Entity
@Table(name = "child", schema = "cheer")
public class Child {

    @Id
    @Column(name = "childid")
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    private Long childId;

    @JsonProperty("childfullname")
    @Column(name = "childfullname")
    private String childFullName;

    @JsonProperty("password")
    @Column(name = "password")
    private String password;
// another code
}

如何修改代码以在 json 正文中再发布一个参数？

Answer 1

你需要使用2个类来实现你想要的:

public class CreateChildRequestDTO {
   @JsonProperty("another parameter")
   private String anotherParameter;

   @JsonProperty("child")
   private ChildDTO child;
}

public class ChildDTO {
   @JsonProperty("childfullname")
   private String childFullName;

   @JsonProperty("password")
   private String password;

   @JsonProperty("phonenumber")
   private String phonenumber;
}

并将 Controller 方法更改为:

@RequestMapping(value = "/createchild", method = RequestMethod.POST, consumes = MediaType.APPLICATION_JSON_VALUE)
public void createChild(@RequestBody CreateChildRequestDTO createChildRequest ) {
    ...
}

请注意，在您的示例中，您使用实体类作为 DTO，这是一种不好的做法。对此进行了解释:Mixing entity with payload (dto) in spring boot - best practice .