Spring 启动 - 验证请求正文 json 密钥

Question

I am working on validating the request body in Spring boot. When the post controller using the below JSON to create record in the DB. It works fine.

{
  "test1": "string",
  "test2": "string",
  "test3": "string",  <--this has @Null in the entity
  "test4": "string"
}

However, when one of the key is @NULL in the entity, it will still able to create a record in the DB. I am wondering if there is something that can validate the key and return error.

{
  "test1": "string",
  "test2": "string",
  "test5": "string", <- wrong key by mistake
  "test4": "string"
}

Entity class

@Entity
@Table(name = "test")
@Data
@NoArgsConstructor
public class Test implements Serializable {

@Id
@Column(name = "test1")
private String test1;

@Column(name = "test2")
@NotNull
private String test2;

@Column(name = "test3")
private String test3;

@Column(name = "test4")
private String test4;
}

Answer 1

You can use Jackson for parsing JSON and handle unknown properties. It will automatically throw UnrecognizedPropertyException if an unknown property is found as described here

Answer 2

If u want to Validate request body in JSON u can use @Valid

      @PostMapping("/books")
    Book newBook(@Valid @RequestBody Test test) {
        return repository.save(Test);
    }

@Column(name = "test3")
@NotNull(message = "Please provide a test3")
private String test3;

if u want on key order
 JsonPropertyOrder({ "test1", "test2", "test3", "test4" })
public class Test implements Serializable {
}