Spring Boot JUnit Jackson无法反序列化所有字段

Question

I have a test case that cannot pass:

ContactDTO contactDTO = generateContactDTO();

HttpEntity<ContactDTO> request = new HttpEntity<>(contactDTO, headers);

ResponseEntity<Response> response = restTemplate.exchange(generateBaseUrl() + "/contacts", HttpMethod.POST, request, Response.class);
assertThat(response.getStatusCode()).isEqualTo(HttpStatus.OK);

Here is my ContactDTO class:

public class ContactDTO {

    @NotNull
    @Size(min = 2, max = 100)
    private String firstName;

    @NotNull
    @Size(min = 2, max = 100)
    private String lastName;

    @NotNull
    @Size(min = 3, max = 100)
    private String email;

    @NotNull
    @Size(min = 3, max = 50)
    private String phoneNumber;

    @JsonCreator(mode = JsonCreator.Mode.PROPERTIES)
    ContactDTO(@JsonProperty("firstName") @NotNull @Size(min = 2, max = 100) String firstName,
           @JsonProperty("lastName") @NotNull @Size(min = 2, max = 100) String lastName,
           @JsonProperty("email") @NotNull @Size(min = 3, max = 50) String email,
           @JsonProperty("phoneNumber") @NotNull @Size(min = 3, max = 50) String phoneNumber) {
        this.firstName = firstName;
        this.lastName = lastName;
        this.email = email;
        this.phoneNumber = phoneNumber;
    }

    String getFirstName() {
        return firstName;
    }

    void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    String getLastName() {
        return lastName;
    }

    void setLastName(String lastName) {
        this.lastName = lastName;
    }

    public String getEmail() {
        return email;
    }

    private void setEmail(String email) {
        this.email = email;
    }

    String getPhoneNumber() {
        return phoneNumber;
    }

    private void setPhoneNumber(String phoneNumber) {
        this.phoneNumber = phoneNumber;
    }

}

@PostMapping
public ResponseEntity<Response<String>> createContact(@Validated @RequestBody ContactDTO contactDTO, BindingResult bindingResult) {
    if (bindingResult.getErrorCount() > 0) {
        LOG.debug("Contact could not validated: {} and won't be created" +
                " Validation error is as follows: {}", contactDTO, bindingResult);

        return ResponseEntity.status(HttpStatus.BAD_REQUEST).body(new Response<>(Error.CONTACT_VALIDATION));
    }
    ...
}

When I debug it, I see that all fields are populated at contactDTO before it's been send to controller. However, at controller, only e-mail field is populated and it results with HTTP Bad Request.

PS: I use Spring Boot 2.1.7.RELEASE

Answer 1

Since there was no public accessors, Jackson could not serialize my DTO. So, I've added this at top of my DTO object:

@JsonAutoDetect(fieldVisibility = JsonAutoDetect.Visibility.ANY)