Я использую JSONView, чтобы скрыть вещи от показа в API.Все работает, если я хочу иметь не читаемый JSON.Проблема в том, что я также пытаюсь prettify json, чтобы он выглядел более читабельным.Последняя в последней строке в приведенном ниже методе делает это:
@RequestMapping(path = "/questions")
public @ResponseBody List<Question> questionListRest() throws IOException {
ObjectMapper mapper = new ObjectMapper();
String result = mapper
.writerWithView(Views.Public.class)
.writeValueAsString((List<Question>) questionRepository.findAll());
List<Question> JsonList = mapper.readValue(result, new TypeReference<List<Question>>(){});
return JsonList;
}
Тем не менее, он инициализирует «ответ» как ноль, даже если ответ должен быть полностью скрыт от json (и скрыт отстрока json перед вызовом mapper.readValue):
[ {
"questionId" : 6,
"questionName" : "Which of the following would you most likely eat?",
"questionType" : "checkbox",
"values" : [ "A chainsaw", "A table", "An Apple" ],
"answers" : null
}, {
"questionId" : 7,
"questionName" : "What countries have you visited",
"questionType" : "checkbox",
"values" : [ "Finland", "Sweden", "Estonia" ],
"answers" : null
}, {
"questionId" : 8,
"questionName" : "Where did you last feel unconfortable",
"questionType" : "checkbox",
"values" : [ "At a bar", "While coding spring", "While eating an unsliced long sub" ],
"answers" : null
} ]
Вот мой класс вопросов:
@Entity
public class Question {
@JsonIgnore
private static AnswerRepository answerRepository;
@JsonIgnore
private static CategoryRepository categoryRepository;
@Id
@GeneratedValue(strategy=GenerationType.AUTO)
private Long questionId;
private String questionName;
private String questionType; //text, radio, checkbox..
private String[] values;
public Question(String questionName, String questionType, Category category, String[] values) {
super();
this.questionName = questionName;
this.questionType = questionType;
this.category = category;
this.setValues(values);
}
public Question(String questionName, String questionType, Category category) {
super();
this.questionName = questionName;
this.questionType = questionType;
this.category = category;
}
@ManyToOne(cascade = {CascadeType.MERGE})
@JoinColumn(name = "categoryid")
@JsonBackReference
private Category category;
@JsonView(Views.Internal.class)
public List<Answer> getAnswers() {
return answers;
}
public void setAnswers(List<Answer> answers) {
this.answers = answers;
}
@JsonView(Views.Internal.class)
@OneToMany(cascade = CascadeType.ALL, mappedBy = "question")
@JsonManagedReference
private List<Answer> answers;
public Question() {
super();
}
... getters and setters ...
Вот json перед тем, как readValue
вызываетсяна нем (например, когда result
зарегистрировано)
[{"questionId":6,"questionName":"Which of the following would you most likely eat?","questionType":"checkbox","values":[ "A chainsaw", "A table", "An Apple" ]},{"questionId":7,"questionName":"What countries have you visited","questionType":"checkbox","values":[ "Finland", "Sweden", "Estonia" ]},{"questionId":8,"questionName":"Where did you last feel unconfortable","questionType":"checkbox","values":[ "At a bar", "While coding spring", "While eating an unsliced long sub" ]}]