springboot 使用hibernate进行双向关联json解析时死循环处理

一.问题

当我们进行hibernate进行双向关联时,我们用json解析时进入死循环,如果我们不用json不会死循环因为不用JSON时一般有懒加载不会出现死循环。
例如下面:
Examination.java中Examination一对多questions

    @OneToMany(targetEntity = Question.class, cascade = CascadeType.REMOVE, mappedBy = "examination", fetch = FetchType.LAZY)    @OrderBy("id")    private Set<Question> questions = new HashSet<>();

Question.java中Question多对一examination

    @ManyToOne(targetEntity = Examination.class, fetch = FetchType.LAZY)    @JoinColumn(name = "examination_id", referencedColumnName = "id", nullable = false)    private Examination examination;

二.方法

在类的开始或者属性的前面加上@JsonIgnoreProperties注解代码如下:

Entity@Table(name = "examination", catalog = "questionnaire")@JsonIgnoreProperties(value = {"user", "hibernateLazyInitializer", "hibernateLazyInitializer", "handler", "fieldHandler"})public class Examination extends BaseBean {    private static final long serialVersionUID = -2594676432596634203L;    @Id    @GeneratedValue(strategy = GenerationType.AUTO)    private Integer id;    //自测还是他测 self自测 other他测    private String type;    @Column(unique = true, nullable = false)    private String name;    //总共的时间    private Integer allTime;    public Double totalScore;    @OneToMany(targetEntity = ExaminationComment.class, cascade = CascadeType.REMOVE, mappedBy = "examination", fetch = FetchType.EAGER)    @OrderBy("subsection")    private Set<ExaminationComment> examinationComments = new HashSet<>();    @OneToMany(targetEntity = Question.class, cascade = CascadeType.REMOVE, mappedBy = "examination", fetch = FetchType.LAZY)    @OrderBy("id")    private Set<Question> questions = new HashSet<>();    @ManyToOne(targetEntity = User.class, fetch = FetchType.LAZY)    @JoinColumn(name = "user_id", referencedColumnName = "id", nullable = false)    private User user;

@Entity@Table(name = "question", catalog = "questionnaire")@JsonIgnoreProperties(value = {"examination"})public class Question extends BaseBean {    private static final long serialVersionUID = 8720345728105271415L;    @Id    @GeneratedValue(strategy = GenerationType.AUTO)    private Integer id;    //文本内容    private String title;    //分数    private Double score;    private String content;    //正确答案    private String correctOption;    private String comment;    @ManyToOne(targetEntity = Examination.class, fetch = FetchType.LAZY)    @JoinColumn(name = "examination_id", referencedColumnName = "id", nullable = false)    private Examination examination;    private String questionType;    @OneToMany(targetEntity = ChoiceAnswer.class, fetch = FetchType.LAZY, mappedBy = "question", cascade = CascadeType.REMOVE)    @OrderBy("theOption")    private Set<ChoiceAnswer> choiceAnswers = new HashSet<>();