json 응답을 캡처 한 결과 {page ":"1 ","total ":"2 ","records ":"15 ","rows ": {{"id ": 1, "firstName": "John", "lastName": "Smith", "username": "john", "password": "21232f297a57a5a743894a0e4a801fc3", "role": null}, { "id": 2, "firstName" "Jane", "lastName": "Adams", "username": "jane", "password": "ee11cbb19052e40b07aac0ca060c23ee", "role": null},Jackson 직렬화 중에 자식 객체가 null입니까?
내 사용자 및 역할 클래스는 매우 간단하므로 나는 사소한 것을 간과해야한다고 생각한다.
@Entity(name="user")
public class User implements Serializable {
/**
*
*/
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
private String firstName;
private String lastName;
@Column(unique=true)
private String username;
private String password;
@JsonIgnore
@OneToMany(mappedBy="user", cascade={CascadeType.PERSIST, CascadeType.MERGE},fetch =FetchType.EAGER)
private List<Role> roles = new ArrayList<Role>();
public List<Role> getRoles() {
return roles;
}
public void setRoles(List<Role> roles) {
this.roles = roles;
}
@ManyToOne
private Role role;
public User() {}
public User(String username, String password, String firstName, String lastName, Role role) {
this.username = username;
this.password = password;
this.firstName = firstName;
this.lastName = lastName;
this.role = role;
}
public User(String username, String firstName, String lastName, Role role) {
this.username = username;
this.firstName = firstName;
this.lastName = lastName;
this.role = role;
}
public User(String username) {
this.username = username;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getFirstName() {
return firstName;
}
public void setFirstName(String firstName) {
this.firstName = firstName;
}
public String getLastName() {
return lastName;
}
public void setLastName(String lastName) {
this.lastName = lastName;
}
public String getUsername() {
return username;
}
public void setUsername(String username) {
this.username = username;
}
public String getPassword() {
return password;
}
public void setPassword(String password) {
this.password = password;
}
public Role getRole() {
return role;
}
public void setRole(Role role) {
this.role = role;
}
}
@Entity(name="role")
public class Role implements Serializable{
/**
*
*/
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.AUTO)
private Long id;
@JsonIgnore
@ManyToOne
@JoinColumn (name = "user_id", nullable= true)
private User user;
private Integer role;
public Role() {}
public Role(Integer role) {
this.role = role;
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public User getUser() {
return user;
}
public void setUser(User user) {
this.user = user;
}
public Integer getRole() {
return role;
}
public void setRole(Integer role) {
this.role = role;
}
}
나는 또한
시도@JsonUnwrapped @ManyToOne 민간 역할의 역할;
하지만이 경우에는 내 json이 전혀 역할을하지 않기 때문에 악화됩니다. { "ID": 1, "firstName을"은 "존", "이 lastName": "스미스", "이름": "존", "비밀번호": "21232f297a57a5a743894a0e4a801fc3를"},