JPA双向关系抛出java.lang.StackOverflowError:null [英] JPA Bidirectional relationship throws java.lang.StackOverflowError: null
问题描述
我正在尝试将两个实体与JPA相关联,当我运行项目时,不要抛出错误,但是当我请求让我成为社区领袖投票者的方法时,我会得到下一个例外:
i'm trying to relate two entities with JPA, when i run the project don't throws me errors but when i request the method that get me the Voters of a Comunity Leader i get the next Exception:
java.lang.StackOverflowError: null
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:127) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245) ~[gson-2.8.5.jar:na]
at com.google.gson.Gson$FutureTypeAdapter.write(Gson.java:1018) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:127) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:127) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245) ~[gson-2.8.5.jar:na]
at com.google.gson.Gson$FutureTypeAdapter.write(Gson.java:1018) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:97) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.CollectionTypeAdapterFactory$Adapter.write(CollectionTypeAdapterFactory.java:61) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:127) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.TypeAdapterRuntimeTypeWrapper.write(TypeAdapterRuntimeTypeWrapper.java:69) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$1.write(ReflectiveTypeAdapterFactory.java:127) ~[gson-2.8.5.jar:na]
at com.google.gson.internal.bind.ReflectiveTypeAdapterFactory$Adapter.write(ReflectiveTypeAdapterFactory.java:245) ~[gson-2.8.5.jar:na]
at com.google.gson.Gson$FutureTypeAdapter.write(Gson.java:1018) ~[gson-2.8.5.jar:na]
我不喜欢循环,我不知道如何解决这个问题.
I'ts like a loop, i don't khow how to resolve this.
这是我的课程:
1)领导者实体:
@Entity
@Table(name = "leaders")
public class Leader implements Serializable {
private static final long serialVersionUID = 1L;
@Id
@GeneratedValue(strategy = GenerationType.IDENTITY)
Long id;
@NotEmpty
String phone;
@NotEmpty
String name;
@OneToMany( mappedBy = "leader", fetch = FetchType.LAZY,cascade = CascadeType.ALL, orphanRemoval = true)
private List<Voter> voters;
public Leader() {
voters = new ArrayList<>();
}
public Long getId() {
return id;
}
public void setId(Long id) {
this.id = id;
}
public String getCelular() {
return phone;
}
public void setCelular(String celular) {
this.phone = celular;
}
public String getNombre() {
return name;
}
public void setNombre(String nombre) {
this.name = nombre;
}
public List<Voter> getVotantes() {
return voters;
}
public void setVotantes(List<Voter> votantes) {
this.voters = votantes;
}
public void addVotante(Voter votante){
voters.add(votante);
}
}
2)投票实体:
@Entity
@Table(name = "voters")
public class Voter implements Serializable {
@Id
String id;
String name;
String phone;
String email;
@Column(name = "electoral_school")
String electoralSchool;
@Temporal(TemporalType.DATE)
Date registrationDate;
@ManyToOne(fetch = FetchType.LAZY)
private Leader leader;
@ManyToOne(fetch = FetchType.LAZY, cascade = CascadeType.ALL)
Sector sector;
@PrePersist
public void prePersist() {
registrationDate = new Date();
}
public String getCedula() {
return id;
}
public void setCedula(String cedula) {
this.id = cedula;
}
public String getNombre() {
return name;
}
public void setNombre(String nombre) {
this.name = nombre;
}
public String getTelefono() {
return phone;
}
public void setTelefono(String telefono) {
this.phone = telefono;
}
public String getEmail() {
return email;
}
public void setEmail(String email) {
this.email = email;
}
public String getColegioElectoral() {
return electoralSchool;
}
public void setColegioElectoral(String colegioElectoral) {
this.electoralSchool = colegioElectoral;
}
public Leader getDirigente() {
return leader;
}
public void setDirigente(Leader dirigente) {
this.leader = dirigente;
}
public Date getRegistro() {
return registrationDate;
}
public void setRegistro(Timestamp registro) {
this.registrationDate = registro;
}
}
3)LeaderController:
3)LeaderController :
@Controller
@RequestMapping("/leader")
public class LeaderController {
@Autowired
IDirigenteService leaderService;
@RequestMapping(value="getVoters/{leader_id}")
@ResponseBody
public String getAll(@PathVariable(value = "leader_id") Long leader_id){
Gson gson = new Gson();
return gson.toJson(leaderService.findById(leader_id).getVotantes());
}
}
我在表中用import.sql中的测试数据填充.
I fill the tables with test data in import.sql.
谢谢.
推荐答案
Hibernate OneToMany或JPA双向关系引发java.lang.StackOverflowError: null
是循环依赖关系问题,如果使用@Data
复杂注释,则可能源自Lombok的toString()
自动生成方法.
Hibernate OneToMany or JPA Bidirectional relationship throws java.lang.StackOverflowError: null
is a Circular dependency issue that can originate from Lombok's toString()
autogenerated method if you use @Data
complex annotation.
要排除某个字段或更佳字段的循环依赖关系,如果不需要toString(),请使用@Getter
和@Setter
.好吧,当我遇到上述问题时,这些解决方案对我有用.
To exclude your circular dependency for a certain field or better still, you use @Getter
and @Setter
if you do not need the toString(). Well, when I had those issues above these solutions worked for me.
然后可以在特定属性上使用@JsonIgnore
.
You may then use the @JsonIgnore
on the particular attribute.
@Getter
@Setter
public class MyClass {
}
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