Java jackson反序列化,2个字段自引用同一类(自引用循环)
我有以下引用自身的类:Java jackson反序列化,2个字段自引用同一类(自引用循环),java,spring,jackson,self-reference,Java,Spring,Jackson,Self Reference,我有以下引用自身的类: @Entity @Inheritance(strategy = TABLE_PER_CLASS) //@JsonIdentityInfo(property="rowId", generator = ObjectIdGenerators.PropertyGenerator.class) public abstract class AbstractEntity implements Serializable { /** * */ priv
@Entity
@Inheritance(strategy = TABLE_PER_CLASS)
//@JsonIdentityInfo(property="rowId", generator = ObjectIdGenerators.PropertyGenerator.class)
public abstract class AbstractEntity implements Serializable {
/**
*
*/
private static final long serialVersionUID = 568799551343430329L;
@OneToOne(optional=false, fetch=FetchType.EAGER)
@JoinColumn(name="createdBy")
protected User createdBy;
@OneToOne(optional=false, fetch=FetchType.EAGER)
@JoinColumn(name="lastUpdatedBy")
protected User lastUpdatedBy;
@Id
@GeneratedValue(strategy = GenerationType.TABLE)
@Column(unique = true, nullable = false, updatable = false, length = 7)
private Integer rowId;
public User getCreatedBy() {
return this.createdBy;
}
public void setCreatedBy(User createdBy) {
this.createdBy = createdBy;
}
public User getLastUpdatedBy() {
return this.lastUpdatedBy;
}
public void setLastUpdatedBy(User lastUpdatedBy) {
this.lastUpdatedBy = lastUpdatedBy;
}
public Integer getRowId() {
return this.rowId;
}
public void setRowId(Integer RowId) {
this.rowId = RowId;
}
public String toString() {
return "[Id]:" + this.rowId + " - [CreatedBy]:" + this.createdBy;
}
}
然后我有一个类User
扩展这个类和一个RepositoryUser界面:
public interface RepositoryUser extends CrudRepository<User, Integer> {
}
public interface RepositoryUser扩展了crudepository{
}
以及控制器:
@Controller
@RequestMapping(path = "/user")
public class ServiceUser {
@Autowired
private RepositoryUser repositoryUser;
@GetMapping(path="/all", produces = "application/json; charset=UTF-8", headers = "Accept=application/json")
public @ResponseBody Iterable<User> getAllUsers() {
return repositoryUser.findAll();
}
@PostMapping(path="/add", consumes="application/json")
public @ResponseBody User createOneUser(@RequestBody User user) {
System.out.println(user);
return repositoryUser.save(user);
}
}
@控制器
@请求映射(路径=“/user”)
公共类服务用户{
@自动连线
私有RepositoryUser RepositoryUser;
@GetMapping(path=“/all”,products=“application/json;charset=UTF-8”,headers=“Accept=application/json”)
public@ResponseBody Iterable getAllUsers(){
返回repositoryUser.findAll();
}
@PostMapping(path=“/add”,consumes=“application/json”)
public@ResponseBody用户createOneUser(@RequestBody用户){
System.out.println(用户);
返回repositoryUser.save(用户);
}
}
我的问题是,我在同一个类中两次引用用户(createdby和lastupdatedby),或者我尝试了JSonIdentityInfo、Jsonmanaged和jsonback,但都不起作用。没错
我需要能够
{
用户1数据,包括创建人和上次更新人
用户2数据,包括创建人和上次更新人
}
当我添加时,我需要设置创建记录的用户
你能帮帮我吗
非常感谢 您可以使用StdSerializer编写/尝试自定义序列化程序 CustomJsonSerializer的示例。注意:没有运行代码
public class CustomJsonSerializer extends StdSerializer<AbstractEntity> {
public CustomJsonSerializer() {
this(null);
}
public CustomJsonSerializer(Class<AbstractEntity> t) {
super(t);
}
@Override
public void serialize(AbstractEntity value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonGenerationException {
Field[] fields = value.getClass().getDeclaredFields();
jgen.writeStartObject();
for (Field field : fields) {
field.setAccessible(true);
try {
// Do the proper field mapping for field types . Object type example
jgen.writeObjectField(field.getName(), field.get(value));
} catch (Exception e) {
// catch error
}
}
jgen.writeEndObject();
}
}
public类CustomJsonSerializer扩展了StdSerializer和
可能的不同解决方案
您可以使用StdSerializer编写/尝试自定义序列化程序
CustomJsonSerializer的示例。注意:没有运行代码
public class CustomJsonSerializer extends StdSerializer<AbstractEntity> {
public CustomJsonSerializer() {
this(null);
}
public CustomJsonSerializer(Class<AbstractEntity> t) {
super(t);
}
@Override
public void serialize(AbstractEntity value, JsonGenerator jgen, SerializerProvider provider) throws IOException, JsonGenerationException {
Field[] fields = value.getClass().getDeclaredFields();
jgen.writeStartObject();
for (Field field : fields) {
field.setAccessible(true);
try {
// Do the proper field mapping for field types . Object type example
jgen.writeObjectField(field.getName(), field.get(value));
} catch (Exception e) {
// catch error
}
}
jgen.writeEndObject();
}
}
public类CustomJsonSerializer扩展了StdSerializer和
可能的不同解决方案
一种方法是。另一种方法是编写自己的序列化程序,扩展StdSerializerOne。另一种方法是编写自己的序列化程序扩展STDSerializer谢谢!这是一种魅力!仅供参考,我使用公共类UserSerializer扩展JsonSerializer而不是StdSerializer。@GrooveRage很高兴能提供帮助。谢谢tinus!这是一种魅力!仅供参考,我使用公共类UserSerializer扩展JsonSerializer而不是StdSerializer。@GrooveRage很乐意提供帮助。