Java杰克逊忽略了重要的财产

Question

我有两个实体课程，praum和praumgruppe。 这个类是hibernate和java jackson mapper。

我在mvc中使用spring / jersey进行开发。

在课堂上，praum是使用班级praumgruppe。类praumgruppe还返回一个praum对象列表。

praumgruppe类的代码

(?!\.)

praum班的代码

(?<!\.)

来自PraumController方法的代码

package de.decon.flaeche.model;

import java.util.ArrayList;
import java.util.List;

import javax.persistence.CascadeType;
import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.FetchType;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.OneToMany;
import javax.persistence.Table;

import org.codehaus.jackson.annotate.JsonAutoDetect;
import org.codehaus.jackson.annotate.JsonBackReference;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.annotate.JsonManagedReference;
import org.codehaus.jackson.annotate.JsonProperty;
import org.hibernate.annotations.Cascade;
import org.hibernate.annotations.LazyCollection;
import org.hibernate.annotations.LazyCollectionOption;

import de.decon.catalogs.model.DeconKatEintragModel;
import de.decon.catalogs.model.KatKostenstelleModel;
import de.decon.flaeche.model.interfaces.PraumgruppeModelInterface;

@Entity
@Table(name = "p_raumgruppe")
@Inheritance(strategy = InheritanceType.JOINED)
@JsonAutoDetect
@JsonIgnoreProperties(ignoreUnknown = true)
public class PraumgruppeModel implements PraumgruppeModelInterface {
    @OneToMany(mappedBy = "praumgruppe", fetch = FetchType.LAZY, cascade = CascadeType.ALL, targetEntity = PraumModel.class)
    @LazyCollection(LazyCollectionOption.EXTRA)
    @Cascade({org.hibernate.annotations.CascadeType.DELETE_ORPHAN})
    private List<PraumModel> listPraum = new ArrayList<PraumModel>();

    @JsonManagedReference
    public List<PraumModel> getListPraum() {
        return listPraum;
    }

    public void setListPraum(List<PraumModel> listPraum) {
        this.listPraum = listPraum;
    }
}

在回复中始终缺少属性praumgruppe。

package de.decon.flaeche.model;

import java.util.Date;

import javax.persistence.Column;
import javax.persistence.Entity;
import javax.persistence.GeneratedValue;
import javax.persistence.GenerationType;
import javax.persistence.Id;
import javax.persistence.Inheritance;
import javax.persistence.InheritanceType;
import javax.persistence.JoinColumn;
import javax.persistence.ManyToOne;
import javax.persistence.Table;
import javax.persistence.Temporal;
import javax.persistence.TemporalType;
import javax.persistence.Transient;

import org.codehaus.jackson.annotate.JsonAutoDetect;
import org.codehaus.jackson.annotate.JsonBackReference;
import org.codehaus.jackson.annotate.JsonIgnore;
import org.codehaus.jackson.annotate.JsonIgnoreProperties;
import org.codehaus.jackson.annotate.JsonProperty;

import de.decon.catalogs.model.DeconKatEintragModel;
import de.decon.flaeche.model.interfaces.PraumModelInterface;

@Entity
@Table(name = "p_raum")
@Inheritance(strategy = InheritanceType.JOINED)
@JsonAutoDetect
@JsonIgnoreProperties(ignoreUnknown = true)
public class PraumModel implements PraumModelInterface {
    @ManyToOne(targetEntity = PraumgruppeModel.class)
    @JoinColumn(name = "id_praumgruppe")
    private PraumgruppeModel praumgruppe;

    @ManyToOne(targetEntity = PraumModel.class)
    @JoinColumn(name = "id_p_raum")
    private PraumModel parent;

    /**
     * Getter und Setter
     */
    @JsonBackReference
    @JsonProperty("praumgruppe")
    @JsonIgnore(false)
    public PraumgruppeModel getPraumgruppe() {
        return praumgruppe;
    }

    public void setPraumgruppe(PraumgruppeModel praumgruppe) {
        this.praumgruppe = praumgruppe;
    }

    @JsonProperty("parent")
    public PraumModel getParent() {
        return parent;
    }

    public void setParent(PraumModel parent) {
        this.parent = parent;
    }
}

有什么问题？

非常感谢你的帮助。