杰克逊 JSON 提供者忽略 @JsonIgnore

Question

我有一个用于访问某些数据的 JAX-RS 服务。有其他类的链接，我用@JsonIgnore 注释。现在，Jackson 提供者忽略了这些注释。

我的对象：

@Entity
@Table(name = "documents")
@XmlRootElement
public class Document implements Serializable {
    private static final long serialVersionUID = 1L;

    @Id
    @GeneratedValue(strategy = GenerationType.IDENTITY)
    @Basic(optional = false)
    @Column(name = "id")
    private Integer id;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 10)
    @Column(name = "version")
    private String version;
    @Basic(optional = false)
    @NotNull
    @Size(min = 1, max = 35)
    @Column(name = "document_number")
    private String documentNumber;
    @Basic(optional = false)
    @NotNull
    @Column(name = "document_date")
    @Temporal(TemporalType.TIMESTAMP)
    private Date documentDate;
    @OneToMany(cascade = CascadeType.ALL, mappedBy = "subDocument", fetch = FetchType.LAZY)
    private List<SubDocument> subDocumentList;

    public Document() {
    }

    public Document(Integer id) {
        this.id = id;
    }

    public Document(Integer id, String version, String documentNumber, Date documentDate) {
        this.id = id;
        this.version = version;
        this.documentNumber = documentNumber;
        this.documentDate = documentDate;
    }

    @XmlAttribute(required = false)
    public Integer getId() {
        return id;
    }

    public void setId(Integer id) {
        this.id = id;
    }

    @XmlAttribute(required = true)
    public String getVersion() {
        return version;
    }

    public void setVersion(String version) {
        this.version = version;
    }

    @XmlAttribute(required = true)
    public String getDocumentNumber() {
        return documentNumber;
    }

    public void setDocumentNumber(String documentNumber) {
        this.documentNumber = documentNumber;
    }

    @JsonSerialize(using = JsonDateSerializer.class)
    @XmlAttribute(required = true)
    public Date getDocumentDate() {
        return documentDate;
    }

    @JsonDeserialize(using = JsonDateDeserializer.class)
    public void setDocumentDate(Date documentDate) {
        this.documentDate = documentDate;
    }

    @JsonIgnore
    public List<SubDocument> getSubDocumentList() {
        return subDocumentList;
    }

    public void setSubDocumentList(List<SubDocument> subDocumentList) {
        this.subDocumentList = subDocumentList;
    }
}

REST 应用程序配置

@Override
public Set<Class<?>> getClasses() {
    Set<Class<?>> resources = new java.util.HashSet<>();
    try {
        Class jacksonProvider = Class.forName("org.codehaus.jackson.jaxrs.JacksonJsonProvider");
        resources.add(jacksonProvider);
    } catch(ClassNotFoundException ex) {
        SLOGGER.fatal("could not find class JacksonJsonProvider", ex);
    }
    addMyOtherResourceClasses(resources);
    return resources;
}

还有 REST 接口：

@GET
@Consumes(MediaType.TEXT_PLAIN)
@Produces(MediaType.APPLICATION_JSON)
@Path("getDocumentById/{id}")
public Document getDocumentById(@PathParam("id") String id) {
    return sbDocuments.getDocumentById(id);
}

因此，即使 @JsonIgnore 注释出现在我的文档中，列表也会映射到输出。它确实适用于 @XmlTransient 注释，但由于也使用了 JAXB get，我无法添加该注释。

我使用 Codehaus 实现，但我也尝试过 FasterXML，两者结果相同。我应该怎么做才能解决这个问题？服务在 Glassfish 4.1 服务器上运行。

Answer 1

将@JsonIgnore 放在字段属性之上，而不是放在getter 方法上。 即

@JsonIgnore
private List<SubDocument> subDocumentList;