傑克遜序列化JAXB對象給出奇怪的結果

Question

我有一個JAXB對象。 當我序列化它時，結果很有趣！ 像這樣=>

{"formData":{
"preConditions":{
    "acceptTermsAndConditions":"<?xml version=\"1.0\" encoding=\"UTF-16\"?>\n<acceptTermsAndConditions>true</acceptTermsAndConditions>",
    "receivePromoEmail":"<?xml version=\"1.0\" encoding=\"UTF-16\"?>\n<receivePromoEmail>false</receivePromoEmail>"
}, etc...

而源XML僅具有true和false作為值：

  <formData>
    <preConditions>
      <acceptTermsAndConditions>true</acceptTermsAndConditions>
      <receivePromoEmail>false</receivePromoEmail>
    </preConditions> etc...

我的生成JSON的代碼如下：-

    Application application = (Application) JAXBUtil.getXMLAsApplication();
    ObjectMapper mapper = new ObjectMapper();
    AnnotationIntrospector introspector = new JaxbAnnotationIntrospector(TypeFactory.defaultInstance());
    // make deserializer use JAXB annotations (only)
    mapper.getDeserializationConfig().with(introspector);
    // make serializer use JAXB annotations (only)
    mapper.getSerializationConfig().with(introspector);


    try {
        mapper.writeValue(new File("application.json"), application);
    } catch (IOException e) {
        e.printStackTrace();
    }

其中前提條件類以上由JAXB2（XJC）生成。 以下是代碼段：-

@XmlAccessorType(XmlAccessType.FIELD)
    @XmlType(name = "", propOrder = {
        "acceptTermsAndConditions",
        "receivePromoEmail"
    })
    public static class PreConditions {

        @XmlElement(required = true)
        protected Object acceptTermsAndConditions;
        @XmlElement(required = true)
        protected Object receivePromoEmail;

        /**
         * Gets the value of the acceptTermsAndConditions property.
         * 
         * @return
         *     possible object is
         *     {@link Object }
         *     
         */
        public Object getAcceptTermsAndConditions() {
            return acceptTermsAndConditions;
        }

        /**
         * Sets the value of the acceptTermsAndConditions property.
         * 
         * @param value
         *     allowed object is
         *     {@link Object }
         *     
         */
        public void setAcceptTermsAndConditions(Object value) {
            this.acceptTermsAndConditions = value;
        }

        /**
         * Gets the value of the receivePromoEmail property.
         * 
         * @return
         *     possible object is
         *     {@link Object }
         *     
         */
        public Object getReceivePromoEmail() {
            return receivePromoEmail;
        }

        /**
         * Sets the value of the receivePromoEmail property.
         * 
         * @param value
         *     allowed object is
         *     {@link Object }
         *     
         */
        public void setReceivePromoEmail(Object value) {
            this.receivePromoEmail = value;
        }

    }

關於JSON為什么如此瘋狂的任何線索？

Answer 1

由於acceptTermsAndConditions的名義類型是java.lang.Object ，所以很難知道到底發生了什么。 序列化器將基於序列化時的運行時類型進行選擇-我的猜測是它將是DOM Document 。 在反序列化時，它不能很好地工作，而只是成為java.util.Map 。

因此，您可能需要更改架構以生成更特定的類型：帶有java.lang.Object任何內容都可能引起問題。

您可能需要查看序列化之前對象具有的實際Java類型。 那應該解釋奇怪的輸出是從哪里來的。 我認為這不是簡單的布爾值。