Jackson XmlMapper 生成的 XML 条目顺序错误

huangapple
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英文:

Jackson XmlMapper generates wrong XML entries order

问题

  1. 使用Java Jackson的XmlMapper生成XML字符串时，我遇到了一个问题：它生成的XML字符串中条目的顺序是错误的，尽管我使用了@JsonPropertyOrder，并且类内部的成员也是需要的顺序。
  2. 请参考我的代码：
  4. @JsonPropertyOrder({ "craneNumber", "moveType", "reference", "unitNumber", "ISOCode", "IMOLabels", "seal", "doorDirection" })
  5. public class OcrDataResultUnit {
  6.     @JacksonXmlElementWrapper(localName="unit")
  7.     private String craneNumber;
  8.     private String moveType;
  9.     private String reference;
  10.     private String unitNumber;
  11.     @JsonProperty("ISOCode")
  12.     private String isoCode;
  13.     @JacksonXmlElementWrapper(localName="IMOLabels")
  14.     @JsonProperty("DGSIMOClass")
  15.     private List<String> imoLabels = new ArrayList<>();
  16.     @JsonProperty("seal")
  17.     private String seal;
  18.     @JsonProperty("doorDirection")
  19.     private String doorDirection;
  21.     // 所有的getter和setter...
  23. Usage:
  25.     XmlMapper mapper = new XmlMapper();
  26.     String msgXml = mapper.writeValueAsString(this);
  28. Result:
  30. <unit>
  31. <craneNumber>QC01</craneNumber>
  32. <moveType>D</moveType>
  33. <reference>12345678901234567890123456789012</reference>
  34. <unitNumber>ABCD00001234</unitNumber>
  35. <ISOCode>22G1</ISOCode>
  36. <seal>Y</seal>
  37. <doorDirection>H</doorDirection>
  38. <IMOLabels>
  39. <DGSIMOClass>1.5</DGSIMOClass>
  40. <DGSIMOClass>2.1</DGSIMOClass>
  41. </IMOLabels>
  42. </unit>
  44. * 在最后两个成员上不加 @JsonProperty 我得到了相同的结果。这是一个尝试。
  45. * 这个结构是更大的XML结构的一部分。
  46. * 同样将 @JsonProperty 替换为 @JacksonXmlProperty：结果相同。
  47. * 据我所见，@JsonPropertyOrder 在XML中也是正确使用的。
  49. 是否有人有想法？
  50. 也许我只是疏忽了 - 实际上我希望是这样的 :-)
  52. 谢谢并致以最诚挚的问候
英文:

I have an issue with generating a XML string with the Java Jackson XmlMapper: It generates the wrong order of entries in the XML string, nevertheless I use @JsonPropertyOrder and the members are in the needed order inside the class.
Please see my code:

  1. @JsonPropertyOrder({ &quot;craneNumber&quot;, &quot;moveType&quot;, &quot;reference&quot;, &quot;unitNumber&quot;, &quot;ISOCode&quot;, &quot;IMOLabels&quot;, &quot;seal&quot;, &quot;doorDirection&quot; })
  2. public class OcrDataResultUnit {
  3. @JacksonXmlElementWrapper(localName=&quot;unit&quot;)
  4. private String craneNumber;
  5. private String moveType;
  6. private String reference;
  7. private String unitNumber;
  8. @JsonProperty(&quot;ISOCode&quot;)
  9. private String isoCode;
  10. @JacksonXmlElementWrapper(localName=&quot;IMOLabels&quot;)
  11. @JsonProperty(&quot;DGSIMOClass&quot;)
  12. private List&lt;String&gt; imoLabels = new ArrayList&lt;&gt;();
  13. @JsonProperty(&quot;seal&quot;)
  14. private String seal;
  15. @JsonProperty(&quot;doorDirection&quot;)
  16. private String doorDirection;
  17. // all getters and setters ...

Usage:

  1.     XmlMapper mapper = new XmlMapper();
  2. String msgXml = mapper.writeValueAsString(this);

Result:

  1. &lt;unit&gt;
  2. &lt;craneNumber&gt;QC01&lt;/craneNumber&gt;
  3. &lt;moveType&gt;D&lt;/moveType&gt;
  4. &lt;reference&gt;12345678901234567890123456789012&lt;/reference&gt;
  5. &lt;unitNumber&gt;ABCD00001234&lt;/unitNumber&gt;
  6. &lt;ISOCode&gt;22G1&lt;/ISOCode&gt;
  7. &lt;seal&gt;Y&lt;/seal&gt;
  8. &lt;doorDirection&gt;H&lt;/doorDirection&gt;
  9. &lt;IMOLabels&gt;
  10. &lt;DGSIMOClass&gt;1.5&lt;/DGSIMOClass&gt;
  11. &lt;DGSIMOClass&gt;2.1&lt;/DGSIMOClass&gt;
  12. &lt;/IMOLabels&gt;
  13. &lt;/unit&gt;
  • I get the same result without the @JsonProperty on the last to members. That was a try.
  • The structure is part of a bigger XML structure.
  • Also replaced @JsonProperty with @JacksonXmlProperty: Same result.
  • As far as I see @JsonPropertyOrder is correct to be used for XML as well.

Does anybody have an idea?
Maybe I am just blind - actually I hope so Jackson XmlMapper 生成的 XML 条目顺序错误

Thank you and best regards

答案1

得分: 0

在您的JsonPropertyOrder注解中，属性被称为"DGSIMOClass"，而不是"IMOLabels"。您应该将其替换为正确的名称。

英文:

In your JsonPropertyOrder annotation, the property is called "DGSIMOClass", not "IMOLabels". You should switch it out for the correct name.

huangapple
  • 本文由 发表于 2020年9月4日 17:58:31
  • 转载请务必保留本文链接：https://go.coder-hub.com/63738913.html
  • jackson
  • java
  • xml
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