XStream 不从 XML 转换值

Question

我正在尝试将 XML 文件转换为我的 2 个类，如下所示：

@XStreamAlias("citizenship")
class PersonCitizenship {
    private String citizenship;
}
@XStreamAlias("person")
class Person {
    private Set<PersonCitizenship> citizenships;
    private String citizenship;
    private String citizenshipType;
}

我的 XML 文件如下所示：

<?xml version="1.0" encoding="UTF-8"?>
<person>
    <citizenships>
        <citizenship>032</citizenship>
    </citizenships>
    <citizenship>123</citizenship>
    <citizenshipType>2</citizenshipType>
</person>

转换后，我得到 Person 具有以下数据的对象： citizenshipType = 2; citizenship = 123 和 Set 的 citizenships 在 citizenship 字段上具有 null 值。为什么会这样？

Answer 1

你需要添加：

@XStreamImplicit
private Set<PersonCitizenship> citizenships;

否则 XStream 期望类似：

<person>
  <citizenships>
    <citizenship>
      <citizenship>032</citizenship>
    </citizenship>
  </citizenships>
  <citizenship>123</citizenship>
  <citizenshipType>2</citizenshipType>
</person>