JAXB-在XSD：all中具有无界maxOccurs的元素

Question

@XmlRootElement(name = "SearchParams")
@XmlType(propOrder = {})
public class SearchParams {

  private String firstname;
  private String lastname;
  private List<String> role;

  ...
}

Answer 1

假设您仍然可以修改此模型，那么您可以将角色列表包装为它自己的类型，这样您将得到一个 元素，其中包含 的列表

<SearchParams>
    <firstname>firstname</firstname>
    <lastname>lastname</lastname>
    <roles>
        <role>role</role>
    </roles>
</SearchParams>

xsd只是

<xsd:schema ... >

    <xsd:element name="SearchParams">
        <xsd:complexType>
            <xsd:all>
                <xsd:element name="firstname" type="xsd:string" />
                <xsd:element name="lastname" type="xsd:string" />
                <xsd:element name="roles" type="Roles" />
            </xsd:all>
        </xsd:complexType>
    </xsd:element>

    <xsd:complexType name="Roles">
        <xsd:sequence>
            <xsd:element name="role" type="xsd:string" maxOccurs="unbounded" />
        </xsd:sequence>
    </xsd:complexType>

</xsd:schema>

你要上两节课。包含列表的roles类。海事组织，这是一个更干净的方法。（您可以将roles设置为匿名，但这样您就只能使用静态内部类了）

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {

})
@XmlRootElement(name = "SearchParams")
public class SearchParams {

    @XmlElement(required = true)
    protected String firstname;
    @XmlElement(required = true)
    protected String lastname;
    @XmlElement(required = true)
    protected Roles roles;
    ...
}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Roles", propOrder = {
    "role"
})
public class Roles {

    @XmlElement(required = true)
    protected List<String> role;
    ...
}

您可以使用@xmllist。

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {

})
@XmlRootElement(name = "SearchParams")
public class SearchParams {

    @XmlElement(required = true)
    protected String firstname;
    @XmlElement(required = true)
    protected String lastname;
    @XmlList
    @XmlElement(required = true)
    protected List<String> role;
    ...
}

xsd看起来像

<xsd:element name="SearchParams">
    <xsd:complexType>
        <xsd:all>
            <xsd:element name="firstname" type="xsd:string" />
            <xsd:element name="lastname" type="xsd:string" />
            <xsd:element name="role">
                <xsd:simpleType>
                    <xsd:list itemType="xsd:string" />
                </xsd:simpleType>
            </xsd:element>
        </xsd:all>
    </xsd:complexType>
</xsd:element>

注意：正如这里提到的，这种方法是“危险的”，我的文章开头的解决方案比使用字符串类型的列表更好。但在你的具体情况下，不确定我是否看到了另一种方式