Java/XML 问题

Question

我在通过 Java 代码生成 XML 时遇到问题。我有一门针对SailingAvailabilityResponseMessage 的课程。在这个类中，还有几个其他类也用于我正在编写的方法中。这是SailingAvailabilityResponseMessage 类的外观：

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlType;

@XmlType(propOrder={"type", "agency", "version", "release", "processingInfo", "advisoryMessage", "packageDescription", "sailingGroup", "registrationInformation"})
public class SailingAvailabilityResponseMessage {


 private ProcessingInfo processingInfo;
 private AdvisoryMessage advisoryMessage;
 private PackageDescription packageDescription;
 private SailingGroupResponse[] sailingGroup;
 private RegistrationInformation registrationInformation;


 String type;

 @XmlAttribute
 public String getType() {
  return type;
 }

我遇到的具体问题与SailingGroupResponse[] sailingGroup; 有关 SailingGroupResponse[] 继承自 sailingGroup。这是sailingGroup 的样子：

public class SailingGroup {

 private SailingDescription sailingDescription;

 public SailingDescription getSailingDescription() {
  return sailingDescription;
 }

 public void setSailingDescription(SailingDescription sailingDescription) {
  this.sailingDescription = sailingDescription;
 }

这是SailingGroupResponse[] 的样子：

import javax.xml.bind.annotation.XmlType;

@XmlType(propOrder={"sailingInformation", "diningDetails", "modeOfTransportation", "currencyInfo", "packageDescription"})
public class SailingGroupResponse extends SailingGroup {

 private SailingInformation sailingInformation;
 private DiningDetails diningDetails;
 private ModeOfTransportation modeOfTransportation;
 private CurrencyInfo currencyInfo;
 private PackageDescription packageDescription;

我在生成 XML 时遇到的问题是我期望得到一个 <sailingGroup> 的标签，但后来我也得到了一个我不想要的标签 <sailingGroupResponse>，因为它不是其中的一部分我遵循的原始规格。我正在通过 WebSphere RDi 生成 XML。我使用的是 SOAP 1.2，但我尝试为其开发的业务伙伴使用的是 SOAP 1.1，因此我不能使用 JAX-WS 运行时，而是必须使用 JAX-RPC（apache AXIS 不允许我使用产生）。

是否有人熟悉 JAX-RPC 运行时以及与我所问的问题类似的问题？如果有人知道我可以访问的好网站以获取更多信息，我愿意进一步研究，尽管到目前为止我在找到答案方面没有取得太大成功。

谢谢，

卡伦

Answer 1

如您所见，将多态性引入 JAXB 注释类通常会导致复杂性。

试试这个：

@XmlElement(type = SailingGroup.class)
public SailingGroupResponse[] getSailingGroup() {
    return sailingGroup;
}

您可能还需要将@XmlType 添加到 SailingGroup。

Answer 2

您确定 JAXB 正在生成 sailingGroupResponse 标记吗？当我运行以下精简示例时，我得到了合理的 XML：

XML 输出

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<root>
    <sailingGroup/>
    <sailingGroup/>
</root>

演示代码

import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.namespace.QName;

public class Demo {

    public static void main(String[] args) throws Exception {

        SailingAvailabilityResponseMessage sarm = new SailingAvailabilityResponseMessage();
        SailingGroupResponse[] sgr = new SailingGroupResponse[2];
        sgr[0] = new SailingGroupResponse();
        sgr[1] = new SailingGroupResponse();
        sarm.setSailingGroup(sgr);

        JAXBElement<SailingAvailabilityResponseMessage> rootElement = new JAXBElement<SailingAvailabilityResponseMessage>(new QName("root"), SailingAvailabilityResponseMessage.class, sarm);

        JAXBContext jc = JAXBContext.newInstance(SailingAvailabilityResponseMessage.class, SailingGroup.class, SailingGroupResponse.class);
        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(rootElement, System.out);

    }

}

SailingAvailabilityResponseMessage

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlType;

@XmlType(propOrder = { "type", "sailingGroup"})
public class SailingAvailabilityResponseMessage {

    private SailingGroupResponse[] sailingGroup;

    String type;

    public SailingGroupResponse[] getSailingGroup() {
        return sailingGroup;
    }

    public void setSailingGroup(SailingGroupResponse[] sailingGroup) {
        this.sailingGroup = sailingGroup;
    }

    @XmlAttribute
    public String getType() {
        return type;
    }

    public void setType(String type) {
        this.type = type;
    }

}

SalingGroupResponse

public class SailingGroupResponse extends SailingGroup {

}

SailingGroup

public class SailingGroup {

}