XML不是由Java以正確的順序生成的

Question

我正在使用xstream從java對象生成xml，下面是從java對象生成的xml

<brokermail>
  <invoiceReferenceNotificationMessage>
    <com.absfm.ice.ioa.jms.InvoiceReferenceNotificationMessage>
      <InvoiceReference>SM/829709/0315</InvoiceReference>
      <ABSReference>IRMAR157311</ABSReference>
      <Currency>GBP</Currency>
      <InvoiceAmount>2546.0</InvoiceAmount>
      <PaidAmount>1245.0</PaidAmount>
      <BalanceAmount>0.0</BalanceAmount>
      <ValueDate>2015-05-23 20:07:20.78 IST</ValueDate>
      <Remarks>abc</Remarks>
    </com.rbsfm.ice.ioa.jms.InvoiceReferenceNotificationMessage>
    <com.rbsfm.ice.ioa.jms.InvoiceReferenceNotificationMessage>
      <InvoiceReference>SM/15</InvoiceReference>
      <ABSReference>I157311</ABSReference>
      <Currency>EUR</Currency>
      <InvoiceAmount>255546.0</InvoiceAmount>
      <PaidAmount>125545.0</PaidAmount>
      <BalanceAmount>0.0</BalanceAmount>
      <ValueDate>2015-05-23 20:07:20.78 IST</ValueDate>
      <Remarks>abERRc</Remarks>
    </com.absfm.ice.ioa.jms.InvoiceReferenceNotificationMessage>
  </invoiceReferenceNotificationMessage>
</brokermail>

但我希望以以下方式生成xml

<brokermail>

  <invoiceReferenceNotificationMessage>
   <InvoiceReference>SM/829709/0315</InvoiceReference>
      <ABSReference>IRMAR157311</ABSReference>
      <Currency>GBP</Currency>
      <InvoiceAmount>2546.0</InvoiceAmount>
      <PaidAmount>1245.0</PaidAmount>
      <BalanceAmount>0.0</BalanceAmount>
      <ValueDate>2015-05-23 20:38:35.110 IST</ValueDate>
      <Remarks>abc</Remarks>
     </invoiceReferenceNotificationMessage>

     <invoiceReferenceNotificationMessage>
        <InvoiceReference>SM/15</InvoiceReference>
      <ABSReference>I157311</ABSReference>
      <Currency>EUR</Currency>
      <InvoiceAmount>255546.0</InvoiceAmount>
      <PaidAmount>125545.0</PaidAmount>
      <BalanceAmount>0.0</BalanceAmount>
      <ValueDate>2015-05-23 20:38:35.110 IST</ValueDate>
      <Remarks>abERRc</Remarks>
  </invoiceReferenceNotificationMessage>

</brokermail>

現在，如上圖所示，我希望以上述方式生成xml，而現在還沒有發生。 您能告訴我我需要在下面的pojo中進行哪些更改才能以上述方式獲取xml。 以下是我的pojo

  public class Mail {


           private  List<InvoiceReferenceNotificationMessage> invoiceReferenceNotificationMessage = new ArrayList<InvoiceReferenceNotificationMessage>();

            public List<InvoiceReferenceNotificationMessage> getInvoiceReferenceNotificationMessages() {
                return invoiceReferenceNotificationMessage;
            }

            public void addInvoiceReferenceNotificationMessages(List<InvoiceReferenceNotificationMessage> invoiceReferenceNotificationMessages) {
                this.invoiceReferenceNotificationMessage = invoiceReferenceNotificationMessages;
            }
    }

這是正在發生的主要方法調用

下面是通過其以下xstream生成xml的主要類。

InvoiceReferenceNotificationMessage invoiceReferenceNotificationMessage = new InvoiceReferenceNotificationMessage();
        invoiceReferenceNotificationMessage.setInvoiceReference("SM/854565");
        invoiceReferenceNotificationMessage.ABSReference("IRM5454311");
        invoiceReferenceNotificationMessage.setCurrency("GBP");
        invoiceReferenceNotificationMessage.setInvoiceAmount(255446);
        invoiceReferenceNotificationMessage.setPaidAmount(12445);
        invoiceReferenceNotificationMessage.setBalanceAmount(0);
        invoiceReferenceNotificationMessage.setValueDate(new Date());
        invoiceReferenceNotificationMessage.setRemarks("abc");


        InvoiceReferenceNotificationMessage invoiceReferenceNotificationMessage1 = new InvoiceReferenceNotificationMessage();
        invoiceReferenceNotificationMessage1.setInvoiceReference("SM/14545");
        invoiceReferenceNotificationMessage1.ABSReference("I15745311");
        invoiceReferenceNotificationMessage1.setCurrency("EUR");
        invoiceReferenceNotificationMessage1.setInvoiceAmount(2555546);
        invoiceReferenceNotificationMessage1.setPaidAmount(125545);
        invoiceReferenceNotificationMessage1.setBalanceAmount(0);
        invoiceReferenceNotificationMessage1.setValueDate(new Date());
        invoiceReferenceNotificationMessage1.setRemarks("abERRc");

        List<InvoiceReferenceNotificationMessage> invoiceReferenceNotificationMessagest = new ArrayList<InvoiceReferenceNotificationMessage>();
        invoiceReferenceNotificationMessagest.add(invoiceReferenceNotificationMessage);
        invoiceReferenceNotificationMessagest.add(invoiceReferenceNotificationMessage1);

        Mail m = new Mail();
        m.addInvoiceReferenceNotificationMessages(invoiceReferenceNotificationMessagest);


      XStream xstream = new XStream();
        xstream.alias("brokermail",Mail.class);
        String abc = xstream.toXML(m);
        System.out.println(abc);

伙計們請告知我在上面的pojos中需要做些什么更改以獲取所需的xml（如我所示）

Answer 1

為了解決該問題，並為您的收集項目使用一個相關的項目名稱，而不要使用每個項目的完全限定的類名稱：

• 使用合適的名稱用@XStreamImplicit注釋您的項目集合實例字段：

   public class Mail { @XStreamImplicit( itemFieldName = "invoiceReferenceNotificationMessage" ) private List<InvoiceReferenceNotificationMessage> invoiceReferenceNotificationMessage; //... } 

• 在序列化對象之前，請在xstream實例上調用#processAnnotations(Class)方法以觸發元數據處理：

   Mail m = new Mail(); m.addInvoiceReferenceNotificationMessages(invoiceReferenceNotificationMessagest); XStream xstream = new XStream(); xstream.alias("brokermail", Mail.class); xstream.processAnnotations(Mail.class); String abc = xstream.toXML(m); System.out.println(abc);