java - 无法在响应中附加 XML 元素

Question

我创建了一个接受 XML 数据的 Web 服务，经过服务器上的一些计算后，它在 xml 中添加了一些字段并将输出返回给客户端。我正在将 JAX-RS 用于 Restful Web 服务和 JAXB。

现在的问题是，当响应发送回客户端时，它不包含新更新的元素。

这是代码详细信息，

表示 XML 的类(使用 JAXB)

@XmlRootElement(name = "market")
@XmlAccessorType(XmlAccessType.FIELD)
public class IBMarketInfo {

    @XmlElement(name="contract")
    Contract m_Contract;

    @XmlElement(name="tickerId")
    int m_tickerId;

    @XmlElement(name="tickList")
    String m_genericTickList;

    @XmlElement(name="snapshot")
    boolean m_snapshot;


    @XmlElement(name="mktdata") // I AM NOT BE ABLE TO VIEW THIS ELEMENT IN THE RESPONSE
    List<String>m_Ticker;




    public IBMarketInfo(){

    }
 public void setTicker(String data){
         if (m_Ticker == null) {
                m_Ticker = new ArrayList<String>();
            }
      m_Ticker.add(data);

    }
    public List<String> getTicker(){

        if (m_Ticker == null) {
                m_Ticker = new ArrayList<String>();
            }

        return m_Ticker;
    }
    public void setTickerId(int tickerid){
        m_tickerId = tickerid;
    }
    public void setGenericTickList(String ticklist){
        m_genericTickList = ticklist;
    }
    public void setSnapshot(boolean snapshot){
        m_snapshot=snapshot;
    }
    public void setContract(Contract contract){
        m_Contract = contract;
    }
    public int getTickerId(){
            return m_tickerId;
    }
    public String getGenericTickList()    {
        return m_genericTickList;
    }
    public boolean getSnapShot(){
        return m_snapshot;
    }
    public Contract getContract(){
        return m_Contract;
    }


}

Restful Webservices 请求函数

public JAXBElement<IBMarketInfo>getMarketData(JAXBElement<IBMarketInfo> info){

    MainAccess ma = new MainAccess(); // MainAccess Will pull the data from external server
    IBMarketInfo market = info.getValue(); 

   ma.onRequestData(market.getTickerId(),market.getContract(),market.getGenericTickList(),
   market.getSnapShot()); // set the user given input from xml 

  return info;
}

在 MainAccess 类中我正在执行以下操作

 public class MainAccess {

   private IBMarketInfo m_marketInfo  = new IBMarketInfo(); //declaring in class

    // as an when data comes these following functions will add data into List
    public void tickSize( int tickerId, int field, int size) {

        String msg = EWrapperMsgGenerator.tickSize( tickerId, field, size);
        m_marketInfo.setTicker(msg); // setting m_Ticker 

    }
    public void tickPrice( int tickerId, int field, double price, int canAutoExecute) {

        String msg = EWrapperMsgGenerator.tickPrice( tickerId, field, price, canAutoExecute);

        m_marketInfo.setTicker(msg); //setting m_Ticker 

    }
}

我创建了以下市场信息对象并尝试在代码之间设置列表的值

private IBMarketInfo m_marketInfo  = new IBMarketInfo();
 m_marketInfo.setTicker(msg);

XML 请求

问题是我得到了相同的 XML，但没有附加 mktdata

<?xml version="1.0" encoding="UTF-8"?>
<market>
    <contract>
        <symbol>IBM</symbol>
        <sectype>STK</sectype>
        <exchange>SMART</exchange>
        <currency>USD</currency>    
    </contract> 
        <tickerId>1</tickerId>
    <tickList>1212,12121</tickList>
    <snapshot>false</snapshot>
<ticker-data></ticker-data>
</market>

Answer 1

您的问题出在以下代码中。 MainAccess 创建一个 IBMaretInfo，但您返回的是未经修改传入的 IBMarkettInfo。

public JAXBElement<IBMarketInfo>getMarketData(JAXBElement<IBMarketInfo> info){

    MainAccess ma = new MainAccess(); // MainAccess Will pull the data from external server
    IBMarketInfo market = info.getValue(); 

   ma.onRequestData(market.getTickerId(),market.getContract(),market.getGenericTickList(),
   market.getSnapShot()); // set the user given input from xml 

  return info;
}

<小时/>

您的模型似乎正确映射，因为当我运行以下代码时:

import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;

public class Demo {

    public static void main(String[] args) throws Exception  {
        JAXBContext jc = JAXBContext.newInstance(IBMarketInfo.class);

        IBMarketInfo ibmi = new IBMarketInfo();
        ibmi.setTicker("FOO");
        ibmi.setTicker("BAR");

        Marshaller marshaller = jc.createMarshaller();
        marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
        marshaller.marshal(ibmi, System.out);
    }

}

我得到以下输出:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<market>
    <tickerId>0</tickerId>
    <snapshot>false</snapshot>
    <mktdata>FOO</mktdata>
    <mktdata>BAR</mktdata>
</market>