Java JAXB Reach嵌套XmlElement示例

下面是我的XmlRoot类：

    @XmlRootElement(name = "IGE")
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "IGEType", propOrder = { "altin" })
public class IGEType {


    @XmlElement(name = "ALTIN", required = true)
    protected List<ALTINType> altin;

    public List<ALTINType> getALTIN() {
        if (altin == null) {
            altin = new ArrayList<ALTINType>();
        }
        return this.altin;
    }
}

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

    @XmlElement(name = "SEANSytl", required = true)
    protected SEANSytlType seanSytl;

}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "SEANSytlType", propOrder = { "birim", "oncekiKapanis", "enDusuk", "enYuksek", "kapanis", "agirlikliOrtalama", "islemHacmi", "islemMiktari", "bicim", "gram", "islemSayisi" })
public class SEANSytlType {

    @XmlElement(required = true)
    protected String birim;
    @XmlElement(name = "onceki_kapanis", required = true)
    protected BigDecimal oncekiKapanis;
    @XmlElement(name = "en_dusuk", required = true)
    protected BigDecimal enDusuk;
    @XmlElement(name = "en_yuksek", required = true)
    protected BigDecimal enYuksek;
    @XmlElement(required = true)
    protected BigDecimal kapanis;
    @XmlElement(name = "agirlikli_ortalama", required = true)
    protected BigDecimal agirlikliOrtalama;
    @XmlElement(name = "islem_hacmi", required = true)
    protected BigDecimal islemHacmi;
    @XmlElement(name = "islem_miktari", required = true)
    protected BigDecimal islemMiktari;
    @XmlElement(name = "BICIM", required = true)
    protected BigDecimal bicim;
    @XmlElement(name = "GRAM", required = true)
    protected BigDecimal gram;
    @XmlElement(name = "islem_sayisi")
    protected int islemSayisi;
}

@Override
    public void handleXMLtoIABData(RequestTcmbXMLData req) throws HmnServiceException {

        try {
            JAXBContext jaxbContext = JAXBContext.newInstance(IGEType.class);

            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
            File XMLfile = new File("C:\\Users\\U067944\\Desktop\\IAB_bülten.xml");
            IGEType igeRoot = (IGEType) jaxbUnmarshaller.unmarshal(XMLfile);


            **List<SEANSytlType> listofAltinYtl = (List<SEANSytlType>) ((List<ALTINType>) igeRoot.getALTIN()).getSEANSytl();**


            for (SEANSytlType altinYtl : listofAltinYtl) {


            }

        } catch (JAXBException e) {

            e.printStackTrace();
        }
    }

最后，根的继承者的继承者类：

    @XmlRootElement(name = "IGE")
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "IGEType", propOrder = { "altin" })
public class IGEType {


    @XmlElement(name = "ALTIN", required = true)
    protected List<ALTINType> altin;

    public List<ALTINType> getALTIN() {
        if (altin == null) {
            altin = new ArrayList<ALTINType>();
        }
        return this.altin;
    }
}

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

    @XmlElement(name = "SEANSytl", required = true)
    protected SEANSytlType seanSytl;

}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "SEANSytlType", propOrder = { "birim", "oncekiKapanis", "enDusuk", "enYuksek", "kapanis", "agirlikliOrtalama", "islemHacmi", "islemMiktari", "bicim", "gram", "islemSayisi" })
public class SEANSytlType {

    @XmlElement(required = true)
    protected String birim;
    @XmlElement(name = "onceki_kapanis", required = true)
    protected BigDecimal oncekiKapanis;
    @XmlElement(name = "en_dusuk", required = true)
    protected BigDecimal enDusuk;
    @XmlElement(name = "en_yuksek", required = true)
    protected BigDecimal enYuksek;
    @XmlElement(required = true)
    protected BigDecimal kapanis;
    @XmlElement(name = "agirlikli_ortalama", required = true)
    protected BigDecimal agirlikliOrtalama;
    @XmlElement(name = "islem_hacmi", required = true)
    protected BigDecimal islemHacmi;
    @XmlElement(name = "islem_miktari", required = true)
    protected BigDecimal islemMiktari;
    @XmlElement(name = "BICIM", required = true)
    protected BigDecimal bicim;
    @XmlElement(name = "GRAM", required = true)
    protected BigDecimal gram;
    @XmlElement(name = "islem_sayisi")
    protected int islemSayisi;
}

@Override
    public void handleXMLtoIABData(RequestTcmbXMLData req) throws HmnServiceException {

        try {
            JAXBContext jaxbContext = JAXBContext.newInstance(IGEType.class);

            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
            File XMLfile = new File("C:\\Users\\U067944\\Desktop\\IAB_bülten.xml");
            IGEType igeRoot = (IGEType) jaxbUnmarshaller.unmarshal(XMLfile);


            **List<SEANSytlType> listofAltinYtl = (List<SEANSytlType>) ((List<ALTINType>) igeRoot.getALTIN()).getSEANSytl();**


            for (SEANSytlType altinYtl : listofAltinYtl) {


            }

        } catch (JAXBException e) {

            e.printStackTrace();
        }
    }

Myhandler类：

    @XmlRootElement(name = "IGE")
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "IGEType", propOrder = { "altin" })
public class IGEType {


    @XmlElement(name = "ALTIN", required = true)
    protected List<ALTINType> altin;

    public List<ALTINType> getALTIN() {
        if (altin == null) {
            altin = new ArrayList<ALTINType>();
        }
        return this.altin;
    }
}

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

    @XmlElement(name = "SEANSytl", required = true)
    protected SEANSytlType seanSytl;

}

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "SEANSytlType", propOrder = { "birim", "oncekiKapanis", "enDusuk", "enYuksek", "kapanis", "agirlikliOrtalama", "islemHacmi", "islemMiktari", "bicim", "gram", "islemSayisi" })
public class SEANSytlType {

    @XmlElement(required = true)
    protected String birim;
    @XmlElement(name = "onceki_kapanis", required = true)
    protected BigDecimal oncekiKapanis;
    @XmlElement(name = "en_dusuk", required = true)
    protected BigDecimal enDusuk;
    @XmlElement(name = "en_yuksek", required = true)
    protected BigDecimal enYuksek;
    @XmlElement(required = true)
    protected BigDecimal kapanis;
    @XmlElement(name = "agirlikli_ortalama", required = true)
    protected BigDecimal agirlikliOrtalama;
    @XmlElement(name = "islem_hacmi", required = true)
    protected BigDecimal islemHacmi;
    @XmlElement(name = "islem_miktari", required = true)
    protected BigDecimal islemMiktari;
    @XmlElement(name = "BICIM", required = true)
    protected BigDecimal bicim;
    @XmlElement(name = "GRAM", required = true)
    protected BigDecimal gram;
    @XmlElement(name = "islem_sayisi")
    protected int islemSayisi;
}

@Override
    public void handleXMLtoIABData(RequestTcmbXMLData req) throws HmnServiceException {

        try {
            JAXBContext jaxbContext = JAXBContext.newInstance(IGEType.class);

            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
            File XMLfile = new File("C:\\Users\\U067944\\Desktop\\IAB_bülten.xml");
            IGEType igeRoot = (IGEType) jaxbUnmarshaller.unmarshal(XMLfile);


            **List<SEANSytlType> listofAltinYtl = (List<SEANSytlType>) ((List<ALTINType>) igeRoot.getALTIN()).getSEANSytl();**


            for (SEANSytlType altinYtl : listofAltinYtl) {


            }

        } catch (JAXBException e) {

            e.printStackTrace();
        }
    }

@覆盖
public void handlexmltoabdata（RequestTcmbXMLData req）引发HmnServiceException{
试一试{
JAXBContext JAXBContext=JAXBContext.newInstance（IGEType.class）；
解组器jaxbUnmarshaller=jaxbContext.createUnmarshaller（）；
File XMLfile=新文件（“C:\\Users\\U067944\\Desktop\\IAB_ülten.xml”）；
IGEType IGEOOT=（IGEType）jaxbUnmarshaller.unmarshal（XMLfile）；
**List listofAltinYtl=（List）（（List）IGEOOT.getALTIN（））.getSEANSytl（）**
对于（SEANSytlType altinYtl:listofAltinYtl）{
}
}捕获（JAXBEException e）{
e、 printStackTrace（）；
}
}

在我的处理程序类中，我试图到达最后一个后续类（List SEANSytlType），但它不起作用。 我得到这个错误：

jvmId:[300]，transactionId:[3005624292568000]。根本原因：[java.lang.ClassCastException:java.util.ArrayList无法强制转换为com.ykb.hmn.mdt.marketdata.xmlparser.iab.ALTINType]

我也在handler中尝试了这一点，但相同：

IGEType IGEOOT=（IGEType）jaxbUnmarshaller.unmarshal（XMLfile）；
字符串inputDate=IGEOOT.GetIgebultengunt（）.getGun2（）；
List listAltinRoot=（List）igeRoot.getALTIN（）；
List listofAltinYtl=（List）listAltinRoot.get（0）；

我错在哪里？ 提前谢谢

基于示例类 IGEType

然后是SEANSytlType

<!-- language: java -->      
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "SEANSytl", propOrder = { "birim"})
public class SEANSytlType {

    @XmlElement(required = true)
    protected String birim;
}

@XmlAccessorType（XmlAccessType.FIELD）
@XmlType（name=“SEANSytl”，proporter={“birim”}）
公共类SEANSytlType{
@XmlElement（必需=true）
受保护字符串birim；
}

然后对这个类进行测试

 <!-- language: java --> 
 public static void main(String[] args) {
    // TODO Auto-generated method stub
    try {
        JAXBContext jaxbContext = JAXBContext.newInstance(IGEType.class);

        Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();
        File XMLfile = new File("sample1.xml");
        IGEType igeRoot = (IGEType) jaxbUnmarshaller.unmarshal(XMLfile);

        List<ALTINType> listAltinRoot = igeRoot.getALTIN();

        // here you ll be have error ///
//            List<SEANSytlType> listofAltinYtl =  (List<SEANSytlType>)      listAltinRoot.get(0);
//
//            for (SEANSytlType altinYtl : listofAltinYtl) {
//              System.out.println(altinYtl.birim);
//            }

    } catch (JAXBException e) {

        e.printStackTrace();
    }
}

公共静态void main（字符串[]args）{
//TODO自动生成的方法存根
试一试{
JAXBContext JAXBContext=JAXBContext.newInstance（IGEType.class）；
解组器jaxbUnmarshaller=jaxbContext.createUnmarshaller（）；
File XMLfile=新文件（“sample1.xml”）；
IGEType IGEOOT=（IGEType）jaxbUnmarshaller.unmarshal（XMLfile）；
List listAltinRoot=igeRoot.getALTIN（）；
//这是你的错误///
//List listofAltinYtl=（List）listAltinRoot.get（0）；
//
//对于（SEANSytlType altinYtl:listofAltinYtl）{
//System.out.println（altinYtl.birim）；
//            }
}捕获（JAXBEException e）{
e、 printStackTrace（）；
}
}

结束示例xml

<?xml version="1.0" encoding="UTF-8"?>
<IGE>
    <Altin>
        <SEANSytl>
            <birim>cccc</birim>
        </SEANSytl>
    </Altin>
    <Altin>
            <SEANSytl>
            <birim>dddd</birim>
        </SEANSytl>
    </Altin>

</IGE>

中交
dddd

---

所以最基本的问题是，在根目录（IGE）中有子对象列表altin，但在altin对象中只有一个子对象seansylt不像在altin中那样在列表中，所以请修复altin对象添加列表并查看我的示例

谢谢您的解释和回答