无法使用JAXB获取属性值（对于父类中的属性）

Question

我正在尝试使用JAXB读取一个xml。

我正面临着一个奇怪的问题，父母的属性没有被读取，但子类的属性被读取。 我曾经参考论坛，但这似乎是一个奇怪的。

任何人都可以让我知道我在做什么错误。

XML。

<?xml version="1.0" encoding="UTF-8"?> 
<PhoneDirectory> 
<Exchange exchangeName="ashfield2133">Ashfield</Exchange> 
<PhoneNumber id="23" number="0489524401"> 
<FirstName>Test</FirstName> 
<LastName>Test</LastName> 
<Address>#34,rt road, State,Country,22344 </Address> 
</PhoneNumber> 

<PhoneNumber id="88" number="0409545401"> 
<FirstName>Testf2</FirstName> 
<LastName>Testl2</LastName> 
<Address>St 2 , State,Country,34555</Address> 
</PhoneNumber> 


<PhoneNumber id="88" number="0446775401"> 
<FirstName>Testf3</FirstName> 
<LastName>Testl3</LastName> 
<Address>St 3 , State,Country,546777</Address> 
</PhoneNumber> 

</PhoneDirectory> 

PhoneDirectory类

package com.test.phoneDirectory.dataclass; 

import javax.xml.bind.annotation.XmlAccessType; 
import javax.xml.bind.annotation.XmlAccessorType; 
import javax.xml.bind.annotation.XmlAttribute; 
import javax.xml.bind.annotation.XmlElement; 
import javax.xml.bind.annotation.XmlRootElement; 
import java.util.List; 


@XmlRootElement(name="PhoneDirectory") 
public class PhoneDirectory { 

    private String exchange; 
    private String exchangeName; 

    @XmlElement(name="Exchange") 
    public String getExchange() { 
     return exchange; 
    } 

    public void setExchange(String exchange) { 
     this.exchange = exchange; 
    } 

    @XmlAttribute(name="exchangeName") 
    public String getExchangeName() { 
     return exchangeName; 
    } 

    public void setExchangeName(String exchangename) { 
     this.exchangeName = exchangename; 
    } 

    private List<PhoneNumber> phoneNumber; 

    @XmlElement(name="PhoneNumber") 
    public List<PhoneNumber> getPhoneNumber() { 
     return phoneNumber; 
    } 

    public void setPhoneNumber(List<PhoneNumber> phoneNumber) { 
     this.phoneNumber = phoneNumber; 
    } 

} 

******中国类

package com.test.phoneDirectory.dataclass; 

import javax.xml.bind.annotation.XmlAttribute; 
import javax.xml.bind.annotation.XmlElement; 
import javax.xml.bind.annotation.XmlRootElement; 

@XmlRootElement(name="PhoneNumber") 
public class PhoneNumber { 

    private String id; 
    private String number; 

    private String firstName; 
    private String lastName; 
    private String address; 

    @XmlAttribute(name="id") 
    public String getId() { 
     return id; 
    } 
    public void setId(String id) { 
     this.id = id; 
    } 

    @XmlAttribute(name="number") 
    public String getNumber() { 
     return number; 
    } 

    public void setNumber(String number) { 
     this.number = number; 
    } 

    @XmlElement(name="FirstName") 
    public String getFirstName() { 
     return firstName; 
    } 

    public void setFirstName(String firstName) { 
     this.firstName = firstName; 
    } 

    @XmlElement(name="LastName") 
    public String getLastName() { 
     return lastName; 
    } 

    public void setLastName(String lastName) { 
     this.lastName = lastName; 
    } 

    @XmlElement(name="Address") 
    public String getAddress() { 
     return address; 
    } 

    public void setAddress(String address) { 
     this.address = address; 
    } 


} 

Main类

import javax.xml.bind.JAXBContext; 
import javax.xml.bind.JAXBException; 
import javax.xml.bind.Unmarshaller; 

import com.test.phoneDirectory.dataclass.PhoneDirectory; 
import com.test.phoneDirectory.dataclass.PhoneNumber; 


public class GetAllPhoneData { 

    public static void main(String[] args) throws JAXBException { 
     // TODO Auto-generated method stub 
     JAXBContext jc = JAXBContext.newInstance(PhoneDirectory.class); 

     Unmarshaller unmarshaller = jc.createUnmarshaller(); 
     PhoneDirectory phoneDirectory = (PhoneDirectory) unmarshaller.unmarshal(new File("src/config/PhoneDirectory.xml")); 


     System.out.println("Get all phone details"); 
     System.out.println("Exchange:"+phoneDirectory.getExchange()); 
     System.out.println("exchangeName:"+phoneDirectory.getExchangeName()); 


     for (PhoneNumber phonedetails : phoneDirectory.getPhoneNumber()) { 

      System.out.println(phonedetails.getId()); 
      System.out.println(phonedetails.getNumber()); 
      System.out.println(phonedetails.getFirstName()); 
      System.out.println(phonedetails.getLastName()); 
      System.out.println(phonedetails.getAddress()); 
    } 

    } 

} 

输出

Get all phone details  
Exchange: Ashfield  
****Get exchangeName :null****  
23  
0489524401  
Test  
Test  
#34,rt road, State,Country,22344 

正如你可以看到exchangeName是，尽管提XMLAttribute注解现场空。

感谢， 毗湿奴

Answer 1

你已经宣布在PhoneDirectory类的exchangeName属性，但您的XML具有在Exchange元素这个属性。

所以不是

private String exchange; 
private String exchangeName; 

你需要像Exchange一类@XmlAttributeexchangeName和@XmlValueexchange。