XML属性解组的空值

Question

这是我的xml文件，在解组和其余所有值都将被打印时，它返回type和currency的空值。我在这里使用了解组，所有父级和子级POOJ都已指定，最后我的Main方法调用了解组函数1）Vehicle.xml

<?xml version="1.0" encoding="UTF-8"?>
<Vehicle>
   <car>
      <manufacturer>Maruti</manufacturer>
      <cost currency="INR">675000</cost>
      <name type="sedan">Ciaz</name>
      <fuelType>Petrol</fuelType>
      <driverType>Manual</driverType>
   </car>
   <car>
      <manufacturer>Maruti</manufacturer>
      <cost currency="INR">575000</cost>
      <name type="sedan">Dezire</name>
      <fuelType>Petrol</fuelType>
      <driverType>Manual</driverType>
   </car>
</Vehicle>

各个文件为2）Vehicle.java

package jaxb;

import java.util.List;

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

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

    @XmlElement
    private List<Car> car;

    public List<Car> getCar() {
        return car;
    }

    @Override
    public String toString() {
        return "Vehicle[ Car=" + car + "]";
    }

}

3）POJO Car.java的子级>

package jaxb;

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

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

    private String manufacturer;
    private String name;
    private String driverType;
    private String fuelType;
    private String currency;


    @XmlAttribute
    public String getCurrency() {
        return currency;
    }
    public void setCurrency(String currency) {
        this.currency = currency;
    }

    @XmlAttribute
    public String getType() {
        return type;
    }
    public void setType(String type) {
        this.type = type;
    }


    private String type;

    private int cost;

    @XmlElement
    public String getManufacturer() {
        return manufacturer;
    }
    public void setManufacturer(String manufacturer) {
        this.manufacturer = manufacturer;
    }

    @XmlElement
    public String getName() {
        return name;
    }
    public void setName(String name) {
        this.name = name;
    }

    @XmlElement
    public String getDriverType() {
        return driverType;
    }
    public void setDriverType(String driverType) {
        this.driverType = driverType;
    }

    @XmlElement
    public String getFuelType() {
        return fuelType;
    }
    public void setFuelType(String fuelType) {
        this.fuelType = fuelType;
    }

    @XmlElement
    public int getCost() {
        return cost;
    }
    public void setCost(int cost) {
        this.cost = cost;
    }


     @Override
        public String toString() {
            return "Car [name=" + name + ", fuelType=" + fuelType + ", cost=" + cost+",driverType="+driverType +",currency="+currency+ " , type="+type +"]";
        }


}
4）为解组而战”
package jaxb;

import java.io.File;
import java.util.ArrayList;
import java.util.List;

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

public class VehicleJxb {

    public void unmarhalling() {

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

            Unmarshaller jaxbUnmarshaller = jaxbContext.createUnmarshaller();

            Vehicle vehicle = (Vehicle) jaxbUnmarshaller.unmarshal(new File("src\\main\\java\\Data\\Vehicle.xml"));

            System.out.println(vehicle);

        } catch (JAXBException e) {

            e.printStackTrace();
        }

    }

}
5）最终输出
Vehicle[ Car=[Car [name=Ciaz, fuelType=Petrol, cost=675000,driverType=Manual,currency=null , type=null], Car [name=Dezire, fuelType=Petrol, cost=575000,driverType=Manual,currency=null , type=null]]]
这是我的xml文件，在解组和其余所有值都已打印时，它会返回类型和货币的空值。我在这里使用过编组，所有的父级和子级POOJ都是...

Answer 1

尝试此：

@XmlAttribute(name = "cost currency")
public String getCurrency() {
    return currency;
}

Answer 2

一种常见的方法是添加一个额外的类来处理属性+值。如果您不希望在使用Car时进行额外的间接访问。您可以向其中添加快捷方式获取器。