[英]NULL values in JAXB unmarshalling
HI I want to fetch the value of nested xml using un-marshaling using maven dependency but the final output is returning me null values .I have used the 3 packages in maven project and vehicle.xml contains the values of car after fetching the values I have to insert them into access Database HI I want to fetch the value of nested xml using un-marshaling using maven dependency but the final output is returning me null values .I have used the 3 packages in maven project and vehicle.xml contains the values of car after fetching the values I必须将它们插入访问数据库
<?xml version="1.0" encoding="UTF-8"?>
<Vehicle>
<Car>
<manufacturer>Maruti</manufacturer>
<cost>675000</cost>
<name>Ciaz</name>
<fueType>Petrol</fueType>
<driverTye>Manual</driverTye>
</Car>
<Car>
<manufacturer>Maruti</manufacturer>
<cost>575000</cost>
<name>Dezire</name>
<fueType>Petrol</fueType>
<driverTye>Manual</driverTye>
</Car>
</Vehicle>
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;
}
/*
* public Vehicle(List<Car> car) { super(); this.car = car; }
*/
@Override
public String toString() {
return "Vehicle[ Car="+car+"]";
}
}
package jaxb;
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 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 +"]";
}
This file contains the implementation of our unmarshalling method该文件包含我们的解组方法的实现
package jaxb;
import java.io.File;
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) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
package com.project.XMLDB;
import jaxb.*;
public class App
{
public static void main( String[] args )
{
VehicleJxb obj= new VehicleJxb();
obj.unmarhalling();
}
}
My Output is coming我的 Output 来了
WARNING: An illegal reflective access operation has occurred
WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector (file:/C:/Users/Shivam%20Sharma/.m2/repository/com/sun/xml/bind/jaxb-impl/2.2.11/jaxb-impl-2.2.11.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector
WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
WARNING: All illegal access operations will be denied in a future release
Vehicle[ Car=null]
I want to get the values as final output is returned null我想得到最终的值 output 返回 null
Unmarshaller
is case sensitive. Unmarshaller
区分大小写。 In your pojo, you have variable name car
but in XML you Car
.在你的 pojo 中,你有变量名
car
但在 XML 你有Car
。 Change it to the following and it will work.将其更改为以下内容,它将起作用。
<?xml version="1.0" encoding="UTF-8"?>
<Vehicle>
<car>
<manufacturer>Maruti</manufacturer>
<cost>675000</cost>
<name>Ciaz</name>
<fueType>Petrol</fueType>
<driverTye>Manual</driverTye>
</car>
<car>
<manufacturer>Maruti</manufacturer>
<cost>575000</cost>
<name>Dezire</name>
<fueType>Petrol</fueType>
<driverTye>Manual</driverTye>
</car>
</Vehicle>
Or you need to mention that explicitly.或者您需要明确提及。
@XmlElement(name = "Car")
private List<Car> car;
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