XML to Object Unmarshalling using JAXB

Question

I need to Unmarshal XML to Java Object, I have tried with below code. Its create an Object but set all value as a null. code for same:

 @XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Dispatch implements java.io.Serializable {
    private Integer dispatchId;
    private Order order;

    /**
     * @return the dispatchId
     */
    public Integer getDispatchId() {
        return dispatchId;
    }

    /**
     * @param dispatchId
     *            the dispatchId to set
     */
    public void setDispatchId(Integer dispatchId) {
        this.dispatchId = dispatchId;
    }

    /**
     * @return the order
     */
    public Order getOrder() {
        return order;
    }

    /**
     * @param order
     *            the order to set
     */
    public void setOrder(Order order) {
        this.order = order;
    }

    @Override
    public String toString() {
        // TODO Auto-generated method stub
        return ""+this.dispatchId;
    }
}

I have Dispatch Class with other sub class, i need to convert XML to Java Object. Code for same:

Public class UnmarshalExample {
    public static void main(String[] args) {
        String xmlString = "<ns1:dispatch xmlns:ns1=\"http://service.order.com\"><ns1:dispatchId>1</ns1:dispatchId><ns1:order><ns1:totalAmount>1000.0</ns1:totalAmount></ns1:order></ns1:dispatch>";

        Dispatch dispatch = (Dispatch) JAXB.unmarshal(
                new StringReader(xmlString), Dispatch.class);

        System.out.println(dispatch);
    }

}

As a output it will return null.

Can any one tell me whats wrong thing in my code?

Answer 1

That is odd, I pasted you code and ran and it produces dispatchId 1:

Dispatch class:

import javax.xml.bind.annotation.*;

@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Dispatch implements java.io.Serializable {
   private static final long serialVersionUID = 1L;
    private Integer dispatchId;

   /**
    * @return the dispatchId
    */
   public Integer getDispatchId() {
       return dispatchId;
   }

   /**
    * @param dispatchId
    *            the dispatchId to set
    */
   public void setDispatchId(Integer dispatchId) {
       this.dispatchId = dispatchId;
   }

   @Override
   public String toString() {
       // TODO Auto-generated method stub
       return ""+this.dispatchId;
   }
}

Test class

import java.io.*;
import javax.xml.bind.JAXB;

public class Test {

  public static void main(String[] args) {
    String xmlString = "<ns1:dispatch xmlns:ns1=\"http://service.order.com\"><ns1:dispatchId>1</ns1:dispatchId><ns1:order><ns1:totalAmount>1000.0</ns1:totalAmount></ns1:order></ns1:dispatch>";

    Dispatch dispatch = (Dispatch) JAXB.unmarshal(
            new StringReader(xmlString), Dispatch.class);

    System.out.println(dispatch);
  }
}

output is

1