How do I convert an XML persistence to Java Bean?

By Wayan in Beans 0 Comment

In the previous example you can see how to convert a bean into an XML persistence. Now we’ll do the opposite, converting the XML back to a bean. For the BeanToXML class use in this example please refer to How do I convert a bean to XML persistence? example.

package org.kodejava.bean;

import java.beans.XMLDecoder;
import java.io.BufferedInputStream;
import java.util.Objects;

public class XmlToBean {
    public static void main(String[] args) {
        XMLDecoder decoder = new XMLDecoder(new BufferedInputStream(
                Objects.requireNonNull(XmlToBean.class.getResourceAsStream("/Bean.xml"))));

        // Reads the next object from the underlying input stream.
        BeanToXML bean = (BeanToXML) decoder.readObject();
        decoder.close();

        System.out.println("ID              = " + bean.getId());
        System.out.println("Item Name       = " + bean.getItemName());
        System.out.println("Item Colour     = " + bean.getItemColour());
        System.out.println("Item Quantities = " + bean.getItemQuantities());
    }
}

Here is our Bean.xml persistence file:

<?xml version="1.0" encoding="UTF-8"?>
<java version="17" class="java.beans.XMLDecoder">
    <object class="org.kodejava.bean.BeanToXML">
        <void property="id">
            <long>1</long>
        </void>
        <void property="itemColour">
            <string>Dark Red</string>
        </void>
        <void property="itemName">
            <string>T-Shirt</string>
        </void>
        <void property="itemQuantities">
            <int>100</int>
        </void>
    </object>
</java>

The result are:

ID              = 1
Item Name       = T-Shirt
Item Colour     = Dark Red
Item Quantities = 100

How do I convert a bean to XML persistence?

By Wayan in Beans 0 Comment 
package org.kodejava.bean;

import java.beans.XMLEncoder;
import java.io.BufferedOutputStream;
import java.io.FileOutputStream;
import java.io.FileNotFoundException;

public class BeanToXML {
    private Long id;
    private String itemName;
    private String itemColour;
    private Integer itemQuantities;

    public static void main(String[] args) {
        BeanToXML bean = new BeanToXML();
        bean.setId(1L);
        bean.setItemName("T-Shirt");
        bean.setItemColour("Dark Red");
        bean.setItemQuantities(100);

        try {
            XMLEncoder encoder = new XMLEncoder(new BufferedOutputStream(
                    new FileOutputStream("Bean.xml")));

            // Write an XML representation of the specified object to the output.
            encoder.writeObject(bean);
            encoder.close();
        } catch (FileNotFoundException e) {
            e.printStackTrace();
        }
    }

    public Long getId() {
        return id;
    }

    public void setId(Long id) {
        this.id = id;
    }

    public String getItemName() {
        return itemName;
    }

    public void setItemName(String itemName) {
        this.itemName = itemName;
    }

    public String getItemColour() {
        return itemColour;
    }

    public void setItemColour(String itemColour) {
        this.itemColour = itemColour;
    }

    public Integer getItemQuantities() {
        return itemQuantities;
    }

    public void setItemQuantities(Integer itemQuantities) {
        this.itemQuantities = itemQuantities;
    }
}

The XML persistence will be like:

<?xml version="1.0" encoding="UTF-8"?>
<java version="17" class="java.beans.XMLDecoder">
 <object class="org.kodejava.bean.BeanToXML">
  <void property="id">
   <long>1</long>
  </void>
  <void property="itemColour">
   <string>Dark Red</string>
  </void>
  <void property="itemName">
   <string>T-Shirt</string>
  </void>
  <void property="itemQuantities">
   <int>100</int>
  </void>
 </object>
</java>