Javax.xml.bind.JAXB.marshal() Method

---

---

Description

The Javax.xml.bind.JAXB.marshal(Object jaxbObject, URL xml) method writes a Java object tree to XML and store it to the specified location.

Declaration

Following is the declaration for javax.xml.bind.JAXB.marshal(Object jaxbObject, URL xml) method

public static void marshal(Object jaxbObject, URL xml)

Parameters

• jaxbObject − The string is first interpreted as an absolute URI. If it's not a valid absolute URI, then it's interpreted as a File.

• xml − The XML will be sent to the resource pointed by this URL. Note that not all URLs support such operation, and exact semantics depends on the URL implementations. In case of HTTP URLs, this will perform HTTP POST.

Return Value

This method does not return any value.

Exception

DataBindingException − If the operation fails, such as due to I/O error, unbindable classes.

Example

The following example shows the usage of javax.xml.bind.JAXB.marshal(Object jaxbObject, URL xml) method. To proceed, consider the following Student class which will be used to have objects for marshalling purpose −

package com.tutorialspoint;

import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
 
@XmlRootElement
public class Student{
 
   String name;
   int age;
   int id;

   public String getName(){
      return name;
   }

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

   public int getAge(){
      return age;
   }

   @XmlElement
   public void setAge(int age){
      this.age = age;
   }

   public int getId(){
      return id;
   }

   @XmlAttribute
   public void setId(int id){
      this.id = id;
   }
}

Now let us create main class which will be used to marshal ie. convert Student object into an XML file. Here we will creat Binder object using JAXBContext because we can not create Binder object directly because it is an abstract class. This example marshals the Student object and prints it at STDOUT, but in practical scenario you can store the object in any file as an XML node.

package com.tutorialspoint;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import javax.xml.bind.JAXB;

public class JAXBDemo {
   public static void main(String[] args) throws IOException {
      // create student object
      Student st = new Student();
      st.setAge(12);
      st.setName("Sania");
      InputStream in = null;
         
      try {
         // create new URL
         String s = "http://www.tutorialspoint.com/result.xml";
         URL url = new URL(s);
            
         // saves student object to the file
         JAXB.marshal(st, url);
            
         // create new input stram
         in = (InputStream) url.openStream();
            
         int i=0;
            
         // read till the end of the xml file
         while((i=in.read())!=-1) {
            // convert integer to character
            char c = (char)i;
               
            // print
            System.out.print(c);
         }
      }catch(Exception ex) {
         ex.printStackTrace();
      }
   }
}

Before we proceed for compilation, we need to make sure that that we download JAXB2.xxx.jar and put it in our CLASSPATH. Once setup is ready, let us compile and run the above program, this will produce the following result −

<?xml version = "1.0" encoding = "UTF-8" standalone = "yes"?>
<student id = "10">
   <age>12</age>
   <name>Sania</name>
</student>