JAXB :Need Namespace Prefix to all the elements

I am Using Spring WebServiceTemplate to make webservice call which uses JAXB to generate request XML. My requirement needs all the elements (including root) to have a namespace prefix (there is only a single namespace) in the SOAP request.

Ex :

<ns1:Login xmlns:ns1="www.example.com/a">
    <ns1:username>abc</ns1:username>
    <ns1:password>abc</ns1:password>
</ns1:Login>

But i am getting

<Login xmlns="www.example.com/a">
    <username>abc<username>
    <password>abc<password>
</Login>

xsd :

<?xml version="1.0" encoding="UTF-8"?>
<xs:schema targetNamespace="www.example.com/a"   xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:ilreq="www.example.com/a" elementFormDefault="qualified" attributeFormDefault="unqualified">

<xs:complexType name="Login">
	<xs:sequence>
		<xs:element name="username" type="xs:string"/>
		<xs:element name="password" type="xs:string"/>
	</xs:sequence>
</xs:complexType>

Generated Java Class from XSD

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Login", propOrder = {
    "username",
    "password"
})

@XmlRootElement
public class Login {

@XmlElement(required = true)
protected String username;
@XmlElement(required = true)
protected String password;
......
}

package-info.java

@javax.xml.bind.annotation.XmlSchema(
    namespace = "www.example.com/a",
    elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package authenticator.beans.login;

Want to know how to generate the request XML with Namespace prefix to all elements including root.

Solved by adding

@XmlSchema(
    namespace = "http://www.example.com/a",
    elementFormDefault = XmlNsForm.QUALIFIED,
    xmlns = {
        @XmlNs(prefix="ns1", namespaceURI="http://www.example.com/a")
    }
)  

package authenticator.beans.login;
import javax.xml.bind.annotation.*;

in package-info.java

Took help of jaxb-namespaces-missing : Answer provided by Blaise Doughan

MSK,

Have you tried setting a namespace declaration to your member variables like this? :

@XmlElement(required = true, namespace = "http://example.com/a")
protected String username;

@XmlElement(required = true, namespace = "http://example.com/a")
protected String password;

For our project, it solved namespace issues. We also had to create NameSpacePrefixMappers.

Was facing this issue, Solved by adding package-info in my package

and the following code in it:

@XmlSchema(
    namespace = "http://www.w3schools.com/xml/",
    elementFormDefault = XmlNsForm.QUALIFIED,
    xmlns = {
        @XmlNs(prefix="", namespaceURI="http://www.w3schools.com/xml/")
    }
)  
package com.gateway.ws.outbound.bean;

import javax.xml.bind.annotation.XmlNs;
import javax.xml.bind.annotation.XmlNsForm;
import javax.xml.bind.annotation.XmlSchema;

To specify more than one namespace to provide prefixes, use something like:

@javax.xml.bind.annotation.XmlSchema(
	namespace = "urn:oecd:ties:cbc:v1", 
	elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED,
	xmlns ={@XmlNs(prefix="cbc", namespaceURI="urn:oecd:ties:cbc:v1"), 
			@XmlNs(prefix="iso", namespaceURI="urn:oecd:ties:isocbctypes:v1"),
			@XmlNs(prefix="stf", namespaceURI="urn:oecd:ties:stf:v4")})

... in package-info.java

Another way is to tell the marshaller to always use a certain prefix

marshaller.setProperty("com.sun.xml.bind.namespacePrefixMapper", new NamespacePrefixMapper() {
             @Override
            public String getPreferredPrefix(String arg0, String arg1, boolean arg2) {
                return "ns1";
            }
        });'

marshaller.setProperty only works on the JAX-B marshaller from Sun. The question was regarding the JAX-B marshaller from SpringSource, which does not support setProperty.