Convert Xml to Java Object Using Jaxb (Unmarshal)

XML to java object using jaxb Unmarshalling namespace

create package-info.java in your package and remove

namespace="http://schema.cs.csg.com/cs/ib/cpm" from @XmlRootElement.

package-info.java

@XmlSchema(
    namespace="http://schema.cs.csg.com/cs/ib/cpm",
    elementFormDefault=XmlNsForm.QUALIFIED
)
package com.cs.xmlparser;

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

Use JAXB to create Object from XML String

To pass XML content, you need to wrap the content in a Reader, and unmarshal that instead:

JAXBContext jaxbContext = JAXBContext.newInstance(Person.class);
Unmarshaller unmarshaller = jaxbContext.createUnmarshaller();

StringReader reader = new StringReader("xml string here");
Person person = (Person) unmarshaller.unmarshal(reader);

Unable to Unmarshall a xml in java using JAXB without using any annotation- No error but Unmarshalling is incorrect

In the xml you don't have to specify the class name (Customer) as the child of your list (customerList), just use the list name directly for every element.

So, change the xml like this:

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<basePojo>
<customerId>C001</customerId>

<customerList>
    <name>Ram</name>
    <phoneNo>123445</phoneNo>
</customerList>

<customerList>
    <name>Tom</name>
    <phoneNo>2332322</phoneNo>
</customerList>

</basePojo>

Java jaxb unmarshalling from xml to java object returns null value

The problem is that your POJOS + annotations do not correctly map to the provided xml. Specifically in "SupplierRootDto" field "supplierDtos" needs to change or use annotation to override as below:

@XmlRootElement(name = "suppliers")
@XmlAccessorType(XmlAccessType.FIELD)
public class SupplierRootDto {

    // ADD NAME TO MATCH THE XML ELEMENT
    @XmlElement(name = "supplier")
    private List<SupplierDto> supplierDtos;

    public SupplierRootDto() {
    }

    public List<SupplierDto> getSupplierDtos() {
        return supplierDtos;
    }

    public void setSupplierDtos(List<SupplierDto> supplierDtos) {
        this.supplierDtos = supplierDtos;
    }
}

Then it will unmarshal properly.

Why is jaxb not unmarshalling this XML document into a Java object?

You need to specify the namespace at the element level.
For example:

@XmlElement(name = "id", namespace = "http://purl.org/atom/ns#")
private String id;

To set a default namespace you can do it at the package level, creating the package-info.java file in the package folder with a content like this:

@XmlSchema(
    namespace = "http://purl.org/atom/ns#",
    elementFormDefault = XmlNsForm.QUALIFIED)
package your.model.package;

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

Besides, as you are explicitly adding @XmlElement to all your fields, you can remove the @XmlAccessorType(XmlAccessType.FIELD) annotation, as it's purpose it's to map by default all fields to elements.

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