Java Code To Create XML File From XSD

Chapter: XML Last Updated: 23-04-2023 04:57:22 UTC

Program:

            /* ............... START ............... */
                
import java.io.File;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.JAXBElement;
import javax.xml.bind.Marshaller;
import javax.xml.bind.Unmarshaller;

public class XsdToXml {
    public static void main(String[] args) {
        try {
            // Create a new JAXBContext for the generated classes from the XSD
            JAXBContext context = JAXBContext.newInstance("com.example.generated");

            // Create an Unmarshaller to unmarshal the XSD file
            Unmarshaller unmarshaller = context.createUnmarshaller();

            // Unmarshal the XSD file into a JAXBElement
            JAXBElement<?> element = (JAXBElement<?>) unmarshaller.unmarshal(new File("example.xsd"));

            // Create a Marshaller to marshal the JAXBElement to XML
            Marshaller marshaller = context.createMarshaller();
            marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);

            // Marshal the JAXBElement to XML and write to a file
            marshaller.marshal(element, new File("example.xml"));
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

                /* ............... END ............... */

Notes:

The Java program converts an XSD (XML Schema Definition) file into an XML file using the javax.xml.bind package in Java.
The program starts by creating a new JAXBContext object using the JAXBContext.newInstance method, which takes a package name as an argument. This package name corresponds to the package name of the generated Java classes that were created from the XSD file.
Next, the program creates an Unmarshaller object using the createUnmarshaller method of the JAXBContext object, and uses it to unmarshal the XSD file into a JAXBElement object.
The program then creates a Marshaller object using the createMarshaller method of the JAXBContext object, and sets the JAXB_FORMATTED_OUTPUT property to true to ensure that the output XML is formatted for readability.
Finally, the program marshals the JAXBElement object to an XML file using the marshal method of the Marshaller object, and writes the output to a file.
The resulting XML file conforms to the rules defined in the XSD file, and has a structure and contents that depend on the structure and rules defined in the XSD file.