Generate java classes from xsd file

Using ‘xjc’ command, you can generate java classes from a xsd file.

For example, I have student.xsd file like below.

student.xsd

<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema">
    <xs:element name="student">
        <xs:complexType>
            <xs:sequence>
                <xs:element name="firstname" type="xs:string" />
                <xs:element name="middlename" type="xs:string" />
                <xs:element name="lastname" type="xs:string" />
                <xs:element name="age" type="xs:integer" />
                <xs:element name="department" type="xs:string" default="CSE" />
                <xs:element name="dresscode" type="xs:string" fixed="Black and White" />
            </xs:sequence>
        </xs:complexType>
    </xs:element>
</xs:schema>

Use following command to generate java classes from xsd file.

xjc -p com.sample.app.model student.xsd

$xjc -p com.sample.app.model student.xsd 
parsing a schema...
compiling a schema...
com/sample/app/model/ObjectFactory.java
com/sample/app/model/Student.java

Generated Classes

Student.java

//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.2.8-b130911.1802 
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a> 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2019.05.23 at 11:14:47 AM IST 
//


package com.sample.app.model;

import java.math.BigInteger;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlRootElement;
import javax.xml.bind.annotation.XmlType;


/**
 * <p>Java class for anonymous complex type.
 * 
 * <p>The following schema fragment specifies the expected content contained within this class.
 * 
 * <pre>
 * &lt;complexType>
 *   &lt;complexContent>
 *     &lt;restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
 *       &lt;sequence>
 *         &lt;element name="firstname" type="{http://www.w3.org/2001/XMLSchema}string"/>
 *         &lt;element name="middlename" type="{http://www.w3.org/2001/XMLSchema}string"/>
 *         &lt;element name="lastname" type="{http://www.w3.org/2001/XMLSchema}string"/>
 *         &lt;element name="age" type="{http://www.w3.org/2001/XMLSchema}integer"/>
 *         &lt;element name="department" type="{http://www.w3.org/2001/XMLSchema}string"/>
 *         &lt;element name="dresscode" type="{http://www.w3.org/2001/XMLSchema}string"/>
 *       &lt;/sequence>
 *     &lt;/restriction>
 *   &lt;/complexContent>
 * &lt;/complexType>
 * </pre>
 * 
 * 
 */
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "", propOrder = {
    "firstname",
    "middlename",
    "lastname",
    "age",
    "department",
    "dresscode"
})
@XmlRootElement(name = "student")
public class Student {

    @XmlElement(required = true)
    protected String firstname;
    @XmlElement(required = true)
    protected String middlename;
    @XmlElement(required = true)
    protected String lastname;
    @XmlElement(required = true)
    protected BigInteger age;
    @XmlElement(required = true, defaultValue = "CSE")
    protected String department;
    @XmlElement(required = true)
    protected String dresscode;

    /**
     * Gets the value of the firstname property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getFirstname() {
        return firstname;
    }

    /**
     * Sets the value of the firstname property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setFirstname(String value) {
        this.firstname = value;
    }

    /**
     * Gets the value of the middlename property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getMiddlename() {
        return middlename;
    }

    /**
     * Sets the value of the middlename property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setMiddlename(String value) {
        this.middlename = value;
    }

    /**
     * Gets the value of the lastname property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getLastname() {
        return lastname;
    }

    /**
     * Sets the value of the lastname property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setLastname(String value) {
        this.lastname = value;
    }

    /**
     * Gets the value of the age property.
     * 
     * @return
     *     possible object is
     *     {@link BigInteger }
     *     
     */
    public BigInteger getAge() {
        return age;
    }

    /**
     * Sets the value of the age property.
     * 
     * @param value
     *     allowed object is
     *     {@link BigInteger }
     *     
     */
    public void setAge(BigInteger value) {
        this.age = value;
    }

    /**
     * Gets the value of the department property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getDepartment() {
        return department;
    }

    /**
     * Sets the value of the department property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setDepartment(String value) {
        this.department = value;
    }

    /**
     * Gets the value of the dresscode property.
     * 
     * @return
     *     possible object is
     *     {@link String }
     *     
     */
    public String getDresscode() {
        return dresscode;
    }

    /**
     * Sets the value of the dresscode property.
     * 
     * @param value
     *     allowed object is
     *     {@link String }
     *     
     */
    public void setDresscode(String value) {
        this.dresscode = value;
    }

}

ObjectFactory.java

//
// This file was generated by the JavaTM Architecture for XML Binding(JAXB) Reference Implementation, v2.2.8-b130911.1802 
// See <a href="http://java.sun.com/xml/jaxb">http://java.sun.com/xml/jaxb</a> 
// Any modifications to this file will be lost upon recompilation of the source schema. 
// Generated on: 2019.05.23 at 11:14:47 AM IST 
//


package com.sample.app.model;

import javax.xml.bind.annotation.XmlRegistry;


/**
 * This object contains factory methods for each 
 * Java content interface and Java element interface 
 * generated in the com.sample.app.model package. 
 * <p>An ObjectFactory allows you to programatically 
 * construct new instances of the Java representation 
 * for XML content. The Java representation of XML 
 * content can consist of schema derived interfaces 
 * and classes representing the binding of schema 
 * type definitions, element declarations and model 
 * groups.  Factory methods for each of these are 
 * provided in this class.
 * 
 */
@XmlRegistry
public class ObjectFactory {


    /**
     * Create a new ObjectFactory that can be used to create new instances of schema derived classes for package: com.sample.app.model
     * 
     */
    public ObjectFactory() {
    }

    /**
     * Create an instance of {@link Student }
     * 
     */
    public Student createStudent() {
        return new Student();
    }

}

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