JAXB (Java Xml Binding – https://jaxb.dev.java.net/) frameworkü kullanılarak Xml–>Java, Java–>Xml mapping işlemlerini gerçekleştirmek mümkündür. Bu yazılımcıya, Xml dosyalarının ihtiva ettiği verileri Java sınıflarıyla modelleme imkanı sunmakta ve verilerın işlenmesini kolaylaştırmaktadır.
Simdi daha once`den olusturmus oldugumuz schema1.xsd dosyasini kullanarak, Xml–>Java mapping islemini yapacagiz... XJC kutuphanesinden yararlanarak yukaridaki bahsettigimiz islemleri gerceklestirmeye calisacagiz...
NOT : CLASSPATH ayarlarini oldugunu varsayarak yapilmistir, bundan onceki konumuzda, classpath icin gereken ayarlamalardan bahsedilmektedir....
JAXB tarafından oluşturulan sınıflar aşağıda yer almaktadır.
Student
package gensrc;
import java.util.ArrayList;
import java.util.List;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlElement;
import javax.xml.bind.annotation.XmlType;
/**
*
Java class for student complex type.
*
*
The following schema fragment specifies the expected content contained within this class.
*
*
* <complexType name="student">
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <sequence>
* <element name="exams" type="{}exam" maxOccurs="unbounded" minOccurs="0"/>
* <element name="fullName" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>
* <element name="id" type="{http://www.w3.org/2001/XMLSchema}long" minOccurs="0"/>
* </sequence>
* </restriction>
* </complexContent>
* </complexType>
*
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "student", propOrder = {
"exams",
"fullName",
"id"
})
public class Student {
@XmlElement(nillable = true)
protected List
exams;
protected String fullName;
protected Long id;
/**
* Gets the value of the exams property.
*
*
* This accessor method returns a reference to the live list,
* not a snapshot. Therefore any modification you make to the
* returned list will be present inside the JAXB object.
* This is why there is not a set method for the exams property.
*
*
* For example, to add a new item, do as follows:
*
* getExams().add(newItem);
*
*
*
*
* Objects of the following type(s) are allowed in the list
* {@link Exam }
*
*
*/
public List
getExams() {
if (exams == null) {
exams = new ArrayList();
}
return this.exams;
}
/**
* Gets the value of the fullName property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getFullName() {
return fullName;
}
/**
* Sets the value of the fullName property.
*
* @param value
* allowed object is
* {@link String }
*
*/
public void setFullName(String value) {
this.fullName = value;
}
/**
* Gets the value of the id property.
*
* @return
* possible object is
* {@link Long }
*
*/
public Long getId() {
return id;
}
/**
* Sets the value of the id property.
*
* @param value
* allowed object is
* {@link Long }
*
*/
public void setId(Long value) {
this.id = value;
}
}
Exam.java
package gensrc;
import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlSchemaType;
import javax.xml.bind.annotation.XmlType;
import javax.xml.datatype.XMLGregorianCalendar;
/**
*
Java class for exam complex type.
*
*
The following schema fragment specifies the expected content contained within this class.
*
*
* <complexType name="exam">
* <complexContent>
* <restriction base="{http://www.w3.org/2001/XMLSchema}anyType">
* <sequence>
* <element name="examDate" type="{http://www.w3.org/2001/XMLSchema}dateTime" minOccurs="0"/>
* <element name="examScore" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>
* <element name="name" type="{http://www.w3.org/2001/XMLSchema}string" minOccurs="0"/>
* </sequence>
* </restriction>
* </complexContent>
* </complexType>
*
*
*
*/
@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "exam", propOrder = {
"examDate",
"examScore",
"name"
})
public class Exam {
@XmlSchemaType(name = "dateTime")
protected XMLGregorianCalendar examDate;
protected String examScore;
protected String name;
/**
* Gets the value of the examDate property.
*
* @return
* possible object is
* {@link XMLGregorianCalendar }
*
*/
public XMLGregorianCalendar getExamDate() {
return examDate;
}
/**
* Sets the value of the examDate property.
*
* @param value
* allowed object is
* {@link XMLGregorianCalendar }
*
*/
public void setExamDate(XMLGregorianCalendar value) {
this.examDate = value;
}
/**
* Gets the value of the examScore property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getExamScore() {
return examScore;
}
/**
* Sets the value of the examScore property.
*
* @param value
* allowed object is
* {@link String }
*
*/
public void setExamScore(String value) {
this.examScore = value;
}
/**
* Gets the value of the name property.
*
* @return
* possible object is
* {@link String }
*
*/
public String getName() {
return name;
}
/**
* Sets the value of the name property.
*
* @param value
* allowed object is
* {@link String }
*
*/
public void setName(String value) {
this.name = value;
}
}
ObjectFactory
package gensrc;
import javax.xml.bind.annotation.XmlRegistry;
/**
* This object contains factory methods for each
* Java content interface and Java element interface
* generated in the gensrc package.
* 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: gensrc
*
*/
public ObjectFactory() {
}
/**
* Create an instance of {@link Exam }
*
*/
public Exam createExam() {
return new Exam();
}
/**
* Create an instance of {@link Student }
*
*/
public Student createStudent() {
return new Student();
}
}
Simdide olusan class`larimi kullanarak, classlarimiza uygun XML data oluturalim
import gensrc.Exam;
import gensrc.Student;
import java.io.StringWriter;
import javax.xml.bind.JAXBContext;
import javax.xml.bind.Marshaller;
public class Main {
public static void main(String[] args) throws Exception {
Student student = new Student();
student.setFullName("Ertugrul Aslan");
student.setId(new Long(3123123));
Exam e = new Exam();
e.setExamDate(null);
e.setExamScore("PASS");
e.setName("Matematik");
student.getExams().add(e);
e = new Exam();
e.setExamDate(null);
e.setExamScore("PASS");
e.setName("Fizik");
student.getExams().add(e);
Marshaller marshaller = null;
marshaller = JAXBContext.newInstance(Student.class).createMarshaller();
marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, true);
StringWriter writer = new StringWriter();
marshaller.marshal(student, writer);
System.out.println(writer.getBuffer().toString());
}
}
