Generate classes for XML Schema (xjc)

Fie o schema (model.xsd):

<?xml version="1.0"?> <xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema"> <xs:complexType name="StudentType"> <xs:sequence> <xs:element name="firstname" type="xs:string"/> <xs:element name="lastname" type="xs:string"/> <xs:element name="nickname" type="xs:string"/> <xs:element name="marks" type="xs:integer"/> </xs:sequence> <xs:attribute name="rollno" type="xs:integer"/> </xs:complexType> <xs:complexType name="SpecialtyType"> <xs:sequence> <xs:element name="phd" type="xs:string"/> <xs:element name="year" type="YearType"/> </xs:sequence> <xs:attribute name="rollno" type="xs:integer"/> </xs:complexType> <xs:complexType name="YearType"> <xs:simpleContent> <xs:extension base="xs:integer"> <xs:attribute name="obtained" type="xs:string"/> </xs:extension> </xs:simpleContent> </xs:complexType> <xs:complexType name="ProfType"> <xs:sequence> <xs:element name="name" type="xs:string"/> <xs:element name="specialty" type="SpecialtyType"/> </xs:sequence> </xs:complexType> <xs:complexType name="ClassType"> <xs:sequence> <xs:element name="student" type="StudentType" maxOccurs="unbounded"/> <xs:element name="professor" type="ProfType" maxOccurs="unbounded"/> </xs:sequence> </xs:complexType> <xs:element name="class" type="ClassType"/> </xs:schema>

Si o implementare (input.xml):

<?xml version="1.0"?> <?xml version="1.0" encoding="UTF-8" ?> <class> <student rollno="393"> <firstname>dinkar</firstname> <lastname>kad</lastname> <nickname>dinkar</nickname> <marks>85</marks> </student> <student rollno="493"> <firstname>Vaneet</firstname> <lastname>Gupta</lastname> <nickname>vinni</nickname> <marks>95</marks> </student> <student rollno="593"> <firstname>jasvir</firstname> <lastname>singn</lastname> <nickname>jazz</nickname> <marks>90</marks> </student> <professor> <name>cheng</name> <specialty> <phd>biology</phd> <year obtained="no">2017</year> </specialty> </professor> <professor> <name>feng</name> <specialty> <phd>physics</phd> <year obtained="yes">2010</year> </specialty> </professor> </class>

Metoda (1)

In Maven (pom.xml)

<?xml version="1.0"?> <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd"> <modelversion>4.0.0</modelVersion> <groupid>com.parsing</groupId> <artifactid>ParserTest</artifactId> <packaging>jar</packaging> <version>1.0-SNAPSHOT</version> <name>ParserTest</name> <url>http://maven.apache.org</url> <build> <plugins> <plugin> <groupid>org.codehaus.mojo</groupId> <artifactid>jaxb2-maven-plugin</artifactId> <version>2.3</version> <executions> <execution> <id>xjc</id> <goals> <goal>xjc</goal> </goals> </execution> </executions> <configuration> <sources> <source>/src/main/resources/model.xsd</source> </sources> </configuration> </plugin> </plugins> </build> <dependencies> <dependency> <groupid>junit</groupId> <artifactid>junit</artifactId> <version>3.8.1</version> <scope>test</scope> </dependency> </dependencies> </project>

(mvn clean install) => target/generatedSources/jaxb/generated/


Metoda (2)

Cu xjc din suita jdk-ului:

> xjc -d <path-to-folder-to-add> -p <package-name> model.xsd

Comanda creeaza un proiect nou avand fisierele sursa generate din schema.


Utilizare pentru parsarea lui input.xml:

File file = new File(MyDOMParser.FILENAME); try { JAXBContext jaxbContext = JAXBContext.newInstance(ObjectFactory.class); ClassType classType = ((JAXBElement<classtype>) jaxbContext.createUnmarshaller().unmarshal(file)).getValue(); for (StudentType student : classType.getStudent()) { System.out.println("Student; rollNo=" + student.getRollno() + "\n\t" + "Name: " + student.getFirstname() + " " + student.getLastname() + " (" + student.getNickname() + ")\n\t" + "Marks: " + student.getMarks()); } for (ProfType prof : classType.getProfessor()) { System.out.println("Prof\n\t" + "Name: " + prof.getName() + "\n\t" + "Specialty: \n\t\tphd=" + prof.getSpecialty().getPhd() + "\n\t\tYear=" + prof.getSpecialty().getYear().getValue() + " (obtained " + prof.getSpecialty().getYear().getObtained() + ")"); } } catch (Exception e) { e.printStackTrace(); }