Java Language
XJC

introduzione

Sintassi

• xjc [opzioni] file di schema / URL / dir / jar ... [-b bindinfo] ...

Parametri

Osservazioni

Generazione di codice Java da semplice file XSD

Schema XSD (schema.xsd)

Il seguente schema xml (xsd) definisce un elenco di utenti con name e reputation attributi.

<?xml version="1.0"?>

<xs:schema version="1.0"
           xmlns:xs="http://www.w3.org/2001/XMLSchema"
           xmlns:ns="http://www.stackoverflow.com/users"
           elementFormDefault="qualified"
           targetNamespace="http://www.stackoverflow.com/users">
    <xs:element name="users" type="ns:Users"/>
    
    <xs:complexType name="Users">
        <xs:sequence>
            <xs:element type="ns:User" name="user" minOccurs="0" maxOccurs="unbounded"/>
        </xs:sequence>
    </xs:complexType>
    
    <xs:complexType name="User">
        <xs:attribute name="name" use="required" type="xs:string"/>
        <xs:attribute name="reputation" use="required">
            <xs:simpleType>
                <xs:restriction base="xs:int">
                    <xs:minInclusive value="1"/>
                </xs:restriction>
            </xs:simpleType>
        </xs:attribute>
    </xs:complexType>
</xs:schema>

Usando xjc

Ciò richiede il percorso dello strumento xjc (binari JDK) nella variabile del percorso del sistema operativo.

La generazione del codice può essere avviata usando

xjc schema.xsd

Questo genererà file java nella directory di lavoro.

File di risultati

Ci saranno alcuni commenti aggiuntivi, ma fondamentalmente i file java generati hanno il seguente aspetto:

package com.stackoverflow.users;

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.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "Users", propOrder = {
    "user"
})
public class Users {

    protected List<User> user;

    public List<User> getUser() {
        if (user == null) {
            user = new ArrayList<User>();
        }
        return this.user;
    }

}

package com.stackoverflow.users;

import javax.xml.bind.annotation.XmlAccessType;
import javax.xml.bind.annotation.XmlAccessorType;
import javax.xml.bind.annotation.XmlAttribute;
import javax.xml.bind.annotation.XmlType;

@XmlAccessorType(XmlAccessType.FIELD)
@XmlType(name = "User")
public class User {

    @XmlAttribute(name = "name", required = true)
    protected String name;
    @XmlAttribute(name = "reputation", required = true)
    protected int reputation;

    public String getName() {
        return name;
    }

    public void setName(String value) {
        this.name = value;
    }

    public int getReputation() {
        return reputation;
    }

    public void setReputation(int value) {
        this.reputation = value;
    }

}

package com.stackoverflow.users;

import javax.xml.bind.JAXBElement;
import javax.xml.bind.annotation.XmlElementDecl;
import javax.xml.bind.annotation.XmlRegistry;
import javax.xml.namespace.QName;

@XmlRegistry
public class ObjectFactory {

    private final static QName _Users_QNAME = new QName("http://www.stackoverflow.com/users", "users");

    public ObjectFactory() {
    }

    public Users createUsers() {
        return new Users();
    }

    public User createUser() {
        return new User();
    }

    @XmlElementDecl(namespace = "http://www.stackoverflow.com/users", name = "users")
    public JAXBElement<Users> createUsers(Users value) {
        return new JAXBElement<Users>(_Users_QNAME, Users.class, null, value);
    }

}

package-info.java

@javax.xml.bind.annotation.XmlSchema(namespace = "http://www.stackoverflow.com/users", elementFormDefault = javax.xml.bind.annotation.XmlNsForm.QUALIFIED)
package com.stackoverflow.users;